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DE60024129T2 - Downhole tool - Google Patents

Downhole tool download PDF

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Publication number
DE60024129T2
DE60024129T2DE60024129TDE60024129TDE60024129T2DE 60024129 T2DE60024129 T2DE 60024129T2DE 60024129 TDE60024129 TDE 60024129TDE 60024129 TDE60024129 TDE 60024129TDE 60024129 T2DE60024129 T22DE
Authority
DE
Germany
Prior art keywords
contraption
wheels
rollers
transition
borehole
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
DE60024129T
Other languages
English (en)
Other versions
DE60024129D1 (de
Inventor
Robert Neil Balmedie HALL
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.)
Wireline Engineering Ltd
Original assignee
Wireline Engineering Ltd
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
Priority to GBGB9928488.7ApriorityCriticalpatent / GB9928488D0 / en
Priority to GB9928488priority
Priority to GB0012134priority
Priority to GB0012134Aprioritypatent / GB0012134D0 / en
Priority to GB0021328Aprioritypatent / GB0021328D0 / en
Priority to GB0021328priority
Priority to PCT / GB2000 / 004622 priority patent / WO2001040615A1 / en
Application filed by Wireline Engineering LtdfiledCriticalWireline Engineering Ltd
Application granted granted Critical
Publication of DE60024129D1publicationCriticalpatent / DE60024129D1 / de
Publication of DE60024129T2publicationCriticalpatent / DE60024129T2 / de
Anticipated expirationlegal-statusCritical
Expired - Lifetimelegal-statusCriticalCurrent

Left

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  • 210000001015AbdomenAnatomy0.000description10
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  • 238000005553drillingMethods0.000description3
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Classifications

    • E — FIXED CONSTRUCTIONS
    • E21-EARTH DRILLING; MINING
    • E21B-EARTH DRILLING, e.g. DEEP 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; Centralizing devices, e.g. stabilizers
    • E21B17 / 1057 — Centralizing devices with rollers or with a relatively rotating sleeve
    • E — FIXED CONSTRUCTIONS
    • E21-EARTH DRILLING; MINING
    • E21B-EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
    • E21B23 / 001 — Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole
    • E — FIXED CONSTRUCTIONS
    • E21-EARTH DRILLING; MINING
    • E21B-EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
    • E21B23 / 14 — Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for displacing a cable or cable-operated tool, e.g. for logging or perforating operations in deviated wells
    • E — FIXED CONSTRUCTIONS
    • E21-EARTH DRILLING; MINING
    • E21B-EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B-EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47 / 00 — Survey of boreholes or wells
    • E21B47 / 02 — Determining slope or direction
    • E21B47 / 024 — Determining slope or direction of devices in the borehole

