CN2693935Y - Roller type centralizer - Google Patents
Roller type centralizer Download PDFInfo
- Publication number
- CN2693935Y CN2693935Y CN 03242545 CN03242545U CN2693935Y CN 2693935 Y CN2693935 Y CN 2693935Y CN 03242545 CN03242545 CN 03242545 CN 03242545 U CN03242545 U CN 03242545U CN 2693935 Y CN2693935 Y CN 2693935Y
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- CN
- China
- Prior art keywords
- centralizer
- roller
- casing
- type
- roller type
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- Expired - Lifetime
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Abstract
The utility model relates to a roller type centralizer applied to the operation of well drilling and well completion in oil exploration. In the course of well completion for a directional well, a regular rigid casing centralizer which is greatly affected by the lateral force of hole inclination has no action of reducing frictional resistance. The utility model relates to the roller type casing centralizer is provided with a slot on a centralizing block, and a set of rollers is arranged in the slot through a pin shaft; therefore, the sliding frictional resistance of the roller type casing centralizer can be changed to rolling frictional resistance in the operation of running a casing. The roller type centralizer has the advantages of effectively reducing the frictional resistance in running the casing, guaranteeing well cementing quality, clearing mud cakes on a well wall and improving the displacing efficiency of cement paste; in addition, a laevorotary spiral groove which has self-cleaning action can change the resistance stressed state of a casing string and can guarantee the casing to successfully run.
Description
Technical field
The utility model relates to the working casing stabbing board of a kind of oil exploration drilling completion, is the completion practice instrument that adopts in a kind of petroleum drilling engineering.
Background technology
The rigid casing centralizer that oilfield well completion construction is at present generally adopted, its wiper block is generally straightedge type or screw type, such centralizer mainly is made of centralizer body 5 and straightedge type or the screw type wiper block 1 given prominence on body, and there is tangible technological deficiency in this class centralizer in some exceptional well completion work progresss.As in directional well completion process, it is bigger that casing string is influenced by the lateral force of hole deviation, and straightedge rigid casing centralizer or spiral rigid casing centralizer can not play the effect that reduces frictional resistance, increase Frictional Drag of Casing Running on the contrary; Also can increase contacting of sleeve pipe and the borehole wall in the bore hole well, can not reduce the frictional resistance of the sleeve pipe and the borehole wall; Straightedge rigid casing centralizer and spiral rigid casing centralizer can't use in sleeve pipe, have increased the frictional resistance of sleeve pipe and upper strata internal surface of sleeve pipe.
In order to overcome above-mentioned defective, the frictional resistance when reducing setting of casing the utility model proposes following solution.
Summary of the invention
On the straightedge type wiper block 1 of above-mentioned straightedge type rigid casing centralizer or spiral rigid casing centralizer screw type wiper block 1, slot 6, and pass through bearing pin 2 one group of roller 3 is installed in groove, roller protrudes from wiper block 1 surface, the height that protrudes satisfies the requirement of run through casing size, centralizer can be fixed on the sleeve pipe by dog screw 4, when setting of casing was constructed, the sliding friction when making setting of casing became the rolling frictional resistance.
Technique scheme can be expressed as: a kind of roller type centralizer is made of the body 5 of centralizer and the wiper block 1 on the body, it is characterized in that having on the wiper block groove 6, by bearing pin 2 one group of roller 3 is installed in the groove 6, roller protrudes from wiper block 1 surface.
The groove of roller type centralizer can be the straightedge type, also can be screw type.
One group of roller all is installed in each groove, and every group of roller can have 2-8 or more.Roller can be column type, ball-type or goalpost type.The roller bearing pin should be vertical with the side line of groove or be bordering on vertical.
Spiral type groove can be a left-hand screw, and it is 65 ° that spiral angle can be designed to 15 ° of-85 ° of spiral angles
Description of drawings
Fig. 1 is a straightedge type roller type centralizer side diagrammatic sketch, and 1 is wiper block among the figure, and 2 is bearing pin, and 3 is roller, and 4 is dog screw, and 6 is groove.
Fig. 2 is the vertical view of roller type centralizer, and 1 is wiper block among the figure, and 2 is bearing pin, and 3 is roller, and 5 is centralizer body, and 6 is groove.
Fig. 3 is a screw type roller type centralizer side diagrammatic sketch, and 1 is wiper block among the figure, and 2 is bearing pin, and 3 is roller, and 4 is dog screw, and 6 is groove.
Fig. 4 be among Fig. 3 A to local expanded view, d is a spiral angle, 1 is wiper block among the figure, 2 is bearing pin, 3 is roller, 4 is dog screw, 6 is groove.
Fig. 5 is the lateral plan of screw type rolling wheel centralizer, and 1 is wiper block among the figure, and 2 is bearing pin, and 3 is roller, and 4 is dog screw, and 6 is groove.
The specific embodiment
The utility model has carried out the application performance test in the job site, oil field, on completion tubular column basis reasonable in design, selects to place the position of this type of sleeve pipe rolling wheel centralizer.
Embodiment:
Φ 139.7mm spiral roller centralizer in the test is made of the wiper block 1 on the body 5 of centralizer and six bodies, has groove 6 on each wiper block, by bearing pin 2 one group of roller 3 is installed in the groove 6, and roller protrudes from wiper block 1 surface; This roller type centralizer groove is type in the shape of a spiral, and one group of roller all is installed in the groove, 3 on every group of roller; The roller bearing pin is vertical with the side line of groove; Roller is column type; Spiral type groove is a left-hand screw, and spiral angle is 65 °
Evidence: use above-mentioned rollers formula centralizer, can effectively reduce Frictional Drag of Casing Running power, the bonding quality at first, second interface that guaranteed simultaneously to cement the well in the position that places rolling wheel centralizer; Adopt the spiral roller centralizer can change the effect that wall cake is washed away in the flow field, remove wall cake, improve displacement efficiency of cement slurry; Because casing string has added the spiral roller centralizer, makes left-handed helicla flute have the effect of self-cleaning, left-handed helicla flute can change the stress that casing string is hampered simultaneously, guarantees that sleeve pipe is lowered to smoothly.In addition, be used elastic centralizer in the test well cementation, the casing centralization degree is reached more than 80%.
Claims (8)
1, a kind of roller type centralizer, constitute by the body (5) of centralizer, wiper block (1) on the body and dog screw (4), it is characterized in that having on the wiper block groove (6), by bearing pin (2) one group of roller (3) is installed in the groove (6), roller (3) protrudes from wiper block (1) surface.
2, roller type casing stabbing board as claimed in claim 1 is characterized in that roller can be column type, ball-type or goalpost type.
3, roller type centralizer as claimed in claim 1 is characterized in that roller bearing pin (2) should be vertical with the side line of groove (6) or be bordering on vertical.
4, roller type centralizer as claimed in claim 1 is characterized in that groove (6) is the straightedge type.
5, roller type centralizer as claimed in claim 1 is characterized in that groove (6) is screw type.
6, as claim 4 or 5 described roller type centralizers, it is characterized in that one group of roller all is installed in each groove (6), every group of roller can have more than one.
7, roller type centralizer as claimed in claim 5, it is characterized by groove (6) is left-hand screw, the spiral angle scope is 15 °-85 °
8, roller type centralizer as claimed in claim 5, it is characterized by groove (6) spiral angle is 65 °
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242545 CN2693935Y (en) | 2003-03-26 | 2003-03-26 | Roller type centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242545 CN2693935Y (en) | 2003-03-26 | 2003-03-26 | Roller type centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2693935Y true CN2693935Y (en) | 2005-04-20 |
Family
ID=34755263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03242545 Expired - Lifetime CN2693935Y (en) | 2003-03-26 | 2003-03-26 | Roller type centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2693935Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635316A (en) * | 2012-05-09 | 2012-08-15 | 常熟市石油固井工具有限公司 | Rigid spiral idler centralizer |
| CN103032032A (en) * | 2012-12-31 | 2013-04-10 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Helical rigid roller resin centralizer for casings |
| CN104790882A (en) * | 2015-04-09 | 2015-07-22 | 扬州市驰城石油机械有限公司 | Sliding hole wringing machine |
| CN107255018A (en) * | 2017-07-11 | 2017-10-17 | 深圳市远东石油钻采工程有限公司 | A kind of non-rotation centralizer of variable-diameter roller type |
-
2003
- 2003-03-26 CN CN 03242545 patent/CN2693935Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635316A (en) * | 2012-05-09 | 2012-08-15 | 常熟市石油固井工具有限公司 | Rigid spiral idler centralizer |
| CN103032032A (en) * | 2012-12-31 | 2013-04-10 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Helical rigid roller resin centralizer for casings |
| CN104790882A (en) * | 2015-04-09 | 2015-07-22 | 扬州市驰城石油机械有限公司 | Sliding hole wringing machine |
| CN107255018A (en) * | 2017-07-11 | 2017-10-17 | 深圳市远东石油钻采工程有限公司 | A kind of non-rotation centralizer of variable-diameter roller type |
| CN107255018B (en) * | 2017-07-11 | 2023-06-06 | 深圳市远东石油钻采工程有限公司 | Variable diameter roller type non-rotating centralizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130326 Granted publication date: 20050420 |