EP2188484A1 - System und verfahren zur steuerung eines bohrsystems zwecks bohrung eines lochs in einer erdformation - Google Patents
System und verfahren zur steuerung eines bohrsystems zwecks bohrung eines lochs in einer erdformationInfo
- Publication number
- EP2188484A1 EP2188484A1 EP08788277A EP08788277A EP2188484A1 EP 2188484 A1 EP2188484 A1 EP 2188484A1 EP 08788277 A EP08788277 A EP 08788277A EP 08788277 A EP08788277 A EP 08788277A EP 2188484 A1 EP2188484 A1 EP 2188484A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drilling system
- borehole
- drilling
- dynamic
- controlling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 567
- 238000000034 method Methods 0.000 title claims abstract description 183
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 83
- 230000008846 dynamic interplay Effects 0.000 claims abstract description 115
- 230000033001 locomotion Effects 0.000 claims abstract description 112
- 230000003993 interaction Effects 0.000 claims description 111
- 230000008569 process Effects 0.000 claims description 91
- 238000005520 cutting process Methods 0.000 claims description 30
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 230000000704 physical effect Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 description 70
- 230000008859 change Effects 0.000 description 13
- 239000012530 fluid Substances 0.000 description 13
- 230000003247 decreasing effect Effects 0.000 description 10
- 239000003381 stabilizer Substances 0.000 description 10
- 239000011435 rock Substances 0.000 description 9
- 230000001052 transient effect Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000007493 shaping process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 6
- 230000002708 enhancing effect Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/005—Below-ground automatic control systems
Definitions
- gauge pads confine this radial motion of the bottomhole assembly 17 and/or the drill bit 20 so as to produce a borehole with a smaller bore.
- the gauge pads of conventional drilling systems being deployed to minimize/eliminate the vibrational motion of the drilling system to provide a smaller/regular bore.
- the dynamic and/or unsteady motion of the bottomhole assembly 17 during the drilling of the borehole 27 may cause/result in the bottomhole assembly 17 repeatedly coming into contact with and/or impacting an inner surface of the borehole 27 throughout the drilling process.
- the inner surface of the borehole 27 comprising the inner-wall 40 and the bottom surface 41 of the borehole 27, i.e. the entire surface of the earth formation 30 that defines the borehole 27.
- the dynamic and/or unsteady motion of the bottomhole assembly 17 may be random in nature and, as such, may cause/result in random intermittent/repeat contact and/or impact between the bottomhole assembly 17 and the inner surface during the drilling process.
- the collar assembly 55 may itself be a structure with integral compliance, wherein the integral compliance may be selected to be non-uniform around the collar assembly 55 and the collar assembly 55 may be coupled with the bottomhole assembly 17 or maybe a section of the bottomhole assembly 17 without the compliant element 57.
- the collar assembly 55 may comprise a plurality of compliant elements, such as pads or the like, the plurality of compliant elements being coupled with the bottomhole assembly 17 and at least one of the compliant elements having a compliance that is different from the other compliant elements.
- a cam 79 may be coupled with the bottomhole assembly 17.
- the cam 79 may be moveable on the bottomhole assembly 17.
- the cam 79 may comprise an eccentric/non/symmetrical cylinder.
- the cam 79 may be moveable so as to contact the gauge pad assembly 73.
- the gauge pad assembly 73 may be configured to contact the inner-wall 53 and/or the drilling-face 54 during the process of drilling the borehole 50.
- the gauge pad assembly 73 may be directly coupled with the bottomhole assembly 17, coupled to the bottomhole assembly 17 by a coupler 76 or the like.
- the coupler 76 may comprise a compliant/elastic type of material that may allow for movement of the gauge pad assembly 73 relative to the bottomhole assembly 17.
- Positioning of the cutters on the drill bit 97,' cutter operation parameters may be used to provide for enhanced unsteady motion.
