최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0284308 (2005-11-21) |
등록번호 | US-7258171 (2007-08-21) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 77 인용 특허 : 190 |
A holding member provides for releasably positioning a rotating control head assembly in a subsea housing. The holding member engages an internal formation in the subsea housing to resist movement of the rotating control head assembly relative to the subsea housing. The rotating control head assembl
A holding member provides for releasably positioning a rotating control head assembly in a subsea housing. The holding member engages an internal formation in the subsea housing to resist movement of the rotating control head assembly relative to the subsea housing. The rotating control head assembly is sealed with the subsea housing when the holding member engages the internal formation. An extendible portion of the holding member assembly extrudes an elastomer between an upper portion and a lower portion of the internal housing to seal the rotating control head assembly with the subsea housing. Pressure relief mechanisms release excess pressure in the subsea housing and a pressure compensation mechanism pressurize bearings in the bearing assembly at a predetermined pressure.
We claim: 1. A system adapted for forming a borehole using a rotatable pipe and a fluid, the system comprising: a subsea housing disposed above the borehole; a bearing assembly positioned with the subsea housing, comprising: an outer member, and an inner member rotatable relative to the outer membe
We claim: 1. A system adapted for forming a borehole using a rotatable pipe and a fluid, the system comprising: a subsea housing disposed above the borehole; a bearing assembly positioned with the subsea housing, comprising: an outer member, and an inner member rotatable relative to the outer member and having a passage through which the rotatable pipe may extend; a bearing assembly seal to sealably engage the rotatable pipe with the bearing assembly; and a holding member for positioning the bearing assembly with the subsea housing. 2. The system of claim 1, further comprising: a holding member assembly including the holding member, and a first seal disposed between the holding member assembly and the subsea housing. 3. The system of claim 2, wherein the first seal comprising: an annular seal. 4. The system of claim 2, wherein the bearing assembly is removably positioned with the holding member assembly. 5. The system of claim 2, wherein the holding member is movable relative to the holding member assembly. 6. The system of claim 1, further comprising: a stack positioned from an ocean floor, wherein the subsea housing is positioned above and in fluid communication with the stack. 7. The system of claim 1, wherein the first seal is movable between a sealed position and an unsealed position. 8. The system of claim 1, wherein the subsea housing is sealed with the bearing assembly by the first seal. 9. The system of claim 1, wherein the first seal is movable between a sealed position and an unsealed position, wherein the subsea housing is sealed with the bearing assembly when the first seal is in the sealed position. 10. The system of claim 1, whereby the holding member blocks movement of the bearing assembly relative to the subsea housing. 11. A system adapted for forming a borehole having a borehole fluid pressure, the system using a rotatable pipe and a fluid, the system comprising: a subsea housing disposed above the borehole; a bearing assembly removably positioned with the subsea housing, comprising: an outer member; and an inner member rotatable relative to the outer member and having a passage through which the rotatable pipe may extend; a bearing assembly seal to sealably engage the rotatable pipe; a holding member for removably positioning the bearing assembly with the subsea housing; and a first seal, the bearing assembly sealed with the subsea housing by the first seal. 12. The system of claim 11, wherein the subsea housing comprising: a passive latching formation. 13. The system of claim 11, wherein the bearing assembly is removably positioned with the holding member. 14. The system of claim 11, wherein the holding member comprising: a shoulder. 15. The system of claim 11, wherein the first seal is removably positioned with the subsea housing. 16. The system of claim 11, wherein the first seal is movable between a sealed position and an unsealed position, wherein the subsea housing is sealed by the first seal when the first seal is in the sealed position, and wherein the holding member is removable from the subsea housing when the first seal is in the unsealed position. 17. A system adapted for forming a borehole in a floor of an ocean, the borehole having a borehole fluid pressure, the system using a fluid, the system comprising: a lower tubular adapted to be fixed relative to the floor of the ocean; a subsea housing disposed above the lower tubular; a bearing assembly removably positioned with the subsea housing, comprising: an outer member; and an inner member rotatable relative to the outer member and having a passage therethrough; a bearing assembly seal disposed with the inner member; an internal housing communicating with the bearing assembly, comprising: a holding member extending from the internal housing for positioning with the subsea housing; and a first seal movable between a sealed position and an unsealed position, wherein the internal housing seals with the subsea housing when the first seal is in the sealed position, and wherein a pressure of the fluid below the first seal can be managed. 