NO941856L - Controllable drilling unit for attachment to the end of a drill string for drilling in a borehole in a subsurface formation - Google Patents

Controllable drilling unit for attachment to the end of a drill string for drilling in a borehole in a subsurface formation

Info

Publication number
NO941856L
NO941856L NO941856A NO941856A NO941856L NO 941856 L NO941856 L NO 941856L NO 941856 A NO941856 A NO 941856A NO 941856 A NO941856 A NO 941856A NO 941856 L NO941856 L NO 941856L
Authority
NO
Norway
Prior art keywords
drilling unit
borehole
swivel
drilling
drill
Prior art date
Application number
NO941856A
Other languages
Norwegian (no)
Other versions
NO941856D0 (en
Inventor
Joergen Hallunbaek
Original Assignee
Htc As
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 Htc As filed Critical Htc As
Publication of NO941856D0 publication Critical patent/NO941856D0/en
Publication of NO941856L publication Critical patent/NO941856L/en

Links

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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/004—Indexing systems for guiding relative movement between telescoping parts of downhole tools
    • E21B23/006—"J-slot" systems, i.e. lug and slot indexing mechanisms
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
    • 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
    • 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
    • E21B4/18—Anchoring or feeding in the borehole
    • 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
    • E21B7/067—Deflecting the direction of boreholes with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub

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)

Abstract

En styrbar boreenhet (l) for monter- ing på enden av en borestreng (11) tjener til å bore et horisontalt bore- hull (2) i en undergrunnsformasjon (3). Boreenheten omfatter en slammotor (12) og borkrone (4) drevet av slammotoren, og har en rotasjonsakse som danner en vinkel med aksen til boreenheten, såvel som en selvdreven drivenhet (8) for å drive boreenheten hovedsakelig i trans- lasjon i formasjonen og å utøve det nødvendige press på borekronen for bor- ingen, hvor drivenheten er utstyrt med drevne hjul (15) som blir presset mot veggen i borehullet av slamtrykket, og som trekkes fri fra borehullveggen når trykket utløses. En svivel (6) er satt inn mellom drivenheten (8) og slam- motoren (5), hvor sviveien omfatter, sett i strømningsretningen for slammet, suksessivt anordnede første og andre gjensidig roterbare sviveldeler (16 og 17). Sviveien omfatter dessuten en brems (21) for å motvirke rotasjon av de to sviveidelene i forhold til hverandre. Svivelen omfatter videre en koplings- anordning som er innrettet slik at den kan låse de to sviveldelene (16 og 17) sammen ved å variere strømmen av slam på en forutbestemt måte, og dermed bestemme om boreenheten skal bore rett frem eller endre retning.A controllable drilling unit (1) for mounting on the end of a drill string (11) serves to drill a horizontal borehole (2) into a subterranean formation (3). The drilling unit comprises a mud motor (12) and drill bit (4) driven by the mud motor, and has an axis of rotation which forms an angle with the axis of the drilling unit, as well as a self-propelled drive unit (8) for driving the drilling unit mainly in translation in the formation and exert the necessary pressure on the drill bit, where the drive unit is equipped with driven wheels (15) which are pressed against the wall of the borehole by the sludge pressure and which are pulled free from the borehole wall when the pressure is released. A swivel (6) is inserted between the drive unit (8) and the mud motor (5), wherein the swivel includes, in the direction of flow of the mud, successively arranged first and second mutually rotatable swivel parts (16 and 17). The stiffener further comprises a brake (21) to counteract rotation of the two stiffeners relative to each other. The swivel further comprises a coupling device which is arranged so that it can lock the two swivel parts (16 and 17) together by varying the flow of sludge in a predetermined manner, thus deciding whether the drilling unit should drill straight forward or change direction.

