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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0422084 (2009-04-10) |
등록번호 | US-8151907 (2012-04-10) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 59 인용 특허 : 746 |
A method for forming a subsurface wellbore is disclosed. The method includes operating a drilling string in a first direction of rotation. A first motor located near the end of the drilling string is operated in a direction of rotation opposite that of the drilling string. A drill bit is rotated usi
A method for forming a subsurface wellbore is disclosed. The method includes operating a drilling string in a first direction of rotation. A first motor located near the end of the drilling string is operated in a direction of rotation opposite that of the drilling string. A drill bit is rotated using a second motor that is coupled to the first motor.
1. A method for forming a subsurface wellbore, comprising: operating a drilling string in a first direction of rotation;operating a first motor located near the end of the drilling string to rotate a bottom hole assembly in a direction of rotation opposite the direction of rotation of the drilling s
1. A method for forming a subsurface wellbore, comprising: operating a drilling string in a first direction of rotation;operating a first motor located near the end of the drilling string to rotate a bottom hole assembly in a direction of rotation opposite the direction of rotation of the drilling string; androtating a drill bit using a second motor that is coupled to the first motor. 2. The method of claim 1, further comprising controlling a rotation of at least a portion of the bottom hole assembly coupled to the drilling string. 3. The method of claim 1, further comprising controlling the drill bit by changing a rotation speed of the drilling string or a rotation speed of the first motor. 4. The method of claim 1, further comprising changing a trajectory of drilling while the drilling string remains in a rotary mode. 5. The method of claim 4, wherein changing a trajectory of drilling while the drilling string remains in a rotary mode comprises: reducing the speed of the drilling string to a neutral drilling speed in which the drilling string speed is substantially equal and opposite to a speed of the first motor; andchanging the direction of the drill bit to change the trajectory of drilling. 6. The method of claim 1, further comprising: determining a differential pressure for the bottom hole assembly at a neutral drilling speed;measuring a differential pressure for the bottom hole assembly during operation; andusing the measured differential pressure to control a speed of the drilling string relative to a neutral drilling speed. 7. The method of claim 1, further comprising using at least one spatial offset or angular offset to determine a steering solution to move the trajectory of the drilling string back into convergence with a desired drilling geometry. 8. The method of claim 1, wherein combined rotation speed of the drilling string and the first moter results in a forward rotation speed. 9. The method of claim 1, wherein a rotation speed of the first motor is greater than the rotation speed of the drilling string. 10. A system for forming a subsurface wellbore, comprising: a drilling string configured to rotate in a first direction;a bottom hole assembly comprising a drill bit, the drill bit being configured to form the wellbore;a first motor located near the end of the drilling string, the first motor being configured to rotate a portion of the bottom hole assembly in a direction opposite to that of the drilling string; anda second motor configured to rotate the drill bit. 11. The system of claim 10, further comprising a control system configured to control the drill bit by changing a rotation speed of the drilling string or a rotation speed of the first motor. 12. The system of claim 10, wherein the first motor is installed in an inverted orientation. 13. The system of claim 10, wherein the first motor comprises a stator and a rotor, and wherein the rotor is coupled to a driveshaft of the drilling string. 14. The system of claim 13, wherein the first motor comprises a motor shaft coupled to the rotor, and wherein the motor shaft faces up-hole. 15. The system of claim 14, wherein the motor shaft is coupled to the drilling string by way of a reverse threaded connection, and wherein the reverse threaded connection is configured to inhibit backing out of the motor shaft relative to the drilling string. 16. The system of claim 14, wherein the motor shaft is coupled to the drilling string by way of a backoff-protected connection, and wherein the backoff-protected connection is configured to inhibit backing out of the motor shaft relative to the drilling string. 17. The system of claim 10, wherein the first motor is a straight mud motor, and the second motor is a bent sub or a bent housing steerable mud motor. 18. A system for forming a subsurface wellbore, comprising: a drilling string;a first motor located near the end of the drilling string configured to rotate in a direction of rotation opposite that of the drilling string;a drill bit on an end of the drilling string, the drill bit being configured to form the wellbore;a second motor configured to rotate the drill bit; anda non-rotating sensor located on the drilling string. 19. The system of claim 18, wherein the non-rotating sensor is coupled to the first motor, and wherein the first motor is configured to rotate in counter-rotation to at least a portion of a bottom hole assembly such that the rotation speed of the non-rotating sensor is substantially zero. 20. The system of claim 18, further comprising a control system configured to control a speed of the first motor to inhibit rotation of the non-rotating sensor. 21. The system of claim 18, wherein the non-rotating sensor comprises one or more transceivers configured to communicate data for position measurement, and the system further comprises a control system configured to control drilling operations based on data from the one or more transceivers. 22. The system of claim 18, wherein the first motor is a mud motor. 23. A method for forming a subsurface wellbore, comprising: operating a drilling string in a first direction of rotation;operating a first motor located near the end of the drilling string in a direction of rotation opposite that of the drilling string;rotating a drill bit using a second motor that is coupled to the first motor; andusing at least one spatial offset or angular offset to determine a steering solution to move the trajectory of the drilling string back into convergence with a desired drilling geometry. 24. The method of claim 23, further comprising controlling a rotation of at least a portion of a bottom hole assembly coupled to the drilling string. 25. The method of claim 23, further comprising controlling the drill bit by changing a rotation speed of the drilling string or a rotation speed of the first motor. 26. The method of claim 23, further comprising changing a trajectory of drilling while the drilling string remains in a rotary mode. 27. A method for forming a subsurface wellbore, comprising: operating a drilling string in a first direction of rotation;operating a first motor located near the end of the drilling string in a direction of rotation opposite that of the drilling string;rotating a drill bit using a second motor that is coupled to the first motor;determining a differential pressure for a bottom hole assembly at a neutral drilling speed;measuring a differential pressure for the bottom hole assembly during operation; andusing the measured differential pressure to control a speed of the drilling string relative to a neutral drilling speed. 28. The method of claim 27, further comprising changing a trajectory of drilling while the drilling string remains in a rotary mode. 29. The method of claim 28, wherein changing a trajectory of drilling while the drilling string remains in a rotary mode comprises: reducing the speed of the drilling string to a neutral drilling speed in which the drilling string speed is substantially equal and opposite to a speed of the first motor; andchanging the direction of the drill bit to change the trajectory of drilling. 30. A system for forming a subsurface wellbore, comprising: a drilling string configured to rotate in a first direction;a bottom hole assembly comprising a drill bit, the drill bit being configured to form the wellbore;a first motor located near the end of the drilling string, the first motor being configured to rotate a portion of the bottom hole assembly in a direction opposite to that of the drilling string, wherein the first motor is installed in an inverted orientation.
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