18. A method for controlling the pressure of a fluid in a borehole while sealing a rotatable pipe, comprising the steps of: positioning a subsea housing above the borehole; holding a bearing assembly within the subsea housing, the bearing assembly comprising: an outer member; and an inner member rotatable relative to the outer member and having a passage through which the rotatable pipe may extend; sealing the bearing assembly with the rotatable pipe; and sealing the subsea housing with the bearing assembly to control the pressure of the fluid in the borehole. 19. The method of claim 18, further comprising the step of: rotating the rotatable pipe while managing the pressure of the fluid in the borehole. 20. The method of claim 18, further comprising the step of: removably positioning the bearing assembly with an internal housing. 21. The method of claim 20, further comprising the step of: sealing the subsea housing with the internal housing. 22. The method of claim 21, further comprising the step of: moving a first seal from a retracted position to an extended sealed position for sealing the subsea housing with the internal housing. 23. A rotating control head system, comprising: a first tubular; an outer member removably positionable relative to the first tubular, an inner member disposed within the outer member, the inner member having a passage running therethrough and adapted to receive and sealingly engage a rotatable pipe; bearings disposed between the outer member and the inner member to rotate the inner member relative to the outer member when the inner member is sealingly engaged with the rotatable pipe; a subsea housing connectable to the first tubular; and a holding member for positioning the outer member with the subsea housing. 24. The rotating control head system of claim 23, wherein the holding member is movable between a retracted position and an engaged position. 25. The rotating control head system of claim 24, wherein the holding member engages the subsea housing when the holding member is in the engaged position. 26. The rotating control head system of claim 25, further comprising a running tool, wherein holding member is moved from the retracted position to the engaged position with the subsea housing by moving the running tool. 27. The rotating control head system of claim 26, wherein the running tool can retrieve the outer member when the holding member is in the retracted position. 28. The rotating control head system of claim 23, further comprising a first seal, wherein the first seal moves between an unsealed position and a sealed position, the outer member sealed with the subsea housing by the first seal when the first seal is in the sealed position; and wherein the holding member limits movement of the outer member when the first seal is in the sealed position. 29. The rotating control head system of claim 28, further comprising a second tubular, wherein the second tubular contains a second fluid having a second fluid pressure, wherein the first tubular contains a first fluid having a first fluid pressure, and wherein when the first seal is in the sealed position, the second fluid pressure can differ from the first fluid pressure. 30. The rotating control head system of claim 23, wherein the holding member comprising: a plurality of angled shoulders. 31. A method of forming a borehole, comprising the steps of: positioning a housing above the borehole; moving a rotating control head relative to the housing; extending a rotatable pipe through the rotating control head and into the borehole; positioning the rotating control head relative to the housing; sealing the rotating control head with the housing; sealing an inner member of the rotating control head with the rotatable pipe, the inner member rotating with the rotatable pipe relative to an outer member of the rotating control head, providing a first fluid within the borehole, the first fluid having a first fluid pressure; providing a second fluid within the housing, the second fluid having a second fluid pressure different from the first fluid pressure. 32. The method of claim 31, further comprising the step of: limiting movement of the rotating control head when the rotating control head is sealed with the housing. 33. The method of claim 31, wherein the rotating control head is positioned above the housing. 34. The method of claim 31, wherein the rotating control head is positioned below the housing. 35. The method of claim 31, wherein the housing is a subsea housing, the method further comprising the step of: forming the borehole while the inner member is sealed with the rotatable pipe and the subsea housing is sealed with the outer member. 36. A system adapted for forming a borehole using a rotatable pipe and a fluid, the system comprising: a first housing having a bore running therethrough; a bearing assembly disposed relative to the bore, the bearing assembly comprising: an inner member adapted to slidingly receive and sealingly engage the rotatable pipe, wherein rotation of the rotatable pipe rotates the inner member; and an outer member for rotatably supporting the inner member; a holding member for positioning the bearing assembly relative to the first housing; and a seal having an elastomer element for sealingly engaging the bearing assembly with the first housing. 