EP0486752A1 - Zielbohrstange mit einer Rohrwellenlagerung - Google Patents

Zielbohrstange mit einer Rohrwellenlagerung Download PDF

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Publication number
EP0486752A1
EP0486752A1 EP91106103A EP91106103A EP0486752A1 EP 0486752 A1 EP0486752 A1 EP 0486752A1 EP 91106103 A EP91106103 A EP 91106103A EP 91106103 A EP91106103 A EP 91106103A EP 0486752 A1 EP0486752 A1 EP 0486752A1
Authority
EP
European Patent Office
Prior art keywords
ring
piston
rings
drilling
cylinder
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Withdrawn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
EP91106103A
Other languages
German (de)
English (en)
French (fr)
Inventor
Klaus-Dieter Schwidder
Udo Weber
Paul Braun
Heinz Wallusek
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.)
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and Co
Original Assignee
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and 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 Bergwerksverband GmbH, Schwing Hydraulik Elektronik GmbH and Co filed Critical Bergwerksverband GmbH
Publication of EP0486752A1 publication Critical patent/EP0486752A1/de
Withdrawn legal-status Critical Current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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/003—Bearing, sealing, lubricating details
    • 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
    • E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
    • E21B17/1064—Pipes or rods with a relatively rotating sleeve
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
    • E21B47/20—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry by modulation of mud waves, e.g. by continuous modulation
    • 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
    • E21B7/062—Deflecting the direction of boreholes the tool shaft rotating inside a non-rotating guide travelling with the shaft

