CA2231614A1 - Improved no-turn tool - Google Patents
Improved no-turn tool Download PDFInfo
- Publication number
- CA2231614A1 CA2231614A1 CA 2231614 CA2231614A CA2231614A1 CA 2231614 A1 CA2231614 A1 CA 2231614A1 CA 2231614 CA2231614 CA 2231614 CA 2231614 A CA2231614 A CA 2231614A CA 2231614 A1 CA2231614 A1 CA 2231614A1
- Authority
- CA
- Canada
- Prior art keywords
- slips
- mandrel
- housing
- turn
- drag
- 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
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
Landscapes
- 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 no-turn tool for use in a well string which provides high radial extension of the slips. Such a no-turn tool comprises a mandrel with surrounding housing, and slips mounted for tangential motion in relation to the mandrel through slip apertures spaced circumferentially around the housing. A slip drive on the mandrel operatively connected to the slips, preferably by use of a pinion gear meshed with teeth on the slips, drives the slips, preferably by rotation of the mandrel, along respective tangents to the mandrel through the respective slip apertures of the housing. Drag blocks, preferably self-centering, are mounted in drag block apertures in the housing and are urged outward of the housing by springs.
The drag blocks are preferably mounted parallel to the slips for independent motion in relation to the slips. A
method of securing a downhole tool in a well, in which the method comprising the steps of providing a no-turn tool on a well string, the no-turn having slips mounted in a housing for tangential motion in relation to a mandrel mounted within the housing and driving the slips tangentially outward in relation to the mandrel until the slips engage a fixed surface.
The drag blocks are preferably mounted parallel to the slips for independent motion in relation to the slips. A
method of securing a downhole tool in a well, in which the method comprising the steps of providing a no-turn tool on a well string, the no-turn having slips mounted in a housing for tangential motion in relation to a mandrel mounted within the housing and driving the slips tangentially outward in relation to the mandrel until the slips engage a fixed surface.
Description
TITLE OF THE INVENTION
Improved No-turn Tool NAMfE(S) OF INVENTORS) Lynn P. Tessier James L. Weber FIELD OF THE INVENTTON
This invention relates to devices and methods for preventing rotation of downhole tools in a well bore.
BACKGROUND OF THE INVENTION
United States patent no. 4,811,785 issued March 14, 1989, teaches a no-turn tool in which slips are mounted circumferentially around a mandrel for outward radial movement through apertures in a housing. Cams on the mandrel urge the slips outward when the mandrel is rotated in relation to the housing. While this device provides satisfactory results, there is a limit to the extent the slips may be driven radially outward, since the mandrel and housing are necessarily thin devices for use down a well bone. This limits the applicability of the tool where the well casing or well bore are large, or have variable size.
SUr~MARY OF THE INVENTION
There is therefore a need to provide a no-turn tool that may operate with a greater range of radial outward extension of the slips. According to an aspect of they invention, such an object is met with slips that are mounted for tangential motion in relation to the mandrel.
There is therefore provided in accordance with an aspect of the invention a no-turn tool for use in a well sti:ing which provides high radial extension of the slips.
Such a no-turn tool comprises a mandrel with surrounding housing, and slips mounted for tangential motion in relation to the mandrel through slip apertures spaced circumferentially around the housing. A slip drive on the mandrel operatively connected to the slips, preferably by use of a pinion gear meshed with teeth on the slips, drives the slips, preferably by rotation of the mandrel, along respective tangents to the mandrel through the respective slip apertures of the housing.
In a further aspect of the invention, drag blocks, preferably self-centering, are mounted in drag block apertures in the housing and are urged outward of the housing by springs. The drag blocks are preferably mounted parallel to the slips for independent motion in relation to the slips.
According to a further aspect of the invention, there is provided a method of securing a downhole tool in a well, in which the method comprising the steps of:
providing a no-turn tool on a well string, the no-turn having slips mounted in a housing for tangential motion in relation to a mandrel mounted within the housing;
and.
driving the slips tangentially outward in relation to the mandrel until the slips engage a fixed surface.
The applicants have named their tool a TORQUE-STOPPERs" tool.