- the drilling system may incorporate a flexible/compliant coupling, a bent sub and/or the like (not shown) that may act to enhance unsteady interactions, enhance control of the drilling system from unsteady interactions and/or the like.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/839,381 US8757294B2 (en) | 2007-08-15 | 2007-08-15 | System and method for controlling a drilling system for drilling a borehole in an earth formation |
| US12/116,408 US8534380B2 (en) | 2007-08-15 | 2008-05-07 | System and method for directional drilling a borehole with a rotary drilling system |
| US12/116,444 US8720604B2 (en) | 2007-08-15 | 2008-05-07 | Method and system for steering a directional drilling system |
| US12/116,380 US8066085B2 (en) | 2007-08-15 | 2008-05-07 | Stochastic bit noise control |
| US12/116,390 US8763726B2 (en) | 2007-08-15 | 2008-05-07 | Drill bit gauge pad control |
| PCT/GB2008/002706 WO2009022115A1 (en) | 2007-08-15 | 2008-08-12 | System and method for controlling a drilling system for drilling a borehole in an earth formation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2188484A1 true EP2188484A1 (de) | 2010-05-26 |
Family
ID=41664355
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08788277A Withdrawn EP2188484A1 (de) | 2007-08-15 | 2008-08-12 | System und verfahren zur steuerung eines bohrsystems zwecks bohrung eines lochs in einer erdformation |
| EP08788278A Withdrawn EP2176493A1 (de) | 2007-08-15 | 2008-08-12 | Messtafelsteuerung für einen bohrmeissel |
| EP08788276A Withdrawn EP2188483A1 (de) | 2007-08-15 | 2008-08-12 | System und verfahren zur direktionalen bohrung eines bohrlochs mit einem drehbohrsystem |
| EP08788301A Withdrawn EP2176494A1 (de) | 2007-08-15 | 2008-08-12 | Verfahren und system zur lenkung eines direktionalen bohrsystems |
Family Applications After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08788278A Withdrawn EP2176493A1 (de) | 2007-08-15 | 2008-08-12 | Messtafelsteuerung für einen bohrmeissel |
| EP08788276A Withdrawn EP2188483A1 (de) | 2007-08-15 | 2008-08-12 | System und verfahren zur direktionalen bohrung eines bohrlochs mit einem drehbohrsystem |
| EP08788301A Withdrawn EP2176494A1 (de) | 2007-08-15 | 2008-08-12 | Verfahren und system zur lenkung eines direktionalen bohrsystems |
Country Status (7)
| Country | Link |
|---|---|
| EP (4) | EP2188484A1 (de) |
| CN (6) | CN101778992A (de) |
| AU (1) | AU2008288343A1 (de) |
| CA (4) | CA2694858C (de) |
| EA (5) | EA017791B1 (de) |
| MX (4) | MX340647B (de) |
| WO (4) | WO2009022116A1 (de) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8783382B2 (en) * | 2009-01-15 | 2014-07-22 | Schlumberger Technology Corporation | Directional drilling control devices and methods |
| WO2013067263A2 (en) | 2011-11-04 | 2013-05-10 | Schlumberger Canada Limited | Method and system for an automatic milling operation |
| CN102536192B (zh) * | 2012-03-15 | 2015-03-25 | 中国海洋石油总公司 | 一种井下定向动力钻具工具面动态控制系统及其控制方法 |
| CN103675925B (zh) * | 2013-12-18 | 2016-11-16 | 贝兹维仪器(苏州)有限公司 | 一种利用高频磁力仪随钻电阻率测量装置及方法 |
| CA2931099C (en) | 2013-12-20 | 2019-03-26 | Halliburton Energy Services, Inc. | Closed-loop drilling parameter control |
| GB2545823B (en) * | 2014-09-18 | 2020-08-26 | Halliburton Energy Services Inc | Real-time variable depth of cut control for a downhole drilling tool |
| CN104499940B (zh) * | 2014-11-02 | 2017-04-05 | 中国石油集团钻井工程技术研究院 | 一种全旋转指向式导向工具及导向方法 |
| CN104632184A (zh) * | 2014-12-26 | 2015-05-20 | 四川宏华电气有限责任公司 | 一种钻机角度精确定位检测和控制系统 |
| CN105332692B (zh) * | 2015-10-28 | 2018-10-23 | 西南石油大学 | 近钻头绝缘测量的新型组合涡轮钻具 |
| RU2612403C1 (ru) * | 2016-04-04 | 2017-03-09 | Общество с ограниченной ответственностью Научно-производственное предприятие "БУРИНТЕХ" (ООО НПП "БУРИНТЕХ") | Устройство для гидромеханического управления направленным роторным бурением |
| US10746009B2 (en) * | 2016-06-02 | 2020-08-18 | Baker Hughes, A Ge Company, Llc | Depth-based borehole trajectory control |
| CA3039489C (en) * | 2016-11-04 | 2021-01-19 | Halliburton Energy Services, Inc. | Flexible collar for a rotary steerable system |
| RU174947U1 (ru) * | 2017-04-19 | 2017-11-13 | Публичное акционерное общество специального машиностроения и металлургии "Мотовилихинские заводы" | Устройство для направленного бурения ствола скважины |
| US11066923B2 (en) * | 2017-06-26 | 2021-07-20 | Hrl Laboratories, Llc | System and method for generating output of a downhole inertial measurement unit |
| CN107816317B (zh) * | 2017-11-22 | 2019-02-22 | 中国矿业大学 | 一种高压电脉冲与机械钻相协同的快速钻进装置及方法 |
| US10738587B2 (en) * | 2018-05-04 | 2020-08-11 | Saudi Arabian Oil Company | Monitoring operating conditions of a rotary steerable system |
| RU2698759C1 (ru) * | 2018-06-04 | 2019-08-29 | Общество с ограниченной ответственностью Научно-производственное предприятие "БУРИНТЕХ" (ООО НПП "БУРИНТЕХ") | Компоновка бурильной колонны для строительства горизонтальных участков большой протяженности |
| US11434696B2 (en) * | 2018-07-02 | 2022-09-06 | Schlumberger Technology Corporation | Directional drilling systems and methods |
| US20200208472A1 (en) * | 2018-12-31 | 2020-07-02 | China Petroleum & Chemical Corporation | Steerable downhole drilling tool |
| WO2020168157A1 (en) * | 2019-02-15 | 2020-08-20 | Schlumberger Technology Corporation | Downhole directional drilling tool |
| WO2021021140A1 (en) | 2019-07-30 | 2021-02-04 | Landmark Graphics Corporation | Predictive torque and drag estimation for real-time drilling |
| CN110905409B (zh) * | 2019-11-28 | 2021-06-15 | 西安石大斯泰瑞油田技术有限公司 | 一种高钻速旋转导向系统实现高造斜率的方法 |
| RU2734915C2 (ru) * | 2020-01-17 | 2020-10-26 | Общество с ограниченной ответственностью "Интегра-Технологии" | Способ направленного бурения с коррекцией траектории скважины |
| CN111364976B (zh) * | 2020-04-02 | 2023-09-19 | 中国铁建重工集团股份有限公司 | 一种水平取芯钻机斜面钻头方位识别装置及系统 |
| RU2765025C1 (ru) * | 2021-02-01 | 2022-01-24 | Павел Михайлович Ведель | Способ бурения наклонно-направленной скважины и устройство для его осуществления |
| CN113216841B (zh) * | 2021-05-27 | 2022-06-24 | 河北锐石钻头制造有限公司 | 一种可自调节pdc钻头 |
Family Cites Families (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319649A (en) * | 1973-06-18 | 1982-03-16 | Jeter John D | Stabilizer |
| US4739843A (en) * | 1986-05-12 | 1988-04-26 | Sidewinder Tool Joint Venture | Apparatus for lateral drilling in oil and gas wells |
| US5265682A (en) * | 1991-06-25 | 1993-11-30 | Camco Drilling Group Limited | Steerable rotary drilling systems |
| US5553678A (en) * | 1991-08-30 | 1996-09-10 | Camco International Inc. | Modulated bias units for steerable rotary drilling systems |
| US5213168A (en) * | 1991-11-01 | 1993-05-25 | Amoco Corporation | Apparatus for drilling a curved subterranean borehole |
| CN2128666Y (zh) * | 1992-07-18 | 1993-03-24 | 石油大学(华东) | 径向水平钻井造斜装置 |
