EP0436046A1 - Dispositif amortisseur pour une colonne de forage carottier à l'endroit de forage - Google Patents

Dispositif amortisseur pour une colonne de forage carottier à l'endroit de forage Download PDF

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Publication number
EP0436046A1
EP0436046A1 EP90100028A EP90100028A EP0436046A1 EP 0436046 A1 EP0436046 A1 EP 0436046A1 EP 90100028 A EP90100028 A EP 90100028A EP 90100028 A EP90100028 A EP 90100028A EP 0436046 A1 EP0436046 A1 EP 0436046A1
Authority
EP
European Patent Office
Prior art keywords
face
transition piece
drill string
drillstring
drill
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Withdrawn
Application number
EP90100028A
Other languages
German (de)
English (en)
Inventor
Nikolay Dimitrov Dipl.-Ing. Nenkov
Dimo Stoyanov Dipl.-Ing. Yordanov
Peter Vladimirov Dipl.-Ing. Nedyalkov
Evgeni Dmitrievich Dipl.-Ing. Hromin
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.)
Geologoprouchvatelno Predpriatie
Original Assignee
Geologoprouchvatelno Predpriatie
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 Geologoprouchvatelno Predpriatie filed Critical Geologoprouchvatelno Predpriatie
Priority to EP90100028A priority Critical patent/EP0436046A1/fr
Priority to US07/460,775 priority patent/US5083755A/en
Publication of EP0436046A1 publication Critical patent/EP0436046A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers

Definitions

  • the invention relates to a damping device for a core drill string arranged on the extraction site, which has a hollow cylindrical housing which is connected on one end face to a transition piece on the drill string side and on the other end face to a transition piece on the drill tool side.
  • damping devices are used in core receiving tubes in front of the drilling tool or stone breaking tool for drilling massive ores.
  • a damping device which has a cylindrical transition piece on the drill string side, into which an internal thread is cut at both ends.
  • the drill string-side transition piece is connected to the external thread of a spindle by its internal thread on the drilling tool side.
  • the transition piece also has a step-shaped external thread on the drill string side. Wedge springs are inserted in the grooves in the step on the drilling tool side. These wedge springs protrude into seats in one with two shoulders provided nut, which comprises the drill-side step of the drill string-side transition piece and is connected to a housing by means of a thread.
  • a drill string-side ring is freely arranged between the inner wall of the housing and the spindle, on which the end of the drill string-side transition piece rests on the drill tool side.
  • the interior between the housing, the drill string side ring, the spindle and a drill tool side ring forms a working chamber.
  • This working chamber is divided into individual sections by intermediate bushings.
  • a spherical head of the spindle is arranged in each section. The sections are all filled with active elements in the form of spheres.
  • the ring on the drilling tool side which forms the movable floor of the working chamber, rests on slotted springs of different lengths arranged concentrically one inside the other. These springs in turn lie on an annular nut, below which there is a transition piece on the drilling tool side, these two components being connected to the housing by means of threads.
  • the known damping device has a small inner diameter, which impairs the uniform feed of the drill pipe and the size of the core that can be obtained.
  • the damping device is axially relatively long and complicated in construction. The damping capacity is insufficient.
  • the object underlying the invention is therefore to design the damping device of the generic type in such a way that it dampens longitudinal vibrations in a wide range with a simple structure and without changing the outside and inside diameter of the drill pipe.
  • the drill string-side transition piece has an external thread on the drill tool side for connection to an internal thread in the housing, that forehead fingers are formed on the housing at its drill-tool end, which engage with end fingers on the drill-string end of the drill-tool transition piece, that outer spring rings and inner spring rings are arranged in the interior of the housing, which together form a spring assembly that the spring assembly with its drill string end face is in contact with the drill tool end face of the drill string transition piece and rests with its drill end face on the drill string end face of a spacer bushing, that the spacer bush with its drill end face on the drill string end face of a drill piece on the inside transition piece projecting shoulder rests that an annular surface on the drill tool side of the inwardly projecting shoulder is in contact with an annular surface on a drill string side n outer shoulder stands on a cylindrical limiting bush arranged within the spring assembly and that the limiting bush is connected to an internal thread on the drill string-side transition piece via an external thread
  • the axial pressure of the drill pipe is transmitted to the drilling tool via the transition piece on the drill string side, the spring assembly and the transition piece on the drilling tool side.
  • the torque is transmitted from the drill string through the transition piece on the drill string side and the housing through the engagement of the forehead fingers to the drilling tool.
  • the forces that arise when the core is torn loose are absorbed by the limiting bush.
  • the longitudinal vibrations during drilling are dampened by a radial deformation of the outer spring washers and the inner spring washers as well as by the friction caused by the axial pressure between the contact surfaces.
  • a drill string 1 is provided with an internal thread at its end on the drilling tool side.
  • An external thread 2 of a hollow cylindrical transition piece 3 on the drill string side is screwed into this internal thread.
  • the transition piece 3 has at its end on the drill tool side an external thread 4 with which it is screwed into an internal thread on the end of a housing 5 on the drill string side.
  • the housing 5 is hollow cylindrical. Its end on the drilling tool side is thickened and provided with end fingers 6. These end fingers 6 are in the engagement with end fingers 7 shown in the drawing at the drill string end of a drill tool-side transition piece 8 which has a smooth cylindrical outer surface and a stepped inner surface.
  • the transition piece 8 on the drilling tool side is provided with an internal thread 9, with which an external thread of a stone-breaking tool or drilling tool 10 is in threaded engagement.
  • Outer spring rings 11 and inner spring rings 12 are arranged in the cylindrical interior of the housing 5, which together form a spring assembly 13.
  • the outer spring rings 11 have a cylindrical outer surface and a double-conical inner surface.
  • the inner spring rings 12 have a cylindrical inner surface and a double-conical outer surface, the inner surfaces of the outer spring rings 11 projecting into the outer surfaces of the inner spring rings 12 by a corresponding complementary design.
  • the end of the spring assembly 13 on the drill string side projects with the end face of the drill string side on the drill tool side 3 in contact. With its end on the drilling tool side, the spring assembly 13 rests on a support shoulder of a cylindrical spacer bush 15. With the end face on the drilling tool side, the spacer bush 15 rests on an inwardly projecting shoulder 16 of the transition piece 8 on the drilling tool side.
  • This shoulder 16 projecting inwards has an annular surface 17 on the drilling tool side, with which the annular surface on an outer shoulder 18 on the drill string side is in contact with a cylindrical limiting bush 19 arranged within the spring assembly 13.
  • the cylindrical limiting bushing 19 is connected via an external thread formed on its end on the drill string side to an internal thread 20 on the transition piece 3 on the drill string side.
  • a radial space is formed between the outer surface and the inner surface of the spring assembly 13 and the associated cylindrical surfaces of the housing 5 or the limiting bush 19.
  • the damping device transmits the axial pressure from the drill pipe 1 to the transition piece 3 on the drill string side, the spring assembly 13 and the transition piece 8 on the drill tool side to the drilling tool 10.
  • the torque is transmitted from the drill string 1 via the transition piece 3 on the drill string side and the housing 5 to the drilling tool 1o via the engaging end fingers 6 and 7.
  • the forces generated when the core is torn loose are absorbed by the limiting bush 19.

