CN202788702U - Anchor for fixing open hole staged fracturing stringstand pipe - Google Patents
Anchor for fixing open hole staged fracturing stringstand pipe Download PDFInfo
- Publication number
- CN202788702U CN202788702U CN 201220424322 CN201220424322U CN202788702U CN 202788702 U CN202788702 U CN 202788702U CN 201220424322 CN201220424322 CN 201220424322 CN 201220424322 U CN201220424322 U CN 201220424322U CN 202788702 U CN202788702 U CN 202788702U
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- China
- Prior art keywords
- central tube
- anchor
- cone
- anchor fluke
- retaining ring
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Abstract
The utility model relates to an anchor for fixing an open hole staged fracturing stringstand pipe. The anchor comprises a central tube as well as a hydraulic cylinder, a piston, a retaining ring, an anchor fluke support, an anchor fluke and a cone which are sequentially sleeved outside the central tube, wherein the upper part of the hydraulic cylinder is fixedly connected with the central tube in a sealing way to form a piston cavity, and the piston and the retaining ring are arranged in the piston cavity; oblique teeth meshed with the outer wall of the central tube are arranged on the inner wall of the retaining ring, and the anchor fluke support is in slide fit with the central tube in a sealing way; two to six axial clamping grooves are arranged in the outer periphery of the anchor fluke support, and the upper part of the anchor fluke is hinged with the clamping grooves; the lower part of the anchor fluke is provided with a cone slope matched with the upper slope of the cone, and the cone is fixedly connected with the central tube; and a liquid filling hole is arranged ion the central tube and is communicated with the piston cavity at the upper part ofabove the piston. The anchor provided by the utility model can effectively fix the stringstand pipe and prevent the stringstand pipe from shaking up and down. The packing effect of an open hole staged fracturing packer is improved. The structure is simple, the construction operation is convenient, and the reliability is high.
Description
Technical field
The utility model is a kind of fixing anchor of bore hole fracturing strings that is applicable to.
Background technology
Horizontal well has become the important channel of improving the In Oil Field Exploration And Development comprehensive benefit at present, and its technology is widely used in 13 oil fields such as CNPC Tarim Basin, the Liaohe River, Ji Dong, grand celebration, Xinjiang, Jilin.Do not reach other horizontal wells that economic development requires for boring horizontal well and the output of meeting at the low-permeability oil gas reservoir, must face the problem that volume increase is transformed.It is that the exploitation low-permeability oil deposit is effectively employed mode that the development of low-permeability oil reservoir key is to protect and improve low permeability reservoir penetrating power, horizontal well, and well cementation+perforating and fracturing and bore hole sieve tube completion are two kinds of the most frequently used completion techniques of horizontal well.The well cementation completion exists cement paste to pollute reservoir, cementing quality is difficult to the problems such as assurance, expense height; And the bore hole sieve tube completion is difficult to carry out large section acid treatment of oil formation pressure break.Therefore bore hole staged fracturing completion mode is the effective completion mode of exploitation low-permeability oil deposit.But because pressure is too large when pressure break, under the effect of pressure, tubing string can vertical tremor, and packer sealing can lose efficacy like this, and tubing string is movable under pressure during for fear of pressure break, thus needs a kind of can be when staged fracturing the fixing anchor of tubing string.
Summary of the invention
The purpose of this utility model is the problem that exists for prior art, provides a kind of for the fixing anchor of bore hole fracturing strings, and the too large tubing string vertical tremor of pressure can affect packer packing every the problem of effect during with the solution pressure break.
The utility model is achieved in that it comprises central tube and is sleeved on successively the outer fluid cylinder of central tube, piston, the retaining ring, the anchor fluke holder, anchor fluke and cone, wherein, fluid cylinder top and the central tube rear formation plunger shaft that is sealedly and fixedly connected, piston places in the plunger shaft together with the retaining ring, retaining ring inwall is provided with the helical teeth tooth meshing with the central tube outer wall, the anchor fluke holder cooperates with the central tube slipper seal, anchor fluke holder neighboring arranges 2-6 axially draw-in groove, the anchor fluke upper hinge is at draw-in groove, the anchor fluke bottom is with the cone inclined-plane that cooperates with the cone ramp, cone is fixedly connected with central tube, and central tube is provided with liquid injection hole, and the plunger shaft of liquid injection hole and piston top connects.
Such scheme also comprises: fluid cylinder top is fixed on the central tube by fluid cylinder gear cap, fixes by pin radially between retaining ring and the central tube, all adopts static seal between fluid cylinder, cone and the central tube.The upper end of central tube connects top connection, and the lower end is with external screw thread.
The utlity model has following advantage:
(1) effectively fixing tubing string prevents vertical tremor;
(2) can improve staged fracturing packer for open hole packing effect;
(3) simple in structure, construction operation is convenient, and reliability is high.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment.
Among the figure, top connection 1, central tube 2, fluid cylinder gear cap 3, fluid cylinder 4, piston 5, retaining ring 6, anchor fluke holder 7, anchor fluke 8, cone 9, lower contact 10, liquid injection hole 11, pin 12.
