CA2254480C - Tubing rotator - Google Patents
Tubing rotator Download PDFInfo
- Publication number
- CA2254480C CA2254480C CA 2254480 CA2254480A CA2254480C CA 2254480 C CA2254480 C CA 2254480C CA 2254480 CA2254480 CA 2254480 CA 2254480 A CA2254480 A CA 2254480A CA 2254480 C CA2254480 C CA 2254480C
- Authority
- CA
- Canada
- Prior art keywords
- rotator
- mandrel
- tubing
- dognut
- wellhead
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0415—Casing heads; Suspending casings or tubings in well heads rotating or floating support for tubing or casing hanger
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
A tubing rotator and hanger connects to a wellhead having a wellhead flange. The rotator has a main body which includes a rotator flange mountable on a top side of the wellhead flange. A bore extends through the rotator body for inserting a mandrel therethrough. A load shoulder on a top end of the mandrel is supported by bearings on the rotator body. A removable split ring is located within an annular recess around the top end of the mandrel for connecting the mandrel to the load shoulder. A dognut is connected to a bottom end of the mandrel such that the dognut is disengaged from the wellhead during rotation of the tubing. A gear set within the rotator body rotates the mandrel in relation to the rotator body for rotating the tubing. A pair of pressure test ports connect an inner face of the rotator body to an outer face of the rotator body for monitoring pressure within the tubing rotator and hanger. A method is provided for removing the rotator body from the wellhead. The method includes connecting a pick up sub to an upper end of the mandrel for raising the mandrel such that the split ring may be removed. The mandrel is then lowered such that the dognut is seated within the wellhead. The pick up sub is then disconnected so the rotator body may be lifted from the wellhead.
Description
TUBING ROTATOR
FIELD OF THE INVENTION
The present invention relates to tubing rotators for mounting on a wellhead for hanging and rotating a tubing string in a well bore.
BACKGROUND
Tubing rotators are mounted on wellheads for rotating a production tubing string. Rotation of the tubing distributes wear caused by contact with a rod string driving a down hole pump for extending the life of the tubing.
Removal of known rotators requires pulling up the tubing and clamping the tubing before removing the rotator. This is a time consuming procedure which requires additional equipment.
Known rotators which make use of a dognut to support the weight of the tubing while the tubing is rotated require modification to the existing wellhead and dognut to include a swivel mechanism. Installation of a modified dognut is an undesirable expense.
SUMMARY
According to one aspect of the present invention there is provided a tubing rotator and hanger for a wellhead having a wellhead flange and a dognut seat, said tubing rotator and hanger comprising:
a rotator body including a rotator flange mountable on a top side of the wellhead flange and a through bore;
a mandrel extending through the bore in the rotator body;
a dognut connected to the mandrel below the rotator flange;
a load shoulder on the mandrel for hanging tubing from the rotator body with the dognut disengaged from the dognut seat;
bearing means for supporting the load shoulder rotatably on the rotator body; and a gear set within the rotator body for rotating the mandrel.
Preferably the load shoulder is selectively separable from the mandrel such that when the load shoulder is separated from the mandrel the dognut may be seated within the wellhead for supporting the tubing while removing the tubing rotator. This can be done using a removable split ring located within an annular recess in the mandrel for supporting the mandrel on the load shoulder.
One or more pressure test ports may extend radially through the rotator body between its inner and outer face of the rotator body for monitoring pressure within the tubing rotator and hanger.
There is provided a plurality of bolt holes which extend through the rotator body in a preferred embodiment for inserting a bolt therethrough. This requires only a single nut and bolt to be fastened at each bolt hole rather than a pair of bolts which would otherwise be studded up and down if the bolt holes did not extend through the rotator body.
The mandrel preferably includes an internal thread at a top end for connecting to a pick up sub. An external thread at a bottom end thereof may be included for connecting to an internal thread at a top end of the dognut. The dognut may also include an internal thread at a bottom end thereof for connection to a tubing string.
The gear set may comprise a drive gear mounted on the rotator body, means for rotating the drive gear and a driven gear mounted on the mandrel and engaged with the drive gear for rotating the mandrel when driven by the drive gear.
