CA2340995C - An apparatus for connecting tubulars using a top drive - Google Patents
An apparatus for connecting tubulars using a top drive Download PDFInfo
- Publication number
- CA2340995C CA2340995C CA002340995A CA2340995A CA2340995C CA 2340995 C CA2340995 C CA 2340995C CA 002340995 A CA002340995 A CA 002340995A CA 2340995 A CA2340995 A CA 2340995A CA 2340995 C CA2340995 C CA 2340995C
- Authority
- CA
- Canada
- Prior art keywords
- tubular
- motor
- suspension unit
- tubulars
- top drive
- 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
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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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
Abstract
An apparatus for facilitating the connection of tubulars using a top drive, said apparatus comprising a motor (4, 4') for rotating a tool (30) for drivingly engaging a tubular, and means (3) for connecting said motor (4, 4') to said top drive, the apparatus being such that, in use, said motor (4, 4') can rotate one tubular with respect to another to connect said tubular.
Description
AN APPARATUS FOR CONNECTING TUBULARS USING A TOP DRIVE
This invention relates to an apparatus for facilitating the connection of tubulars using a top drive and is more particularly, but not exclusively, intended for facilitating the connection of a section or stand, of casing to a string of casing.
In the construction of oiil or gas wells it is usually necessary to line the borehole with a string of tubulars known as a casing. Because of the length of the casing required, sections or stands of say two sections of casing are progressively added to the string as it is lowered into the well from a drilling platform. In particular, when it is desired to add a section or star-d of casing the string is usually restrained from falling into the well by applying the slips of a spider located in the floor of the drilling platform. The new section or stand of casing is then moved from a rack to the well centre above the spider. The threaded pin of the section or stand of casing to be connected is then located over the threaded box of the casing in the well and the connection is made up by rotatiion there between. An elevator is then connected to the top of the new section or stand and the whole casing string lifted slightly to enable the slips of the spider to be released. The whole casing string is then lowered until the top of the section is adjacent the spiider whereupon the slips of the spider are re-applied, the elevator disconnected and the process repeated.
It is common practice ito use a power tong to torque the connection up to a predetermined torque in order to make the copnection. The power tong is located on a platform, either on rails, or hurig from a derrick on a chain. However, it has recently been proposed to use a top drive for making such connection. The normal use of such a top drive may be the driving of a drill string.
This invention relates to an apparatus for facilitating the connection of tubulars using a top drive and is more particularly, but not exclusively, intended for facilitating the connection of a section or stand, of casing to a string of casing.
In the construction of oiil or gas wells it is usually necessary to line the borehole with a string of tubulars known as a casing. Because of the length of the casing required, sections or stands of say two sections of casing are progressively added to the string as it is lowered into the well from a drilling platform. In particular, when it is desired to add a section or star-d of casing the string is usually restrained from falling into the well by applying the slips of a spider located in the floor of the drilling platform. The new section or stand of casing is then moved from a rack to the well centre above the spider. The threaded pin of the section or stand of casing to be connected is then located over the threaded box of the casing in the well and the connection is made up by rotatiion there between. An elevator is then connected to the top of the new section or stand and the whole casing string lifted slightly to enable the slips of the spider to be released. The whole casing string is then lowered until the top of the section is adjacent the spiider whereupon the slips of the spider are re-applied, the elevator disconnected and the process repeated.
It is common practice ito use a power tong to torque the connection up to a predetermined torque in order to make the copnection. The power tong is located on a platform, either on rails, or hurig from a derrick on a chain. However, it has recently been proposed to use a top drive for making such connection. The normal use of such a top drive may be the driving of a drill string.
2 A problem associated with using a top drive for rotating tubulars in order to obtain a connection between tubulars is that some top drives are not specifically designed for rotating tubulars are not able to rotate at the correct speed or have non standard rotors.
According to the present invention there is provided an apparatus for facilitating the connection of tubulars using a top drive, said apparatus comprising a motor for rotating a tool for drivingly engaging a tubular, and means for connecting said motor to said top drive, the apparatus being such that, in use, said motor can rotate one tubular with respect to another to connect said tubulars.