Definitions

  • the invention relates to a target boring bar according to the preamble of claim 1.
  • Such target boring bars are set up to
  • such a target boring bar forms a drill pipe, which is usually installed as the last drill pipe in front of the drill bit in the drill string and with the aid of hydraulically driven swivel bars, which are supported on the borehole wall, transmits correction torques to the drill shaft, which are connected in a rotationally fixed manner to the drilling tool is. These correction moments cancel out the forces that deflect the drilling tool and thus the drilling from the specified drilling direction.
  • the tubular shaft bearing ensures that the concentrically outer tube cannot rotate with the boring shaft, so that the correction strips only slide axially on the borehole joints with increasing drilling depth.
  • the invention relates in particular to the mounting of the concentrically outer tube on the inner tube serving as the drilling shaft, which has a channel for the descending drilling fluid is provided, which emerges via the drilling tool and forms an ascending stream of the drilling fluid surrounding the outer tube, which discharges the dissolved material upward from the borehole.
  • This is a front shaft bearing associated with the drilling tool and a rear shaft bearing, so that the drilling shaft bearing supports the concentrically outer tube on both ends of the drilling shaft. Since the two shaft bearings can differ from one another in details, however, because of the same main points of view that apply to both bearings, the essential details can be the same, the invention is described in more detail below with reference to one of the two bearings.
  • the rear shaft bearing is used to describe the invention, because the sealing problems that occur there are comparatively more difficult, since the front bearing is a combination of axial and radial roller bearings, while the rear shaft bearing only requires a radial roller bearing.
  • the invention particularly relates to the sealing of this rear roller bearing of the drilling shaft bearing.
  • This seal is of considerable importance for trouble-free operation because it must be ensured that the rolling bearing does not leak and the concentric outer tube, which carries the described correction device, blocks on the drilling shaft, which would result in the target device being put out of operation and their mechanical part is destroyed.
  • this seal must ensure that the rolling bearing is lubricated, on the other hand, it must prevent solid parts contained in the ascending drilling fluid from getting into the bearing and causing damage there can.
  • the seal must also work if it comes under the increasing hydrostatic pressure of the rising drilling sludge, which is particularly problematic if deep wells are planned that are planned to be up to 14000 m and more beyond the depths of approx will. The invention is based on this problem.
  • the invention has for its object to provide a target boring bar, the roller bearings at least the rear shaft bearing regardless of the respective borehole depth are supplied with a suitable lubricant.
  • the rolling bearing in question receives permanent lubrication, i.e. it is supplied with a self-sufficient lubricant in the form of an air-free oil of suitable viscosity that is independent of the lubricating properties of the borehole mud, but is loaded with the hydrostatic pressure of the drilling fluid via an annular piston.
  • the permanent lubrication is practically independent of the borehole cloud under a pressure that is equal to the hydrostatic external pressure to which the target drill rod, i.e. her outer tube is exposed. It is thereby achieved that the hydrostatic pressure of the borehole drilling cannot deform the shaft bearing and thereby destroy it, without the flushing liquid being able to get into the bearing itself.
  • the pressure equalization achieved thereby takes place through the radial gap, in which the radial seal keeps the ascending drilling fluid away from the annular piston, but loads it via the liquid filling with the hydrostatic pressure of the ascending flow of the drilling fluid.
  • the invention has the advantage that, on the one hand, it enables virtually complete pressure relief of the drilling shaft bearing, without, on the other hand to bring their roller bearings and the moving parts, which are particularly sensitive to dirt, into contact with the drilling fluid. In this way, the permanent lubrication under pressure maintains its lubricating properties and thereby prevents premature failure of the rolling bearings.
  • the invention ensures that the ring cylinder as such can be accommodated in the concentric outer tube which does not rotate during drilling, but that the gap which is set against the drilling shaft and the ring cylinder is also lubricated and sealed. This is done with the lubricant of the permanent lubrication and also enables easier assembly.
  • the features of claim 4 ensure an expedient transfer of the pressure of the upcoming drilling mud to the permanent lubrication of the rolling bearing.
  • the multi-part seal provided for this purpose is relatively easy to assemble and ensures a reliable seal of the pressure-transmitting liquid filling against the external drilling fluid.
  • the drawing shows a partial section through a target boring bar according to the invention.
  • the drawing shows the rear bearing of the drilling shaft.
  • the sectional drawing is interrupted in the middle of the shaft and shows the drilling shaft (1) and the concentrically outer tube (2) surrounding it in a broken view.
  • the inner race (5) of a roller bearing (6) which is designed as a needle bearing, is axially supported on a shoulder (4) of the drilling shaft.
  • the outer race (7) is supported on a shoulder (8) inside the outer tube (2).
  • the inner bearing ring (5) is fastened with a wedge (9) which is supported on a shaft bushing (10) and an outer ring (11) which is screwed at (12) to a shoulder of the outer tube (2).
  • One or more axial channels (14) establish a fluid connection to an annular space (15) which is filled with the lubricant of a permanent lubrication of the rolling bearing (6).
  • annular piston (17) is overhung in an annular cylinder.
  • the forward piston area closes off an annular space (18) which can be filled with the lubricant of the permanent lubrication through an axial bore (19) and a radial bore (20) which is sealed liquid-tight by a screw.
  • the piston surface which closes the annular space (18) is formed by a piston ring (21) which is held in the interior of the annular piston (17) by a snap ring (22).
  • Stuffing boxes (23, 24) are used for the inner sealing of the ring piston (17), while an O-ring seal (25) is used for the outer sealing of the ring piston.
  • the ring cylinder (16) is in several parts. It consists of a concentrically outer cylinder liner (26) and a concentric inner cylinder liner (27).
  • the cylinder liner (27) has a radial flange (28) which is screwed to a sealing seat ring (29), as shown at (30).
  • a corresponding seat ring (31) is screwed to the rear ring surface of the concentrically outer cylinder liner at (32).
  • the seat rings which are non-rotatably connected to the ring cylinder (16), delimit an annular gap (33) with their mutually facing end faces. This is stored with a multi-part sealing arrangement at its lower end, which is shown in the enlarged partial view of the drawing.
  • the parts are assembled starting with the roller bearing (6) and determined by the parts (9-11). Then the cylinder liners (26, 27) are assembled and the ring piston with its seals (23, 24, 25) and its piston ring (21) is assembled, the gap seal described being produced. As soon as this assembly is completed, the permanent lubrication is filled in via the radial channel (21) by means of a vacuum pump connected to the grease nipple (43) until the filling quantity is reached. Then the filling opening is closed with the screw of the radial channel (21) and the Pump at lubrication nipple (43) removed. The liquid filling in the rooms (39 and 40) which serves to convey the pressure of the borehole flushing can be introduced through the annular gap (33).
  • the drilling shaft (1) rotates, while the outer tube (2) with the ring cylinder (16) connected to it in a rotationally fixed manner does not follow the rotation, but only moves downwards with the target boring bar in accordance with the drilling progress.
  • a pipe section (43) is connected to the flange (28) and covers a radial bore (44) which is connected to the rising flow of the drilling fluid via a radial axial bore (45).
  • the bore (44) connects to the descending flow of drilling fluid. This makes it possible to transmit signals via the drilling slurry which data from the deepest borehole are transmitted to the surface of the day in the form of telegrams.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
EP91106103A 1990-11-23 1991-04-17 Zielbohrstange mit einer Rohrwellenlagerung Withdrawn EP0486752A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4037261A DE4037261A1 (de) 1990-11-23 1990-11-23 Zielbohrstange mit einer rohrwellenlagerung
DE4037261 1990-11-23

