CA2278059A1 - Tubing rotator - Google Patents
Tubing rotator Download PDFInfo
- Publication number
- CA2278059A1 CA2278059A1 CA 2278059 CA2278059A CA2278059A1 CA 2278059 A1 CA2278059 A1 CA 2278059A1 CA 2278059 CA2278059 CA 2278059 CA 2278059 A CA2278059 A CA 2278059A CA 2278059 A1 CA2278059 A1 CA 2278059A1
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- Canada
- Prior art keywords
- annular body
- interior
- tubing
- seating portion
- tubing hanger
- 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.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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)
- General Details Of Gearings (AREA)
Abstract
A tubing rotator includes a first annular body and a second annular body. The second annular body is concentrically positioned within an interior bore of the first annular body.
Gears are provided to rotate the second annular body relative to the first annular body. The interior surface of the second annular body is smooth and has an interior seating portion that is tapered. A tubing hanger is provided having an exterior surface that is smooth and has an exterior seating portion that is tapered. The tapered exterior seating portion of the tubing hanger engages the tapered interior seating portion of the second annular body to form a taper lock, which couples the tubing hanger with the second annular body solely by frictional engagement.
Gears are provided to rotate the second annular body relative to the first annular body. The interior surface of the second annular body is smooth and has an interior seating portion that is tapered. A tubing hanger is provided having an exterior surface that is smooth and has an exterior seating portion that is tapered. The tapered exterior seating portion of the tubing hanger engages the tapered interior seating portion of the second annular body to form a taper lock, which couples the tubing hanger with the second annular body solely by frictional engagement.
Description
TITLE OF THE INVENTION:
Tubing rotator NAMES) OF INVENTOR(S):
Michael Wawrzynowski FIELD OF THE INVENTION
The present invention relates to a tubing rotator, and particularly, a tubing rotator for use with tubing suspended in a well from a tubing hanger.
BACKGROUND OF THE INVENTION
Fluids may be supplied into a well or withdrawn from a well by means of tubing. Normally, tubing is suspended in a well from a tubing hanger. During the course of time, the tubing in the well tends to wear unevenly, with the consequence that weak spots are created within the sidewall of the tubing.
Worn or weakened tubing must then be withdrawn from the well to effect replacement or repairs, resulting in downtime and loss of productivity from the well. To counter the development of uneven wear of the tubing, tubing rotators have been developed which ;slowly rotate the tubing.
Tubing rotators presently in use employ an interlocking engagement in the form of either keys or splines. Misalignment can damage the splines or similar interlocking engagement.
Consequently, great effort and care are required to properly install existing tubing rotators to ensure proper alignment.
3 0 SUL~IARY OF THE INVENTION
What is required is a tubing rotator that can be rapidly installed and removed without risk of damage due to misalignment.
According to the present invention there is provided a tubing rotator which includes a first annular body and a second annular body. The first annular body has an interior surface def fining an inter_ for bore . The second annular body has a f first end, a second end, an exterior surface and an interior surface defining an interior bore. The second annular body is concentrically positioned within the interior bore of the first annular body. A driven gear is mounted to the exterior surface of the second annular body. A driving gear engages the driven gear to impart a force to rotate the second annular body relative to the first annular body. The interior surface of the second annular body is smooth and has an interior seating portion that is inwardly tapered from the first end toward the second end. A tubing hanger is provided having a first end, a second end and an exterior surface. The exterior surface of the tubing hanger. is smooth and has an exterior seating portion that is tapered i:rom the first end toward the second end. The tubing hanger is concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the 'tubing hanger engaging the interior seating portion of the second annular body.
The tubing rotator, as described above, relies solely upon a tapered locking engagement between the exterior seating portion of the tubing hanger and the interior seating portion of the second annular body. The system is self aligning.
Once the teachings of the present invention are understood, there are variations that can be made in terms of gear and bearing configurations. A preferred embodiment will hereinafter be described that discloses preferred gear and bearing conf igur<~tions .