The motor can be hydraulically operable, and the suspension unit can, in use, move the motor relative to the axis of the top drive to facilitate aligning the tubulars. In one embodiment, the suspension unit is provided with at least one piston and cylinder in order to raise and lower the motor. The at least one piston and cylinder can be pneumatically actuated to compensate for the weight of the tubular.
Furthermore, suspension unit can comprise spherical bearings to allow movement of the motor in two planes, and the suspension unit can comprise adjustable pistons and cylinders to position the motor.
In one embodiment, the apparatus can further comprise a mud pipe for delivering mud to said tubular. The mud pipe can be provided with a ball joint at both ends thereof.
In one embodiment, the apparatus can be supported by a top drive.
The present invention also provides a method of connecting first and second tubulars for use in lining a borehole, the method comprising: coupling said first tubular to a top drive using a suspension unit, wherein the tubular engages the rotor of a motor supported by the suspension unit; engaging a lower end of said first tubular with an upper end of said second tubular; rotating said first tubular using the motor so as to screw the tubulars together; and tightening the connection between the tubulars by rotating the first tubular using the top drive.
In one embodiment, the method can comprise adjusting the suspension unit prior to tightening the connection using the top drive so as to bring the first tubular into alignment with the top drive.
For a better understanding of the present invention and in order to show how the same may be carried into effect reference will now be made, by way of example, to the accompanying drawings, in which:
2a Figure 1 is a front perspective view of an apparatus in accordance with the present invention; and Figure 2 is a rear perspective view of the apparatus of Figure 1 in use.
Referring to Figure 1 there is shown an apparatus which is generally identified by reference numeral 1.
The apparatus 1 comprises a connecting tubular 2, a suspension unit 3 and a hydraulic motor 4 and 4'. The hydraulic motor 4,4' has a stator 5 and a rotor 6 and is driven by a supply of pressurised hydraulic fluid (the fluid supply lines are not illustrated in the Figures). The suspension unit 3 suspends the hydraulic motor 4,4' from the connecting tubular 2.
The present invention also provides apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a first tubular to rotate the first tubular with respect to a second tubular to connect the tubulars, and a suspension unit for connecting the motor to the top drive, wherein the suspension unit allows the motor to move in at least two planes.
The present invention also provides a method of connecting first and second tubulars for use in lining a borehole, the method comprising coupling the first tubular to a top drive using a suspension unit, wherein the tubular engages a rotor of a motor supported by the suspension unit, whereby the suspension unit allows the motor to move in at least two planes, engaging a lower end of the first tubular with an upper end of the second tubular, rotating the first tubular using the motor so as to screw the tubulars together, and tightening the connection between the tubulars by rotating the first tubular using the top drive.
The present invention also provides apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a first tubular to rotate the first tubular with respect to a second tubular to connect the tubulars, and a suspension unit for connecting the motor to the top drive, wherein the suspension unit can, in use, move the motor relative to the axis of the tope drive to facilitate aligning the tubulars and includes at least one piston and cylinder in order to raise and lower the motor, wherein the at least one piston and cylinder can be pneumatically actuated to compensate for the weight of the first tubular.
2b The present invention also provides apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a first tubular to rotate the first tubular with respect to a second tubular to connect the tubulars, a suspension unit for connecting the motor to the top drive, and a mud pipe for delivering mud to the first tubular, wherein the mud pipe includes a ball joint at both ends thereof.
The present invention also provides an apparatus for facilitating making of a connection between an upper tubular and a lower tubular, comprising a top drive having a tubular engagement tool capable of torsionally gripping the upper tubular, and a suspension unit operatively connected to the top drive, the suspension unit configured for compensating the tubular engagement tool in order to compensate for movement of the upper tubular.
The present invention also provides a method of facilitating making of a connection between an upper tubular and a lower tubular, comprising engaging the upper tubular with a tubular engagement tool of a top drive having a suspension unit, engaging a lower end of the upper tubular with an upper end of the lower tubular, rotating the upper tubular via the tubular engagement tool, thereby threading the tubulars to form the connection, torquing the connection via the tubular engagement tool, and compensating for movement of the upper tubular with the suspension unit during the threading.