37. An internal riser rotating control head system, the system comprising: a housing having a bore running therethrough; a bearing assembly disposed relative to the bore, the bearing assembly comprising: an inner member adapted to slidingly receive the rotatable pipe, the inner member having a sealing element, wherein rotation of the rotatable pipe rotates the inner member; and an outer member for rotatably supporting the inner member, a holding member for positioning the bearing assembly relative to the housing; and a seal for sealing the bearing assembly with the housing. 38. A system for positioning a rotating control head, the system comprising: a subsea housing having an internal formation; a bearing assembly having a passage for receiving a rotatable pipe; and a holding member assembly connectable to the bearing assembly and the subsea housing, comprising: an internal housing coupled to the bearing assembly; and a holding member coupled to the internal housing, the holding member engaging the internal formation to position the holding member assembly with the subsea housing. 39. The system of claim 38, the bearing assembly further comprising: a plurality of guide members on the bearing assembly. 40. The system of claim 38, the holding member comprising: a latching portion; and a plurality of openings. 41. The system of claim 40, the holding member assembly further comprising: a pressure relief member for releasing pressure. 42. The system of claim 41, the pressure relief member comprising: a valve engaging the plurality of openings in the holding member. 43. The system of claim 38, further comprising: a running tool for moving the rotating control head assembly into the subsea housing, the subsea housing comprising: a plurality of passive formations for engaging with the holding member assembly. 44. The system of claim 43, wherein the running tool is rotated in a first direction for drilling, and wherein the running tool is rotated in a second direction, rotationally opposite to the first direction, to disengage the running tool from the holding member assembly. 45. The system of claim 38, wherein the holding member is releasably positioned with the subsea housing. 46. The system of claim 38, the subsea housing further comprising: a landing shoulder for blocking movement of the holding member assembly. 47. The system of claim 46, wherein the holding member assembly latches with the subsea housing when the holding member assembly engages the landing shoulder and is rotated. 48. The system of claim 47, further comprising: a running tool for moving the rotating control head assembly into the subsea housing, wherein the running tool rotates in a first direction during drilling, and wherein the holding member assembly disengages with the subsea housing when the running tool is rotated in a second direction rotationally opposite to the first direction. 49. The system of claim 38, wherein the holding member assembly is threadedly connected to the bearing assembly. 50. The system of claim 38, the subsea housing having axially aligned openings, the subsea housing further comprising: a first side opening; and a second side opening spaced apart from the first side opening. 51. The system of claim 50, wherein the subsea housing internal formation is between the first side opening and the second side opening. 52. The system of claim 50, wherein the holding member assembly is sealed with the subsea housing between the first side opening and the second side opening. 53. A rotating control head system, the system comprising: a bearing assembly having a passage sized to receive a pipe; and a holding member assembly connected to the bearing assembly, comprising: an internal housing, comprising: a holding member chamber; and a holding member positioned within the holding member chamber, the holding member movable between a retracted position and an extended position; and an extendible portion concentrically interior to and slidably connectable to the internal housing. 54. The system of claim 53, wherein the holding member assembly is threadedly connected to the bearing assembly. 55. The system of claim 53, further comprising a subsea housing, wherein the holding member assembly is releasably positionable with the subsea housing. 56. The system of claim 55, further comprising a seal, and the subsea housing further comprising: a first side opening; and a second side opening spaced apart from the first side opening, wherein the seal is disposed between the first side opening and the second side opening. 57. The system of claim 56, wherein the bearing assembly is disposed below the seal. 58. The system of claim 56, wherein the bearing assembly is disposed above the seal. 59. The system of claim 53, further comprising a subsea housing, wherein the bearing assembly is connected with the holding member assembly so that the bearing assembly is supported by the subsea housing. 60. The system of claim 59, wherein the holding member disengages from the subsea housing at a predetermined upward pressure on the holding member assembly. 61. The system of claim 59, further comprising: a running tool for positioning the bearing assembly with the subsea housing, the running tool comprising: a latching member for latching with the holding member assembly. 62. The system of claim 61, wherein the pipe is rotated in a first direction, and wherein the running tool disengages from the holding member assembly when the pipe is rotated in a direction rotationally opposite to the first direction. 63. The system of claim 53, the internal housing further comprising: an upper annular portion; a lower annular portion, movable relative to the upper annular portion; and an elastomer positioned between the upper annular portion and the lower annular portion. 