According to a second aspect of the present invention there is provided a tubing rotator and hanger for a wellhead having a wellhead flange and a dognut seat, said tubing rotator and hanger comprising:
FIELD OF THE INVENTION
The present invention relates to tubing rotators for mounting on a wellhead for hanging and rotating a tubing string in a well bore.
BACKGROUND
Tubing rotators are mounted on wellheads for rotating a production tubing string. Rotation of the tubing distributes wear caused by contact with a rod string driving a down hole pump for extending the life of the tubing.
Removal of known rotators requires pulling up the tubing and clamping the tubing before removing the rotator. This is a time consuming procedure which requires additional equipment.
Known rotators which make use of a dognut to support the weight of the tubing while the tubing is rotated require modification to the existing wellhead and dognut to include a swivel mechanism. Installation of a modified dognut is an undesirable expense.
SUMMARY
According to one aspect of the present invention there is provided a tubing rotator and hanger for a wellhead having a wellhead flange and a dognut seat, said tubing rotator and hanger comprising:
a rotator body including a rotator flange mountable on a top side of the wellhead flange and a through bore;
a mandrel extending through the bore in the rotator body;
a dognut connected to the mandrel below the rotator flange;
a load shoulder on the mandrel for hanging tubing from the rotator body with the dognut disengaged from the dognut seat;
bearing means for supporting the load shoulder rotatably on the rotator body; and a gear set within the rotator body for rotating the mandrel.
Preferably the load shoulder is selectively separable from the mandrel such that when the load shoulder is separated from the mandrel the dognut may be seated within the wellhead for supporting the tubing while removing the tubing rotator. This can be done using a removable split ring located within an annular recess in the mandrel for supporting the mandrel on the load shoulder.
One or more pressure test ports may extend radially through the rotator body between its inner and outer face of the rotator body for monitoring pressure within the tubing rotator and hanger.
There is provided a plurality of bolt holes which extend through the rotator body in a preferred embodiment for inserting a bolt therethrough. This requires only a single nut and bolt to be fastened at each bolt hole rather than a pair of bolts which would otherwise be studded up and down if the bolt holes did not extend through the rotator body.
The mandrel preferably includes an internal thread at a top end for connecting to a pick up sub. An external thread at a bottom end thereof may be included for connecting to an internal thread at a top end of the dognut. The dognut may also include an internal thread at a bottom end thereof for connection to a tubing string.
The gear set may comprise a drive gear mounted on the rotator body, means for rotating the drive gear and a driven gear mounted on the mandrel and engaged with the drive gear for rotating the mandrel when driven by the drive gear.
According to a second aspect of the present invention there is provided a tubing rotator and hanger for a wellhead having a wellhead flange and a dognut seat, said tubing rotator and hanger comprising:
a rotator body including a rotator flange mountable on a top side of the wellhead flange, a through bore extending through the rotator body, and a counter bore extending from a top side of the rotator body and defining a shoulder around an inner face of the through bore;
a mandrel extending through the through bore in the rotator body;
a dognut connected to the mandrel below the rotator flange and having a bottom face for engaging the dognut seat;
a load shoulder on the mandrel for hanging tubing from the rotator body;
bearing means for supporting the load shoulder rotatably on the shoulder around the inner face of the through bore; and a gear set within the rotator body for rotating the mandrel wherein a vertical spacing between the shoulder and the dognut seat is greater than a vertical spacing between a bottom face of the bearing means and the bottom face of the dognut such that the dognut is disengaged from the dognut seat when the tubing is hanging from the load shoulder on the mandrel.
According to a further aspect of the present invention there is provided a method for removing a tubing rotator from a well having a wellhead, tubing extending downhole from the wellhead and a dognut connected to the tubing for suspending the tubing from the wellhead, said method comprising:
providing a mandrel for hanging the tubing therefrom;
providing tubing support means for supporting the mandrel rotatably on the tubing rotator such that the dognut is disengaged from the wellhead;
lifting the mandrel such that the mandrel is disengaged from the rotator body;
removing the tubing support means;
a mandrel extending through the through bore in the rotator body;
a dognut connected to the mandrel below the rotator flange and having a bottom face for engaging the dognut seat;
a load shoulder on the mandrel for hanging tubing from the rotator body;
bearing means for supporting the load shoulder rotatably on the shoulder around the inner face of the through bore; and a gear set within the rotator body for rotating the mandrel wherein a vertical spacing between the shoulder and the dognut seat is greater than a vertical spacing between a bottom face of the bearing means and the bottom face of the dognut such that the dognut is disengaged from the dognut seat when the tubing is hanging from the load shoulder on the mandrel.