The present invention also provides a method of facilitating making of a connection between an upper tubular and a lower tubular, comprising engaging the upper tubular with a tubular engagement tool of a top drive having a suspension unit, compensating for weight of the upper tubular to accommodate movement of the upper tubular while engaged by the tubular engagement tool, engaging a lower end of the upper tubular with an upper end of the lower tubular to form the connection therebetween, and delivering torque to the upper tubular via the tubular engagement tool.
According to the present invention there is provided an apparatus for facilitating the connection of tubulars using a top drive, said apparatus comprising a motor for rotating a tool for drivingly engaging a tubular, and means for connecting said motor to said top drive, the apparatus being such that, in use, said motor can rotate one tubular with respect to another to connect said tubulars.
The motor can be hydraulically operable, and the suspension unit can, in use, move the motor relative to the axis of the top drive to facilitate aligning the tubulars. In one embodiment, the suspension unit is provided with at least one piston and cylinder in order to raise and lower the motor. The at least one piston and cylinder can be pneumatically actuated to compensate for the weight of the tubular.
Furthermore, suspension unit can comprise spherical bearings to allow movement of the motor in two planes, and the suspension unit can comprise adjustable pistons and cylinders to position the motor.
In one embodiment, the apparatus can further comprise a mud pipe for delivering mud to said tubular. The mud pipe can be provided with a ball joint at both ends thereof.
In one embodiment, the apparatus can be supported by a top drive.
The present invention also provides a method of connecting first and second tubulars for use in lining a borehole, the method comprising: coupling said first tubular to a top drive using a suspension unit, wherein the tubular engages the rotor of a motor supported by the suspension unit; engaging a lower end of said first tubular with an upper end of said second tubular; rotating said first tubular using the motor so as to screw the tubulars together; and tightening the connection between the tubulars by rotating the first tubular using the top drive.
In one embodiment, the method can comprise adjusting the suspension unit prior to tightening the connection using the top drive so as to bring the first tubular into alignment with the top drive.
For a better understanding of the present invention and in order to show how the same may be carried into effect reference will now be made, by way of example, to the accompanying drawings, in which:
2a Figure 1 is a front perspective view of an apparatus in accordance with the present invention; and Figure 2 is a rear perspective view of the apparatus of Figure 1 in use.
Referring to Figure 1 there is shown an apparatus which is generally identified by reference numeral 1.
The apparatus 1 comprises a connecting tubular 2, a suspension unit 3 and a hydraulic motor 4 and 4'. The hydraulic motor 4,4' has a stator 5 and a rotor 6 and is driven by a supply of pressurised hydraulic fluid (the fluid supply lines are not illustrated in the Figures). The suspension unit 3 suspends the hydraulic motor 4,4' from the connecting tubular 2.
The present invention also provides apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a first tubular to rotate the first tubular with respect to a second tubular to connect the tubulars, and a suspension unit for connecting the motor to the top drive, wherein the suspension unit allows the motor to move in at least two planes.
The present invention also provides a method of connecting first and second tubulars for use in lining a borehole, the method comprising coupling the first tubular to a top drive using a suspension unit, wherein the tubular engages a rotor of a motor supported by the suspension unit, whereby the suspension unit allows the motor to move in at least two planes, engaging a lower end of the first tubular with an upper end of the second tubular, rotating the first tubular using the motor so as to screw the tubulars together, and tightening the connection between the tubulars by rotating the first tubular using the top drive.
The present invention also provides apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a first tubular to rotate the first tubular with respect to a second tubular to connect the tubulars, and a suspension unit for connecting the motor to the top drive, wherein the suspension unit can, in use, move the motor relative to the axis of the tope drive to facilitate aligning the tubulars and includes at least one piston and cylinder in order to raise and lower the motor, wherein the at least one piston and cylinder can be pneumatically actuated to compensate for the weight of the first tubular.
2b The present invention also provides apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a first tubular to rotate the first tubular with respect to a second tubular to connect the tubulars, a suspension unit for connecting the motor to the top drive, and a mud pipe for delivering mud to the first tubular, wherein the mud pipe includes a ball joint at both ends thereof.
