CN204920830U - Prop up variable footpath sleeve pipe centralizer of rod -type - Google Patents
Prop up variable footpath sleeve pipe centralizer of rod -type Download PDFInfo
- Publication number
- CN204920830U CN204920830U CN201520694268.XU CN201520694268U CN204920830U CN 204920830 U CN204920830 U CN 204920830U CN 201520694268 U CN201520694268 U CN 201520694268U CN 204920830 U CN204920830 U CN 204920830U
- Authority
- CN
- China
- Prior art keywords
- tube
- centralizer
- piston
- outer tube
- support bar
- 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 - Fee Related
Links
Abstract
The utility model relates to a prop up variable footpath sleeve pipe centralizer of rod -type, solid, the well completion downhole tool technical field in category oil field. This centralizer comprises center tube, top connection, outer tube, piston and bracing piece, and the top connection is installed to the threaded one end of center tube, installs the endotheca through the shear pin on the center tube of top connection one side, installs the piston through the outer tube on the center tube of endotheca one side, have a plurality of bracing pieces through a knock -off joint with pin movable mounting on the center tube of outer tube one side, the end of bracing piece is connected with outer tube and piston contact respectively. This centralizer simple structure, the reducing scope is big, has solved to have the risk of opening when current centralizer is gone into the well to and stopping mode reliability is not high, structure complicacy and the not enough problem of holding power, and specially adapted oil, gas well well cementation operation are used.
Description
Technical field
The utility model relates to a kind of strut-type radial variable casing tube centralizer, belongs to that oil field is solid, technical field of tools under completion interval of well.
Background technology
When oil, gas well cementing operation, the centralizer of sleeve pipe is very large on cementing quality impact.Casing stabbing board is connected in bunch tube, and its effect is exactly the supporting sleeve when cementing the well, and makes sleeve pipe placed in the middle in well as much as possible, to improve cementing quality.Along with oil field extensively adopting directional well, horizontal well development oil-gas Layer, the service condition of traditional rigidity, spring-backed quill centralizer exists in problems, and conventional rigid casing stabbing board external diameter is large, and can not reducing, under enter difficulty, especially high angle hole and horizontal well; Traditional elastic centralizer due to original state be just the state of meeting the eye on every side, lower fashionable flexure strip and wall friction, flexure strip is easy to wear, enters difficulty also comparatively large under horizontal well, and not enough at net horizontal section support force.At present firm in tradition, flexible centralizer basis has developed the reducing centralizer of underground hydraulic pressure open-type, this kind of centralizer original outer diameter is little, easily goes into the well, and opens rear distraction diameter large, can adapt to well expanding.But in use have deficiency: the risk having unlatching during as gone into the well, reliability is not high yet; And after opening also there is retaining mode reliability when hydraulic coupling discharges not high, and structure more complicated, support hypodynamic problem.
Summary of the invention
The purpose of this utility model is: provide structure simple, reducing scope is large, and backing stop structure reliability is high and support force is large; To solve the risk having unlatching when existing centralizer is gone into the well, and retaining mode reliability is not high, the strut-type radial variable casing tube centralizer of problem that complex structure and support force are not enough.
The technical solution of the utility model is:
A kind of strut-type radial variable casing tube centralizer, it is made up of central tube, top connection, outer tube, piston and support bar, it is characterized in that: the threaded one end of central tube is provided with top connection, the central tube of top connection side is provided with inner sleeve by shear pin, the central tube of inner sleeve side is provided with piston by outer tube; The central tube of outer tube side is movably installed with multiple support bar by strut connector and pin, and the termination of support bar is connected with outer tube and piston contact respectively.
Described outer tube is threaded with inner sleeve.
Described strut connector is threaded with central tube.
Described support bar soffit one end is inclined-plane; The support bar following table of the other end is provided with serrate slot.
Central tube between described inner sleeve and piston is provided with pressurizing port.