64. The system of claim 63, wherein the holding member chamber is defined by the lower annular portion. 65. The system of claim 63, wherein extension of the extendible portion moves the upper annular portion toward the lower annular portion while the holding member moves to the extended position, thereby extruding the elastomer. 66. The system of claim 65, wherein the upper annular portion having a shoulder; and the extendible portion having a shoulder, the extendible portion shoulder engaging with the upper annular portion shoulder to move the upper annular portion toward the lower annular portion. 67. The system of claim 63, further comprising: an upper dog member positioned with the upper annular portion; and an upper dog recess defined in the extendible portion, wherein upper dog member releasably engages with the upper dog recess. 68. The system of claim 67, wherein the upper dog member and the upper dog recess interengage the extendible portion with the upper annular portion. 69. The system of claim 67, wherein the upper dog member and the upper dog recess release the extendible portion from the upper annular portion at a predetermined force. 70. The system of claim 63, further comprising: a lower dog member positioned with the lower annular portion; and a lower dog recess defined in the extendible portion, wherein the lower dog member releasably engages with the lower dog recess. 71. The system of claim 70, wherein the lower dog member and the lower dog recess interengage the extendible portion with the lower annular portion. 72. The system of claim 71, the lower annular portion further comprising: an end portion connected to the lower annular portion. 73. The system of claim 63, the extendible portion further comprising: a running tool bell landing portion. 74. The system of claim 53, wherein an outer surface of the extendible portion blocks the holding member radially outward. 75. The system of claim 53, wherein the holding member assembly further comprising: a running tool bell landing portion; and the system further comprising a running tool, comprising: a bell portion engageable with the running tool bell landing portion. 76. The system of claim 53, the bearing assembly further comprising: a seal sealably engaging the pipe in the passage. 77. The system of claim 53, the bearing assembly further comprising: a plurality of bearings; and a pressure compensation mechanism adapted to automatically provide fluid pressure to the plurality of bearings, comprising: an upper chamber in fluid communication with the plurality of bearings; a lower chamber in fluid communication with the plurality of bearings; an upper spring-loaded piston forming one wall of the upper chamber; and a lower spring-loaded piston forming one wall of the lower chamber. 78. The system of claim 77, the pressure compensation mechanism further comprising: an upper chamber fill pipe communicating with the upper spring-loaded piston. 79. The system of claim 53, the bearing assembly comprising: a pressure relief mechanism. 80. The system of claim 79, the pressure relief mechanism comprising: a first pressure relief mechanism having an open position and a closed position, the first pressure relief mechanism changing to the open position when a first fluid pressure inside the holding member assembly exceeds a second fluid pressure outside the holding member assembly. 81. The system of claim 80, the first pressure relief mechanism further comprising: a slidable member having a passage therethrough for allowing fluid flow through the passage when in the open position, the open position aligning the slidable member passage with a passage through the holding member assembly; and a spring adapted to urge the slidable member to the closed position. 82. The system of claim 81, the pressure relief mechanism comprising: a second annular slidable member moving between a closed position and an open position, the second slidable member sliding to the open position when a first fluid pressure outside the holding member assembly exceeds a second fluid pressure inside the slidable member assembly. 83. The system of claim 82, further comprising: a spring adapted to urge the slidable member to the closed position, wherein the slidable member has a passage therethrough for allowing fluid flow through the passage when in the open position. 84. A method of controlling pressure in a subsea tubular, comprising the steps of: positioning the subsea tubular above a borehole; positioning a holding member assembly with the subsea tubular; sealing the holding member assembly with the subsea tubular; and opening a pressure relief valve of the holding member assembly when a borehole pressure exceeds the fluid pressure within the subsea tubular by a predetermined pressure. 85. The method of claim 84, the step of positioning the holding member assembly comprising the step of: reducing surging by allowing fluid passage through the holding member assembly while positioning the holding member assembly. 86. The method of claim 84, further comprising the step of: engaging the holding member assembly with a formation on the subsea tubular. 87. The method of claim 86, the step of engaging comprising the step of: rotating the holding member assembly into the formation in a first rotational direction. 88. The method of claim 87, further comprising the step of: rotating the holding member assembly in a second rotational direction to unlatch the holding member assembly from the formation, the second rotational direction rotationally opposite to the first rotational direction. 