The present invention also provides an apparatus for facilitating making of a connection between an upper tubular and a lower tubular, comprising a top drive having a tubular engagement tool capable of torsionally gripping the upper tubular, and a suspension unit operatively connected to the top drive, the suspension unit configured for compensating the tubular engagement tool in order to compensate for movement of the upper tubular.
The present invention also provides a method of facilitating making of a connection between an upper tubular and a lower tubular, comprising engaging the upper tubular with a tubular engagement tool of a top drive having a suspension unit, engaging a lower end of the upper tubular with an upper end of the lower tubular, rotating the upper tubular via the tubular engagement tool, thereby threading the tubulars to form the connection, torquing the connection via the tubular engagement tool, and compensating for movement of the upper tubular with the suspension unit during the threading.
The present invention also provides a method of facilitating making of a connection between an upper tubular and a lower tubular, comprising engaging the upper tubular with a tubular engagement tool of a top drive having a suspension unit, compensating for weight of the upper tubular to accommodate movement of the upper tubular while engaged by the tubular engagement tool, engaging a lower end of the upper tubular with an upper end of the lower tubular to form the connection therebetween, and delivering torque to the upper tubular via the tubular engagement tool.
3 The suspension unit 3 comprises a plate 7 which is fixed to the connecting tubular 2 by a collar 8. The plate 7 has two projections 9 and 10 which have holes 11 and 12 for accommodating axles 13 and 14, which are rotationally disposed therein.
The axles 13 and 14 are integral with a rigid body 15. A slider 16 is arranged on runners 17 and (not shown) on the rigid body 15. Arms 18 and 19 are connected at one end to the slider 16 via spherical bearings 20 and at the other end to each side of the stator 5 via spherical bearings 21 and 21'. The arms 18 and 19 are provided with lugs 22 and 22' to which one end of' a piston and cylinder 23, 24 is attached and are movable thereabout. The other end of each piston and cylinder 23, 24 is attached to lugs 25, 26 respectively and is movable thereabout. A mud pipe 27 is provided between the plate 7 and the stator 5 for carrying mud to the inside of a tubular therebelow. The mud pipe 27 comprises curved outer surfaces at both ends (not shown) which are located in corresponding recesses in cylindrical sections 28, 29, thus allowing a ball and socket type movement between the plate 7 and the stator 5.
Referring to Figure 2, the apparatus 1 is suspended from a top drive (not shown) via connecting shaft 2. A tool :30 for engaging with a tubular is suspended from beneath the rotor 6 of the hydraulic mol:or 4. Such a tool may be arranged to be inserted into the upper end of the tubular, with gripping elements of the tool being radially displaceable for engagement with the inner wall of the tubular so as to secure the tubular to the tool.
In use, a tubular (not st-own) to be connected to a tubular string held in a spider (not shown) is located over the: tool 30. The tool 30 grips the tubular. The apparatus I
and the tubular are lowered by moving the top drive so that the tubular is in close proximity with the tubular stnng held in the spider. However, due to amongst other things manufacturing tolerances in the tubulars, the tubular often does not align
The axles 13 and 14 are integral with a rigid body 15. A slider 16 is arranged on runners 17 and (not shown) on the rigid body 15. Arms 18 and 19 are connected at one end to the slider 16 via spherical bearings 20 and at the other end to each side of the stator 5 via spherical bearings 21 and 21'. The arms 18 and 19 are provided with lugs 22 and 22' to which one end of' a piston and cylinder 23, 24 is attached and are movable thereabout. The other end of each piston and cylinder 23, 24 is attached to lugs 25, 26 respectively and is movable thereabout. A mud pipe 27 is provided between the plate 7 and the stator 5 for carrying mud to the inside of a tubular therebelow. The mud pipe 27 comprises curved outer surfaces at both ends (not shown) which are located in corresponding recesses in cylindrical sections 28, 29, thus allowing a ball and socket type movement between the plate 7 and the stator 5.
