Wellhead completion assembly capable of versatile arrangements
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-033/04
E21B-033/03
출원번호
US-0843197
(2010-07-26)
등록번호
US-9140092
(2015-09-22)
발명자
/ 주소
Cain, Brandon Matthew
Travis, Todd
Bilyeu, Michael L.
Altman, Gordon Ronnie
Willard, Steve
Davidson, Carl Edwin
Rogers, John A.
Menard, Robert Scott
출원인 / 주소
Weatherford Technology Holdings, LLC
대리인 / 주소
Blank Rome LLP
인용정보
피인용 횟수 :
0인용 특허 :
22
초록▼
A wellhead completion assembly has a head connected to surface casing. A rotatable flange or the like can be used to connect various components to a threaded end of the head. A casing hanger installs in the head, and the hanger's upper end extends beyond the head's top edge. This exposed end has an
A wellhead completion assembly has a head connected to surface casing. A rotatable flange or the like can be used to connect various components to a threaded end of the head. A casing hanger installs in the head, and the hanger's upper end extends beyond the head's top edge. This exposed end has an external threaded connection to connect to various wellhead components using a rotatable flange or the like. For example, a locking ring can threadably connect to the head's threaded end to support the hanger in the head. Then, a rotatable flange can threadably connect to the hanger's exposed end so that another component, such as a completion spool or gate valve, can nippled up directly to the hanger. When the hanger is fluted, a pack-off assembly can allow testing off inner and outer sealing integrity via a test port accessible through an opening in the locking ring.
대표청구항▼
1. A wellhead assembly, comprising: a casing head connecting to casing at a wellhead, the casing head having an internal surface and having a first connection disposed on the casing head;a casing hanger disposing in the casing head, the casing hanger having an external surface and having a distal en
1. A wellhead assembly, comprising: a casing head connecting to casing at a wellhead, the casing head having an internal surface and having a first connection disposed on the casing head;a casing hanger disposing in the casing head, the casing hanger having an external surface and having a distal end, the distal end extending beyond the casing head and having a second connection disposed on the distal end, the second connection for connecting at least one component above the casing hanger;a pack-off plate disposing about the casing hanger and having an inner surface, an outer surface, and an upper surface, the upper surface defining a test port, the inner surface sealably engaging the external surface of the casing hanger, the outer surface sealably engaging the internal surface of the casing head; anda head ring connecting to the first connection of the casing head, the head ring engaging the upper surface of the pack-off plate and defining an opening through which the distal end of the casing hanger extends,wherein the test port is accessible through the opening in the head ring and communicates with the sealed engagement between the inner and external surfaces or between the outer and internal surfaces. 2. The assembly of claim 1, wherein the first connection comprises a first thread disposed about an external surface of the casing head, and wherein the second connection comprises a second thread disposed about the external surface on the distal end of the casing hanger. 3. The assembly of claim 1, wherein the pack-off plate comprises: a pair of seals disposed on the inner surface and engaging the external surface of the casing hanger;wherein the test port defined in the upper surface and accessible through the opening in the head ring communicates between the pair of seals on the pack-off plate. 4. The assembly of claim 1, wherein the pack-off plate comprises: a pair of seals disposed on the outer surface and engaging the internal surface of the casing head;wherein the test port defined in the upper surface and accessible through the opening in the head ring communicates with the pair of seals on the pack-off plate. 5. The assembly of claim 1, wherein the casing head comprises a single-bowl arrangement defining an internal shoulder within an internal bore, the casing hanger supported by the internal shoulder. 6. The assembly of claim 1, wherein the casing head comprises a double-bowl arrangement defining an internal shoulder within an internal bore, the casing hanger disposing on one or more components supported by the internal shoulder. 7. The assembly of claim 1, wherein the casing hanger defines a shoulder, wherein the head ring defines a surface adjacent the opening, and wherein the pack-off plate engages between the shoulder and the surface. 8. The assembly of claim 1, wherein the casing hanger defines at least one flute, and wherein the pack-off plate seals fluid communication through the at least one flute. 9. The assembly of claim 1, wherein the casing hanger defines an external thread disposed thereabout, and wherein the pack-off plate threadably connects on the external thread. 10. The assembly of claim 1, further comprising a sealing ring disposing about the external surface of the casing hanger, wherein the pack-off plate comprises a lip wedging between the sealing ring and the external surface of the casing hanger. 11. A wellhead assembly, comprising: a first casing head connecting at one end to casing at a wellhead and defining a first shoulder therein, the first casing head having a first external threaded connection at another end;one or more second casing heads each having a first internal threaded connection at one end and each having a second external threaded connection at another end;a casing hanger disposing in the assembly and having a distal end with a fourth connection for connecting to at least one component above the casing hanger; anda head ring connecting to the assembly and defining an opening through which the distal end of the casing hanger extends,wherein in a single-bowl arrangement, the first casing head connects independently to the casing at the wellhead, the casing hanger disposes in the first casing head, and the head ring connects to the first external threaded connection of the first casing head and has the distal end of the casing hanger extending through the opening; andwherein in one or more multiple-bowl arrangements, the first casing head connects to the casing, and the first internal threaded connection of at least one of the one or more second casing heads threads onto the first external threaded connection of the first casing head. 12. The assembly of claim 11, wherein the first internal threaded connection on each of the one or more second casing heads is configured to thread onto the first external threaded connection of the first casing head and is configured to thread onto the second external threaded connections of the one or more second casing heads. 13. The assembly of claim 11, wherein in the single-bowl arrangement, the casing hanger is supported by the first shoulder in the first casing head and has the distal end extending beyond the end thereof. 14. The assembly of claim 11, wherein in the one or more multiple-bowl arrangements, the casing hanger disposes in an uppermost of the one or more second casing heads, and the head ring threads onto the second external threaded connection of the uppermost of the one or more second casing heads and has the distal end of the casing hanger extending through the opening. 15. The assembly of claim 14, wherein in the one or more multiple-bowl arrangements, the assembly further comprises one or more pack-off components supported by the first shoulder in the first casing head, the casing hanger being supported by the one or more pack-off components and having the distal end extending beyond the uppermost of the one or more second casing heads. 16. The assembly of claim 11, wherein a portion of the head ring directly engages a second shoulder of the casing hanger, and wherein the casing hanger comprises: a pair of seals on an outer surface for engaging a casing head sidewall, anda test port defined in the second shoulder and accessible through the opening in the head ring, the test port communicating between the pair of seals. 17. The assembly of claim 11, further comprising a pack-off plate disposing between the casing hanger and the head ring, the pack-off plate having an inner portion sealing against the casing hanger, the pack-off plate having an outer portion sealing against a casing head sidewall. 18. The assembly of claim 17, wherein the pack-off plate comprises: a pair of first seals on the outer portion;a pair of second seals on the inner portion; anda test port defined in an upper surface and accessible through the opening in the head ring, the test port communicating with the inner and outer portions between the first and second seals. 19. A wellhead assembly, comprising: a first casing head connecting at one end to casing at a wellhead and defining a first shoulder therein, the first casing head having a first connection at another end; andone or more second casing heads each having a second connection at one end and each having a third connection at another end;a casing hanger disposing in the assembly and having a distal end with a fourth connection for connecting to at least one component above the casing hanger; anda head ring connecting to the assembly and defining an opening through which the distal end of the casing hanger extends,wherein in a single-bowl arrangement, the first casing head connects independently to the casing at the wellhead without the one or more second casing heads, whereby the casing hanger disposes in the first casing head, and whereby the head ring connects to the first connection of the first casing head and has the distal end of the casing hanger extending through the opening, andwherein in one or more multiple-bowl arrangements, the first casing head connects to the casing, and the second connection of at least one of the one or more second casing heads connects to the first connection of the first casing head, whereby the casing hanger disposes in an uppermost of the one or more second casing heads, and whereby the head ring connects to the third connection of the uppermost of the one or more second casing heads and has the distal end of the casing hanger extending through the opening. 20. The assembly of claim 19, wherein in the single-bowl arrangement, the casing hanger is supported by the first shoulder in the first casing head and has the distal end extending beyond the end thereof. 21. The assembly of claim 19, wherein in the one or more multiple-bowl arrangements, the assembly further comprises one or more pack-off components supported by the first shoulder in the first casing head, the casing hanger being supported by the one or more pack-off components and having the distal end extending beyond the uppermost of the one or more second casing heads. 