Description

  • This invention relates to downhole equipment and, more particularly, to one adapted for use in wire rope or gauge wire applications.
  • In conventional wire rope and measuring wire operations, a work string with various tools on a wire or cable spooled from a surface drum is lowered into the casing, tubing, or other pipe in a wellbore. Wire rope and gauge wire operations can be performed during commissioning, servicing and maintenance, installation and extraction of underground equipment, intervention, and well logging for many reasons. Most strands of wire rope tools include one or more devices, e.g. B. collect data relating to the characteristics of the fluids retrieved, etc., such as temperature, salinity, etc. from the borehole or perform other functions. In addition to suspending the string of tools, the wire or cable can also serve as a conduit for the power that the tools require to perform their functions in the wellbore and can return signal cables for conveying data collected by the downhole sensors embrace the surface.
  • Wire rope strands work satisfactorily in vertical and near vertical bores, but problems arise when they are used in deflection bores because if the bore deflects beyond 55 °, the suspended cord of tools no longer penetrates satisfactorily under gravity, as the frictional forces which hold him back, exceed the driving force of gravity. In addition, the string tends to catch on the tubular connections or other upsets on the inner wall of the casing.
  • to Daniel and Jordan describe a system of rollers to reduce the frictional forces between the drill string and the inner wall of the casing that aligns tools such as well casing perforating guns.
  • In accordance with the present invention an underground apparatus as set forth in claim 1 is provided. Preferred features of the device are set out in the appended claims.
  • The apparatus may include an underground junction for inclusion in a string or tool. The means for aligning the device or transition may be an eccentric means such as an eccentric weight or an eccentric shape with respect to the transition or a portion thereof. Typical eccentric alignment means may be ballast means, such as a weight eccentrically positioned in the transition, to encourage the transition to take on one or more orientations rather than others. Typically, the preferred orientations are those in which the conveyances are in contact with the interior surface of the wellbore. In other embodiments of the invention, however, the means for aligning the transition may be an external shape of the transition or a portion thereof, e.g. B. an egg or an oval shape showing the orientation of the transition on a wider section of the transition than on a narrower section, e.g. B. at the tips of the oval favored. In this embodiment, the conveyance means can be in communication with the wider portion of the transition so that it is brought into contact with the wellbore surface when the transition aligns on the wider portion thereof.
  • Preferably the wheels or rollers are provided in pairs in a side-by-side arrangement and multiple pairs of wheels or rollers are provided on the apparatus or tool. The wheels or rollers are typically provided on the lower surface of the transition; H. on the lower surface when it has been aligned by the ballast.
  • The device can be divided into a tool or a tool string, but can be included in other strings in order to reduce the frictional resistance to the movement of the tool string in the bore.
  • Optionally, a motor can be provided in a separate module in the transition body. The motor can be operated by a battery which is also contained in a separate module in the transition.
  • The junction, tool, or string in which it is included may comprise a vibrator or oscillator, which may typically be in the form of an eccentric rotor which can be rotated by the motor. The motor can drive either or both of the vibrator wheels or rollers and need not drive both, even if both are provided in a particular embodiment. The vibrator typically induces vibrations in the tool body at a desired frequency which can optionally be varied, e.g. By adjusting the mass or position of weights on the rotor or its RPM or by some other means of vibration.
  • The junction, tool or string in which it is included may have a sensor coupled to a switch for controlling the motor and / or the vibrator. The sensors can be designed to perceive one or more characteristics of the tool or its surroundings. A preferred characteristic that the sensor can detect is the location of the transition or tool. In a preferred embodiment, for example, the sensor detects the vertical position of the transition or the tool and sends the motor and / or the rotor a signal that they are functioning if the transition or tool body deflects by more than a fixed amount above the vertical. This automatically turns on the motor to drive the wheels and / or vibrator when the transition or tool encounters a deflection bore, which tends to delay progress of the transition or tool in the wellbore. A typical deflection that can be chosen to activate the sensor is approximately 50 ° to 75 °. So if the junction or tool enters an area of ​​the borehole that is deflected by about 70 °, the detectors will detect the deflection of the location, and if the junction or tool enters the deflection bore, the motor will drive the wheels or vibrator to reduce the friction of the transition or tool against the inner surface of the wellbore and to circumvent or reduce the possibility of retention of the transition or tool on the inner surface of the wellbore.