Referring to Figure 2, the apparatus 1 is suspended from a top drive (not shown) via connecting shaft 2. A tool :30 for engaging with a tubular is suspended from beneath the rotor 6 of the hydraulic mol:or 4. Such a tool may be arranged to be inserted into the upper end of the tubular, with gripping elements of the tool being radially displaceable for engagement with the inner wall of the tubular so as to secure the tubular to the tool.
In use, a tubular (not st-own) to be connected to a tubular string held in a spider (not shown) is located over the: tool 30. The tool 30 grips the tubular. The apparatus I
and the tubular are lowered by moving the top drive so that the tubular is in close proximity with the tubular stnng held in the spider. However, due to amongst other things manufacturing tolerances in the tubulars, the tubular often does not align
4 perfectly with the tubular held in the spider. The suspension unit 3 allows minor vertical and horizontal movements to be made by using alignment pistons 31 and 32 for horizontal movements, and piston and cylinders 23 and 24 for vertical movements. The alignment piston 31 acts between the rigid body 15 and the plate 7. The alignment piston 32 acts between the slider 16 and the arm 19. The alignment pistons 31 and 32 and pistons and cylinders 2:3, 25 are actuated by hydraulic or pneumatic means and controlled from a remote control device.
The piston and cylinders 23, 24 are hydraulically operable. It is envisaged however, that the piston and, cylinders 23, 24 may be of the pneumatic compensating type, i.e. their internal pressure may be adjusted to compensate for the weight of the tubular so that movement of the tubular may be conducted with minimal force.
This can conveniently be achieved by introducing pneumatic fluid into the piston and cylinder 23, 24 and adjusting the pressure therein.
Once the tubulars are aligned, the hydraulic motor 4 and 4' rotate the tubular via gearing in the stator 5 thereby making up the severed connection. During connection the compensating piston and cylinders 23, 24 expand to accommodate the movement of the upper tubular. The aligmment pistons 31 and 32 can then be used to move the top of the tubular into alignment with the top drive. If necessary, final torquing can be conducted by the top drive at this stage, via rotation of the pipe 27, and the main elevator can also be swung onto and connected to the tubular prior to releasing the slips in the spider and lowering the casing string. It will be appreciated that the suspension unit 3 effectively provides an adapter for connecting a top drive to the tubular engaging tool 30.
The piston and cylinders 23, 24 are hydraulically operable. It is envisaged however, that the piston and, cylinders 23, 24 may be of the pneumatic compensating type, i.e. their internal pressure may be adjusted to compensate for the weight of the tubular so that movement of the tubular may be conducted with minimal force.
This can conveniently be achieved by introducing pneumatic fluid into the piston and cylinder 23, 24 and adjusting the pressure therein.
Once the tubulars are aligned, the hydraulic motor 4 and 4' rotate the tubular via gearing in the stator 5 thereby making up the severed connection. During connection the compensating piston and cylinders 23, 24 expand to accommodate the movement of the upper tubular. The aligmment pistons 31 and 32 can then be used to move the top of the tubular into alignment with the top drive. If necessary, final torquing can be conducted by the top drive at this stage, via rotation of the pipe 27, and the main elevator can also be swung onto and connected to the tubular prior to releasing the slips in the spider and lowering the casing string. It will be appreciated that the suspension unit 3 effectively provides an adapter for connecting a top drive to the tubular engaging tool 30.
Claims (21)
1. Apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a motor for rotating a tool for drivingly engaging a first tubular to rotate the first tubular with respect to a second tubular to connect said tubulars, and a suspension unit for connecting the motor to the top drive, wherein the suspension unit allows the motor to move in at least two planes.
2. An apparatus as claimed in claim 1, wherein said motor is hydraulically operable.
3. An apparatus as claimed in claim 1 or 2, wherein the apparatus is supported by the top drive.
4. An apparatus as claimed in claim 1, 2 or 3, wherein said suspension unit can, in use, move said motor relative to the axis of said top drive to facilitate aligning said tubulars.
5. An apparatus as claimed in claim 4, wherein said suspension unit is provided with at least one piston and cylinder in order to raise and lower said motor.
6. An apparatus as claimed in claim 5, wherein said at least one piston and cylinder can be pneumatically actuated to compensate for the weight of said tubular.
7. An apparatus as claimed in any one of claims 1 to 6, wherein said suspension unit comprises spherical bearings planes.
8. An apparatus as claimed in any one of claims 1 to 6, wherein said suspension unit comprises adjustable pistons and cylinders to position said motor.
9. An apparatus as claimed in any one of claims 1 to 8, further comprising a mud pipe for delivering mud to said tubular.
10. An apparatus as claimed in claim 9, wherein said mud pipe is provided with a ball joint at both ends thereof.
11. A method of connecting first and second tubulars for use in lining a borehole, the method comprising:
coupling said first tubular to a top drive using a suspension unit, wherein the tubular engages a rotor of a motor supported by the suspension unit, whereby the suspension unit allows the motor to move in at least two planes;
engaging a lower end of said first tubular with an upper end of said second tubular;
rotating said first tubular using the motor so as to screw the tubulars together; and tightening the connection between the tubulars by rotating the first tubular using the top drive.
coupling said first tubular to a top drive using a suspension unit, wherein the tubular engages a rotor of a motor supported by the suspension unit, whereby the suspension unit allows the motor to move in at least two planes;
engaging a lower end of said first tubular with an upper end of said second tubular;
rotating said first tubular using the motor so as to screw the tubulars together; and tightening the connection between the tubulars by rotating the first tubular using the top drive.
12. A method according to claim 10, the method comprising adjusting the suspension unit prior to tightening the connection using the top drive so as to bring the first tubular into alignment with the top drive.
13. Apparatus for the connection of tubulars within a tubular string, the apparatus comprising:
a motor for detachably engaging an upper end of a first tubular to be connected to a second tubular at an upper end of the tubular string and for rotating the first tubular with respect to the second tubular to couple the tubulars together; and a suspension unit from which the motor is suspended for facilitating alignment of the first tubular with respect to the second tubular.
a motor for detachably engaging an upper end of a first tubular to be connected to a second tubular at an upper end of the tubular string and for rotating the first tubular with respect to the second tubular to couple the tubulars together; and a suspension unit from which the motor is suspended for facilitating alignment of the first tubular with respect to the second tubular.
14. Apparatus as claimed in claim 13, wherein the suspension unit incorporates alignment means for movement of the motor relative to the axis of the first tubular.
15. Apparatus as claimed in claim 13 or 14, wherein the suspension unit incorporates alignment means for movement of the motor in at least two planes
16. Apparatus as claimed in claim 13, 14 or 15, wherein said motor is hydraulically actuable.
17. Apparatus as claimed in any one of claims 13 to 16, wherein said suspension unit is provided with at least one piston and cylinder assembly to position the motor.
18. Apparatus as claimed in any one of claims 13 to 17, wherein said suspension unit incorporates at least one piston and cylinder assembly actuable to compensate for the weight of the first tubular.
19. Apparatus as claimed in any one of claims 13 to 17, wherein said suspension unit is configured for compensating the tubular engagement tool in order to compensate for movement of the first tubular relative to the second tubular during connection of the tubulars.
20. Apparatus for the connection of tubulars within a tubular string, the apparatus comprising:
a motor for detachably engaging an upper end of a first tubular to be connected to a second tubular at an upper end of the tubular string and for rotating the first tubular with respect to the second tubular to couple the tubulars together; and a suspension unit from which the motor is suspended for facilitating alignment of the first tubular with respect to the second tubular, the suspension unit incorporating at least one piston and cylinder assembly actuable to compensate for the weight of the first tubular.
a motor for detachably engaging an upper end of a first tubular to be connected to a second tubular at an upper end of the tubular string and for rotating the first tubular with respect to the second tubular to couple the tubulars together; and a suspension unit from which the motor is suspended for facilitating alignment of the first tubular with respect to the second tubular, the suspension unit incorporating at least one piston and cylinder assembly actuable to compensate for the weight of the first tubular.
21. Apparatus for facilitating making of a connection between an upper tubular and a lower tubular, comprising:
a motor having a tubular engagement tool capable of torsionally gripping the upper tubular for rotating the upper tubular with respect to the lower tubular to couple the tubulars together; and a suspension unit from which the motor is suspended, the suspension unit being configured for compensating the tubular engagement tool in order to compensate for movement of the upper tubular relative to the lower tubular during connection of the tubulars.
a motor having a tubular engagement tool capable of torsionally gripping the upper tubular for rotating the upper tubular with respect to the lower tubular to couple the tubulars together; and a suspension unit from which the motor is suspended, the suspension unit being configured for compensating the tubular engagement tool in order to compensate for movement of the upper tubular relative to the lower tubular during connection of the tubulars.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2590542A CA2590542C (en) | 1998-08-24 | 1999-08-16 | An apparatus for connecting tubulars using a top drive |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9818360.1 | 1998-08-24 | ||
GB9818360A GB2340857A (en) | 1998-08-24 | 1998-08-24 | An apparatus for facilitating the connection of tubulars and alignment with a top drive |
PCT/GB1999/002708 WO2000011310A1 (en) | 1998-08-24 | 1999-08-16 | An apparatus for connecting tubulars using a top drive |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2590542A Division CA2590542C (en) | 1998-08-24 | 1999-08-16 | An apparatus for connecting tubulars using a top drive |
Publications (2)
Publication Number | Publication Date |
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CA2340995A1 CA2340995A1 (en) | 2000-03-02 |
CA2340995C true CA2340995C (en) | 2007-10-16 |
Family
ID=10837691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA002340995A Expired - Lifetime CA2340995C (en) | 1998-08-24 | 1999-08-16 | An apparatus for connecting tubulars using a top drive |
Country Status (8)
Country | Link |
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US (3) | US6705405B1 (en) |
EP (1) | EP1108112B1 (en) |
AU (1) | AU5433399A (en) |
CA (1) | CA2340995C (en) |
DE (1) | DE69909297T2 (en) |
GB (1) | GB2340857A (en) |
NO (1) | NO316620B1 (en) |
WO (1) | WO2000011310A1 (en) |
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-
1998
- 1998-08-24 GB GB9818360A patent/GB2340857A/en not_active Withdrawn
-
1999
- 1999-08-16 DE DE69909297T patent/DE69909297T2/en not_active Expired - Fee Related
- 1999-08-16 WO PCT/GB1999/002708 patent/WO2000011310A1/en active IP Right Grant
- 1999-08-16 EP EP99940337A patent/EP1108112B1/en not_active Expired - Lifetime
- 1999-08-16 US US09/762,606 patent/US6705405B1/en not_active Expired - Lifetime
- 1999-08-16 CA CA002340995A patent/CA2340995C/en not_active Expired - Lifetime
- 1999-08-16 AU AU54333/99A patent/AU5433399A/en not_active Abandoned
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2001
- 2001-02-02 NO NO20010563A patent/NO316620B1/en not_active IP Right Cessation
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2004
- 2004-03-16 US US10/801,289 patent/US7090021B2/en not_active Expired - Lifetime
-
2006
- 2006-08-15 US US11/464,575 patent/US7451826B2/en not_active Expired - Fee Related
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NO316620B1 (en) | 2004-03-08 |
WO2000011310A1 (en) | 2000-03-02 |
EP1108112B1 (en) | 2003-07-02 |
CA2340995A1 (en) | 2000-03-02 |
AU5433399A (en) | 2000-03-14 |
GB2340857A (en) | 2000-03-01 |
NO20010563D0 (en) | 2001-02-02 |
US7090021B2 (en) | 2006-08-15 |
EP1108112A1 (en) | 2001-06-20 |
GB9818360D0 (en) | 1998-10-14 |
DE69909297T2 (en) | 2004-05-27 |
US20070051519A1 (en) | 2007-03-08 |
US20040173357A1 (en) | 2004-09-09 |
US7451826B2 (en) | 2008-11-18 |
US6705405B1 (en) | 2004-03-16 |
DE69909297D1 (en) | 2003-08-07 |
NO20010563L (en) | 2001-03-08 |
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