Although beneficial results may be obtained through the use of the tubing rotator as described above, there may be some applications in which it is undesirable to rely solely upon the weight of the underlying tubing to force the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body. In such applications one or more pressure members can be used to exert a seating force. One configuration that will hereinafter be further describE~d, has several inclined planes positioned adjacent the first end of the tubing hanger. Several pressure members are secured to either the first annular body or the second annular body. The pressure members engage the inclined plane to force the tubing hanger toward the second annular body. This forces the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 is a side elevation view, in section, of a tubing rotator constructed in accordance with the teachings of the present invention.
FIGURE 2 is a top plan view, in section, of the tubing rotator illustrated in FIGURE 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a tubing rotator generally identified by reference numeral 10, will now be described with reference to FIGURES 1 and 2.
Referring to FIGURE 1, tubing rotator 10 includes a first annular body 12 <~nd a second annular body 14. Tubing rotator 10 has a first end 11 and a second end 13. First annular body 12 has an interior surface 16 defining an interior bore 18.
Second annular body 14 has a first end 20, a second end 22, an exterior surface 24 and an interior surface 26 defining an interior bore 28. Second annular body 14 is concentrically positioned within interior bore 18 of first annular body 12.
Referring to FIGURE 2, a driven gear 30 is mounted to exterior surface 24 of second annular body 14. Referring to FIGURE 1, a bushing 32 is disposed between exterior surface 24 of second annular body 14 and interior surface 16 of first annular body 12, thereby providing a radial bearing surface. A thrust bearing 36 is disposed between exterior surface 24 of second annular body 14 and interior surface 16 of first annular body 12 .
Referring to FIGURE 2, a driving gear 38 is positioned in a gear chamber 40 in first annular body 12. Gear chamber 40 extends angular7Ly from an exterior surface 80 into first annular body 12. An interior surface 82 of gear chamber 40 intersects with interior surface 16 of first annular body 12 to create an opening 84. A remote end 86 of gear chamber 40 extends past opening 84. Driving gear 38 is a worm gear that has a connection end 88, a remote end 90, and an exterior surface 92. Connection end 88 is intended to be connected to a motor or a hand crank by means of which driving gear 38 is rotated. Exterior surface 92 of driving gear 38 has a threaded portion 94 that engages driven gear 30 through opening 84.
Rotation of driving gear 38 imparts a force on driven gear 30 to rotate second annular body 14 relative to first annular body 12. Driving gear- 38 is rotatably mounted with bearings 95 and has a seal assembly 96 to prevent leakage of lubricant from gear chamber 40 past connection end 88. A lubrication chamber 42 in first annular body 12 is in fluid communication with driven gear 30, so that driven gear 30 is continuously lubricated as it rotates.
Referring to FIGURE l, interior surface 26 of second annular body 14 is smooth and has an interior seating portion 44 that is inwardly tapered from first end 20 toward second end 22. A tubing hanger 46 is provided that has a first end 48, a second end 50 and an exterior surface 52. Exterior surface 52 of tubing hanger 46 is smooth and has an exterior seating portion 54 that i.s tapered from first end 48 toward second end 50. Tubing hanger 46 is concentrically positioned within interior bore 28 of second annular body 14, with exterior seating portion 54 of tubing hanger 46 engaging interior seating portion 44 of second annular body 14. A rotating bearing 100 over7_ies a circumferential shoulder 102 on exterior surface 52 of hanger 46. A bushing 104 is disposed between 5 exterior surface tubing hanger 46 and rotating bearing 100, thereby providing a radial bearing surface. A locking sleeve 106 and a top plate 108 close first end 11 of tubing rotator between a first end 62 of first annular body 12 and first end 48 of tubing hanger 46. Rotating bearing 100 has an upper 10 inclined plane ~;urface 56. Several pressure members in the form of anchor bolts 58 are secured to first annular body 12.
Anchor bolts 58 engage upper inclined plane surface 56 on rotating bearing 100. This forces tubing hanger 46 toward second annular body 14, thereby forcing exterior seating portion 54 of tubing hanger 46 into engagement with interior seating portion 44 of second annular body 14, while accommodating relative rotational movement.
Referring t:o FIGURE 1, first annular body 12 has a peripheral flange 60 at a first end 62 through which are bored a plurality of axial bolt receiving holes 64 and a plurality of radial cavities 66. An interior surface 68 of each radial cavity 66 is threaded so as to matingly engage a threaded portion 70 of anchor bolts 70. A peripheral collar 72 is at a second end 63 of first annular body 12. Peripheral collar 72 has a first end 74 and a second end 76. A plurality of threaded axial bolt receiving cavities 78 extends from second end 76 toward first end 74 of peripheral collar 72. A series of seals 110 and seals 112 are provided to maintain contain pressure.
