EP0352427B1 - Bohrwerkzeug - Google Patents

Bohrwerkzeug Download PDF

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Publication number
EP0352427B1
EP0352427B1 EP89109334A EP89109334A EP0352427B1 EP 0352427 B1 EP0352427 B1 EP 0352427B1 EP 89109334 A EP89109334 A EP 89109334A EP 89109334 A EP89109334 A EP 89109334A EP 0352427 B1 EP0352427 B1 EP 0352427B1
Authority
EP
European Patent Office
Prior art keywords
drilling
core
drilling tool
component unit
rock
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.)
Expired - Lifetime
Application number
EP89109334A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0352427A3 (de
EP0352427A2 (de
Inventor
Rainer Dr.-Ing. Jürgens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes Oilfield Operations LLC
Original Assignee
Eastman Teleco Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eastman Teleco Co filed Critical Eastman Teleco Co
Publication of EP0352427A2 publication Critical patent/EP0352427A2/de
Publication of EP0352427A3 publication Critical patent/EP0352427A3/de
Application granted granted Critical
Publication of EP0352427B1 publication Critical patent/EP0352427B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
    • E21B25/04—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe the core receiver having a core forming cutting edge or element, e.g. punch type core barrels
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/02—Fluid rotary type drives

Definitions

  • the invention relates to a drilling tool in an embodiment according to the preamble of claim 1, as is known from the older German patent application P 37 01 914.7.
  • the invention has for its object to provide a drilling tool that facilitates and accelerates the drilling of stone cores and reduces the cost of obtaining rock samples.
  • the invention also aims to provide a simplified and cheaper method for obtaining rock samples, and it achieves this object with the features of claim 6. With regard to further refinements of the method, reference is made to claims 7 to 9.
  • the invention enables rock samples to be obtained over a considerable depth of formation without the main borehole having to be drilled after each drilling of a rock core.
  • a core hole with a usually much smaller diameter can extend beyond the bottom of the main hole for a length of, for example, one hundred or more meters are driven without having to carry out additional drilling in the meantime.
  • the drilling is stopped due to the information provided by the rock samples, there is no need to re-drill, which saves considerable costs.
  • the core borehole produced in a core drilling process of the type according to the invention receives a continuous course because the unchanged position of the outer tube of the drilling tool supporting the core drilling device means that the core bores run under constant conditions.
  • the outer tube of the drilling tool forms a kind of underground replacement for a shutdown rotary table.
  • the insertion of an extension piece in the assembly to be drawn up after each core extraction is extremely simple and quick to carry out, and when removing the extension pieces inserted one after the other after completion of a core drilling process and before re-drilling the main bore, groups of extension pieces can be removed and independently of the unit to be used again be screwed apart.
  • the extraction of rock samples according to the invention also makes it possible not only to use the conventional drill bit formed by a roller chisel for re-drilling the main bore, but instead to use a rotary drill bit designed as a solid drilling tool as part of the drilling tool, which combines higher drilling performance with far greater stability and is suitable, save every second round trip required when using drill bits for re-drilling.
  • the drilling tool shown in Fig. 1 has an outer tube 1 which can be connected to a drill string, not shown. At the lower end, a roller drill bit 2 is attached, which is used to drill an annular space or the main drill hole for repositioning the outer tube 1.
  • a structural unit 3 consisting of a motor 4 and a core drilling device 5. This structural unit 3 is axially displaceable. While the motor 4 is secured against rotating, the core drilling device 5 is rotatably arranged.
  • the core drilling device 5 itself consists of a core tube 7 carrying a drill bit 6 and an inner tube 8 rotatably supported therein.
  • a drilling fluid distributor 9 is arranged between the motor 4 and the core drilling device 5, which distributes the drilling fluid emerging from the motor 4 into a first flow, which is between the outer tube 1 and the core tube 7 flows, and divides into a further stream between the core tube 7 and the inner tube 8.
  • the current flowing between the outer tube 1 and the core tube 7 is controlled by a spring-loaded valve 10 so that it remains the same despite decreasing throttling action of the flow path due to increasing exposure of the core drilling device 5.
  • the motor 4 is provided with a collar 11 which fills the annular space between its housing and the outer tube 1.
  • the collar 11 is sealed with respect to the outer tube 1 and, with further housing areas of the motor 4, forms partial areas which are the cross-sectional area fill an inner passage area 12 of the outer tube 1.
  • a catching device 13 is provided, which is used to pull out the entire structural unit 3 after drilling a core.
  • the catching device 13 serves as a means for adjusting the axial feed force by opposing the core drilling device 5 with a retaining force which is fed to it via a cable 14 leading through the drill string by means of a winch located on the drilling tower.
  • values between a maximum value and zero can be set for the resulting axial feed force. The maximum value is obtained when the axial feed force is determined at an undiminished level by the drilling fluid pressure above the assembly 3 in connection with the reaction surfaces.
  • the outer tube 1 is provided in its upper region with a longitudinal groove profile 30 illustrated at 30. Near its upper end, the structural unit 3 has a wedge region 31 which is in rotationally locking engagement with the longitudinal groove region 30 of the outer tube 1.
  • connection means 32, 33 and 34, 35 which, as in the exemplary embodiments shown, are preferably designed as screw threads.
  • the parts of the assembly can either be directly connected via their connecting means 32, 33 or 34, 35 or connected via extension pieces 36 or 37, which are preferably designed as tubular bodies and are provided with corresponding connecting means at their ends.
  • the separation point between the catching device 13 and the upper end of the motor 4, but there is also the possibility of the separation point 2 in the upper region of the core drill pipe 7 between its connection to the motor 4 and the bearing device 38 for the inner pipe 8.
  • the length of the extension pieces 36 and 37 shown broken off preferably corresponds at least substantially to the length of the core receiving space of the inner tube 8.
  • extension pieces 36 and 37 can be interposed between the connection means 32, 33 and 34, 35, so that during a core drilling process a corresponding number of rock cores can be drilled and brought to light in immediate succession until a re-drilling the main hole is required.
  • the number of interchangeable extension pieces 36; 37 and thus the length of a drivable core borehole essentially depends on material strength, type of rock formations and, if applicable, the length over which a main bore can be drilled using the drill bit 2 or a solid drilling tool used instead of this, until a round trip is required for the entire drill string due to wear of the drill bit or the rotary drill bit used as a solid drilling tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
EP89109334A 1988-07-25 1989-05-24 Bohrwerkzeug Expired - Lifetime EP0352427B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3825225A DE3825225A1 (de) 1988-07-25 1988-07-25 Bohrwerkzeug
DE3825225 1988-07-25