89. A method of positioning a rotating control head with a subsea housing, comprising the steps of: connecting a holding member assembly to the rotating control head; forming an internal formation in the subsea housing; retracting a holding member into an internal housing of the holding member assembly; positioning the rotating control head with the subsea housing; and engaging the holding member assembly with the subsea housing by radially extending the holding member outwardly towards the internal formation. 90. The method of claim 89, the step of connecting a holding member assembly comprising the step of: threading the holding member assembly with the rotating control head. 91. The method of claim 89, further comprising the steps of: positioning an elastomer between an upper portion of the internal housing and a lower portion of the internal housing; and extruding the elastomer radially outwardly, sealing the holding member assembly with the subsea housing. 92. The method of claim 91, the step of extruding comprising the step of: compressing the elastomer between the upper portion and lower portion. 93. The method of claim 91, further comprising the step of: dogging the lower portion of the internal housing with an extendible portion when the extendible portion is in an extended position. 94. The method of claim 93, further comprising the steps of: retracting the extendible portion; undogging the lower portion of the internal housing from the extendible portion upon retracting; and decompressing the elastomer to unseal the holding member assembly from the subsea housing. 95. The method of claim 91, further comprising the steps of: retracting an extendible portion; unblocking the holding member; and disengaging the holding member from the internal formation. 96. The method of claim 89, further comprising the step of: blocking the holding member radially outwardly with an extendible portion when the extendible portion is in an extended position. 97. The method of claim 89, further comprising the step of: disengaging the holding member when applying a predetermined force to the holding member. 98. The method of claim 89, further comprising the step of: configuring a pressure relief assembly with the holding member assembly. 99. The method of claim 98, the step of configuring comprising the steps of: providing fluid communication via a first passage through the internal housing; and opening the first passage if fluid pressure exceeds a borehole pressure by a first predetermined pressure. 100. The method of claim 99, the step of configuring further comprising the steps of: providing fluid communication via a second passage through the outer portion of the internal housing; and opening the second passage if borehole pressure exceeds fluid pressure by a predetermined amount. 101. A system for use in a rotating control head assembly having a bearing, the system comprising: a pressure compensation mechanism adapted to automatically provide fluid pressure to the bearing, comprising: a first chamber in fluid communication with the bearing; a second chamber in fluid communication with the bearing; a first biased barrier forming one wall of the first chamber and adapted to compress a fluid within the first chamber; and a second biased barrier forming one wall of the second chamber and adapted to compress the fluid within the second chamber. 102. The system of claim 101, the pressure compensation mechanism further comprising: a first chamber fill pipe communicating with the first biased barrier, wherein a first end of the first chamber fill pipe is accessible through an opening in the side of the rotating control head assembly. 103. A system for positioning a rotating control head assembly within a subsea housing, the system comprising: means for providing a bearing fluid pressure; and means integral with the rotating control head assembly for increasing the bearing fluid pressure by a predetermined amount above the higher of the subsea housing fluid pressure or the borehole pressure. 104. A subsea housing system, the system comprising: a holding member connected to a rotating control head assembly, and an annular formation on the subsea housing for interengaging and direct contact with the holding member without regard to a rotational position of the holding member. 105. The system of claim 104, the annular formation comprising: a plurality of recesses configured to cooperatively interengage with a plurality of protuberances of the holding member. 106. The system of claim 105, wherein the plurality of recesses are identical. 107. The system of claim 105, wherein the plurality of recesses are configured to allow the holding member assembly to disengage from the annular formation at a predetermined force. 108. A rotating control head system, the system comprising: a bearing assembly having a passage sized to receive a rotatable pipe; and a bearing assembly seal sealably engaging the rotatable pipe in the passage; a holding member assembly connected to the bearing assembly, comprising: an internal housing, comprising: a holding member. 109. The system of claim 108, wherein the holding member assembly is threadedly connected to the bearing assembly. 110. The system of claim 108, further comprising a subsea housing, wherein the holding member assembly is releasably positionable with the subsea housing. 111. The system of claim 110, the subsea housing comprising: a first side opening; and a second side opening spaced apart from the first side opening, wherein an internal formation is disposed between the first side opening and the second side opening for receiving the holding member. 