First end 6~? of first annular body 12 and first end 48 of tubing hanger 46,, together with the outer surfaces of locking sleeve 106 and t.op plate 108 are substantially coplanar and form first end 11 of tubing rotator 10. Second end 63 of first annular body 12, second end 22 of second annular body 14, and second end 50 of tubing hanger 46 are substantially coplanar and form second end 13 of tubing rotator 10.
The use and operation of tubing rotator 10 will now be described with :reference to FIGURES 1 and 2. In order to remove tubing hanger 46, anchor bolts 58 are retracted and locking sleeve 106 as well as top plate 108 are removed. V~Ihen tubing hanger 46 is reinstalled after maintenance is performed, tubing hanger 46 is concentrically positioned within interior bore 28 of second annular body 14, with exterior seating portion 54 of tubing hanger 46 engaging interior seating portion 44 of second annular body 14. Tubing hanger 46 need not be placed in any particular orientation, as the tapered locking engagement between exterior seating portion 54 and interior seating portion 44 is substantially self aligning.
Anchor bolts 58 are then used to exert pressure to bring exterior seating portion 54 of tubing hanger 46 into tighter engagement with :interior seating portion 44 of second annular body 14. A motor or hand crank (not shown) imparts a rotational force to driving gear 38, which acts upon driven gear 30 positioned on exterior surface 24 of second annular body 14 to rotate second annular body 14. Anchor bolts 58 engage inclined ;plane surfaces 56 on bearing race 100. This enables pressure to be applied notwithstanding rotation of second annular body 14 along with tubing hanger 46.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Tubing rotator NAMES) OF INVENTOR(S):
Michael Wawrzynowski FIELD OF THE INVENTION
The present invention relates to a tubing rotator, and particularly, a tubing rotator for use with tubing suspended in a well from a tubing hanger.
BACKGROUND OF THE INVENTION
Fluids may be supplied into a well or withdrawn from a well by means of tubing. Normally, tubing is suspended in a well from a tubing hanger. During the course of time, the tubing in the well tends to wear unevenly, with the consequence that weak spots are created within the sidewall of the tubing.
Worn or weakened tubing must then be withdrawn from the well to effect replacement or repairs, resulting in downtime and loss of productivity from the well. To counter the development of uneven wear of the tubing, tubing rotators have been developed which ;slowly rotate the tubing.
Tubing rotators presently in use employ an interlocking engagement in the form of either keys or splines. Misalignment can damage the splines or similar interlocking engagement.
Consequently, great effort and care are required to properly install existing tubing rotators to ensure proper alignment.
3 0 SUL~IARY OF THE INVENTION
What is required is a tubing rotator that can be rapidly installed and removed without risk of damage due to misalignment.
According to the present invention there is provided a tubing rotator which includes a first annular body and a second annular body. The first annular body has an interior surface def fining an inter_ for bore . The second annular body has a f first end, a second end, an exterior surface and an interior surface defining an interior bore. The second annular body is concentrically positioned within the interior bore of the first annular body. A driven gear is mounted to the exterior surface of the second annular body. A driving gear engages the driven gear to impart a force to rotate the second annular body relative to the first annular body. The interior surface of the second annular body is smooth and has an interior seating portion that is inwardly tapered from the first end toward the second end. A tubing hanger is provided having a first end, a second end and an exterior surface. The exterior surface of the tubing hanger. is smooth and has an exterior seating portion that is tapered i:rom the first end toward the second end. The tubing hanger is concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the 'tubing hanger engaging the interior seating portion of the second annular body.
The tubing rotator, as described above, relies solely upon a tapered locking engagement between the exterior seating portion of the tubing hanger and the interior seating portion of the second annular body. The system is self aligning.
Once the teachings of the present invention are understood, there are variations that can be made in terms of gear and bearing configurations. A preferred embodiment will hereinafter be described that discloses preferred gear and bearing conf igur<~tions .