These and other aspects of the invention are described in the detailed description of the invention and claimed in the claims that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
There will now be described preferred embodiments of the invention, with reference to the drawings, by way of illustration only and not with the intention of limiting they scope of the invention, in which like numerals denote like elements and in which:
Fig. 1 is a plan view, partially cut away to show the: open position of the tool, showing a no-turn tool according to the invention; and Fig. 2 is a composite sectional view of a no-turn tool according to the invention, showing, at the 2 o'clock position, a section through a self-centering drag block with compression spring, at the 6 o'clock position, a drag block with stop pin, and, at the 10 o'clock position, one of the slips engaged in the casing wall.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to the figures, the no-turn tool 10 according to the invention is intended for use in a well string (not shown) but which will typically include a rotary pump in the well string above the no-turn tool 10.
Central to the no-turn tool 10 is a mandrel 12, which has an upper end threaded in conventional fashion for connection to the stator of the rotary pump above the no-turn tool 10 in the well string. The mandrel 12 extends the full length of the no-turn tool 10. A housing 14 is di~cposed, preferably concentrically, about the mandrel 12.
Three slip apertures 16 are spaced circumferentially around the: housing 14. It is possible to operate the no-turn tool 10 with fewer than three slips 18 of the present invention, but: such a configuration is not preferred. More than three slips 18 may also be used, but since the objectives of the invention are preferably accomplished with three slips 18, the:re is no need for more slips. One of the three slips 18 is mounted in each slip aperture 16 for movement tangentially in relation to the mandrel 12. In the closed poe~ition, in which the slips 18 have minimum radial extension, the tips 20 of the slips 18 coincide with the outer diameter of the housing 14. In the open position (10 o'c:lock position, Fig. 2), the slips 18 extend well beyond thE: housing outer diameter.
To move the slips 18 from the closed to open position, a slip drive 22 is provided on the mandrel 12 operatively connected to the slips 18 for driving the slips 18 along respective tangents 24 to the mandrel through the re.:pective slip apertures 16 of the housing 14. It is possible to use, as the slip drive 22, a hydraulic motor (not shown), but the objectives of the invention are readily accomplished by using the mandrel 12 to provide the driving force for the slips 18. Thus, the slip drive 22 is preferably accomplished by rotation of the mandrel 12, on which is a pinion gear 24, with the teeth of the pinion gear 24 meshed with teeth 26 on the slips 18. As the mandrel 12 rotates clockwise, as shown in Fig. 2 (right hand screw), the slips 18 are driven radially outward through the slip apertures 16.
It is necessary that the housing 14 not rotate with the mandrel 12 when the mandrel 12 is rotated. While this may be accomplished by relying upon the inertia of the housing 14, particularly in the case of a heavy housing 14, it is preferred to provide some other drag mechanism for ho7_ding the housing 14 against rotation when the mandrel 12 is being rotated.
According to a preferred embodiment of the invention, the drag means comprises drag blocks 28 mounted in drag block apertures 32 in the housing 14. In the embodiment shown, the drag block apertures 32 extend around two or three sides of the slip apertures 16 and the drag block apertures 32 and the slip apertures 16 together form recaangular apertures that are elongated along the length of the housing. The drag blocks 28 each have two elongated recesses 34, one at each longitudinal end of the drag blocks 28, which house compression springs 36. Each spring 36 is compressed between a shoulder 38 of the drag blocks 28 and a stop pin 42 mounted in a radially extending aperture 44 in the housing 14. The compression of the 5 springs 36 results in the drag blocks 28 being normally urged outward of the housing 14 by the springs 36. The drag blc>cks 28 are free to move in the drag block apertures 32 independently of the motion of the slips 18 in the slip apertures 16. Preferably, as with the slips 18, the drag blocks 28 are mounted for motion tangentially in relation to the mandrel 12, parallel to the slips 18, and there is one: drag block 28 for each of the slips 18. The stop pins 42 also limit tangential (outward) motion of the drag blocks 28.
The drag blocks 28 preferably have angled shoulders on their downhole and uphole sides to facilitate passage of the drag blocks 28 past obstructions in the well bore and casing. The faces of the slips 18 that contact the casing are preferably serrated or otherwise provided with a high friction surface to assist in gripping of the ca:cing .
In the operation of the no-turn tool 10, to secure a downhole tool, such as a pump, in a well having a casing wall 46, the no-turn tool 10 is provided on the end of a well string, with the slips 18 mounted in the housing 14 for tangential motion in relation to the mandrel 12. The drag blocks 28 are biased outward by the springs 36 into engagement with the casing wall 46. With each of the springs 36 having an approximately equal degree of compression and spring constant, the drag blocks 28 will tend to center the no-turn tool 10 in the well. When the downhole tool is in its desired operational position, the mandrel 12 is rotated to drive the slips 18 tangentially outward in relation to the mandrel 12 against the drag forces supplied by the drag blocks 28, until the slips 18 engage the fixed surface of the casing wall 46. In a well that does not have casing, the slips 18 may be driven outward until contact is made with the well bore.