112. The system of claim 111, wherein the bearing assembly is disposed below the internal formation. 113. The system of claim 111, wherein the bearing assembly is disposed above the internal formation. 114. The system of claim 110, wherein the holding member disengages from the subsea housing at a predetermined upward pressure on the holding member assembly. 115. The system of claim 110, further comprising: a running tool for positioning the bearing assembly with the subsea housing, and; the running tool having a latching member for latching with the holding member assembly. 116. The system of claim 115, wherein the rotatable pipe is rotated in a first direction, and wherein the running tool disengages from the holding member assembly when the rotatable pipe is rotated in a direction rotationally opposite to the first direction. 117. The system of claim 108, further comprising a subsea housing, wherein the bearing assembly is connected with the holding member assembly so that the bearing assembly is connected with the subsea housing. 118. The system of claim 108, the bearing assembly comprising: a pressure relief mechanism. 119. The system of claim 118, the pressure relief mechanism comprising: a first pressure relief mechanism having an open position and a closed position, the first pressure relief mechanism changing to the open position when a first fluid pressure inside the holding member assembly exceeds a second fluid pressure outside the holding member assembly. 120. A rotating control head system adapted for use with a pipe, the system comprising: a bearing assembly having a passage sized to receive the pipe; a holding member assembly connected to the bearing assembly, the holding member assembly comprising: an internal housing having a holding member; and a running tool bell landing portion; and a running tool having a bell portion engageable with the running tool bell landing portion. 121. A rotating control head system adapted for use with a pipe, the system comprising: a bearing assembly having a passage sized to receive the pipe; a holding member assembly connected to the bearing assembly, the holding member assembly comprising: an internal housing having a holding member; and the bearing assembly further comprising: a bearing; and a pressure compensation mechanism adapted to automatically provide fluid pressure to the bearing, comprising: a first chamber in fluid communication with the bearing; a second chamber in fluid communication with the bearing; a first piston forming one wall of the first chamber; and a second piston forming one wall of the second chamber. 122. A system for forming a borehole using a rotatable pipe, the system comprising: a first housing disposed above the borehole; a bearing assembly having an inner member and an outer member and being positioned with said first housing, said inner member rotatable relative to said outer member and having a passage through which the rotatable pipe may extend; a bearing assembly seal to sealably engage the rotatable pipe with said bearing assembly; and a holding member for positioning said bearing assembly with said first housing. 123. A system for forming a borehole using a rotatable pipe, the system comprising: a first housing disposed above the borehole; a bearing assembly having an inner member and an outer member and being removably positioned with said first housing, said inner member rotatable relative to said outer member and having a passage through which the rotatable pipe may extend; a bearing assembly seal to sealably engage the rotatable pipe; a holding member for removably positioning said bearing assembly with said first housing; and a first housing seal disposed in said first housing, said bearing assembly sealed with said first housing by said first housing seal. 124. A system for forming a borehole in a floor of an ocean, the system comprising: a lower tubular adapted to be fixed relative to the floor of the ocean; a first housing disposed above said lower tubular; a bearing assembly having an inner member and an outer member and being removably positioned with said first housing, said inner member rotatable relative to said outer member and having a passage; a bearing assembly seal disposed with said inner member; an internal housing having a holding member, said internal housing receiving said bearing assembly, said holding member extending from said internal housing and into said first housing; and a first housing seal disposed in said first housing, said first housing seal movable between a sealed position and an open position, whereby said internal housing seals with said first housing seal when said first housing seal is in the sealed position. 125. A method for managing the pressure of a fluid in a borehole while sealing a rotatable pipe, comprising the steps of: positioning a first housing above the borehole; holding a bearing assembly having an inner member and an outer member with said first housing; sealing said bearing assembly with the rotatable pipe; and sealing said first housing with said bearing assembly to manage the pressure of the fluid in the borehole while limiting upward movement of said bearing assembly relative to said first housing; and wherein said inner member is rotatable relative to said outer member, and wherein said inner member has a passage through which the rotatable pipe may extend. 