Although beneficial results may be obtained through the use of the tubing rotator as described above, there may be some applications in which it is undesirable to rely solely upon the weight of the underlying tubing to force the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body. In such applications one or more pressure members can be used to exert a seating force. One configuration that will hereinafter be further describE~d, has several inclined planes positioned adjacent the first end of the tubing hanger. Several pressure members are secured to either the first annular body or the second annular body. The pressure members engage the inclined plane to force the tubing hanger toward the second annular body. This forces the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 is a side elevation view, in section, of a tubing rotator constructed in accordance with the teachings of the present invention.
FIGURE 2 is a top plan view, in section, of the tubing rotator illustrated in FIGURE 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a tubing rotator generally identified by reference numeral 10, will now be described with reference to FIGURES 1 and 2.
Referring to FIGURE 1, tubing rotator 10 includes a first annular body 12 <~nd a second annular body 14. Tubing rotator 10 has a first end 11 and a second end 13. First annular body 12 has an interior surface 16 defining an interior bore 18.
Second annular body 14 has a first end 20, a second end 22, an exterior surface 24 and an interior surface 26 defining an interior bore 28. Second annular body 14 is concentrically positioned within interior bore 18 of first annular body 12.
Referring to FIGURE 2, a driven gear 30 is mounted to exterior surface 24 of second annular body 14. Referring to FIGURE 1, a bushing 32 is disposed between exterior surface 24 of second annular body 14 and interior surface 16 of first annular body 12, thereby providing a radial bearing surface. A thrust bearing 36 is disposed between exterior surface 24 of second annular body 14 and interior surface 16 of first annular body 12 .
Referring to FIGURE 2, a driving gear 38 is positioned in a gear chamber 40 in first annular body 12. Gear chamber 40 extends angular7Ly from an exterior surface 80 into first annular body 12. An interior surface 82 of gear chamber 40 intersects with interior surface 16 of first annular body 12 to create an opening 84. A remote end 86 of gear chamber 40 extends past opening 84. Driving gear 38 is a worm gear that has a connection end 88, a remote end 90, and an exterior surface 92. Connection end 88 is intended to be connected to a motor or a hand crank by means of which driving gear 38 is rotated. Exterior surface 92 of driving gear 38 has a threaded portion 94 that engages driven gear 30 through opening 84.
Rotation of driving gear 38 imparts a force on driven gear 30 to rotate second annular body 14 relative to first annular body 12. Driving gear- 38 is rotatably mounted with bearings 95 and has a seal assembly 96 to prevent leakage of lubricant from gear chamber 40 past connection end 88. A lubrication chamber 42 in first annular body 12 is in fluid communication with driven gear 30, so that driven gear 30 is continuously lubricated as it rotates.
Referring to FIGURE l, interior surface 26 of second annular body 14 is smooth and has an interior seating portion 44 that is inwardly tapered from first end 20 toward second end 22. A tubing hanger 46 is provided that has a first end 48, a second end 50 and an exterior surface 52. Exterior surface 52 of tubing hanger 46 is smooth and has an exterior seating portion 54 that i.s tapered from first end 48 toward second end 50. Tubing hanger 46 is concentrically positioned within interior bore 28 of second annular body 14, with exterior seating portion 54 of tubing hanger 46 engaging interior seating portion 44 of second annular body 14. A rotating bearing 100 over7_ies a circumferential shoulder 102 on exterior surface 52 of hanger 46. A bushing 104 is disposed between 5 exterior surface tubing hanger 46 and rotating bearing 100, thereby providing a radial bearing surface. A locking sleeve 106 and a top plate 108 close first end 11 of tubing rotator between a first end 62 of first annular body 12 and first end 48 of tubing hanger 46. Rotating bearing 100 has an upper 10 inclined plane ~;urface 56. Several pressure members in the form of anchor bolts 58 are secured to first annular body 12.
Anchor bolts 58 engage upper inclined plane surface 56 on rotating bearing 100. This forces tubing hanger 46 toward second annular body 14, thereby forcing exterior seating portion 54 of tubing hanger 46 into engagement with interior seating portion 44 of second annular body 14, while accommodating relative rotational movement.