  • The wheels or rollers are preferably in side-by-side relationship and are arranged to contact the inner surface of the wellbore at or very close to the perimeter of the transition or tool. For example, in preferred embodiments the wheels do not protrude significantly beyond the outer periphery of the body of the transition or tool so that they substantially coincide with the outer periphery of the cylindrical body. Typically, they extend through cuts in the side walls of the body and follow the shape of the outer diameter of the body and / or the inner surface of the borehole. The side walls of the cylindrical body are typically formed with slots etc. from which the wheels or other rollers protrude very slightly so that they engage the inner surface of the borehole. In preferred embodiments, the slots coincide very closely with the protruding portions of the wheels or rollers to avoid flat areas where the transition or tool can rest on the inner surface of the borehole without he / she touching the inner surface of the borehole with the wheels or Rolls touched. The wellbore engaging surfaces of the wheels are typically shaped to correspond to the inner surface of the pipe through which the transition will be passed.
  • In a preferred embodiment of the invention, the wheels are large in diameter and are arranged to extend through the body of the transition on opposite sides so that each wheel extends through opposite sides of the body and contacts opposite sides of the wellbore. Larger wheels can be more wear-resistant than the borehole and can also reduce coefficients of friction. Typically, the large wheels are positioned side by side in pairs, each pair having the same axis through the transition.
  • In the above embodiments, each wheel may be positioned on a central axis to extend through the opposite sides of the transition so that one large diameter wheel or a side-by-side pair of wheels may suffice. In some other preferred embodiments of the invention in which the wheels extend through opposite sides of the transition, smaller wheels are used, with each wheel extending through only a single side to contact the wellbore surface at only one point, and typically are wheels mounted on opposite sides on different axles and optionally at the same axle position along the transition, so that the axle center piece can be provided for a power or data cable.
  • Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
  • and b are a side or sectional view through a first embodiment of an apparatus;
  • Figure 3 is a side view of a schematic arrangement of a second device;
  • Figure 3 is an end view of another embodiment within a tube;
  • Figure 3 is a top plan view of the embodiment of Figure 1;
  • and are sectional views of the embodiment of FIG.
  • Figures b, c, d and e are sectional and side views, respectively, through a fourth embodiment;
  • and b show a sectional and side view of a fifth embodiment; and
  • and b are further views of the fifth embodiment.
  • Referring now to the drawings, a downhole transition comprises a body having mating connections at each end to be secured into a string of wire rope tools for well intervention or MWD, etc. The connections can be conventional socket and pin connections or others as required. An articulated joint and / or swivel head is provided at one or both ends to facilitate advancing the transition around corners and for alignment in a pipe.
  • The body is composed of an outer housing with multiple compartments to each contain a battery, a motor, a vibrator and a sensor. The housing may typically be formed from steel and may include a belly portion formed from lead or a denser material than the steel housing which eccentrically weights the body. This causes the transition to be weighed down asymmetrically, so that the belly section naturally takes the lowest position in a deflection bore under the force of gravity.
  • Instead of being formed from different materials to produce the asymmetrically weighted housing, the transition can simply be arranged in such a way that it has the heavier components such as the motor, the battery, etc. reinforced on the belly side in order to reduce the weight concentrated on this side and therefore induces the asymmetrical weighting without the need for a housing made of several pieces.
  • Transitions on the top and / or bottom of the transition include turrets that allow the transition to rotate axially relative to the remainder of the drill string.