The specific embodiment
Now the utility model will be further described in conjunction with Figure of description.
As shown in the figure, it comprises central tube 2 and is sleeved on successively central tube outer fluid cylinder 4, piston 5, retaining ring 6, anchor fluke holder 7, anchor fluke 8, cone 9.Wherein, fluid cylinder 4 tops and central tube 2 are by the fluid cylinder gear cap 3 rear formation plunger shaft that is sealedly and fixedly connected.Piston 5 places in the plunger shaft together with retaining ring 6, and retaining ring 6 inwalls are provided with the helical teeth tooth meshing with central tube 2 outer walls.Anchor fluke holder 7 cooperates with central tube 2 slipper seals, and anchor fluke holder 2 neighborings arrange 3 axial draw-in grooves, and anchor fluke 8 upper hinges are in draw-in groove.Anchor fluke 8 bottoms are with the cone inclined-plane that cooperates with cone 9 ramps, and cone 9 is fixedly connected with central tube 2.Central tube 2 is provided with liquid injection hole 11, and liquid injection hole 11 connects with the plunger shaft of piston 5 tops.
The scheme of above-described embodiment also comprises: fix by radially-arranged two pins 12 between retaining ring 6 and the central tube 2, all adopt static seal between fluid cylinder 4, cone 9 and the central tube 2.The upper end of central tube 2 connects top connection 1, and lower end (lower contact) is with external screw thread.
The external screw thread of the internal thread of this anchor top connection 1, lower contact 10 is connected with sleeve pipe.During the operation of bore hole staged fracturing, external screw thread by top connection 1 internal thread, lower contact 10 is lowered to the sleeve pipe series winding, after being lowered into assigned address, the turn on pump pressurization, liquid enters in the hydraulic cavities by the inlet opening on the central tube 2, when reaching certain pressure, pin is sheared, hydraulic coupling pushing piston 5 and anchor fluke holder 7, and anchor fluke 8 opens, retaining ring 6 plays interception simultaneously, makes anchor fluke 8 embed the stratum and reaches the fixedly purpose of tubing string.
Claims (3)
1. one kind is used for the fixing anchor of bore hole fracturing strings, it is characterized in that: it comprises central tube and is sleeved on successively the outer fluid cylinder of central tube, piston, the retaining ring, the anchor fluke holder, anchor fluke and cone, wherein, fluid cylinder top and the central tube rear formation plunger shaft that is sealedly and fixedly connected, piston places in the plunger shaft together with the retaining ring, retaining ring inwall is provided with the helical teeth tooth meshing with the central tube outer wall, the anchor fluke holder cooperates with the central tube slipper seal, anchor fluke holder neighboring arranges 2-6 axially draw-in groove, the anchor fluke upper hinge is at draw-in groove, the anchor fluke bottom is with the cone inclined-plane that cooperates with the cone ramp, cone is fixedly connected with central tube, central tube is provided with liquid injection hole, and the plunger shaft of liquid injection hole and piston top connects.
2. as claimed in claim 1 for the fixing anchor of bore hole fracturing strings, it is characterized in that: the fluid cylinder top is fixed on the central tube by fluid cylinder gear cap, fix by pin radially between retaining ring and the central tube, all adopt static seal between fluid cylinder, cone and the central tube.
3. as claimed in claim 1 or 2 for the fixing anchor of bore hole fracturing strings, it is characterized in that: the upper end of central tube connects top connection, and the lower end is with external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220424322 CN202788702U (en) | 2012-08-26 | 2012-08-26 | Anchor for fixing open hole staged fracturing stringstand pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220424322 CN202788702U (en) | 2012-08-26 | 2012-08-26 | Anchor for fixing open hole staged fracturing stringstand pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202788702U true CN202788702U (en) | 2013-03-13 |
Family
ID=47815978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220424322 Expired - Fee Related CN202788702U (en) | 2012-08-26 | 2012-08-26 | Anchor for fixing open hole staged fracturing stringstand pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202788702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927364A (en) * | 2020-09-27 | 2020-11-13 | 东营鑫华莲石油机械有限公司 | Prestressed ground anchor and method for segmented well completion of horizontal well screen pipe by using prestressed ground anchor |
-
2012
- 2012-08-26 CN CN 201220424322 patent/CN202788702U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927364A (en) * | 2020-09-27 | 2020-11-13 | 东营鑫华莲石油机械有限公司 | Prestressed ground anchor and method for segmented well completion of horizontal well screen pipe by using prestressed ground anchor |
| CN111927364B (en) * | 2020-09-27 | 2022-05-10 | 纬达石油装备有限公司 | Prestressed ground anchor and method for segmented well completion of horizontal well screen pipe by using prestressed ground anchor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151103 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC OILFIELD SERVICE Corp. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: SHENGLI DRILLING TECHNOLOGY Research Institute OF SINOPEC |
|
| 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: 20130313 Termination date: 20210826 |