Publications (1)

Publication Number Publication Date
EP0486752A1 true EP0486752A1 (de) 1992-05-27

Family

ID=6418775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106103A Withdrawn EP0486752A1 (de) 1990-11-23 1991-04-17 Zielbohrstange mit einer Rohrwellenlagerung

Country Status (2)

Country Link
EP (1) EP0486752A1 (enrdf_load_stackoverflow)
DE (1) DE4037261A1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1632636A1 (en) * 2004-09-03 2006-03-08 Sandvik Tamrock Oy Rock breaking machine and lubricating method
US7900748B2 (en) 2005-04-27 2011-03-08 Caterpillar Inc Lubrication system for a hydraulic or pneumatic tool
US8689940B2 (en) 2010-08-19 2014-04-08 Caterpillar Inc. Lubrication system for a breaking tool
US9010493B2 (en) 2012-03-13 2015-04-21 Caterpillar Inc. Lubrication arrangement
US9217341B2 (en) 2013-08-15 2015-12-22 Caterpillar Inc. Lubrication system for tool
CN109707315A (zh) * 2019-03-12 2019-05-03 张成功 一种钻井增速动力夯机用的轴承
CN118339361A (zh) * 2021-12-03 2024-07-12 沙特阿拉伯石油公司 具有可溶解滚珠轴承的井下致动系统和方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104134A (en) * 1961-05-05 1963-09-17 Dale E Nielsen Non-rotating drill guide assembly
US4225000A (en) * 1978-09-11 1980-09-30 Maurer Engineering Inc. Down hole drilling motor with pressure balanced bearing seals
US4593774A (en) * 1985-01-18 1986-06-10 Geo Max Drill Corp. Downhole bearing assembly
US4606417A (en) * 1985-04-08 1986-08-19 Webb Derrel D Pressure equalized stabilizer apparatus for drill string
WO1988010355A1 (en) * 1987-06-16 1988-12-29 Preussag Aktiengesellschaft Device for guiding a drilling tool and/or pipe string
EP0324870A1 (de) * 1988-01-19 1989-07-26 SCHWING HYDRAULIK ELEKTRONIK GMBH & CO. Selbststeuerndes Gestängerohr für rotierende Bohrgestänge von Gesteinsbohrmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104134A (en) * 1961-05-05 1963-09-17 Dale E Nielsen Non-rotating drill guide assembly
US4225000A (en) * 1978-09-11 1980-09-30 Maurer Engineering Inc. Down hole drilling motor with pressure balanced bearing seals
US4593774A (en) * 1985-01-18 1986-06-10 Geo Max Drill Corp. Downhole bearing assembly
US4606417A (en) * 1985-04-08 1986-08-19 Webb Derrel D Pressure equalized stabilizer apparatus for drill string
WO1988010355A1 (en) * 1987-06-16 1988-12-29 Preussag Aktiengesellschaft Device for guiding a drilling tool and/or pipe string
EP0324870A1 (de) * 1988-01-19 1989-07-26 SCHWING HYDRAULIK ELEKTRONIK GMBH & CO. Selbststeuerndes Gestängerohr für rotierende Bohrgestänge von Gesteinsbohrmaschinen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1632636A1 (en) * 2004-09-03 2006-03-08 Sandvik Tamrock Oy Rock breaking machine and lubricating method
US7694748B2 (en) 2004-09-03 2010-04-13 Sandvik Mining And Construction Oy Rock breaking machine and lubricating method
US7900748B2 (en) 2005-04-27 2011-03-08 Caterpillar Inc Lubrication system for a hydraulic or pneumatic tool
US8689940B2 (en) 2010-08-19 2014-04-08 Caterpillar Inc. Lubrication system for a breaking tool
US9010493B2 (en) 2012-03-13 2015-04-21 Caterpillar Inc. Lubrication arrangement
US9217341B2 (en) 2013-08-15 2015-12-22 Caterpillar Inc. Lubrication system for tool
CN109707315A (zh) * 2019-03-12 2019-05-03 张成功 一种钻井增速动力夯机用的轴承
CN109707315B (zh) * 2019-03-12 2024-04-16 东营华来智能科技有限公司 一种钻井增速动力夯机用的轴承
CN118339361A (zh) * 2021-12-03 2024-07-12 沙特阿拉伯石油公司 具有可溶解滚珠轴承的井下致动系统和方法

Also Published As

Publication number Publication date
DE4037261A1 (de) 1992-05-27
DE4037261C2 (enrdf_load_stackoverflow) 1993-04-22

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