126. A rotating control head system for use with a rotatable pipe, the system comprising: an outer member; an inner member disposed within said outer member, said inner member having a passage to receive and sealingly engage the rotatable pipe; a plurality of bearings disposed between said outer member and said inner member to rotate said inner member relative to said outer member when the inner member is sealingly engaged with the rotatable pipe; a first housing disposed above said borehole, said first housing having a seal for sealing with said outer member; and a holding member for limiting positioning of said outer member with said first housing. 127. A method for drilling a borehole, comprising the steps of: positioning a first housing above the borehole; positioning a rotating control head with said first housing; extending a rotatable pipe through said rotating control head and into the borehole; sealing said rotating control head with said first housing with a seal that limits upward movement of said rotating control head relative to said first housing; and sealing an inner member of said rotating control head to said rotatable pipe, said inner member rotating with said rotatable pipe relative to an outer member. 128. A system for forming borehole using a rotatable pipe and a fluid, the system comprising: a first housing having a bore running therethrough; a bearing assembly disposed with said bore, said bearing assembly comprising an inner member and an outer member for rotatably supporting said inner member, said inner member being adapted to slidingly receive and sealingly engage the rotatable pipe, wherein rotation of the rotatable pipe rotates said inner member within said bore; a holding member for positioning said bearing assembly with said first housing; and a seal disposed in an annular cavity in said first housing, said seal having an elastomeric element for sealingly engaging said bearing assembly with said first housing. 129. A rotating control head system, the system comprising: a housing having a bore running therethrough; a bearing assembly disposed with said bore, said bearing assembly comprising an inner member and an outer member for rotatably supporting said inner member, said inner member being adapted to slidingly receive and sealingly engage the rotatable pipe, wherein rotation of the rotatable pipe rotates said inner member within said bore, the inner member having thereon a sealing element; a holding member for positioning said bearing assembly with said first housing; and a seal disposed in said housing for securing said bearing assembly to said housing. 130. A system for use in a rotating control head assembly having a bearing, wherein the assembly is in fluid communication with an external fluid pressure, the system comprising: a pressure compensation mechanism to provide a fluid pressure to the bearing relative to the external fluid pressure comprising: a first chamber in fluid communication with the bearing; a second chamber in fluid communication with the external fluid pressure; and a first barrier to separate the fluid pressure within the first chamber and the external fluid pressure wherein the first chamber and second chamber are integral with the rotating control head assembly. 131. The system of claim 130 wherein the first chamber having a hydraulic fluid. 132. The system of claim 130 wherein said second chamber including an urging member to urge said first barrier. 133. The system of claim 132 wherein said urging member providing a pressure to said first barrier in addition to the external fluid pressure. 134. The system of claim 133 wherein the urging member is a spring. 135. The system of claim 130 wherein the first chamber has a fluid pressure greater than the external fluid pressure independent of hydraulic connections with the rotating control head assembly. 136. The system of claim 135 wherein the fluid pressure to the bearing is greater than the external fluid pressure. 137. The system of claim 130 wherein said external fluid pressure is a borehole fluid pressure. 138. The system of claim 130 wherein said external fluid pressure is a seawater fluid pressure. 139. A method for maintaining a bearing fluid pressure on a bearing in a rotating control head assembly, comprising the steps of: positioning the rotating control head assembly above a borehole having a borehole fluid pressure; communicating the borehole fluid pressure to the rotating control head assembly; communicating the bearing fluid pressure to the bearing; separating the borehole fluid pressure from the bearing fluid pressure; and urging the bearing fluid pressure to a pressure different from the borehole fluid pressure wherein the urging member is integral with the rotating control head assembly. 140. The method of claim 139, wherein the step of urging the bearing fluid pressure comprises urging the bearing fluid pressure higher than the borehole fluid pressure. 141. The method of claim 140, wherein at least one of the steps of urging the bearing fluid pressure comprises a mechanical urging member. 142. The method of claim 140, wherein the step of urging the bearing fluid pressure comprises urging the bearing fluid pressure higher than the third fluid pressure. 143. The method of claim 140, wherein the steps of urging the bearing fluid pressure comprises urging the bearing fluid pressure higher than higher of the borehole fluid pressure or the third fluid pressure. 144. The method of claim 140, wherein the third fluid pressure is pressure from sea water. 145. The method of claim 139, further comprising the steps of: communicating a third fluid pressure to the rotating control head assembly; separating the third fluid pressure from the bearing fluid pressure; and urging the bearing fluid pressure to a pressure different from the third fluid pressure. 