Method of drilling, analyzing and stabilizing a terrestrial or other planetary subsurface formation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21C-051/00
E21B-019/20
E21B-019/22
출원번호
US-0956720
(2001-09-20)
발명자
/ 주소
Streich, Steven George
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Gonley Rose, P.C.
인용정보
피인용 횟수 :
16인용 특허 :
8
초록▼
The present invention provides a method for drilling, analyzing, and stabilizing subsurface formations. The system is generally formed around a reusable bottomhole assembly (BHA) that provides an anchoring and thrust mechanism, furnishing the necessary downward force needed to provide comminution of
The present invention provides a method for drilling, analyzing, and stabilizing subsurface formations. The system is generally formed around a reusable bottomhole assembly (BHA) that provides an anchoring and thrust mechanism, furnishing the necessary downward force needed to provide comminution of geological material in a borehole. The BHA is conveyed into the borehole via a communications link wireline equiped with internal power and data telemetry lines. The BHA permits the use of multiple comminution sampling and analysis tools via a coupling device. The BHA and communications link wireline are mounted so as to couple with different tools. The main drilling mechanism is a torque drive assembly powered coring tool. A borehole televiewer and/or logging analysis tool may follow each coring period. The final step in each coring period is a wellbore consolidation technique. This series of steps is then repeated, each time coring the wellbore to a deeper depth.
대표청구항▼
The present invention provides a method for drilling, analyzing, and stabilizing subsurface formations. The system is generally formed around a reusable bottomhole assembly (BHA) that provides an anchoring and thrust mechanism, furnishing the necessary downward force needed to provide comminution of
The present invention provides a method for drilling, analyzing, and stabilizing subsurface formations. The system is generally formed around a reusable bottomhole assembly (BHA) that provides an anchoring and thrust mechanism, furnishing the necessary downward force needed to provide comminution of geological material in a borehole. The BHA is conveyed into the borehole via a communications link wireline equiped with internal power and data telemetry lines. The BHA permits the use of multiple comminution sampling and analysis tools via a coupling device. The BHA and communications link wireline are mounted so as to couple with different tools. The main drilling mechanism is a torque drive assembly powered coring tool. A borehole televiewer and/or logging analysis tool may follow each coring period. The final step in each coring period is a wellbore consolidation technique. This series of steps is then repeated, each time coring the wellbore to a deeper depth. ast one cutting element, a second cutting surface adjacent the first cutting surface oriented at a second angle less than the first angle with respect to the reference line extending parallel to the longitudinal axis, and a third, radially innermost cutting surface; drilling a relatively hard formation with the rotary drill bit by engaging primarily at least a portion of the first cutting surface of the superabrasive, multi-aggressive cutting face of the at least one cutting element with the relatively hard formation at a first depth-of-cut; and drilling a relatively soft formation with the rotary drill bit by engaging at least a portion of the second cutting surface of the superabrasive, multi-aggressive cutting face of the at least one cutting element with the relatively soft formation in addition to engaging at least a portion of the relatively soft formation with at least a portion of the first cutting surface of the superabrasive, multi-aggressive cutting ace at a second depth-of-cut. 4. The method of claim 3, wherein providing the rotary drill bit including at least one cutting element thereon comprises providing the superabrasive, multi-aggressive cutting face of the at least one cutting element with a third, radially innermost cutting surface oriented approximately perpendicular to the longitudinal axis of the at least one cutting element. 5. The method of claim 3, wherein drilling the relatively soft formation and drilling the relatively hard formation comprise drilling the relatively soft formation and the relatively hard formation at a generally constant weight-on-bit. 6. A method of drilling subterranean formations comprising: providing a rotary drill bit including a plurality of circumferentially spaced, longitudinally extending blade structures having a plurality of cutting elements on each of the plurality of blade structures, at least one cutting element of the plurality of cutting elements including a longitudinal axis, a superabrasive, multi-aggressive cutting face extending in two dimensions generally transverse to the longitudinal axis, a radially outermost sidewall of the cutting face, the cutting face of the at least one cutting element including a first cutting surface oriented at a first angle with respect to a reference line adjacent the radially outermost sidewall and extending parallel to the longitudinal axis of the at least one cutting element, and a second cutting surface adjacent the first cutting surface oriented at a second angle less than the first angle with respect to the reference line extending parallel to the longitudinal axis; drilling a relatively hard formation with the rotary drill bit by engaging primarily at least a portion of the first cutting surface of the superabrasive, multi-aggressive cutting face of the at least one cutting element with the relatively hard formation at a first depth-of-cut; and drilling a relatively soft formation with the rotary drill bit by engaging at least a portion of the second cutting surface of the superabrasive, multi-aggressive cutting face of the at least one cutting element with the relatively soft formation in addition to engaging at least a portion of the relatively soft formation with at least a portion of the first cutting surface of the superabrasive, multi-aggressive cutting face at a second depth-of-cut at a respectively selected weight-on-bit which maximizes a rate-of-penetration through each formation and which generates a respective torque-on-bit which is below a selected threshold. 7. The method of claim 6, wherein providing the rotary drill bit including a plurality of circumferentially spaced, longitudinally extending blade structures comprises providing a plurality of circumferentially spaced, longitudinally extending blade structures having a plurality of the at least one cutting elements oriented at preselected cutting element backrake angles. 8. The method of claim 6, wherein drilling the relatively soft formation and d
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이 특허에 인용된 특허 (8)
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Tchakarov, Borislav; Sagoo, Bahadur; Phan, Quan; Ashcraft, David, Rotary coring device and method for acquiring a sidewall core from an earth formation.
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