NO941856A 1991-11-19 1994-05-18 Controllable drilling unit for attachment to the end of a drill string for drilling in a borehole in a subsurface formation NO941856L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK188491A DK188491A (en) 1991-11-19 1991-11-19 CONTROLLABLE DRILLING EQUIPMENT TO DRILL A Borehole in an Underground Formation
PCT/DK1992/000341 WO1993010326A1 (en) 1991-11-19 1992-11-18 A steerable drilling assembly for mounting on the end of a drill string to drill a borehole in an underground formation

Publications (2)

Publication Number Publication Date
NO941856D0 NO941856D0 (en) 1994-05-18
NO941856L true NO941856L (en) 1994-07-15

Family

ID=8108796

Family Applications (1)

Application Number Title Priority Date Filing Date
NO941856A NO941856L (en) 1991-11-19 1994-05-18 Controllable drilling unit for attachment to the end of a drill string for drilling in a borehole in a subsurface formation

Country Status (6)

Country Link
EP (1) EP0612370A1 (en)
AU (1) AU3081292A (en)
CA (1) CA2123889A1 (en)
DK (1) DK188491A (en)
NO (1) NO941856L (en)
WO (1) WO1993010326A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK121295A (en) * 1995-10-30 1997-05-01 Dampskibsselskabet Svendborg & Drilling unit, coupling device for such drilling unit and method for drilling holes in the subsurface using the drilling unit
US5738178A (en) * 1995-11-17 1998-04-14 Baker Hughes Incorporated Method and apparatus for navigational drilling with a downhole motor employing independent drill string and bottomhole assembly rotary orientation and rotation
DE19620401C2 (en) * 1996-05-21 1998-06-10 Tracto Technik Steerable drilling device
US6142245A (en) * 1997-08-19 2000-11-07 Shell Oil Company Extended reach drilling system
US6607044B1 (en) * 1997-10-27 2003-08-19 Halliburton Energy Services, Inc. Three dimensional steerable system and method for steering bit to drill borehole
NO311100B1 (en) * 1999-10-26 2001-10-08 Bakke Technology As Apparatus for use in feeding a rotary downhole tool and using the apparatus
US6571888B2 (en) 2001-05-14 2003-06-03 Precision Drilling Technology Services Group, Inc. Apparatus and method for directional drilling with coiled tubing
US6994628B2 (en) 2003-01-28 2006-02-07 Boyd's Bit Service, Inc. Locking swivel apparatus with replaceable internal gear members
US6915865B2 (en) 2003-01-28 2005-07-12 Boyd's Bit Service, Inc. Locking swivel apparatus with a supplemental internal locking mechanism
AU2011202827B2 (en) * 2005-04-15 2014-03-27 Tercel Ip Limited Method of running downhole apparatus into a wellbore with a swivel sub
GB0507639D0 (en) 2005-04-15 2005-05-25 Caledus Ltd Downhole swivel sub
US9038747B2 (en) 2011-06-20 2015-05-26 David L. Abney, Inc. Adjustable bent drilling tool having in situ drilling direction change capability
CN110984877A (en) * 2019-12-24 2020-04-10 青岛度丘新能源技术有限公司 Drill rod capable of transversely operating

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH630700A5 (en) * 1978-07-24 1982-06-30 Inst Francais Du Petrole VARIABLE ANGLE ELBOW CONNECTION FOR DIRECTED DRILLING.
US4492276A (en) * 1982-11-17 1985-01-08 Shell Oil Company Down-hole drilling motor and method for directional drilling of boreholes
US4674579A (en) * 1985-03-07 1987-06-23 Flowmole Corporation Method and apparatus for installment of underground utilities

Also Published As

Publication number Publication date
AU3081292A (en) 1993-06-15
DK188491D0 (en) 1991-11-19
WO1993010326A1 (en) 1993-05-27
EP0612370A1 (en) 1994-08-31
NO941856D0 (en) 1994-05-18
DK188491A (en) 1993-05-20
CA2123889A1 (en) 1993-05-27

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