CN203948055U - A kind of casing centralization locator - Google Patents
A kind of casing centralization locator Download PDFInfo
- Publication number
- CN203948055U CN203948055U CN201420255513.2U CN201420255513U CN203948055U CN 203948055 U CN203948055 U CN 203948055U CN 201420255513 U CN201420255513 U CN 201420255513U CN 203948055 U CN203948055 U CN 203948055U
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- CN
- China
- Prior art keywords
- wing plate
- locator
- righting
- drive unit
- hydraulic
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Abstract
The utility model discloses a kind of oil well casing locator placed in the middle, comprise sleeve body and wing plate control system, wing plate control system is made up of hydraulic locking mechanism, wing plate drive unit and righting wing plate.The utility model is provided with self-shield design, and the mode that adopts hydraulic control wing plate to open is touched wing plate drive unit by the fluid pressure effect in sleeve pipe, promotes wing plate and opens, and makes sleeve pipe in oil well, stablize, accurately locate.And the utility model is provided with slfactuating latch, in the time that cover overpressure discharges, retaining mechanism, because of pressure-acting sealing liquid passage, effectively prevents wing plate retraction, reaches lasting, stable well cementation effect.The utility model righting wing plate profile adopts radian design, the utility model and sleeve pipe are together entered in the process of well can not be obstructed, can there is not down-hole accident, and stability and the active force of the greatly raising well cementation of degree, thereby quality and the tar productivity of well cementation improved.
Description
Technical field
The utility model relates to the completion system in a kind of petroleum industry, belongs to oil exploitation downhole tool technical field, relates to specifically a kind of casing centralization locator using in petroleum oil well completion process.
Background technology
At present, oil field has entered the fine development stage, subdivision of reservoir note is adopted cementing quality that need to be higher, after oil drilling completion in cased process, need to position sleeve pipe, make sleeve pipe be positioned at the center of oil well, drilling fluid can have a strong impact on cementing quality, and drilling fluid is better, the displacement efficiency of well cementation is higher, particularly, in horizontal well and directional well, because sleeve pipe is in tilting or level, make sleeve pipe depart from the center of oil well, affect cementing quality, carrying out after perforation, a part of duct is easily stopped up by materials such as silts, affects tar productivity.
At present, oil field adopts elastic centralizer to add the rigid centralizer cross-reference of straightedge conventionally, the elastic centralizer now using and the external diameter of rigid centralizer are certain, with the diameter of open hole well quite or be greater than the diameter of open hole well, in being lowered to the process of sleeve pipe, horizontal well and directional well be easily obstructed, be lowered to difficulty, affect cementing operation and down-hole accident easily occurs.And because the uprighting force of elastic centralizer is too little, water caltrop diameter and the area of rigid centralizer are little, so both righting effects are poor.Casing string can, because of the bending of deadweight and well, can be pressed close to a side borehole wall, has affected the replacement environment of cement and mud, can not realize the replacement effect of dull and stereotyped stream, has affected cementing quality.
Summary of the invention
Problem to be solved in the utility model, is for above problem, provides a kind of being lowered at sleeve pipe down-hole accident can not occur in process, good righting effect is accurately located, had to sleeve pipe, improves the casing centralization locator of cementing quality and tar productivity.
For addressing the above problem, the technical scheme that the utility model uses is:
A kind of casing centralization locator, is characterized in that, comprise sleeve body and wing plate control system, described sleeve body one end is provided with internal thread, the other end is provided with external screw thread; Described wing plate control system comprises hydraulic locking mechanism, wing plate drive unit and righting wing plate, between hydraulic locking mechanism and wing plate drive unit, is provided with fluid passage; Described wing plate control system is inlaid in sleeve body outside, between wing plate control system and sleeve body inner chamber, is provided with radial direction through hole; Between described righting wing plate and wing plate drive unit, be connected by screw.
As the preferred scheme of one, described hydraulic locking mechanism comprises hydraulic control valve, hydraulic control valve pocket, feed pathway and back flow channel; Described radial direction through hole is arranged between hydraulic control valve pocket and sleeve body; Described feed pathway and back flow channel are connected by fluid passage respectively and between wing plate drive unit.
A scheme for concrete optimization, described hydraulic control valve is replaceable.
As the preferred scheme of one, described wing plate drive unit comprises hydraulic piston and hydraulic piston; Between described hydraulic piston and fluid passage, be provided with radial center through hole; On described hydraulic piston, be provided with the screw being connected with righting wing plate.
A scheme for concrete optimization, the hydraulic piston being connected with each righting wing plate in described wing plate drive unit is no less than 2.
As the preferred scheme of one, described wing plate control system arranged outside has righting wing plate seat.
A scheme for concrete optimization, described righting wing plate is recovered in righting wing plate seat, and the pressure being subject to by hydraulic piston promotes righting wing plate and outwards opens.
A scheme for concrete optimization, described righting wing plate is the strip rigid structures of outside for arc, its outside radian is the same with the outside radian of sleeve body.
A scheme for concrete optimization, described hydraulic locking mechanism is no less than 1.