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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP90100028A 1990-01-02 1990-01-02 Dispositif amortisseur pour une colonne de forage carottier à l'endroit de forage Withdrawn EP0436046A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP90100028A EP0436046A1 (fr) 1990-01-02 1990-01-02 Dispositif amortisseur pour une colonne de forage carottier à l'endroit de forage
US07/460,775 US5083755A (en) 1990-01-02 1990-01-04 Face shock absorber for extracting core-collecting pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90100028A EP0436046A1 (fr) 1990-01-02 1990-01-02 Dispositif amortisseur pour une colonne de forage carottier à l'endroit de forage

Publications (1)

Publication Number Publication Date
EP0436046A1 true EP0436046A1 (fr) 1991-07-10

Family

ID=8203448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100028A Withdrawn EP0436046A1 (fr) 1990-01-02 1990-01-02 Dispositif amortisseur pour une colonne de forage carottier à l'endroit de forage

Country Status (2)

Country Link
US (1) US5083755A (fr)
EP (1) EP0436046A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0708225A1 (fr) * 1994-10-21 1996-04-24 Bauer Spezialtiefbau GmbH Elément d'amortissement pour un foret à extension télescopique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6513800B1 (en) * 2001-07-10 2003-02-04 Enidine Inc. Mechanical double acting shock isolator
US7779932B2 (en) * 2007-10-22 2010-08-24 Longyear Tm, Inc. Drill-string shock absorbers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660990A (en) * 1970-02-27 1972-05-09 Donald L Zerb Vibration damper
DE2313557A1 (de) * 1973-03-19 1974-10-17 Oil Patch Ind Ltd Stossdaempfer fuer bohrgestaenge
US4246765A (en) * 1979-01-08 1981-01-27 Nl Industries, Inc. Shock absorbing subassembly
US4254837A (en) * 1979-04-12 1981-03-10 Mustang Tripsaver Inc. Technique for damping oscillations in a drill string
US4466496A (en) * 1979-07-16 1984-08-21 Mustang Trip Saver, Inc. Technique for damping oscillations in a drill string

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254508A (en) * 1963-09-18 1966-06-07 Drilco Oil Tools Inc Resilient unit for drill strings
GB2093188B (en) * 1981-02-17 1984-09-05 Vsesojuznyj Kardiologitsches Positioning echosignal sensor and electrosignal sensors of cardiographic apparatus
US4494615A (en) * 1981-10-23 1985-01-22 Mustang Tripsaver, Inc. Jarring tool
GB8611091D0 (en) * 1986-05-07 1986-06-11 Ennis M S J Borehole drill construction
SE467366B (sv) * 1987-05-14 1992-07-06 Geologoproutshvatelno Predpr Stoetabsorberingsanordning vid borrning foer geologiskt prospekteringsarbete

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660990A (en) * 1970-02-27 1972-05-09 Donald L Zerb Vibration damper
DE2313557A1 (de) * 1973-03-19 1974-10-17 Oil Patch Ind Ltd Stossdaempfer fuer bohrgestaenge
US4246765A (en) * 1979-01-08 1981-01-27 Nl Industries, Inc. Shock absorbing subassembly
US4254837A (en) * 1979-04-12 1981-03-10 Mustang Tripsaver Inc. Technique for damping oscillations in a drill string
US4466496A (en) * 1979-07-16 1984-08-21 Mustang Trip Saver, Inc. Technique for damping oscillations in a drill string

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0708225A1 (fr) * 1994-10-21 1996-04-24 Bauer Spezialtiefbau GmbH Elément d'amortissement pour un foret à extension télescopique

Also Published As

Publication number Publication date
US5083755A (en) 1992-01-28

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