According to a further aspect of the present invention there is provided a method for removing a tubing rotator from a well having a wellhead, tubing extending downhole from the wellhead and a dognut connected to the tubing for suspending the tubing from the wellhead, said method comprising:
providing a mandrel for hanging the tubing therefrom;
providing tubing support means for supporting the mandrel rotatably on the tubing rotator such that the dognut is disengaged from the wellhead;
lifting the mandrel such that the mandrel is disengaged from the rotator body;
removing the tubing support means;
lowering the mandrel such that the dognut is seated on the wellhead for supporting the tubing; and removing the rotator body from the wellhead.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a side view of the tubing rotator shown in partial cross section; and Figure 2 is a top view of the tubing rotator with one side of the tubing rotator shown in cross section.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a tubing rotator and hanger generally indicated by the number 10. The rotator 10 mounts on a wellhead 12 to be supported by a wellhead flange 14. An upper portion 16 of the wellhead mounts on top of the rotator.
The rotator 10 includes a rotator body 18. A rotator flange 20 extends radially outward over the wellhead flange 14 for connecting the rotator to the wellhead. A plurality of bolt holes 22 extend through the rotator flange 20 for securing the rotator flange between the wellhead 12 and the upper portion of the wellhead 16 with a plurality of bolts 24. The through bolt holes allow the use of a single bolt at each bolt hole location rather than a pair of bolts at each location wherein one bolt is studded through a top side and the other is studded through a bottom side.
A bore 26 extends through the rotator body 18 from a top side 28 to a bottom side 30. A first counter bore 32 extends from the top side 28 part way through the rotator body and ends at an inclined shoulder 34. A second counter bore 36 extends from thP inclined shoulder 34 towards the bottom side 30 and ends at a square shoulder 38.
A(oad shoulder 40 in the form of a collar is located within the first counter bore 32 and includes a sleeve portion 42 which extends along an inner face of the through bore 26. A mandrel 44 is inserted through the bore 26. A key 46 connects the sleeve portion 42 to the mandrel 44. A split ring 48 is secured within an annular recess 49 on the mandrel 44 for mounting the mandrel on the load shoulder 40 for supporting the load of the tubing.
Within the second counter bore 36 is a thrust bearing 50 for supporting the axial loads of the tubing string on the tubing rotator. The thrust bearing 50 rests on the square shoulder 38 beneath a ring gear 52. The ring gear is driven by a worm gear 54 located within a bore 56. The ring gear 52 is connected to the load shoulder 40 for rotation of the tubing with the ring gear by a plurality of pins 57.
A radial bearing 58 is located around an inner face 60 of the through bore 26 near the bottom side 30 of the rotator body for supporting the radial loads on the rotator. An additional radial bearing 62 is located around an inner face 64 of the first counter bore 32.
Sealing is provided by a number of 0-rings. A first pair of 0-ring seals 66 are located around the inner face 60 of the through bore 26 near the bottom side 30 of the rotator body. A second pair of 0-ring seals 68 are located around the inner face 64 of the first counter bore 32. A third pair of 0-ring seals 70 are located around an outer face 72 of the mandrel 44.
An upper ring gasket 74 is located within an upper annular groove 76 for sealing between the top side 28 of the rotator and the upper portion 16 of the wellhead. A lower ring gasket 78 is located within a lower annular groove 80 for sealing between the bottom side 30 of the rotator and the wellhead flange 14.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a side view of the tubing rotator shown in partial cross section; and Figure 2 is a top view of the tubing rotator with one side of the tubing rotator shown in cross section.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a tubing rotator and hanger generally indicated by the number 10. The rotator 10 mounts on a wellhead 12 to be supported by a wellhead flange 14. An upper portion 16 of the wellhead mounts on top of the rotator.
The rotator 10 includes a rotator body 18. A rotator flange 20 extends radially outward over the wellhead flange 14 for connecting the rotator to the wellhead. A plurality of bolt holes 22 extend through the rotator flange 20 for securing the rotator flange between the wellhead 12 and the upper portion of the wellhead 16 with a plurality of bolts 24. The through bolt holes allow the use of a single bolt at each bolt hole location rather than a pair of bolts at each location wherein one bolt is studded through a top side and the other is studded through a bottom side.