22. The assembly of claim 19, wherein a portion of the head ring directly engages a second shoulder of the casing hanger, and wherein the casing hanger comprises: a pair of seals on an outer surface for engaging a casing head sidewall, anda test port defined in the second shoulder and accessible through the opening in the head ring, the test port communicating between the pair of seals. 23. The assembly of claim 19, further comprising a pack-off plate disposing between the casing hanger and the head ring, the pack-off plate having an inner portion sealing against the casing hanger, the pack-off plate having an outer portion sealing against a casing head sidewall. 24. The assembly of claim 23, wherein the pack-off plate comprises: a pair of first seals on the outer portion;a pair of second seals on the inner portion; anda test port defined in an upper surface and accessible through the opening in the head ring, the test port communicating with the inner and outer portions between the first and second seals. 25. The assembly of claim 19, wherein the second connection on each of the one or more second casing heads is configured to connect to the first connection of the first casing head and is configured to connect to the third connections of the one or more second casing heads. 26. A wellhead assembly method, comprising: disposing a casing hanger in a casing head at a wellhead with a first end of the casing hanger extending beyond a second end of the casing head;disposing a pack-off plate on the first end of the casing hanger;sealing the pack-off plate between the casing hanger and the casing head by sealably engaging an inner surface of the pack-off plate with an external surface of the casing hanger and by sealably engaging an outer surface of the pack-off plate with an internal surface of the casing head;disposing the first end of the casing hanger through an opening in a head ring;connecting the head ring on the second end of the casing head with the first end of the casing hanger extending through the opening of the head ring; andleaving a test port in an upper surface of the pack-off plate accessible through the opening in the head ring, the test port communicating with the sealed engagement between the inner and external surfaces or between the outer and internal surfaces. 27. The method of claim 26, comprising initially connecting the casing head to surface casing. 28. The method of claim 26, wherein disposing the pack-off plate on the first end of the casing hanger comprises threading the pack-off plate on an external thread of the casing hanger. 29. The method of claim 26, wherein disposing the pack-off plate on the first end of the casing hanger comprises sealing an inner pair of seals on the inner surface of the pack-off plate against the external surface of the casing hanger and sealing an outer pair of seals on the outer surface of the pack-off plate against the internal surface of the casing head. 30. The method of claim 29, further comprising testing the inner and outer pairs of seals via the test port defined in the upper surface of the pack-off plate and accessible through the opening in the head ring. 31. The method of claim 26, wherein disposing the pack-off plate on the first end of the casing hanger comprises: wedging a lip on the pack-off plate between a hanger ring and the external surface of the casing hanger, andengaging the hanger ring against the internal surface of the casing head. 32. The method of claim 26, further comprising connecting an additional component above the first end of the casing hanger. 33. The method of claim 32, wherein connecting an additional component above the first end of the casing hanger comprises disposing a connector to the first end of the casing hanger; and connecting the additional component with the connector. 34. A wellhead assembly, comprising: a casing head connecting to casing at a wellhead and having at least two head components interconnecting end-to-end to extend one from another, a first of the at least two head components having an internal shoulder therein, a second of the at least two head components having a first external connection disposed thereon;a casing hanger disposing in the casing head and having a distal end, the distal end extending beyond the second of the at least two head components and having a second external connection disposed thereon, the second external connection for connecting at least one component above the casing hanger;a pack-off plate disposing about the casing hanger and sealably engaging between the casing hanger and the casing head; anda head ring connecting to the first external connection of the second of the at least two head components, the head ring engaging the pack-off plate and defining an opening through which the distal end of the casing hanger extends. 35. The assembly of claim 34, wherein the first external connection comprises a first thread disposed about an external surface of the second of the at least two head components, and wherein the second external connection comprises a second thread disposed about an external surface on the distal end of the casing hanger. 36. The assembly of claim 34, wherein the pack-off plate comprises: a pair of seals disposed on an inner portion and engaging an external surface of the casing hanger; anda test port defined in an upper surface and accessible through the opening in the head ring, the test port communicating between the pair of seals on the pack-off plate. 37. The assembly of claim 34, wherein the pack-off plate comprises: a pair of seals disposed on an outer portion and engaging an internal surface of the casing head; anda test port defined in an upper surface and accessible through the opening in the head ring, the test port communicating with the pair of seals on the pack-off plate. 38. The assembly of claim 34, wherein the casing head is supported by the internal shoulder. 39. The assembly of claim 38, wherein one or more components disposed in the casing head support the casing hanger on the internal shoulder. 40. The assembly of claim 34, wherein the first of the at least two head components connects to the casing and has a second external connection disposed thereon, and wherein the second of the at least two head components has an internal connection disposed at one end and has the first external connection disposed at another end, the internal connection connecting to the second external connection on the first of the at least two head components. 41. The assembly of claim 34, wherein the casing hanger defines a shoulder, wherein the head ring defines a surface adjacent the opening, and wherein the pack-off plate engages between the shoulder and the surface. 42. The assembly of claim 34, wherein the casing hanger defines at least one flute, and wherein the pack-off plate seals fluid communication through the at least one flute. 43. The assembly of claim 34, wherein the casing hanger defines an external thread disposed thereabout, and wherein the pack-off plate threadably connects on the external thread. 44. The assembly of claim 34, further comprising a sealing ring disposing about an external surface of the casing hanger, wherein the pack-off plate comprises a lip wedging between the sealing ring and the external surface of the casing hanger. 45. A wellhead assembly, comprising: a first casing head connecting at one end to casing at a wellhead and defining a first shoulder therein, the first casing head having a first external threaded connection at another end;one or more second casing heads each having a first internal threaded connection at one end and each having a second external threaded connection at another end;a casing hanger disposing in the assembly and having a distal end with a fourth connection for connecting to at least one component above the casing hanger; anda head ring connecting to the assembly and defining an opening through which the distal end of the casing hanger extends,wherein in a single-bowl arrangement, the first casing head connects independently to the casing at the wellhead; andwherein in the one or more multiple-bowl arrangements, the first casing head connects to the casing, the first internal threaded connection of at least one of the one or more second casing heads threads onto the first external threaded connection of the first casing head, the casing hanger disposes in an uppermost of the one or more second casing heads, and the head ring connects to the second external threaded connection of the uppermost of the one or more second casing heads and has the distal end of the casing hanger extending through the opening. 46. The assembly of claim 45, wherein the first internal threaded connection on each of the one or more second casing heads is configured to thread onto the first external threaded connection of the first casing head and is configured to thread onto the second external threaded connections of the one or more second casing heads. 47. The assembly of claim 45, wherein in the single-bowl arrangement, the casing hanger is supported by the first shoulder in the first casing head and has the distal end extending beyond the end thereof. 48. The assembly of claim 45, wherein a portion of the head ring directly engages a second shoulder of the casing hanger, and wherein the casing hanger comprises: a pair of seals on an outer surface for engaging a casing head sidewall, anda test port defined in the second shoulder and accessible through the opening in the head ring, the test port communicating between the pair of seals. 49. The assembly of claim 45, further comprising a pack-off plate disposing between the casing hanger and the head ring, the pack-off plate having an inner portion sealing against the casing hanger, the pack-off plate having an outer portion sealing against a casing head sidewall. 50. The assembly of claim 49, wherein the pack-off plate comprises: a pair of first seals on the outer portion;a pair of second seals on the inner portion; anda test port defined in an upper surface and accessible through the opening in the head ring, the test port communicating with the inner and outer portions between the first and second seals.
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이 특허에 인용된 특허 (22)
McGuire,Bob; Dallas,L. Murray, Adapters for double-locking casing mandrel and method of using same.
Brammer Norman (Fyvie Turiff GB6) Dinnes Calum J. B. (Aberdeen GB6) Hosie Stanley (Peterhead GB6) Park Trevor W. J. (Aberdeen GB6), Adjustable surface well head casing hanger.
Baten, Robert B.; Skeels, Harold B.; MacFarlane, David; McBeth, Russell E.; Wester, Randy J.; Smedley, Marcus A., Nested stack-down casing hanger system for subsea wellheads.
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