Publications (3)

Publication Number Publication Date
EP0352427A2 EP0352427A2 (de) 1990-01-31
EP0352427A3 EP0352427A3 (de) 1991-05-15
EP0352427B1 true EP0352427B1 (de) 1994-03-02

Family

ID=6359498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109334A Expired - Lifetime EP0352427B1 (de) 1988-07-25 1989-05-24 Bohrwerkzeug

Country Status (4)

Country Link
US (1) US4969528A (enrdf_load_stackoverflow)
EP (1) EP0352427B1 (enrdf_load_stackoverflow)
CA (1) CA1320944C (enrdf_load_stackoverflow)
DE (1) DE3825225A1 (enrdf_load_stackoverflow)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902869C1 (enrdf_load_stackoverflow) * 1989-02-01 1990-04-12 Eastman Christensen Co., Salt Lake City, Utah, Us
NL1016545C2 (nl) * 2000-11-03 2002-05-07 Fugro Eng Bv Een roteerbare kernboorinrichting en een roteerbaar kernboorsysteem uitgevoerd met een dergelijke roteerbare kernboorinrichting.
US6729416B2 (en) 2001-04-11 2004-05-04 Schlumberger Technology Corporation Method and apparatus for retaining a core sample within a coring tool
DE20107024U1 (de) * 2001-04-24 2001-07-26 Hilti Ag, Schaan Werkzeug zum Entfernen eines Bohrkernes
RU2224926C2 (ru) * 2002-03-13 2004-02-27 Ивано-Франковский национальный технический университет нефти и газа Двухступенчатый ленточно-колодочный тормоз
US7431107B2 (en) * 2003-01-22 2008-10-07 Schlumberger Technology Corporation Coring bit with uncoupled sleeve
US7562725B1 (en) * 2003-07-10 2009-07-21 Broussard Edwin J Downhole pilot bit and reamer with maximized mud motor dimensions
US20050133267A1 (en) * 2003-12-18 2005-06-23 Schlumberger Technology Corporation [coring tool with retention device]
US7762328B2 (en) * 2006-09-29 2010-07-27 Baker Hughes Corporation Formation testing and sampling tool including a coring device
CN101769135B (zh) * 2010-01-07 2012-10-17 中国地质大学（武汉） 水平井取心钻具堵塞球装置
EP2569504B1 (en) * 2010-02-03 2019-11-06 1461160 Alberta Ltd System and method for conducting drilling and coring operations
US8499856B2 (en) * 2010-07-19 2013-08-06 Baker Hughes Incorporated Small core generation and analysis at-bit as LWD tool
US8613330B2 (en) 2011-07-05 2013-12-24 Schlumberger Technology Corporation Coring tools and related methods
CA2857841C (en) 2013-07-26 2018-03-13 National Oilwell DHT, L.P. Downhole activation assembly with sleeve valve and method of using same
US9494004B2 (en) 2013-12-20 2016-11-15 National Oilwell Varco, L.P. Adjustable coring assembly and method of using same
US11506001B2 (en) 2020-12-31 2022-11-22 Rus-Tec Engineering, Ltd. System and method of obtaining formation samples using coiled tubing
CN115680481B (zh) * 2022-10-13 2025-05-27 贵州远东兄弟钻探有限公司 一种动力头自动开关的全液压钻机及其系统

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898086A (en) * 1954-12-02 1959-08-04 Jersey Prod Res Co Method of drilling
US2910273A (en) * 1956-01-19 1959-10-27 Neyrpic Ets Corer for turbine driven well drilling units
US2915285A (en) * 1956-05-23 1959-12-01 Jersey Prod Res Co Coring subterranean formations
US2944792A (en) * 1956-05-28 1960-07-12 Neyrpic Ets Turbines for drilling and coring
US3485310A (en) * 1968-01-22 1969-12-23 Vincent Milosevich Wire line core barrel apparatus
US3903975A (en) * 1972-08-23 1975-09-09 Tigre Tierra Drilling apparatus with down-the-hole motor
US3990524A (en) * 1974-06-03 1976-11-09 Tigre Tierra, Inc. Down-the-hole motor for rotary drill rod and process for drilling using the same
DE2919007C2 (de) * 1979-05-11 1982-07-22 Christensen, Inc., 84115 Salt Lake City, Utah Kernbohreinrichtung für Gesteinsbohrlöcher
US4518050A (en) * 1983-06-30 1985-05-21 Chevron Research Company Rotating double barrel core sampler
DE3613265A1 (de) * 1986-04-19 1987-10-22 Christensen Inc Norton Kernbohrwerkzeug fuer gesteinsbohrungen
DE3701914C1 (de) * 1987-01-23 1988-05-19 Eastman Christensen Co Direktangetriebenes Kernbohrwerkzeug
DE3729138A1 (de) * 1987-09-01 1989-04-20 Bergbau Bohrgesellschaft Rhein Verfahren und bohranlage zum herstellen untertaegiger querbohrungen, insbesondere horizontaler kernbohrungen zum gewinnen von bodenproben, von uebertage

Also Published As

Publication number Publication date
US4969528A (en) 1990-11-13
EP0352427A3 (de) 1991-05-15
CA1320944C (en) 1993-08-03
DE3825225C2 (enrdf_load_stackoverflow) 1991-05-23
DE3825225A1 (de) 1990-02-01
EP0352427A2 (de) 1990-01-31

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