  • The belly of the transition has two pairs of rollers at each end, each mounted on axles which run through the body of the transition. The rollers are contained in the body of the transition and protrude through slots in the belly portion of the housing so that they engage the inner surface of the casing, etc.The rollers can be shaped so that their end profile fits as closely as possible with the circular cross-sectional profile of the housing, and the rollers are positioned very close to the circumference of the body at the center line of the belly section, so that when the transition from the belly section is aligned the rollers are brought into engagement with the inner surface of the casing, etc. and the contact between the rollers and the casing is automatically maintained by the asymmetrically weighted housing of the belly section.
  • The roles are typically carried on role transitions that form part of the body.
  • Since the rollers are always brought into contact with the interior surface of the well casing in diversion bores, the transition will of course be along the lower surface of the diversion bore on the rollers. This minimizes the resistance to advancement of the junction through the casing. Since the rollers protrude very little through the slots in the housing which extends flush against the sides of the protruding portions of the wheels, there are no flat areas of the transition of the outer housing on which to rest on the inner surface of the well casing, with the exception of the area between the pairs of roles.
  • Since the asymmetrically weighted belly portion of the transition always aligns the transition so that the rollers engage the inner surface of the well casing, this mitigates the possibility that the rollers will fail to engage the inner surface of the well casing, e.g. B. in that the transition rests on a flat area out of contact with the rollers.
  • In heavily deviated wells (i.e., over 65 ° to 70 °), an optional tilt sensor activates the optional electric motor to operate one or both of the rollers and an optional vibrator connected in the drill string. The electric motor can optionally be battery-operated by the on-board battery or can be operated by an electric line in combination with the wire rope or lowered along it from the surface. A hydraulic motor can replace the electric motor and can be supplied with fluid from a hydraulic line from the surface.
  • The vibrator includes an eccentric rotor which is rotated by the motor at a number of different frequencies specified by an operator either from the surface or by setting the required vibration frequency at the transition before it is started from the surface can. The vibration of the junction helps overcome frictional resistance to movement through the casing and can free the junction or string it is tied to from becoming caught by upsets or casing, etc. on the inner surface of the well casing.
  • The motor can alternatively or additionally drive the rollers directly in a forward or reverse direction. For this purpose, a transmission (not shown) of conventional design is typically provided. With the wheels or rollers, the junction can penetrate into boreholes that are deflected by up to approximately 75-80 °. By additionally providing a motor and / or vibrator, the transition can penetrate into boreholes that are deflected by up to approximately 87 °.
  • shows a modified embodiment in which the motor is provided in a separate connection transition.
  • and show an end and side view, respectively, of a further transition which has no additional ballast but is oval shaped (see end view of FIG. 10) so that the transition has a belly section and an opposing back section which are located on a wider radius of the transition, and having opposite side portions with a narrower radius. The wheels are arranged in two sets of side-by-side pairs, each pair being mounted on a common axle and optionally sealed by a wiper seal, the axle extending between the side sections and being secured by a pin so that the tips of the wheels extend to and through the open spots in the back and stomach sections or c. Extending the wheels through the walls of the transition creates two landing zones on the perimeter of the transition where it is balanced and stable. The wheels protrude very slightly through the open spots and are profiled to follow the shape of the internal wall of the borehole W as described above.
  • When the transition is in the borehole W, the oval shape tends to unbalance the transition when it rests on its side portions because these have a narrower radius and therefore a narrower surface area in contact with the borehole W than that Have back section and stomach section. Should the transition rest on one of the side sections, therefore, it tends to overturn the balance on the tips of the wheels which extend through the stomach and back sections or c. In this configuration, the tips of the wheels contact the interior portion of the borehole W, and the transition maintains its equilibrium in this orientation so that the wheels can drive the transition, or merely rotate, to reduce the friction delaying the passage of the transition through the borehole. to reduce.