According to this invention, therefore, greater radial extension of the slips 18 may be obtained as compared with conventional slips.
A person skilled in the art could make immaterial modifications to the invention described in this patent document without departing from the essence of the invention that is intended to be covered by the scope of the claims that follow.
Improved No-turn Tool NAMfE(S) OF INVENTORS) Lynn P. Tessier James L. Weber FIELD OF THE INVENTTON
This invention relates to devices and methods for preventing rotation of downhole tools in a well bore.
BACKGROUND OF THE INVENTION
United States patent no. 4,811,785 issued March 14, 1989, teaches a no-turn tool in which slips are mounted circumferentially around a mandrel for outward radial movement through apertures in a housing. Cams on the mandrel urge the slips outward when the mandrel is rotated in relation to the housing. While this device provides satisfactory results, there is a limit to the extent the slips may be driven radially outward, since the mandrel and housing are necessarily thin devices for use down a well bone. This limits the applicability of the tool where the well casing or well bore are large, or have variable size.
SUr~MARY OF THE INVENTION
There is therefore a need to provide a no-turn tool that may operate with a greater range of radial outward extension of the slips. According to an aspect of they invention, such an object is met with slips that are mounted for tangential motion in relation to the mandrel.
There is therefore provided in accordance with an aspect of the invention a no-turn tool for use in a well sti:ing which provides high radial extension of the slips.
Such a no-turn tool comprises a mandrel with surrounding housing, and slips mounted for tangential motion in relation to the mandrel through slip apertures spaced circumferentially around the housing. A slip drive on the mandrel operatively connected to the slips, preferably by use of a pinion gear meshed with teeth on the slips, drives the slips, preferably by rotation of the mandrel, along respective tangents to the mandrel through the respective slip apertures of the housing.
In a further aspect of the invention, drag blocks, preferably self-centering, are mounted in drag block apertures in the housing and are urged outward of the housing by springs. The drag blocks are preferably mounted parallel to the slips for independent motion in relation to the slips.
According to a further aspect of the invention, there is provided a method of securing a downhole tool in a well, in which the method comprising the steps of:
providing a no-turn tool on a well string, the no-turn having slips mounted in a housing for tangential motion in relation to a mandrel mounted within the housing;
and.
driving the slips tangentially outward in relation to the mandrel until the slips engage a fixed surface.
The applicants have named their tool a TORQUE-STOPPERs" tool.
These and other aspects of the invention are described in the detailed description of the invention and claimed in the claims that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
There will now be described preferred embodiments of the invention, with reference to the drawings, by way of illustration only and not with the intention of limiting they scope of the invention, in which like numerals denote like elements and in which:
Fig. 1 is a plan view, partially cut away to show the: open position of the tool, showing a no-turn tool according to the invention; and Fig. 2 is a composite sectional view of a no-turn tool according to the invention, showing, at the 2 o'clock position, a section through a self-centering drag block with compression spring, at the 6 o'clock position, a drag block with stop pin, and, at the 10 o'clock position, one of the slips engaged in the casing wall.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to the figures, the no-turn tool 10 according to the invention is intended for use in a well string (not shown) but which will typically include a rotary pump in the well string above the no-turn tool 10.
Central to the no-turn tool 10 is a mandrel 12, which has an upper end threaded in conventional fashion for connection to the stator of the rotary pump above the no-turn tool 10 in the well string. The mandrel 12 extends the full length of the no-turn tool 10. A housing 14 is di~cposed, preferably concentrically, about the mandrel 12.
Three slip apertures 16 are spaced circumferentially around the: housing 14. It is possible to operate the no-turn tool 10 with fewer than three slips 18 of the present invention, but: such a configuration is not preferred. More than three slips 18 may also be used, but since the objectives of the invention are preferably accomplished with three slips 18, the:re is no need for more slips. One of the three slips 18 is mounted in each slip aperture 16 for movement tangentially in relation to the mandrel 12. In the closed poe~ition, in which the slips 18 have minimum radial extension, the tips 20 of the slips 18 coincide with the outer diameter of the housing 14. In the open position (10 o'c:lock position, Fig. 2), the slips 18 extend well beyond thE: housing outer diameter.