Referring t:o FIGURE 1, first annular body 12 has a peripheral flange 60 at a first end 62 through which are bored a plurality of axial bolt receiving holes 64 and a plurality of radial cavities 66. An interior surface 68 of each radial cavity 66 is threaded so as to matingly engage a threaded portion 70 of anchor bolts 70. A peripheral collar 72 is at a second end 63 of first annular body 12. Peripheral collar 72 has a first end 74 and a second end 76. A plurality of threaded axial bolt receiving cavities 78 extends from second end 76 toward first end 74 of peripheral collar 72. A series of seals 110 and seals 112 are provided to maintain contain pressure.
First end 6~? of first annular body 12 and first end 48 of tubing hanger 46,, together with the outer surfaces of locking sleeve 106 and t.op plate 108 are substantially coplanar and form first end 11 of tubing rotator 10. Second end 63 of first annular body 12, second end 22 of second annular body 14, and second end 50 of tubing hanger 46 are substantially coplanar and form second end 13 of tubing rotator 10.
The use and operation of tubing rotator 10 will now be described with :reference to FIGURES 1 and 2. In order to remove tubing hanger 46, anchor bolts 58 are retracted and locking sleeve 106 as well as top plate 108 are removed. V~Ihen tubing hanger 46 is reinstalled after maintenance is performed, tubing hanger 46 is concentrically positioned within interior bore 28 of second annular body 14, with exterior seating portion 54 of tubing hanger 46 engaging interior seating portion 44 of second annular body 14. Tubing hanger 46 need not be placed in any particular orientation, as the tapered locking engagement between exterior seating portion 54 and interior seating portion 44 is substantially self aligning.
Anchor bolts 58 are then used to exert pressure to bring exterior seating portion 54 of tubing hanger 46 into tighter engagement with :interior seating portion 44 of second annular body 14. A motor or hand crank (not shown) imparts a rotational force to driving gear 38, which acts upon driven gear 30 positioned on exterior surface 24 of second annular body 14 to rotate second annular body 14. Anchor bolts 58 engage inclined ;plane surfaces 56 on bearing race 100. This enables pressure to be applied notwithstanding rotation of second annular body 14 along with tubing hanger 46.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (17)
1. A tubing rotator, comprising:
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body, a driven gear being mounted to the exterior surface of the second annular body;
a driving gear engaging the driven gear to impart a force to rotate the second annular body relative to the first annular body;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body.
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body, a driven gear being mounted to the exterior surface of the second annular body;
a driving gear engaging the driven gear to impart a force to rotate the second annular body relative to the first annular body;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body.
2. The tubing rotator as defined in Claim 1, wherein the driving gear is positioned in a gear chamber in the first annular body.
3. The tubing rotator as defined in Claim 1, wherein the driving gear is a worm gear.
4. The tubing rotator as defined in Claim 1, wherein a radial bearing is disposed between the exterior surface of the second annular body anal the interior surface of the first annular body.
5. The tubing rotator as defined in Claim 4, wherein the radial bearing is a bushing.
6. The tubing rotator as defined in Claim 1, wherein a lubrication chamber in the first annular body communicates with the driven gear.
7. The tubing rotator as defined in Claim 1, wherein a thrust bearing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body.
8. The tubing rotator as defined in Claim. l, wherein at least one pressure member is provided to force the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body.
9. The tubing rotator as defined in Claim 8, wherein at least one inclined plane is positioned adjacent the first end of the tubing hanger and the at least one pressure member is secured to one of the first annular body and the second annular body, the at least one pressure member engaging the inclined plane to force the tubing hanger toward the second annular body, thereby forcing the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body.
10. The tubing rotator as defined in Claim 9, wherein a rotating bearing is positioned at the first end of the tubing hanger, the rotating bearing having an upper inclined plane surface .
11. A tubing rotator, comprising:
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body, a driven gear being mounted to the exterior surface of the second annular body;
a radial bearing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body;
a thrust bearing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body;
a driving gear positioned in a gear chamber in the first annular body, the driving gear engaging the driven gear to impart a force to rotate the second annular body relative to the first annular body;
a lubrication chamber in the first annular body in fluid communication with the driven gear;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body.
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body, a driven gear being mounted to the exterior surface of the second annular body;
a radial bearing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body;
a thrust bearing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body;
a driving gear positioned in a gear chamber in the first annular body, the driving gear engaging the driven gear to impart a force to rotate the second annular body relative to the first annular body;
a lubrication chamber in the first annular body in fluid communication with the driven gear;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body.
12. The tubing rotator as defined in Claim 11, wherein the driving gear is a worm gear.
13. The tubing rotator as defined in Claim 11, wherein the radial bearing is a bushing.
14. The tubing rotator as defined in Claim 11, wherein at least one inclined plane is positioned adjacent the first end of the tubing hanger and at least one pressure member is secured to one of the first annular body and the second annular body, the at least one pressure member engaging the inclined plane to force the tubing hanger toward the second annular body, thereby forcing the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body.
15. The tubing rotator as defined in Claim 12, wherein a rotating bearing is positioned at the first end of the tubing hanger, the rotating bearing having an upper inclined plane surface .
16. A tubing rotator, comprising:
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body, a driven gear being mounted to the exterior surface of the second annular body;
a bushing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body, thereby providing a radial bearing surface;
a thrust bearing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body;
a driving gear positioned in a gear chamber in the first annular body, the driving gear being a worm gear that engages the driven gear to impart a force to rotate the second annular body relative to the first annular body;
a lubrication chamber in the first annular body in fluid communication with the driven gear;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body; and a rotating bearing with an upper incline plane surface being positioned at the first end of the tubing hanger and several pressure members being secured to the first annular body, the pressure members engaging the upper inclined plane surface to force the tubing hanger toward the second annular body, thereby forcing the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body.
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body, a driven gear being mounted to the exterior surface of the second annular body;
a bushing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body, thereby providing a radial bearing surface;
a thrust bearing is disposed between the exterior surface of the second annular body and the interior surface of the first annular body;
a driving gear positioned in a gear chamber in the first annular body, the driving gear being a worm gear that engages the driven gear to impart a force to rotate the second annular body relative to the first annular body;
a lubrication chamber in the first annular body in fluid communication with the driven gear;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body; and a rotating bearing with an upper incline plane surface being positioned at the first end of the tubing hanger and several pressure members being secured to the first annular body, the pressure members engaging the upper inclined plane surface to force the tubing hanger toward the second annular body, thereby forcing the exterior seating portion of the tubing hanger into engagement with the interior seating portion of the second annular body.
17. A tubing rotator, comprising:
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body;
a gear assembly for rotating the second annular body relative to the first annular body;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body to form a taper lock which couples the tubing hanger with the second annular body solely by frictional engagement.
a first annular body having an interior surface defining an interior bore;
a second annular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the second annular body being concentrically positioned within the interior bore of the first annular body;
a gear assembly for rotating the second annular body relative to the first annular body;
the interior surface of the second annular body being smooth and having an interior seating portion that is inwardly tapered from the first end toward the second end;
a tubing hanger having a first end, a second end and an exterior surface, the exterior surface of the tubing hanger being smooth and having an exterior seating portion that is tapered from the first end toward the second end, the tubing hanger being concentrically positioned within the interior bore of the second annular body, with the exterior seating portion of the tubing hanger engaging the interior seating portion of the second annular body to form a taper lock which couples the tubing hanger with the second annular body solely by frictional engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2278059 CA2278059A1 (en) | 1999-07-19 | 1999-07-19 | Tubing rotator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2278059 CA2278059A1 (en) | 1999-07-19 | 1999-07-19 | Tubing rotator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2278059A1 true CA2278059A1 (en) | 2001-01-19 |
Family
ID=4163796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2278059 Abandoned CA2278059A1 (en) | 1999-07-19 | 1999-07-19 | Tubing rotator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2278059A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6640892B1 (en) | 2002-06-03 | 2003-11-04 | Gadu, Inc. | Tubing string rotator |
| US7306031B2 (en) | 2004-07-15 | 2007-12-11 | Gadu, Inc. | Tubing string rotator and method |
-
1999
- 1999-07-19 CA CA 2278059 patent/CA2278059A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6640892B1 (en) | 2002-06-03 | 2003-11-04 | Gadu, Inc. | Tubing string rotator |
| US7306031B2 (en) | 2004-07-15 | 2007-12-11 | Gadu, Inc. | Tubing string rotator and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |