Measurement while drilling fluid pressure pulse generator
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-047/18
E21B-047/14
F16D-001/112
E21B-017/042
E21B-047/01
F16D-001/10
출원번호
US-0440189
(2013-11-06)
등록번호
US-9500075
(2016-11-22)
국제출원번호
PCT/CA2013/050849
(2013-11-06)
국제공개번호
WO2014/071519
(2014-05-15)
발명자
/ 주소
Logan, Aaron W.
Logan, Justin C.
출원인 / 주소
Evolution Engineering Inc.
대리인 / 주소
Seed IP Law Group LLP
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
A coupling key for fixedly coupling a driveshaft to a rotating component of a measurement while drilling telemetry apparatus comprises a key body and at least one zero backlash ring. The key body has dimensions selected to fit within a keyhole of a driveshaft and a receptacle of a rotating component
A coupling key for fixedly coupling a driveshaft to a rotating component of a measurement while drilling telemetry apparatus comprises a key body and at least one zero backlash ring. The key body has dimensions selected to fit within a keyhole of a driveshaft and a receptacle of a rotating component, with a gap that is large enough that the key body can be freely inserted into the keyhole and receptacle and small enough that the coupling body can couple the driveshaft to the rotating component in a rotational direction. The least one zero backlash ring extends around the key body and protrudes from surfaces of the key body and into the gap such that an interference fit is established between the coupling key, the keyhole, and the receptacle when the coupling key is coupling the driveshaft and rotating component together.
대표청구항▼
1. A coupling key for fixedly coupling a driveshaft to a rotating component of a measurement while drilling telemetry apparatus, the driveshaft having a keyhole configured to receive a portion of the coupling key and comprising a bore extending from a side of the driveshaft and at least partially th
1. A coupling key for fixedly coupling a driveshaft to a rotating component of a measurement while drilling telemetry apparatus, the driveshaft having a keyhole configured to receive a portion of the coupling key and comprising a bore extending from a side of the driveshaft and at least partially through the driveshaft, and the rotating component having a receptacle configured to axially receive the driveshaft and a portion of the coupling key protruding outwardly from the driveshaft keyhole, the coupling key comprising: a key body having dimensions selected to fit within the keyhole and receptacle with a gap that is large enough that the key body can be freely inserted into the keyhole and receptacle and small enough that the coupling key can couple the driveshaft to the rotating component in a rotational direction; andat least one zero backlash ring extending around the key body and protruding from surfaces of the key body and into the gap such that an interference fit is established between the coupling key, the keyhole, and the receptacle when the coupling key is coupling the driveshaft and rotating component together. 2. A coupling key as claimed in claim 1 further comprising at least one groove extending around the key body and wherein the at least one zero backlash ring is seated in the groove with a portion of the zero backlash ring protruding outwardly from the groove. 3. A coupling key as claimed in claim 2 comprising at least two grooves and at least two zero backlash rings with each zero backlash ring seated in a respective groove. 4. A coupling key as claimed in claim 1 wherein the dimension of the zero backlash ring protruding from the surfaces of the key body is larger than the gap, and the zero backlash ring is composed of a thermoplastic material that is elastically deformable and which swells in the presence of heat or moisture or both heat and moisture, whereby the zero backlash ring can compress to permit the coupling key to be inserted into the keyhole and receptacle and expand to form the interference fit after the coupling key has been inserted into the keyhole and receptacle. 5. A coupling key as claimed in claim 1 wherein the dimension of the zero backlash ring protruding from the surfaces of the key body is larger than the gap, and the zero backlash key is composed of a material that is plastically deformable. 6. A coupling key as claimed in claim 5 wherein the zero backlash ring is composed of a material which swells in the presence of heat or moisture or both heat and moisture. 7. A coupling key as claimed in claim 1 wherein the dimension of the zero backlash ring protruding from the surfaces of the key body is larger than the gap, and the zero backlash key is composed of a material that is shearable. 8. A coupling key as claimed in claim 1 wherein the dimension of the zero backlash ring protruding from the surfaces of the key body is the same size as the gap and the zero backlash ring is composed of a material which swells in the presence of heat or moisture or both heat and moisture. 