A bore 26 extends through the rotator body 18 from a top side 28 to a bottom side 30. A first counter bore 32 extends from the top side 28 part way through the rotator body and ends at an inclined shoulder 34. A second counter bore 36 extends from thP inclined shoulder 34 towards the bottom side 30 and ends at a square shoulder 38.
A(oad shoulder 40 in the form of a collar is located within the first counter bore 32 and includes a sleeve portion 42 which extends along an inner face of the through bore 26. A mandrel 44 is inserted through the bore 26. A key 46 connects the sleeve portion 42 to the mandrel 44. A split ring 48 is secured within an annular recess 49 on the mandrel 44 for mounting the mandrel on the load shoulder 40 for supporting the load of the tubing.
Within the second counter bore 36 is a thrust bearing 50 for supporting the axial loads of the tubing string on the tubing rotator. The thrust bearing 50 rests on the square shoulder 38 beneath a ring gear 52. The ring gear is driven by a worm gear 54 located within a bore 56. The ring gear 52 is connected to the load shoulder 40 for rotation of the tubing with the ring gear by a plurality of pins 57.
A radial bearing 58 is located around an inner face 60 of the through bore 26 near the bottom side 30 of the rotator body for supporting the radial loads on the rotator. An additional radial bearing 62 is located around an inner face 64 of the first counter bore 32.
Sealing is provided by a number of 0-rings. A first pair of 0-ring seals 66 are located around the inner face 60 of the through bore 26 near the bottom side 30 of the rotator body. A second pair of 0-ring seals 68 are located around the inner face 64 of the first counter bore 32. A third pair of 0-ring seals 70 are located around an outer face 72 of the mandrel 44.
An upper ring gasket 74 is located within an upper annular groove 76 for sealing between the top side 28 of the rotator and the upper portion 16 of the wellhead. A lower ring gasket 78 is located within a lower annular groove 80 for sealing between the bottom side 30 of the rotator and the wellhead flange 14.
The seals may be tested using first and second pressure test ports 82 and 84. A circular chamber 86 is formed by a third counter bore 88 extending upwards from the bottom side 30 of the rotator. The first pressure test port connects an inner face 90 of the third counter bore 88 to an outer face-92 of the rotator. The second pressure test port 84 connects the inner face 64 of the first counter bore to the outer face 92 of the rotator. The pressure test ports allow the internal pressure of the rotator to be monitored.
The mandrel 44 includes internal threads 94 near a top end 96 of an inner face 98 of the mandrel. The internal threads 94 are for connecting a pick up sub to the mandrel for unseating the mandrel from the rotator. External threads 100 are located at a bottom end 102 of the external face 72 of the mandrel. The external threads 100 are for connecting to a first internal thread 104 of a dognut 106.
The dognut 106 is a conventional type in the form of an annular member having an outer face 108 which tapers inwards from a top end 110 to a bottom end 112. An inner face 114 of the wellhead tapers with the outer face 108 of the dognut to form a dognut seat 115 such that the dognut may be seated on the wellhead for supporting the tubing below. The tubing connects to a second internal thread 116 of the dognut. A pair of 0-rings 118 are located around the outer face 108 of the dognut for sealing between the dognut and the wellhead when the dognut is seated.
When the mandrel is connected to the load shoulder, the dognut is arranged such that a vertical spacing between the shoulder 38 and the dognut seat 115 is greater than a vertical spacing between the bearings 50 supporting the load shoulder on the shoulder 38 and the outer face 108 of the dognut. In this arrangement the dognut remains unseated from the dognut seat while the load shoulder supports the mandrel.
The mandrel 44 includes internal threads 94 near a top end 96 of an inner face 98 of the mandrel. The internal threads 94 are for connecting a pick up sub to the mandrel for unseating the mandrel from the rotator. External threads 100 are located at a bottom end 102 of the external face 72 of the mandrel. The external threads 100 are for connecting to a first internal thread 104 of a dognut 106.