  • It should be noted that the transition need not be oval and with other shapes that are more balanced in one orientation than another, e.g. Regular shapes having protrusions on the sides or elsewhere to create areas of low surface area for contacting the borehole, good results have been achieved.
  • Typically, the wheels or rollers are associated with the portion of the transition which contacts the borehole in the balanced orientation and which typically has a larger surface area or a number of projections (such as wheels) spaced apart and between which the transition is easier can keep his balance.
  • It should also be noted that the junction need not be operated at all and that the provision of one or more unintelligent, easy-to-unbalance and non-powered junctions in a drill string can facilitate the passage of the string through less distracted bores.
  • Figure 3 shows a fourth embodiment of a transition with a substantially rounded body through which 8 wheels or rollers extend. The rollers - are arranged on a single axis and extend through a sidewall on a flattened area on the top or bottom of the transition to contact the borehole in only one position. Each roller (e.g.) has a pair of wheels and is typically (but not necessarily) placed above or below another roller (e.g.) so that groups of 2 rollers in 4 positions A / B / C / D are provided along the axis of the transition. Axially adjacent rollers are offset by 90 ° with respect to one another, so that the wheels at A and C are aligned one after the other and each extend through the upper and lower surfaces of the transition and the wheels at B and D are aligned one after the other similarly, but by 90 ° to those at A and C are arranged to extend through the side surfaces of the transition.
  • The provision of smaller wheels that only extend through one face of the transition allows axial passage through the center of the transition for a power or data cable.
  • The offset wheels increase the likelihood that some of the wheels will engage the wellbore and make it less of a concern that an alignment means must be present in this embodiment of the invention. Therefore, embodiments like this here can have rounded transition bodies so that they can better fit into smaller bore tubes.
  • However, alignment means, for example in the form of eccentric weights or shapes in or on the transition body, can optionally be provided with this embodiment.
  • Turret heads can be provided to allow the transition to rotate on its axis relative to the remainder of the strand S and the inner body of the turret, and the turret heads can optionally have a hollow bore to allow passage of the cable. Optionally, bearings, seals and lubrication channels etc. can be provided. A counter-rotating tube connects to the inner body of the rotating head to remain static while the transition body pivots around it to prevent the cable from twisting.
  • Figures 9 and 9 show another embodiment of a transition having an eccentrically shaped body with 4 rollers - each mounted on a separate axle - and each having 2 wheels extending through the flattened areas of the top and bottom walls of the transition. Rollers and are mounted in a pair, respectively, on the top and bottom of the transition, as are rollers and, but the latter are axially spaced from the rollers and along the transition body. This arrangement enables the passage of a counter-rotating tube or device body and a cable for data and / or power, as described for the embodiment of FIG. The transition optionally also has rotating heads, seals and bearings, as described in the embodiment of FIG.
  • In common with some of the other described embodiments, the wheels on the rollers are shaped to closely follow the contour of the outer surface of the transition body and the inner surface of the borehole, thereby assisting in aligning the transition with the wheels at the top or bottom of the transition . This also makes the transition more stable while resting on the wheels and is unlikely to tip over, causing the wheels to loosen their engagement with the inside surface of the riser and increasing frictional resistance to forward movement.
  • The axial passage can accommodate any type of elongated element, such as power or data cables or coiled tubing, or simply control wires for tools further down the string.
  • Modifications and improvements can be included without departing from the scope of the invention. For example, the vibrator or oscillator is typically a motor that rotates eccentric weights. The eccentric weight can be adjusted to account for the different total drill string weights either using a different mass of eccentric weight or adjusting its position. The motor can be operated electrically or hydraulically. The vibrator or oscillator may alternatively be a hammer-like device providing shock-type oscillation and similarly be electrically or hydraulically operated. The oscillations applied to the tool can thus be axial, transverse or radial and can be adjusted to be at a desired frequency and / or amplitude, which can optionally be changed during operation of the transition or the tool. This creates static friction to reduce dynamic friction and induces descending motion of the transition in the borehole.