A scheme for concrete optimization, described wing plate drive unit is identical with righting wing plate quantity, is 4-6.
The utility model is taked above technical scheme, has advantages of following:
The utlity model has the connector identical with casing string, and identical with sleeve pipe external diameter, can be connected to any of casing string needs in a part of lower going-into-well of position as casing string, and moderate length, and joint connection in site is convenient.
The utility model is provided with self-shield design; the mode that adopts hydraulic control wing plate to open; after sleeve pipe is divided into; exert pressure to the utility model by ground pressure device again; under pressure; hydraulic control valve in hydraulic locking mechanism is pushed open; high-pressure slurry flows in the utility model fluid passage; trigger wing plate drive unit; promoting wing plate outwards opens; the problem of having avoided occurring locator generation premature inflation placed in the middle in sleeve pipe enters the process of well, makes the utility model before cementing the well, can be freely movable in well.
The utlity model has hydraulic locking mechanism, in the time that cover overpressure discharges, wing plate is subject to the pressure differential producing from the reaction force of the outer borehole wall of sleeve pipe and this locator placed in the middle inside and sleeve body, hydraulic control valve in hydraulic locking mechanism cuts out rapidly, and the control wing plate of having opened can not bounce back because of the fluid pressure effect in locator placed in the middle.Reach lasting, stable well cementation effect.
In the utility model, righting wing plate is set to the strip rigid structures of outside for arc, and its outside radian is the same with the outside radian of sleeve body.Therefore, in the process that together enters well with sleeve pipe, can not be obstructed, down-hole accident can not occur; And the way of contact of employing face and face between wing plate and the borehole wall, greatly stability and the active force of the raising of degree well cementation, thus improve quality and the tar productivity of well cementation.
Below in conjunction with drawings and Examples, the utility model is further described.
brief description of the drawings
Fig. 1 be in the utility model embodiment a kind of casing centralization locator partly cut open figure.
In figure, 1-sleeve body, 2-wing plate control system, 3-hydraulic locking mechanism, 4-wing plate drive unit, 5-righting wing plate, 6-hydraulic control valve, 7-hydraulic control valve pocket, 8-radial direction through hole, 9-radial center through hole, 10-fluid passage, 11-feed pathway, 12-back flow channel, 13-hydraulic piston, 14-hydraulic piston.
detailed description of the invention
As shown in Figure 1, a kind of casing centralization locator of the utility model partly cut open figure.Comprise sleeve body 1 and wing plate control system 2, described sleeve body 1 one end is provided with internal thread, the other end is provided with external screw thread; Described wing plate control system 2 comprises hydraulic locking mechanism 3, wing plate drive unit 4 and righting wing plate 5, between hydraulic locking apparatus 3 and wing plate drive unit 4, is provided with fluid passage 10; Described wing plate control system 2 is inlaid in sleeve body 1 outside, between wing plate control system 2 and sleeve body 1 inner chamber, is provided with radial direction through hole 8; Between described righting wing plate 5 and wing plate drive unit 4, be connected by screw.
Described hydraulic locking mechanism 3 comprises hydraulic control valve 6, hydraulic control valve pocket 7, feed pathway 11 and back flow channel 12; Described radial direction through hole 8 is arranged between hydraulic control valve pocket 7 and sleeve body 1; Described feed pathway 11 and back flow channel 12 are connected by fluid passage 10 respectively and between wing plate drive unit 4.
Described hydraulic control valve has locking function.
Described hydraulic control valve 6 is replaceable.
Described wing plate drive unit 4 comprises hydraulic piston 13 and hydraulic piston 14; Between described hydraulic piston 14 and fluid passage 10, be provided with radial center through hole 9; On described hydraulic piston 13, be provided with the screw being connected with righting wing plate 5.
The hydraulic piston 13 being connected with each righting wing plate in described wing plate drive unit 4 is no less than 2.
Described wing plate control system 2 arranged outside have righting wing plate seat.
Described righting wing plate 5 is recovered in righting wing plate seat, and the pressure being subject to by hydraulic piston 13 promotes righting wing plate 5 and outwards opens.
The strip rigid structures that described righting wing plate 5 is arc for outside, its outside radian is the same with the outside radian of sleeve body 1.
Described hydraulic locking mechanism 3 is no less than 1.
Described wing plate drive unit 4 is identical with righting wing plate 5 quantity, is 4-6.
The utility model two ends are connected with casing string, together lower in well with casing string.After sleeve pipe is divided into, match with down-hole pressure device by ground pressure device again, exert pressure to the utility model, under pressure, sleeve pipe inner high voltage mud is pushed hydraulic control valve 6 open by radial direction through hole 8 and is entered in hydraulic control valve pocket 7, enter in fluid passage 10 by feed pathway 11 afterwards, then by wing plate drive unit radially central through hole 9 enter in hydraulic piston 14, promote hydraulic piston 13, righting wing plate 5 is paid.Ground pressure device continues supercharging, the force value that slowly raises 10MPa, 12MPa, 16MPa, 181MPa, the force value that finally raises 20MPa, each pressure step voltage stabilizing 2min, fully outwards opens to ensure that righting wing plate 5 is under pressure, and fully contacts with face form with borehole wall face.In the time that pressure is raised to 20 ~ 22Mpa, by coordinating of down-hole pressure device and ground pressure device, abrupt release pressure, re-establishes mud circulation.The utility model inner high voltage mud and the instantaneous mineralization pressure of the interior mud of sleeve body 1 are poor, the utility model inner high voltage mud enters in hydraulic control valve pocket 7 by back flow channel 12, promote hydraulic control valve 6, the radial direction through hole 8 being connected between the utility model and sleeve body 1 is closed, and high-pressure slurry is closed in the utility model.Righting wing plate 5 continues in open mode, can not bounce back, and matches with the borehole wall of oil well, and sleeve pipe is positioned, and makes sleeve pipe be positioned at the center position of oil well, reaches lasting, stable well cementation effect, cementing quality and tar productivity.
The foregoing is only preferred embodiment of the present utility model, non-in order to limit the scope of the claims of the present utility model, other uses the equivalence of patent spirit of the present utility model to change, and all should belong to the scope of the claims of the present utility model.
Claims (10)
1. a casing centralization locator, is characterized in that, comprises sleeve body and wing plate control system, and described sleeve body one end is provided with internal thread, the other end is provided with external screw thread; Described wing plate control system comprises hydraulic locking mechanism, wing plate drive unit and righting wing plate, between hydraulic locking mechanism and wing plate drive unit, is provided with fluid passage; Described wing plate control system is inlaid in sleeve body outside, between wing plate control system and sleeve body inner chamber, is provided with radial direction through hole; Between described righting wing plate and wing plate drive unit, be connected by screw.
2. a kind of casing centralization locator as claimed in claim 1, is characterized in that, described hydraulic locking mechanism comprises hydraulic control valve, hydraulic control valve pocket, feed pathway and back flow channel; Described radial direction through hole is arranged between hydraulic control valve pocket and sleeve body; Described feed pathway and back flow channel are connected by fluid passage respectively and between wing plate drive unit.
3. a kind of casing centralization locator as claimed in claim 2, is characterized in that, described hydraulic control valve is replaceable.
4. a kind of casing centralization locator as claimed in claim 1, is characterized in that, described wing plate drive unit comprises hydraulic piston and hydraulic piston; Between described hydraulic piston and fluid passage, be provided with radial center through hole; On described hydraulic piston, be provided with the screw being connected with righting wing plate.
5. a kind of casing centralization locator as claimed in claim 4, is characterized in that, the hydraulic piston being connected with each righting wing plate in described wing plate drive unit is no less than 2.
6. a kind of casing centralization locator as claimed in claim 1, is characterized in that, described wing plate control system arranged outside has righting wing plate seat.
7. a kind of casing centralization locator as claimed in claim 6, is characterized in that, described righting wing plate is recovered in righting wing plate seat, and the pressure being subject to by hydraulic piston promotes righting wing plate and outwards opens.
8. a kind of casing centralization locator as described in claim as arbitrary in claim 1 ~ 7, is characterized in that, described righting wing plate is the strip rigid structures of outside for arc, and its outside radian is the same with the outside radian of sleeve body.
9. a kind of casing centralization locator as described in claim as arbitrary in claim 1-7, is characterized in that, described hydraulic locking mechanism is no less than 1.
10. a kind of casing centralization locator as described in claim as arbitrary in claim 1-7, is characterized in that, described wing plate drive unit is identical with righting wing plate quantity, is 4-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255513.2U CN203948055U (en) | 2014-05-20 | 2014-05-20 | A kind of casing centralization locator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255513.2U CN203948055U (en) | 2014-05-20 | 2014-05-20 | A kind of casing centralization locator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203948055U true CN203948055U (en) | 2014-11-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420255513.2U Expired - Fee Related CN203948055U (en) | 2014-05-20 | 2014-05-20 | A kind of casing centralization locator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203948055U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033115A (en) * | 2014-05-20 | 2014-09-10 | 廊坊市志宏协佳石油技术有限公司 | Casing pipe centered locator and working method thereof |
| CN114541984A (en) * | 2022-03-10 | 2022-05-27 | 中国石油大学(北京) | Rubber expandable casing centralizer for horizontal well |
-
2014
- 2014-05-20 CN CN201420255513.2U patent/CN203948055U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033115A (en) * | 2014-05-20 | 2014-09-10 | 廊坊市志宏协佳石油技术有限公司 | Casing pipe centered locator and working method thereof |
| CN104033115B (en) * | 2014-05-20 | 2019-11-29 | 廊坊市志宏协佳石油技术有限公司 | A kind of casing centralization locator and its working method |
| CN114541984A (en) * | 2022-03-10 | 2022-05-27 | 中国石油大学(北京) | Rubber expandable casing centralizer for horizontal well |
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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 |
Granted publication date: 20141119 Termination date: 20150520 |
|
| EXPY | Termination of patent right or utility model |