[특허]Drill bit with hydraulically adjustable axial pad for controlling torsional fluctuations

Drill bit with hydraulically adjustable axial pad for controlling torsional fluctuations 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-044/00 E21B-010/62 E21B-010/42
출원번호	US-0489563 (2012-06-06)
등록번호	US-9915138 (2018-03-13)
발명자 / 주소	Schwefe, Thorsten Beuershausen, Chad J.
출원인 / 주소	BAKER HUGHES, A GE COMPANY, LLC
대리인 / 주소	Cantor Colburn LLP
인용정보	피인용 횟수 : 0 인용 특허 : 55

초록 ▼

A drill bit that includes one or more cutters on a surface thereon configured to penetrate into a formation. The drill bit includes at least one pad at the surface, an actuation device configured to supply a fluid under pressure to the pad to extend the pad from the surface. The drill bit also includes a relief device configured to drain fluid supplied to the pad to reduce the pressure on the at least one pad when the force applied on the at least one pad exceeds a selected limit.

대표청구항 ▼

1. A drill bit, comprising: a surface that includes one or more cutters thereon configured to penetrate into a formation;at least one pad at the surface;a fluid channel that extends between a reservoir and the at least one pad, the reservoir having a clean hydraulic fluid;an actuation unit in the fluid channel configured to pump the hydraulic fluid from the reservoir to the at least one pad through the fluid channel to extend and retract the at least one pad from the surface;a relief path that extends between the at least one pad and the reservoir of clean hydraulic fluid; anda check valve in the relief path configured to transfer fluid at the at least one pad through the relief path to the reservoir to reduce the pressure on the at least one pad when a hydraulic pressure applied on the check valve exceeds a selected limit, wherein the check valve is forced from a closed position to an open position by the hydraulic pressure applied to the check valve. 2. The drill bit of claim 1, wherein the at least one pad comprises a plurality of extendable pads and wherein the actuation unit extends each extendable pad to substantially the same extension. 3. The drill bit of claim 1, wherein the at least one pad is placed in a cavity in the drill bit. 4. The drill bit of claim 2 further comprising a biasing member coupled to the at least one extendable pad that causes the at least one pad to retract when the force applied to the pad is reduced. 5. The drill bit of claim 1 further comprising a fluid channel configured to supply the fluid under pressure to cause the at least one pad to extend to the selected position. 6. The drill bit of claim 1, wherein the actuation unit includes at least one o£ a power unit that supplies fluid under pressure to the at least one pad; and controller that controls the supply of the fluid. 7. The drill bit of claim 1 further comprising a check valve with a hydraulic release between the actuation device and the at least one pad to control the supply of the fluid to the at least one pad. 8. The drill bit of claim 5, wherein the fluid channel is located as one of: outside a main fluid channel in the drill bit; and at least partially inside the main fluid channel in the drill bit. 9. A method of drilling a wellbore, comprising: conveying a drill bit attached to a bottomhole assembly into the wellbore, the drill bit including at least one pad at a surface of the drill bit; a fluid channel that extends between a reservoir having a clean hydraulic fluid and the at least one pad; an actuation device in the fluid channel configured to pump the clean fluid from the reservoir to the at least one pad to apply a force to the at least one pad to extend and retract the at least one pad from the surface; a relief path that extends between the at least one pad and the reservoir of clean hydraulic fluid; and a check valve in the relief path configured to transfer fluid at the at least one pad through the relief path to the reservoir to reduce the pressure on the pad when a hydraulic pressure applied on the check valve exceeds a selected limit, wherein the check valve is forced from a closed position to an open position by the hydraulic pressure applied to the check valve; anddrilling the wellbore with the bottomhole assembly; andextending and retracting the at least one pad from the surface of the drill bit during drilling of the wellbore to control fluctuation of the drill bit during drilling of the wellbore. 10. The method of claim 9, wherein the at least one pad comprises a plurality of pads and wherein the method further comprises extending each pad to substantially the same extension. 11. The method of claim 9 further comprising coupling a biasing member to the at least one pad to cause the at least one pad to retract when the applied force is reduced. 12. The method of claim 9, wherein applying the force comprises using an actuation device includes at least one of: a power unit that supplies fluid under pressure to the at least one pad; and controller that controls the supply of the fluid to the at least one pad. 13. The method of claim 9 further comprising controlling the applied force in response to a selected parameter relating the drilling of the wellbore. 14. The method of claim 13, wherein the selected parameter is selected from a group consisting of; (i) vibration; (ii) stick-slip; (iii) weight-on-bit; (iv) rate of penetration of the drill bit; (v) bending moment; (vi) axial acceleration; (vii) radial acceleration; and (viii) drill bit fluctuations. 15. The method of claim 9 further comprising extending the at least one pad when drilling transitions from a soft formation to a hard formation or from a hard formation to a soft formation. 16. An apparatus for use in drilling a wellbore, comprising: a drill bit attached to a bottom end of a bottomhole assembly, the drill bit having a surface that includes one or more cutters and at least one pad; a fluid channel that extends between a reservoir having a clean hydraulic fluid and the at least one pad; and an actuation unit in the fluid channel configured to pump clean hydraulic fluid from the reservoir to the at least one pad through the fluid channel to apply a hydraulic pressure to the at least one pad to extend and retract the at least one pad from the surface;a relief path that extends between the at least one pad and the reservoir of clean hydraulic fluid; anda check valve in the relief path configured to transfer the fluid at the at least one pad through the relief path to the reservoir to reduce the pressure on the at least one pad when the hydraulic pressure applied on the check valve exceeds a selected limit, wherein the check valve is forced from a closed position to an open position by the hydraulic pressure applied to the check valve. 17. The apparatus of claim 16 further comprising a controller configured to control the actuation device to control the selected extension of the pad to control fluctuations in the drill bit during drilling of a wellbore. 18. The apparatus of claim 17, wherein the controller is further configured to control the actuation device in response to a parameter that is selected from a group consisting of: (i) vibration; (ii) stick-slip; (iii) weight-on-bit; (iv) rate of penetration of the drill bit; (v) bending moment; (vi) axial acceleration; (vii) radial acceleration; and (viii) drill bit fluctuations. 19. The apparatus of claim 16, wherein the actuation device includes a power unit that supplies fluid under pressure to cause the at least one pad to extend. 20. The apparatus of 16 further comprising a sensor that provides signals relating to the force applied by the actuation device on the at least one pad. 21. The apparatus of claim 16, wherein the at least one pad comprises a plurality of pads and wherein the actuation device applies substantially the same force to each of the pads in the plurality of pads.

이 특허에 인용된 특허 (55)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Drill bit with hydraulically adjustable axial pad for controlling torsional fluctuations 원문보기

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Drill bit with hydraulically adjustable axial pad for controlling torsional fluctuations 원문보기

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