9. A coupling key as claimed in 1 wherein the rotating component is selected from the group consisting of a rotor of a fluid pressure pulse generator and a gearbox for a motor of a pulser assembly. 10. A measurement while drilling telemetry apparatus comprising (a) a pulser assembly comprising a motor, a driveshaft rotationally coupled to the motor, and sensor and motor control equipment communicative with the motor;(b) a fluid pressure pulse generator comprising a stator for fixedly coupling to a landing sub, and a rotor; and(c) a driveline coupling key fixedly coupling the driveshaft to the rotor,wherein the driveshaft comprises a keyhole configured to receive a portion of the coupling key and comprising a bore extending from a side of the driveshaft and at least partially through the driveshaft,wherein the rotating component comprises a receptacle configured to axially receive the driveshaft and a portion of the coupling key protruding outwardly from the driveshaft keyhole, andwherein the driveline coupling key comprises: a key body having dimensions selected to fit within the keyhole and receptacle with a gap that is large enough that the key body can be freely inserted into the keyhole and receptacle and small enough that the key body can couple the driveshaft to the rotating component in a rotational direction; andat least one zero backlash ring extending around the key body and protruding from surfaces of the key body and into the gap such that an interference fit is established between the coupling key, the keyhole, and the receptacle when the coupling key is coupling the driveshaft and rotating component together. 11. An apparatus as claimed in claim 10 further comprising a coupling key as claimed in claim 2. 12. A measurement while drilling telemetry apparatus comprising: (a) a pulser assembly comprising: a housing; a motor fixedly coupled to the housing; a driveshaft rotationally coupled to the motor; sensor and motor control equipment communicative with the motor; and a mechanical stop sub-assembly comprising: a collar fixedly coupled to the housing and an indexer protruding from a side of the driveshaft, the collar comprising an angular movement restrictor window with a central window segment which axially and rotatably receives the driveshaft, and an indexing window segment in communication with the central window segment and which receives the indexer, the indexing window segment having an angular span across which the indexer can be oscillated by the driveshaft, wherein the indexer is a coupling key coupling the driveshaft to a gearbox of the motor, the driveshaft having a keyhole and the gearbox having a receptacle, and the coupling key having a key body with dimensions which extend through the keyhole and receptacle and into the indexing window segment; and(b) a fluid pressure pulse generator comprising a stator for affixing to a landing sub, and a rotor fixedly attached to the driveshaft such that the angular span of the indexing window segment defines the angular range of the rotor's angular movement relative to the stator. 13. An apparatus as claimed in claim 12 wherein the angular movement restrictor window comprises a pair of opposed indexing window segments and the coupling key extends from the driveshaft into the opposed indexing window segments. 14. An apparatus as claimed in claim 12 wherein the coupling key comprises at least one zero backlash ring extending around the key body and protruding from surfaces of the key body and into a gap in between the key body and the keyhole and receptacle, such that an interference fit is established between the coupling key, the keyhole, and the receptacle when the coupling key is coupling the driveshaft and gearbox together. 15. An apparatus as claimed in claim 12 wherein the annular span is 60 degrees. 16. An apparatus as claimed in claim 12 wherein the sensor and motor control equipment comprises a processor and a memory having encoded thereon a program executable by the processor to perform a calibration method comprising rotating the driveshaft such that the indexer contacts a side of the indexing window segment representing one end of the angular span; determining a calibration position of the indexer by selecting an angular position that is a selected angular distance from the contacted side of the indexing window segment; and positioning the indexer at the calibration position by rotating the indexer from the contacted side of the window segment by the selected angular distance. 17. A measurement while drilling telemetry apparatus comprising: (a) a pulser assembly comprising: a housing; a motor fixedly coupled to the housing; a driveshaft rotationally coupled to the motor; sensor and motor control equipment communicative with the motor; and a mechanical stop sub-assembly comprising: a collar fixedly coupled to the housing and an indexer protruding from a side of the driveshaft, the collar comprising an angular movement restrictor window with a central window segment which axially and rotatably receives the driveshaft, and an indexing window segment in communication with the central window segment and which receives the indexer, the indexing window segment having an angular span across which the indexer can be oscillated by the driveshaft, wherein the indexer comprises: a key body with dimensions which extend through a keyhole in the driveshaft and into the indexing window segment; and at least one zero backlash ring extending around the key body and protruding from surfaces of the key body and into a gap in between the key body and the keyhole, such that an interference fit is established between the key body and the keyhole when the key body is received in the keyhole; and(b) a fluid pressure pulse generator comprising a stator for affixing to a landing sub, and a rotor fixedly attached to the driveshaft such that the angular span of the indexing window segment defines the angular range of the rotor's angular movement relative to the stator. 18. A mechanical stop sub-assembly for a pulser assembly of a measurement while drilling telemetry apparatus, the sub-assembly comprising: a collar fixedly mountable to a housing of the pulser assembly; andan indexer fixedly mountable to a driveshaft of the pulser assembly such that a portion of the indexer protrudes from a side of the driveshaft, the indexer comprising a coupling key for coupling the driveshaft to a gearbox of a motor of the pulser assembly,wherein the collar comprises an angular movement restrictor window with a central window segment for axially and rotatably receiving the driveshaft, and an indexing window segment in communication with the central window segment and which receives the protruding indexer portion when the driveshaft is being received by the central window segment, the indexing window segment having an angular span across which the indexer can be oscillated by the driveshaft; the angular span selected to define an angular range of a rotor's angular movement relative to a stator, and wherein the rotor and stator are part of a fluid pressure pulse generator of the measurement while drilling telemetry apparatus and the rotor is affixed to the driveshaft, and wherein the coupling key has a key body with dimensions which extend through a keyhole in the driveshaft and receptacle in the gearbox and into the indexing window segment. 19. A sub-assembly as claimed in claim 18 wherein the angular movement restrictor window comprises a pair of opposed indexing window segments and the coupling key extends from the driveshaft into the opposed indexing window segments. 20. A sub-assembly as claimed in claim 18 wherein the coupling key comprises at least one zero backlash ring extending around the key body and protruding from surfaces of the key body and into a gap in between the key body and the keyhole and receptacle, such that an interference fit is established between the coupling key, the keyhole, and the receptacle when the coupling key is coupling the driveshaft and gearbox together. 21. A sub-assembly as claimed in claim 18 wherein the angular span is 60 degrees. 22. A mechanical stop sub-assembly for a pulser assembly of a measurement while drilling telemetry apparatus, the sub-assembly comprising: a collar fixedly mountable to a housing of the pulser assembly; andan indexer fixedly mountable to a driveshaft of the pulser assembly such that a portion of the indexer protrudes from a side of the driveshaft,wherein the collar comprises an angular movement restrictor window with a central window segment for axially and rotatably receiving the driveshaft, and an indexing window segment in communication with the central window segment and which receives the protruding indexer portion when the driveshaft is being received by the central window segment, the indexing window segment having an angular span across which the indexer can be oscillated by the driveshaft; the angular span selected to define an angular range of a rotor's angular movement relative to a stator, and wherein the rotor and stator are part of a fluid pressure pulse generator of the measurement while drilling telemetry apparatus and the rotor is affixed to the driveshaft, and wherein the indexer comprises: a key body with dimensions which extend through a keyhole in the driveshaft and into the indexing window segment; and at least one zero backlash ring extending around the key body and protruding from surfaces of the key body and into a gap in between the key body and the keyhole, such that an interference fit is established between the key body and the keyhole when the key body is received in the keyhole.
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이 특허에 인용된 특허 (12)
Claycomb Jackson R. (Lafayette LA), Apparatus for transmitting well bore data.
Turner, William Evans; Biglin, Jr., Denis P., Method and apparatus for transmitting information to the surface from a drill string down hole in a well.
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