| US5332048A (en) * | 1992-10-23 | 1994-07-26 | Halliburton Company | Method and apparatus for automatic closed loop drilling system |
| GB9411228D0 (en) * | 1994-06-04 | 1994-07-27 | Camco Drilling Group Ltd | A modulated bias unit for rotary drilling |
| US5485889A (en) * | 1994-07-25 | 1996-01-23 | Sidekick Tools Inc. | Steering drill bit while drilling a bore hole |
| CN1145444A (zh) * | 1995-09-13 | 1997-03-19 | 霍华山 | 利用pdc钻头於井眼轨迹预测与控制的方法与系统 |
| GB9612524D0 (en) * | 1996-06-14 | 1996-08-14 | Anderson Charles A | Drilling apparatus |
| US6213226B1 (en) * | 1997-12-04 | 2001-04-10 | Halliburton Energy Services, Inc. | Directional drilling assembly and method |
| US6340063B1 (en) * | 1998-01-21 | 2002-01-22 | Halliburton Energy Services, Inc. | Steerable rotary directional drilling method |
| US6092610A (en) * | 1998-02-05 | 2000-07-25 | Schlumberger Technology Corporation | Actively controlled rotary steerable system and method for drilling wells |
| BE1012545A3 (fr) * | 1999-03-09 | 2000-12-05 | Security Dbs | Elargisseur de trou de forage. |
| US6308787B1 (en) * | 1999-09-24 | 2001-10-30 | Vermeer Manufacturing Company | Real-time control system and method for controlling an underground boring machine |
| US6601658B1 (en) * | 1999-11-10 | 2003-08-05 | Schlumberger Wcp Ltd | Control method for use with a steerable drilling system |
| US6438495B1 (en) * | 2000-05-26 | 2002-08-20 | Schlumberger Technology Corporation | Method for predicting the directional tendency of a drilling assembly in real-time |
| CA2345560C (en) * | 2000-11-03 | 2010-04-06 | Canadian Downhole Drill Systems Inc. | Rotary steerable drilling tool |
| WO2002036924A2 (en) * | 2000-11-03 | 2002-05-10 | Canadian Downhole Drill Systems Inc. | Rotary steerable drilling tool and method for directional drilling |
| DE60104082T2 (de) * | 2001-01-27 | 2005-07-28 | Camco International (Uk) Ltd., Stonehouse | Schneidstruktur für Bohrmeissel |
| US20030127252A1 (en) * | 2001-12-19 | 2003-07-10 | Geoff Downton | Motor Driven Hybrid Rotary Steerable System |
| US6732817B2 (en) * | 2002-02-19 | 2004-05-11 | Smith International, Inc. | Expandable underreamer/stabilizer |
| GB2418456B (en) * | 2003-06-23 | 2007-02-21 | Schlumberger Holdings | Inner and outer motor with eccentric stabilizser |
| US7287604B2 (en) * | 2003-09-15 | 2007-10-30 | Baker Hughes Incorporated | Steerable bit assembly and methods |
| US7306056B2 (en) * | 2003-11-05 | 2007-12-11 | Baker Hughes Incorporated | Directional cased hole side track method applying rotary closed loop system and casing mill |
| GB2408526B (en) * | 2003-11-26 | 2007-10-17 | Schlumberger Holdings | Steerable drilling system |
| BRPI0507122B1 (pt) * | 2004-01-28 | 2016-12-27 | Halliburton Energy Services Inc | engrenagem de vetor rotativo |
| GB0503742D0 (en) * | 2005-02-11 | 2005-03-30 | Hutton Richard | Rotary steerable directional drilling tool for drilling boreholes |
| GB2425790B (en) * | 2005-05-05 | 2010-09-01 | Schlumberger Holdings | Steerable drilling system |
| US8186458B2 (en) * | 2005-07-06 | 2012-05-29 | Smith International, Inc. | Expandable window milling bit and methods of milling a window in casing |
| GB0515394D0 (en) * | 2005-07-27 | 2005-08-31 | Schlumberger Holdings | Steerable drilling system |
| CN1966935A (zh) * | 2005-11-04 | 2007-05-23 | 普拉德研究及开发股份有限公司 | 根据相邻井筒来定位钻井套管的方法及装置 |
-
2008
- 2008-08-12 CN CN200880103169A patent/CN101778992A/zh active Pending
- 2008-08-12 WO PCT/GB2008/002707 patent/WO2009022116A1/en active Application Filing
- 2008-08-12 WO PCT/GB2008/002732 patent/WO2009022128A1/en active Application Filing
- 2008-08-12 CN CN201410032693.2A patent/CN103774990A/zh active Pending
- 2008-08-12 CN CN200880103209.3A patent/CN101784746B/zh not_active Expired - Fee Related
- 2008-08-12 MX MX2010001814A patent/MX340647B/es active IP Right Grant
- 2008-08-12 EA EA201070263A patent/EA017791B1/ru not_active IP Right Cessation
- 2008-08-12 EA EA201070265A patent/EA201070265A1/ru unknown
- 2008-08-12 MX MX2010001815A patent/MX341532B/es active IP Right Grant
- 2008-08-12 EP EP08788277A patent/EP2188484A1/de not_active Withdrawn
- 2008-08-12 EP EP08788278A patent/EP2176493A1/de not_active Withdrawn
- 2008-08-12 AU AU2008288343A patent/AU2008288343A1/en not_active Abandoned
- 2008-08-12 EP EP08788276A patent/EP2188483A1/de not_active Withdrawn
- 2008-08-12 WO PCT/GB2008/002706 patent/WO2009022115A1/en active Application Filing
- 2008-08-12 CN CN200880111782.9A patent/CN101827995B/zh not_active Expired - Fee Related
- 2008-08-12 CA CA2694858A patent/CA2694858C/en not_active Expired - Fee Related
- 2008-08-12 EA EA201070264A patent/EA019369B1/ru not_active IP Right Cessation
- 2008-08-12 CA CA2694977A patent/CA2694977A1/en not_active Abandoned
- 2008-08-12 EP EP08788301A patent/EP2176494A1/de not_active Withdrawn
- 2008-08-12 EA EA201070266A patent/EA018829B1/ru not_active IP Right Cessation
- 2008-08-12 WO PCT/GB2008/002705 patent/WO2009022114A1/en active Application Filing
- 2008-08-12 EA EA201070267A patent/EA018610B1/ru not_active IP Right Cessation
- 2008-08-12 MX MX2010001816A patent/MX337972B/es active IP Right Grant
- 2008-08-12 CA CA2694857A patent/CA2694857A1/en not_active Abandoned
- 2008-08-12 CN CN200880111732A patent/CN101827994A/zh active Pending
- 2008-08-12 MX MX2010001817A patent/MX2010001817A/es active IP Right Grant
- 2008-08-12 CA CA2694868A patent/CA2694868A1/en not_active Abandoned
- 2008-08-12 CN CN200880103153.1A patent/CN103299020B/zh not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2009022115A1 * |
Also Published As
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8757294B2 (en) | System and method for controlling a drilling system for drilling a borehole in an earth formation | |
| CA2694858C (en) | System and method for controlling a drilling system for drilling a borehole in an earth formation | |
| US8727036B2 (en) | System and method for drilling | |
| US8720605B2 (en) | System for directionally drilling a borehole with a rotary drilling system | |
| US8763726B2 (en) | Drill bit gauge pad control | |
| US8307914B2 (en) | Drill bits and methods of drilling curved boreholes | |
| EP2744967B1 (de) | Lenkbare drehanordnung zur verhinderung einer drehung gegen der uhrzeigersinn bei einer richtbohrung | |
| US8960329B2 (en) | Steerable piloted drill bit, drill system, and method of drilling curved boreholes | |
| US9080387B2 (en) | Directional wellbore control by pilot hole guidance | |
| EP2430277A1 (de) | Stochastische versatzsteuerung | |
| WO2010092314A1 (en) | Control systems and methods for temporary inhibition of side cutting | |
| WO2014041036A2 (en) | Steering system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20100125 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20160426 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20190817 |