Claims (29)

  1. A downhole device (14) for being received in a downhole string and movement in a borehole, the device (14) comprising alignment means (12, 14,) for aligning the device (14) in a borehole and one or more wheels or rollers arranged on the device (14) () for engaging the inner surface of the borehole, characterizedthat the device (14) comprises at least one rotary head device (14), wherein the rotary head device (), the alignment means (,,) and the wheels or rollers () are provided on the same roller transition () and the alignment means (,,) are provided on at least one is rotatably secured to the wheels or the rollers (14) to bring the at least one wheel or the at least one roller (14) into contact with the inner surface of the borehole.
  2. Apparatus (10) according to claim 1, wherein the alignment means includes an eccentric weight (10).
  3. Apparatus (10) according to claim 1 or claim 2, wherein the alignment means includes an eccentric shape of a portion (12, 14) of the apparatus.
  4. Apparatus (10) according to any one of the preceding claims, wherein the alignment means includes ballast means (14) which is positioned eccentrically in the apparatus (14) so ​​that the apparatus (14) is favored to adopt an alignment in which the ballast means to a radially lower one Section of the device comes to rest.
  5. Apparatus (10) according to any one of the preceding claims, wherein the alignment means includes a portion of the apparatus (14) which has a variable radius which favors alignment of the apparatus (14) on a portion of the apparatus (14) having a relatively larger radius.
  6. Apparatus (10) according to claim 5, wherein the wheels or rollers (14) are connected to the portion of the apparatus (10) which has a relatively larger radius (14, 21) so that they are brought into contact with the borehole surface when the Aligns device () on section (,).
  7. Apparatus (10) according to any preceding claim, wherein the wheels or rollers (14) are provided on opposite sides of the apparatus (14).
  8. Apparatus (10) according to any one of the preceding claims, wherein the wheels or rollers (12) are laterally spaced apart in one or more pairs in a side-by-side arrangement.
  9. Apparatus (10) according to any preceding claim, wherein the wheels or rollers (14) are provided on the lower surface of the apparatus (14).
  10. Device (10) according to one of the preceding claims, wherein the wheels or rollers (14) are arranged so that they contact the inner surface of the borehole substantially on the outer circumference of the device (14).
  11. Apparatus (10) according to any one of the preceding claims, wherein the apparatus (10) is formed with openings or slots from which the wheels or rollers (14) protrude to engage the interior surface of the wellbore.
  12. Apparatus (10) according to claim 12, wherein the protruding portions of the wheels or rollers (10) are shaped to rest on the outer surface of the apparatus (10) adjacent the openings or slots or the inner surface of the borehole through which the apparatus passes () will move, fit.
  13. Apparatus (10) according to any one of the preceding claims, wherein the wheels or rollers (14) are adapted to extend through the body (14) on opposite sides of the apparatus (10).
  14. Apparatus (10) according to any one of the preceding claims, wherein the wheels or rollers (14) comprise wheels positioned side by side in pairs, each pair being on the same axis through the apparatus (14).
  15. Apparatus (10) according to any one of the preceding claims, wherein at least some of the wheels or rollers (14) are axially, circumferentially or laterally offset with respect to one another.
  16. Apparatus (10) according to any preceding claim including a vibrator or oscillator (10).
  17. Apparatus (10) according to claim 16, wherein the vibrator or oscillator (10) includes an eccentric rotor.
  18. Apparatus (10) according to any preceding claim including a motor (10) for driving one or more of the wheels or rollers (10), the vibrator and the oscillator (10).
  19. Apparatus (10) according to any one of claims 16-18, wherein the frequency of the vibrations induced by the vibrator or oscillator (10) can be varied.
  20. Apparatus (10) according to any preceding claim, comprising a sensor (10) coupled to a switch for controlling movement of the apparatus (10) in the borehole.
  21. Device (10) according to claim 20, wherein the sensor (10) is designed to sense the position of the device (10).
  22. Device () according to claim 20 or 21, wherein the sensor (10) detects the vertical position of the device () and sends a signal to the switch which controls the wheels or rollers (), causing the wheels or rollers ( ) initiate movement of the device (14) when the device (14) deflects more than a fixed amount from the vertical.
  23. Apparatus (10) according to claim 22, wherein the wheels or rollers (14) are caused to initiate movement of the apparatus (10) when the deflection of the apparatus (10) from vertical is in the range of 50 ° to 70 °.
  24. Device (10) according to one of the preceding claims, which has a supply source.
  25. Device (10) according to one of the preceding claims, which comprises a hinge device.
  26. Device (10) according to one of the preceding claims, which has an axial passage for power cables, data cables, control wires, winding tubes or other elongated parts (10).
  27. Apparatus as claimed in any preceding claim, wherein the or each wheel or roller that has been brought into contact with the inner surface of the wellbore is maintained in a vertical orientation by the alignment means.
  28. An underground tool incorporating an apparatus (10) according to any preceding claim.
  29. An underground string including an apparatus (10) according to any one of claims 1 to 27.
DE60024129T1999-12-032000-12-04Bore hole tool Expired - LifetimeDE60024129T2 (de)

Priority Applications (7)

Application NumberPriority DateFiling dateTitle
GBGB9928488.7AGB9928488D0 (en) 1999-12-031999-12-03Downhole tool
GB99284881999-12-03
GB00121342000-05-20
GB0012134AGB0012134D0 (en) 2000-05-202000-05-20Apparatus
GB00213282000-08-31
GB0021328AGB0021328D0 (en) 2000-08-312000-08-31Apparatus
PCT / GB2000 / 004622WO2001040615A1 (en) 1999-12-032000-12-04Downhole device

Publications (2)

ID = 27255729

Family Applications (1)

Application NumberTitlePriority DateFiling date
DE60024129TExpired - LifetimeDE60024129T2 (de) 1999-12-032000-12-04Downhole tool

Country Status (10)

Families Citing this family (28)

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