146. The method of claim 139, wherein the step of urging the bearing fluid pressure comprises an urging member integral with the rotating control head assembly. 147. The method of claim 146, wherein the integral urging member is independent of hydraulic connections with the rotating control head assembly. 148. A method for managing the pressure of a fluid in a borehole while sealing a rotatable pipe, comprising the steps of: positioning a housing above the borehole; positioning a tubular above the housing; moving a plurality of bearings on an outer member of a rotating control device in the tubular, the outer member being adapted to receive an inner member having a passage through which the rotatable pipe may extend, the inner member adapted to rotate relative to the outer member; holding the outer member to limit movement relative to the housing; and sealing the housing with the outer member with a seal movable between an open position and a sealed position. 149. The method of claim 148 further comprising the step of: blocking movement of the outer member relative to the housing. 150. The method of claim 149 wherein the step of sealing the housing is performed after the step of blocking movement of the outer member. 151. The method of claim 148 further comprising the step of: supporting the outer member on a tool as the outer member is moved in the tubular. 152. The method of claim 151 wherein the tool is a drill collar. 153. The method of claim 151 wherein the tool is a stabilizer. 154. The method of claim 151 wherein the tool having a bell portion and the outer member having a bell landing portion to engage the tool bell portion upon rotation of the tool. 155. The method of claim 148 wherein the step of sealing the housing comprises the step of: moving an annular seal between a sealed position and an open position. 156. The method of claim 148 wherein the steps of holding the outer member and sealing the housing comprise the step of: moving the seal from an open position to a sealed position. 157. The method of claim 156 further comprising an internal housing wherein the internal housing is attached to the outer member and the seal is sealed on the internal housing. 158. The method of claim 156 further comprising the step of: moving a piston in the housing from a closed position to an open position to open an outlet in the housing while sealing the housing and holding the outer member. 159. The method of claim 148 wherein the tubular is a riser. 160. The method of claim 148 wherein the outer member is attached to an internal housing. 161. The method of claim 160 wherein the internal housing having a holding member. 162. The method of claim 148 further comprising the step of: moving a piston in the housing from a closed position to an open position to open an outlet in the housing while sealing the housing. 163. A system for managing the pressure of a fluid in a borehole while sealing a rotatable pipe, comprising: a housing positioned above the borehole; a tubular positioned above the housing; an outer member of a rotating control device sized to be moved in the tubular, the outer member adapted to receive an inner member having a passage through which the rotatable pipe may extend, the inner member adapted to rotate relative to the outer member; a plurality of bearings on the outer member of the rotating control device; a holding member to limit movement of the outer member relative to the housing; and a seal movable between an open position and a sealed position for sealing the housing with the outer member. 164. The system of claim 163 further comprising a blocking shoulder to block movement of the outer member relative to the housing. 165. The system of claim 164 wherein the seal moving from an open position to a sealed position after the outer member is blocked from movement relative to the housing. 166. The system of claim 163 further comprising a tool for moving the outer member in the tubular. 167. The system of claim 166 wherein the tool is a drill collar. 168. The system of claim 166 wherein the tool is a stabilizer. 169. The system of claim 166 wherein the tool having a bell portion and the outer member having a bell landing portion to engage the tool bell portion upon rotation of the tool. 170. The system of claim 163 wherein the seal for sealing the housing comprises an annular seal movable between a sealed position and an open position. 171. The system of claim 163 wherein the seal for sealing the housing comprises an annular seal movable from an open position to a sealed position. 172. The system of claim 163 further comprising an internal housing having the holding member and wherein the internal housing is attached to the outer member. 173. The system of claim 172 further comprising: an outlet in the housing; and a piston movable in the housing from a closed position to an open position to open the outlet in the housing while sealing the housing with the internal housing. 174. The system of claim 163 wherein the tubular is a riser. 175. The system of claim 163 further comprising an internal housing wherein the outer member is attached to the internal housing. 176. The system of claim 175 wherein the internal housing having the holding member to limit movement. 177. The system of claim 163 further comprising: an outlet in the housing; and a piston movable in the housing from a closed position to an open position to open the outlet in the housing while sealing the housing.
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