The beneficial effects of the utility model are:
This strut-type radial variable casing tube centralizer structure is simple, and reducing scope is large, and opened by underground hydraulic pressure in the course of work, support bar struts and plays rigid support effect to sleeve pipe, and after support bar struts, the serrate slot structure on support bar and fitting piston, realize retaining.The direct self-locking of outer tube, support bar and piston after hydraulic pressure release, the risk of opening voluntarily can be avoided, solve the risk having unlatching when existing centralizer is gone into the well, and retaining mode reliability is not high, complex structure and support hypodynamic problem, is specially adapted to oil, gas well cementing operation uses.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the schematic diagram after support bar of the present utility model struts.
In figure: 1, central tube, 2, top connection, 3, outer tube, 4, piston, 5, support bar, 6, shear pin, 7, inner sleeve, 8, strut connector, 9, pin, 10, pressurizing port, 11, serrate slot.
Detailed description of the invention
This strut-type radial variable casing tube centralizer is made up of central tube 1, top connection 2, outer tube 3, piston 4 and support bar 5.The threaded one end of central tube 1 is provided with top connection 2, and the central tube 1 of top connection 2 side is provided with inner sleeve 7 by shear pin 6, and the central tube 1 of inner sleeve 7 side is provided with piston 4 by outer tube 3; Outer tube 3 is threaded with inner sleeve 7.Central tube 1 between inner sleeve 7 and piston 4 is provided with pressurizing port 10.
The central tube 1 of outer tube 3 side is movably installed with multiple support bar 5 by strut connector 8 and pin 9, and support bar 5 soffit one end is inclined-plane; Support bar 5 following table of the other end is provided with serrate slot 11, with the coordinating of piston 4 during for working.
The strut connector 8 of this strut-type radial variable casing tube centralizer is threaded with central tube 1.The termination of support bar 5 contacts with piston 4 with outer tube 3 respectively and connects; The termination of outer tube 3 and piston 4 pairs of support bars 5 forms clamping shape, thus effectively can prevent the unlatching voluntarily (see accompanying drawing 1) of support bar 5 in a non-operative state.
Be connected with upstream sleeve pipe by top connection 2 during the work of this strut-type radial variable casing tube centralizer.In the course of work, after whole bunch tube is lowered into precalculated position, carrying out, well cementing operation (cement injection) is front, by special tool, shaft bottom is built the pressure, when cutting off shear pin 6 when hydraulic coupling reaches preset value, inner sleeve 7 drives overcoat 3 upward sliding together, thus removes the clamp position of outer tube 3 and piston 4 pairs of support bars 5 formation, meanwhile.Piston 4 slide downward under the effect of the pressure, the termination due to piston 4 is positioned at below support bar 5 termination, in the process of piston 4 slide downward, thus is progressively strutted by support bar 5, till support bar 5 termination touches the borehole wall (see accompanying drawing 2).
Because support bar 5 is circumferentially evenly arranged at central tube 1, therefore the outer support simultaneously of each support bar 5 can make casing centralization; Realize the work object of this centralizer.
After pressure release, support bar 5 is stressed gathering trend, and now on support bar 5, continuous print serrate slot 11 acts on piston 4, and the active force of support bar 5 pairs of pistons 4 only radially, in the axial direction without active force, thus realizes self-locking retaining.
This strut-type radial variable casing tube centralizer structure is simple, reducing scope is large, solve the risk having unlatching when existing centralizer is gone into the well, and retaining mode reliability is not high, complex structure and support hypodynamic problem, is specially adapted to oil, gas well cementing operation uses.
Claims (5)
1. a strut-type radial variable casing tube centralizer, it is made up of central tube (1), top connection (2), outer tube (3), piston (4) and support bar (5), it is characterized in that: the threaded one end of central tube (1) is provided with top connection (2), the central tube (1) of top connection (2) side is provided with inner sleeve (7) by shear pin (6), the central tube (1) of inner sleeve (7) side is provided with piston (4) by outer tube (3); The central tube (1) of outer tube (3) side is movably installed with multiple support bar (5) by strut connector (8) and pin (9), and the termination of support bar (5) contacts with piston (4) with outer tube (3) respectively and connects.
2. a kind of strut-type radial variable casing tube centralizer according to claim 1, is characterized in that: described outer tube (3) is threaded with inner sleeve (7).
3. a kind of strut-type radial variable casing tube centralizer according to claim 1, is characterized in that: described strut connector (8) is threaded with central tube (1).
4. a kind of strut-type radial variable casing tube centralizer according to claim 1, is characterized in that: described support bar (5) soffit one end is inclined-plane; Support bar (5) following table of the other end is provided with serrate slot (11).
5. a kind of strut-type radial variable casing tube centralizer according to claim 1, is characterized in that: the central tube (1) between described inner sleeve (7) and piston (4) is provided with pressurizing port (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520694268.XU CN204920830U (en) | 2015-09-09 | 2015-09-09 | Prop up variable footpath sleeve pipe centralizer of rod -type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520694268.XU CN204920830U (en) | 2015-09-09 | 2015-09-09 | Prop up variable footpath sleeve pipe centralizer of rod -type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204920830U true CN204920830U (en) | 2015-12-30 |
Family
ID=54969967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520694268.XU Expired - Fee Related CN204920830U (en) | 2015-09-09 | 2015-09-09 | Prop up variable footpath sleeve pipe centralizer of rod -type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204920830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012845A (en) * | 2022-08-04 | 2022-09-06 | 山东高原油气装备有限公司 | Shallow layer fast-assembling sleeve pipe |
-
2015
- 2015-09-09 CN CN201520694268.XU patent/CN204920830U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012845A (en) * | 2022-08-04 | 2022-09-06 | 山东高原油气装备有限公司 | Shallow layer fast-assembling sleeve pipe |
| CN115012845B (en) * | 2022-08-04 | 2022-11-01 | 山东高原油气装备有限公司 | Shallow layer fast-assembling sleeve pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102518419B (en) | High-efficiency fracturing combined device for multi-stage horizontal well | |
| CN110821442B (en) | Integral fishable and drillable bridge plug | |
| CN204386500U (en) | A kind of radial variable casing tube centralizer | |
| CN101205798A (en) | Mining drill rod anti-skid clamp holder | |
| CN201202418Y (en) | Self-locking type hydraulic casing tube centralizer | |
| CN204920830U (en) | Prop up variable footpath sleeve pipe centralizer of rod -type | |
| CN203066865U (en) | Anchor rod drill capable of broaching | |
| CN109209297B (en) | General scraping integrated tool | |
| CN204738801U (en) | Novel porous fracturing shower nozzle sliding sleeve device | |
| CN205778628U (en) | A kind of novel dismounting drilling rod device | |
| CN203515413U (en) | Mechanical and hydraulic dual-action ground anchor assembly | |
| CN202370464U (en) | Fixture block type releasing connector | |
| CN209494533U (en) | The drilling tool stabilizer of energy reaming while drilling | |
| CN201292785Y (en) | Center fetching inner barrel righting fittings | |
| CN201125692Y (en) | Canula hydraulic jet cutterbar | |
| CN204511327U (en) | The anti-eccentric drill bit structure of tunnel anchoring boring | |
| CN209990445U (en) | Self-centering concentric pipe following drilling tool | |
| CN202900061U (en) | Novel casing | |
| CN2916098Y (en) | Self-releasing type liner hanger | |
| CN204984263U (en) | Auto -lock slant ware is proclaimed oneself to hydraulic pressure | |
| CN204532193U (en) | A kind of expandable casing patching device | |
| CN205012958U (en) | Dabber hanger that can exchange with slips hanger | |
| CN205172462U (en) | Fluid pressure type rigidity sleeve pipe centralizer | |
| CN211230276U (en) | Connector for oil recovery of convenient dismantlement | |
| CN202266245U (en) | Uncased-hole anchoring tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20160909 |