Fluid pressure pulse generator and method of using same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-047/18
E21B-034/06
E21B-010/34
출원번호
US-0440670
(2013-11-06)
등록번호
US-9494035
(2016-11-15)
국제출원번호
PCT/CA2013/050843
(2013-11-06)
국제공개번호
WO2014/071514
(2014-05-15)
발명자
/ 주소
Logan, Aaron W.
Switzer, David A.
Logan, Justin C.
Liu, Jili
출원인 / 주소
Evolution Engineering Inc.
대리인 / 주소
Seed IP Law Group PLLC
인용정보
피인용 횟수 :
0인용 특허 :
77
초록▼
A fluid pressure pulse generator comprising a stator and rotor that can be used in measurement while drilling using mud pulse or pressure pulse telemetry is disclosed. The stator comprises a stator body with a circular opening therethrough and the rotor comprises a circular rotor body rotatably rece
A fluid pressure pulse generator comprising a stator and rotor that can be used in measurement while drilling using mud pulse or pressure pulse telemetry is disclosed. The stator comprises a stator body with a circular opening therethrough and the rotor comprises a circular rotor body rotatably received in the circular opening of the stator body. One of the stator body or the rotor body comprises one or more than one fluid opening for flow of fluid therethrough and the other of the stator body or the rotor body comprises one or more than one full flow chamber. The rotor is rotatable between a full flow configuration whereby the full flow chamber and the fluid opening align so that fluid flows from the full flow chamber through the fluid opening, and a reduced flow configuration whereby the full flow chamber and the fluid opening are not aligned. The flow of fluid through the fluid opening in the reduced flow configuration is less than the flow of fluid through the fluid opening in the full flow configuration thereby generating a fluid pressure pulse.
대표청구항▼
1. A fluid pressure pulse generator comprising: (a) a stator comprising a stator body with a circular opening therethrough, wherein the stator body comprises one or more than one full flow chamber comprising a fluid chamber with an uphole axial fluid inlet and a lateral fluid outlet; and(b) a rotor
1. A fluid pressure pulse generator comprising: (a) a stator comprising a stator body with a circular opening therethrough, wherein the stator body comprises one or more than one full flow chamber comprising a fluid chamber with an uphole axial fluid inlet and a lateral fluid outlet; and(b) a rotor comprising a circular rotor body rotatably received in the circular opening of the stator body, wherein the rotor body comprises one or more than one lateral fluid opening for flow of fluid therethrough and the lateral fluid opening is fluidly coupled to a curved depression on an external surface of the rotor body, whereby the curved depression is configured to direct fluid through the lateral fluid opening,wherein the rotor is rotatable between: (i) a full flow configuration whereby the lateral fluid outlet of the full flow chamber and the lateral fluid opening align so that fluid flows from the fluid chamber through the lateral fluid opening; and(ii) a reduced flow configuration whereby the lateral fluid outlet of the full flow chamber and the lateral fluid opening are not aligned and the flow of fluid through the lateral fluid opening is less than the flow of fluid through the lateral fluid opening in the full flow configuration thereby generating a first fluid pressure pulse. 2. The fluid pressure pulse generator as claimed in claim 1, wherein the flow area of the fluid chamber is substantially equal to a flow area of the lateral fluid opening. 3. The fluid pressure pulse generator as claimed in claim 1, wherein a bottom surface of the fluid chamber is angled in the fluid flow direction for smooth flow of fluid from the fluid chamber to the lateral fluid opening. 4. The fluid pressure pulse generator as claimed in claim 1, wherein the full flow chamber includes a bypass channel for flow of fluid through the full flow chamber. 5. The fluid pressure pulse generator as claimed in claim 1, further comprising a channel in the external surface of the rotor body fluidly connecting the curved depression and the lateral fluid opening. 6. The fluid pressure pulse generator as claimed in claim 1, wherein the curved depression is sloped and increases in depth from an end furthest from the lateral fluid opening to an end closest to the lateral fluid opening. 7. The fluid pressure pulse generator as claimed in claim 6, wherein the curved depression is shaped like a spoon head. 8. The fluid pressure pulse generator as claimed in claim 1, wherein the rotor body comprises a plurality of lateral fluid openings with leg sections positioned therebetween with an edge of each leg section perpendicular to a direction of rotation of the rotor, a wall thickness of the edge of the leg section being less than a wall thickness of a middle part of the leg section. 9. The fluid pressure pulse generator as claimed in claim 1, wherein the stator body further comprises one or more than one wall section on an internal surface of the stator body whereby the lateral fluid opening of the rotor body aligns with the wall section in the reduced flow configuration. 10. The fluid pressure pulse generator as claimed in claim 9, wherein a portion of the fluid chamber is positioned behind the wall section. 11. A fluid pressure pulse generator comprising: (a) a stator comprising a stator body with a circular opening therethrough; and(b) a rotor comprising a circular rotor body rotatably received in the circular opening of the stator body,wherein one of the stator body or the rotor body comprises one or more than one lateral fluid opening for flow of fluid therethrough and the other of the stator body or the rotor body comprises one or more than one full flow chamber and one or more than one intermediate flow chamber with a flow area less than a flow area of the full flow chamber, the full flow chamber comprising a fluid chamber with an uphole axial fluid inlet and a lateral fluid outlet and the intermediate flow chamber comprising an intermediate fluid chamber with an uphole axial fluid inlet and a lateral fluid outlet, wherein the rotor is rotatable between: (i) a full flow configuration whereby the lateral fluid outlet of the full flow chamber and the lateral fluid opening align so that fluid flows from the fluid chamber through the lateral fluid opening;(ii) a reduced flow configuration whereby the lateral fluid outlet of the full flow chamber and the lateral fluid opening are not aligned and the flow of fluid through the lateral fluid opening is less than the flow of fluid through the lateral fluid opening in the full flow configuration thereby generating a first fluid pressure pulse; and(iii) an intermediate flow configuration whereby the lateral fluid outlet of the intermediate flow chamber and the lateral fluid opening align so that fluid flows from the intermediate fluid chamber through the lateral fluid opening, and the flow of fluid through the lateral fluid opening in the intermediate flow configuration is less than the flow of fluid through the lateral fluid opening in the full flow configuration but more than the flow of fluid through the lateral fluid opening in the reduced flow configuration thereby generating a second fluid pressure pulse which is reduced compared to the first fluid pressure pulse. 12. A measurement while drilling tool comprising the fluid pressure pulse generator as claimed in claim 1 and a pulser assembly with a drive shaft, wherein the rotor of the fluid pressure pulse generator is fixed to the drive shaft for rotation thereby. 13. The fluid pressure pulse generator as claimed in claim 11, wherein the flow area of the intermediate fluid chamber is less than the flow area of the lateral fluid opening. 14. The fluid pressure pulse generator as claimed in claim 11, wherein a bottom surface of the intermediate fluid chamber is angled in the fluid flow direction for smooth flow of fluid from the intermediate fluid chamber to the lateral fluid opening. 15. The fluid pressure pulse generator as claimed in claim 11, wherein the intermediate flow chamber includes a bypass channel for flow of fluid through the intermediate flow chamber. 16. A stator for a fluid pressure pulse generator, the stator comprising a stator body with a circular opening therethrough configured to receive a circular rotor for rotation therein, the stator body comprising one or more than one full flow chamber comprising a fluid chamber in a wall of the stator body with an uphole axial fluid inlet and a lateral fluid outlet, wherein the lateral fluid outlet is configured to align with one or more than one lateral fluid opening in the rotor such that there is flow of fluid from the fluid chamber through the lateral fluid opening. 17. The stator as claimed in claim 16, wherein a bottom surface of the fluid chamber is angled in the fluid flow direction for smooth flow of fluid from the fluid chamber to the lateral fluid opening. 18. The stator as claimed in claim 16, further comprising a wall section on an internal surface of the stator body configured to align with the lateral fluid opening in the rotor. 19. The stator as claimed in claim 18, wherein a portion of the fluid chamber is positioned behind the wall section. 20. The stator as claimed in claim 16, wherein the full flow chamber includes a bypass channel for flow of fluid through the full flow chamber. 21. The stator as claimed in claim 16, wherein the stator body further comprises one or more than one intermediate flow chamber with a flow area less than a flow area of the full flow chamber, wherein the intermediate flow chamber comprises an intermediate fluid chamber with an uphole axial fluid inlet and a lateral fluid outlet, wherein the lateral fluid outlet of the intermediate flow chamber is configured to align with the lateral fluid opening in the rotor such that there is flow of fluid from the intermediate flow chamber through the lateral fluid opening. 22. The stator as claimed in claim 21, wherein a bottom surface of the intermediate fluid chamber is angled in the fluid flow direction for smooth flow of fluid from the intermediate fluid chamber to the lateral fluid opening. 23. The stator of claim 21, wherein the intermediate flow chamber includes a bypass channel for flow of fluid through the intermediate flow chamber. 24. A rotor for a fluid pressure pulse generator, the rotor comprising a circular body with a lateral fluid opening therethrough and a curved depression on an external surface of the circular body, the curved depression being uphole and fluidly coupled to the lateral fluid opening, the curved depression configured to direct fluid flowing along the external surface of the circular body through the lateral fluid opening. 25. The rotor as claimed in claim 24, wherein the curved depression is sloped and increases in depth from an end furthest from the lateral fluid opening to an end closest to the lateral fluid opening. 26. The rotor as claimed in claim 25, wherein the curved depression is shaped like a spoon head. 27. The rotor as claimed in claim 24, further comprising a channel in the external surface of the circular body fluidly connecting the curved depression and the lateral fluid opening. 28. The rotor as claimed in claim 24, wherein the circular body comprises a plurality of lateral fluid openings with leg sections positioned therebetween with an edge of each leg section perpendicular to a direction of rotation of the rotor, a wall thickness of the edge of the leg section being less than a wall thickness of a middle part of the leg section. 29. A measurement while drilling tool comprising a pulser assembly with a drive shaft and the rotor as claimed in claim 24 fixed to the drive shaft for rotation thereby. 30. A measurement while drilling tool system comprising the measurement while drilling tool of claim 29 and a plurality of the stators as claimed in claim 16, wherein the stator bodies of the plurality of stators have the same sized circular opening for receiving the circular body of the rotor and various different sized external dimensions to fit various different sized drill collars used for downhole drilling.
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