To move the slips 18 from the closed to open position, a slip drive 22 is provided on the mandrel 12 operatively connected to the slips 18 for driving the slips 18 along respective tangents 24 to the mandrel through the re.:pective slip apertures 16 of the housing 14. It is possible to use, as the slip drive 22, a hydraulic motor (not shown), but the objectives of the invention are readily accomplished by using the mandrel 12 to provide the driving force for the slips 18. Thus, the slip drive 22 is preferably accomplished by rotation of the mandrel 12, on which is a pinion gear 24, with the teeth of the pinion gear 24 meshed with teeth 26 on the slips 18. As the mandrel 12 rotates clockwise, as shown in Fig. 2 (right hand screw), the slips 18 are driven radially outward through the slip apertures 16.
It is necessary that the housing 14 not rotate with the mandrel 12 when the mandrel 12 is rotated. While this may be accomplished by relying upon the inertia of the housing 14, particularly in the case of a heavy housing 14, it is preferred to provide some other drag mechanism for ho7_ding the housing 14 against rotation when the mandrel 12 is being rotated.
According to a preferred embodiment of the invention, the drag means comprises drag blocks 28 mounted in drag block apertures 32 in the housing 14. In the embodiment shown, the drag block apertures 32 extend around two or three sides of the slip apertures 16 and the drag block apertures 32 and the slip apertures 16 together form recaangular apertures that are elongated along the length of the housing. The drag blocks 28 each have two elongated recesses 34, one at each longitudinal end of the drag blocks 28, which house compression springs 36. Each spring 36 is compressed between a shoulder 38 of the drag blocks 28 and a stop pin 42 mounted in a radially extending aperture 44 in the housing 14. The compression of the 5 springs 36 results in the drag blocks 28 being normally urged outward of the housing 14 by the springs 36. The drag blc>cks 28 are free to move in the drag block apertures 32 independently of the motion of the slips 18 in the slip apertures 16. Preferably, as with the slips 18, the drag blocks 28 are mounted for motion tangentially in relation to the mandrel 12, parallel to the slips 18, and there is one: drag block 28 for each of the slips 18. The stop pins 42 also limit tangential (outward) motion of the drag blocks 28.
The drag blocks 28 preferably have angled shoulders on their downhole and uphole sides to facilitate passage of the drag blocks 28 past obstructions in the well bore and casing. The faces of the slips 18 that contact the casing are preferably serrated or otherwise provided with a high friction surface to assist in gripping of the ca:cing .
In the operation of the no-turn tool 10, to secure a downhole tool, such as a pump, in a well having a casing wall 46, the no-turn tool 10 is provided on the end of a well string, with the slips 18 mounted in the housing 14 for tangential motion in relation to the mandrel 12. The drag blocks 28 are biased outward by the springs 36 into engagement with the casing wall 46. With each of the springs 36 having an approximately equal degree of compression and spring constant, the drag blocks 28 will tend to center the no-turn tool 10 in the well. When the downhole tool is in its desired operational position, the mandrel 12 is rotated to drive the slips 18 tangentially outward in relation to the mandrel 12 against the drag forces supplied by the drag blocks 28, until the slips 18 engage the fixed surface of the casing wall 46. In a well that does not have casing, the slips 18 may be driven outward until contact is made with the well bore.
According to this invention, therefore, greater radial extension of the slips 18 may be obtained as compared with conventional slips.
A person skilled in the art could make immaterial modifications to the invention described in this patent document without departing from the essence of the invention that is intended to be covered by the scope of the claims that follow.
Claims (12)
1. A no-turn tool for use in a well string, the no-turn tool comprising:
a mandrel having an upper end connectable to the well string;
a housing disposed about the mandrel and having slip apertures spaced circumferentially around the housing;
plural slips mounted in the slip apertures of the housing for movement tangentially in relation to the mandrel; and a slip drive on the mandrel operatively connected to the slips for driving the slips along respective tangents to the mandrel through the respective slip apertures of the housing.
a mandrel having an upper end connectable to the well string;
a housing disposed about the mandrel and having slip apertures spaced circumferentially around the housing;
plural slips mounted in the slip apertures of the housing for movement tangentially in relation to the mandrel; and a slip drive on the mandrel operatively connected to the slips for driving the slips along respective tangents to the mandrel through the respective slip apertures of the housing.
2. The no-turn tool of claim 1 in which the slip drive is operated by rotation of the mandrel.
3. The no-turn tool of claim 2 in which the slip drive is a pinion gear and the slips include teeth that mesh with the pinion gear.