The dognut 106 is a conventional type in the form of an annular member having an outer face 108 which tapers inwards from a top end 110 to a bottom end 112. An inner face 114 of the wellhead tapers with the outer face 108 of the dognut to form a dognut seat 115 such that the dognut may be seated on the wellhead for supporting the tubing below. The tubing connects to a second internal thread 116 of the dognut. A pair of 0-rings 118 are located around the outer face 108 of the dognut for sealing between the dognut and the wellhead when the dognut is seated.
When the mandrel is connected to the load shoulder, the dognut is arranged such that a vertical spacing between the shoulder 38 and the dognut seat 115 is greater than a vertical spacing between the bearings 50 supporting the load shoulder on the shoulder 38 and the outer face 108 of the dognut. In this arrangement the dognut remains unseated from the dognut seat while the load shoulder supports the mandrel.
Referring to Figure 2 the worm gear 54 is shown in a cross sectional view. At an inner end of the bore 56 a pilot shaft 120 extends from the worm gear 54 and is supported by a bearing 122. At an outer end of the bore 56 an external shaft 124 is supported by a bearing 126 and extends through an aperture in a cap 128 which contains the worm gear 54 within the bore 56. An additional pair of 0-rings 130 seal the cap 128 which is held in place by appropriate bolts 132. One of the through bolt holes 22 which would normally be located in line with the worm gear 54 is replaced by a two stud bores 134 above and below the worm gear. Cap screws are used instead of a through bolt 24 to secure the rotator flange 20 to the wellhead flange 14.
To remove the rotator from the wellhead, the bolts 24 are first removed such that the upper portion 16 of the wellhead may be removed. A pick up sub (not shown) is threadably connected to the top end 96 of the mandrel for lifting the mandrel such that the split ring 48 may be removed. Once the split ring 48 has been removed, the mandrel is disconnected from the load shoulder 40. Lowering the mandrel will seat the dognut on the wellhead thus the dognut is supporting the weight of the tubing. This will allow the pick up sub to be disconnected for removing the rotator as a single unit.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
To remove the rotator from the wellhead, the bolts 24 are first removed such that the upper portion 16 of the wellhead may be removed. A pick up sub (not shown) is threadably connected to the top end 96 of the mandrel for lifting the mandrel such that the split ring 48 may be removed. Once the split ring 48 has been removed, the mandrel is disconnected from the load shoulder 40. Lowering the mandrel will seat the dognut on the wellhead thus the dognut is supporting the weight of the tubing. This will allow the pick up sub to be disconnected for removing the rotator as a single unit.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
Claims (11)
1. A tubing rotator and hanger for a wellhead having a wellhead flange and a dognut seat, said tubing rotator and hanger comprising:
a rotator body including a rotator flange mountable on a top side of the wellhead flange and a through bore;
a mandrel extending through the bore in the rotator body;
a dognut connected to the mandrel below the rotator flange;
a load shoulder on the mandrel for hanging tubing from the rotator body with the dognut disengaged from the dognut seat;
bearing means for supporting the load shoulder rotatably on the rotator body; and a gear set within the rotator body for rotating the mandrel.
a rotator body including a rotator flange mountable on a top side of the wellhead flange and a through bore;
a mandrel extending through the bore in the rotator body;
a dognut connected to the mandrel below the rotator flange;
a load shoulder on the mandrel for hanging tubing from the rotator body with the dognut disengaged from the dognut seat;
bearing means for supporting the load shoulder rotatably on the rotator body; and a gear set within the rotator body for rotating the mandrel.
2. The tubing rotator and hanger of Claim 1 wherein the load shoulder is selectively separable from the mandrel such that when the load shoulder is separated from the mandrel the dognut may be seated within the wellhead for supporting the tubing while removing the tubing rotator.
3. The tubing rotator and hanger of Claim 1 or 2 wherein there is provided a removable split ring located within an annular recess in the mandrel for supporting the mandrel on the load shoulder.
4. The tubing rotator and hanger of Claim 1, 2 or 3 wherein there is provided one or more pressure test ports extending radially through the rotator body between an inner and outer face of the rotator body for monitoring pressure within the tubing rotator and hanger.
5. The tubing rotator and hanger of any one of Claims 1 through 4 wherein there is provided a plurality of bolt holes which extend through the rotator body for inserting a bolt therethrough.
6. The tubing rotator and hanger of any one of Claim 1 through 5 wherein the mandrel comprises an internal thread at a top end for connecting to a pick up sub.
7. The tubing rotator and hanger of any one of Claim 1 through 6 wherein the mandrel comprises an external thread at a bottom end thereof for connecting to an internal thread at a top end of the dognut.
8. The tubing rotator and hanger of any one of Claim 1 through 7 wherein the dognut comprises an internal thread at a bottom end thereof.
9. The tubing rotator and hanger of any one of Claim 1 through 8 wherein the gear set comprises a drive gear mounted on the rotator body, means for rotating the drive gear and a driven gear mounted on the mandrel and engaged with the drive gear for rotating the mandrel when driven by the drive gear.
10. A tubing rotator and hanger for a wellhead having a wellhead flange and a dognut seat, said tubing rotator and hanger comprising:
a rotator body including a rotator flange mountable on a top side of the wellhead flange, a through bore extending through the rotator body, and a counter bore extending from a top side of the rotator body and defining a shoulder around an inner face of the through bore;
a mandrel extending through the through bore in the rotator body;
a dognut connected to the mandrel below the rotator flange and having a bottom face for engaging the dognut seat;
a load shoulder on the mandrel for hanging tubing from the rotator body;
bearing means for supporting the load shoulder rotatably on the shoulder around the inner face of the through bore; and a gear set within the rotator body for rotating the mandrel wherein a vertical spacing between the shoulder and the dognut seat is greater than a vertical spacing between a bottom face of the bearing means and the bottom face of the dognut such that the dognut is disengaged from the dognut seat when the tubing is hanging from the load shoulder on the mandrel.
a rotator body including a rotator flange mountable on a top side of the wellhead flange, a through bore extending through the rotator body, and a counter bore extending from a top side of the rotator body and defining a shoulder around an inner face of the through bore;
a mandrel extending through the through bore in the rotator body;
a dognut connected to the mandrel below the rotator flange and having a bottom face for engaging the dognut seat;
a load shoulder on the mandrel for hanging tubing from the rotator body;
bearing means for supporting the load shoulder rotatably on the shoulder around the inner face of the through bore; and a gear set within the rotator body for rotating the mandrel wherein a vertical spacing between the shoulder and the dognut seat is greater than a vertical spacing between a bottom face of the bearing means and the bottom face of the dognut such that the dognut is disengaged from the dognut seat when the tubing is hanging from the load shoulder on the mandrel.
11. A method for removing a tubing rotator from a well having a wellhead, tubing extending downhole from the wellhead and a dognut connected to the tubing for suspending the tubing from the wellhead, said method comprising:
providing a mandrel for hanging the tubing therefrom;
providing tubing support means for supporting the mandrel rotatably on the tubing rotator such that the dognut is disengaged from the wellhead;
lifting the mandrel such that the mandrel is disengaged from the rotator body;
removing the tubing support means;
lowering the mandrel such that the dognut is seated on the wellhead for supporting the tubing; and removing the rotator body from the wellhead.
providing a mandrel for hanging the tubing therefrom;
providing tubing support means for supporting the mandrel rotatably on the tubing rotator such that the dognut is disengaged from the wellhead;
lifting the mandrel such that the mandrel is disengaged from the rotator body;
removing the tubing support means;
lowering the mandrel such that the dognut is seated on the wellhead for supporting the tubing; and removing the rotator body from the wellhead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2254480 CA2254480C (en) | 1998-11-19 | 1998-11-19 | Tubing rotator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2254480 CA2254480C (en) | 1998-11-19 | 1998-11-19 | Tubing rotator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2254480A1 CA2254480A1 (en) | 2000-05-19 |
| CA2254480C true CA2254480C (en) | 2007-05-29 |
Family
ID=29425716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2254480 Expired - Lifetime CA2254480C (en) | 1998-11-19 | 1998-11-19 | Tubing rotator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2254480C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2011301722B2 (en) | 2010-09-15 | 2016-01-21 | Evolution Oil Tools Inc. | Anchor for a tubing string and method |
| US10619441B2 (en) | 2017-01-06 | 2020-04-14 | Oil Lift Technology Inc. | Wellhead assembly with integrated tubing rotator |
-
1998
- 1998-11-19 CA CA 2254480 patent/CA2254480C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2254480A1 (en) | 2000-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20181119 |