4. The no-turn tool of claim 2 further comprising drag means for holding the housing against rotation when the mandrel is being rotated.
5. The no-turn tool of claim 4 in which:
the drag means comprises drag blocks mounted in drag block apertures in the housing; and the drag blocks being urged outward of the housing by springs.
the drag means comprises drag blocks mounted in drag block apertures in the housing; and the drag blocks being urged outward of the housing by springs.
6. The no-turn tool of claim 5 in which the drag blocks are mounted for motion tangentially in relation to the mandrel.
7. The no-turn tool of claim 6 in which there is a drag block mounted parallel to each of the slips, each of the drag blocks being mounted for movement independently of the slips.
8. The no-turn tool of claim 7 in which the slip drive is operated by rotation of the mandrel.
9. The no-turn tool of claim 8 in which the slip drive is a pinion gear and the slips include teeth that mesh with the pinion gear.
10. A method of securing a downhole tool in a well, the method comprising the steps of:
providing a no-turn tool on a well string, the no-turn having slips mounted in a housing for tangential motion in relation to a mandrel mounted within the housing;
and driving the slips tangentially outward in relation to the mandrel until the slips engage a filed surface.
providing a no-turn tool on a well string, the no-turn having slips mounted in a housing for tangential motion in relation to a mandrel mounted within the housing;
and driving the slips tangentially outward in relation to the mandrel until the slips engage a filed surface.
11. The method of claim 10 further comprising the step of:
while driving the slips tangentially outward, providing drag forces on the housing.
while driving the slips tangentially outward, providing drag forces on the housing.
12. The method of claim 11 in which driving the slips tangentially outward comprises rotating a pinion gear on the mandrel, the pinion gear being meshed with teeth on the slips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2231614 CA2231614A1 (en) | 1998-03-10 | 1998-03-10 | Improved no-turn tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2231614 CA2231614A1 (en) | 1998-03-10 | 1998-03-10 | Improved no-turn tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2231614A1 true CA2231614A1 (en) | 1999-09-10 |
Family
ID=29409408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2231614 Abandoned CA2231614A1 (en) | 1998-03-10 | 1998-03-10 | Improved no-turn tool |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2231614A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7900708B2 (en) | 2008-10-24 | 2011-03-08 | Marcel Obrejanu | Multiple-block downhole anchors and anchor assemblies |
-
1998
- 1998-03-10 CA CA 2231614 patent/CA2231614A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7900708B2 (en) | 2008-10-24 | 2011-03-08 | Marcel Obrejanu | Multiple-block downhole anchors and anchor assemblies |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5333685A (en) | Wireline set and tubing retrievable packer | |
| US9279302B2 (en) | Plug counter and downhole tool | |
| US6619391B2 (en) | Combined sealing and gripping unit for retrievable packers | |
| US6695056B2 (en) | System for forming a window and drilling a sidetrack wellbore | |
| CA2376823A1 (en) | Apparatus and method for directional drilling with coiled tubing | |
| RU2594028C1 (en) | Downhole rotary locking mechanism | |
| CA2679386C (en) | Method and apparatus for forming tubular connections | |
| CA2220392C (en) | Tqr anchor | |
| US4003433A (en) | Method for cutting pipe | |
| US6073693A (en) | Downhole anchor | |
| CA2104010A1 (en) | Oil, gas or geothermal drilling apparatus | |
| RU93058191A (en) | DEVICE FOR DRILLING OIL, GAS OR GEOTHERMAL WELLS | |
| WO2004061258A3 (en) | Method of and apparatus for directional drilling | |
| AU4254800A (en) | Anti-torque tool | |
| CA2611294A1 (en) | Torque anchor and method for using same | |
| GB2410760A (en) | Downhole motor with locking mechanism to engage surface drive | |
| CA2434346A1 (en) | Retrievable packer having a positively operated support ring | |
| EP3070259B1 (en) | Cutting tool | |
| CA2247812A1 (en) | Method of removing wellhead assemblies | |
| US20020185312A1 (en) | Impact tool | |
| US10465470B2 (en) | Radially expandable ratcheting body lock ring for production packer release | |
| GB2341622A (en) | Downhole clutch assembly | |
| CA2289286A1 (en) | Tubular junction for tubing pump | |
| CA2238910C (en) | Anti-rotation tool | |
| CA2868970A1 (en) | Torque anchor for blocking the rotation of a production string of a well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |