CN203847051U - Open hole packer - Google Patents
Open hole packer Download PDFInfo
- Publication number
- CN203847051U CN203847051U CN201420171189.6U CN201420171189U CN203847051U CN 203847051 U CN203847051 U CN 203847051U CN 201420171189 U CN201420171189 U CN 201420171189U CN 203847051 U CN203847051 U CN 203847051U
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- CN
- China
- Prior art keywords
- cylinder body
- open hole
- central tube
- hole packer
- piston
- 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.)
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Abstract
The utility model discloses an open hole packer. The open hole packer comprises a central pipe and a first power transmission assembly located on the axial rear side of a setting mechanism, wherein a connector and a setting mechanism are sequentially arranged on the central pipe in the axial direction of the central pipe from front to rear in a sleeved mode. The open hole packer further comprises a centralizing device arranged between the setting mechanism and the first power transmission assembly and sleeving the central pipe, and a second power transmission assembly arranged on the axial rear side of the first power transmission assembly, wherein retaining locking mechanisms are respectively arranged on the setting mechanism and the second power transmission assembly. The centralizing device comprises a centralizing block arranged on the central pipe in a floating mode and a centralizing sleeve for clamping the centralizing block in the centralizing sleeve, wherein an elastic element is arranged between the inner hole wall of the centralizing sleeve and a groove of the centralizing block. The centralizing device plays the supporting effect on the set packer, so that the set packer is not subjected to unnecessary de-setting.
Description
Technical field
The utility model has related to a kind of oil exploration equipment, particularly a kind of open hole packer for horizontal well multistage pressure break.
Background technology
Low permeability oil field often has the features such as low, the low reserves abundance of Oil Layer Reservoir permeability, single well productivity be low.The general horizontal well that adopts is exploited low permeability oil field at present.Utilizing before horizontal well exploits, generally producing several separate cracks by the mode of staged fracturing comes conducting oil reservoir and horizontal well pit shaft, thereby finally reaches the object that improves output.
When staged fracturing of horizontal well, the equipment adopting is open hole packer.The horizontal bare hole section of the operating position of open hole packer in horizontal well, the quality of its fracturing effect depend on position that open hole packer sets in horizontal well and and the borehole wall between set effect (sealing effectiveness).Because shaft bottom situation complexity, strata pressure are high, under the effect of and friction irregular at the borehole wall, than being easier to cause the packing element of packer and the borehole wall to set the bad or premature setting of effect, affect the pressing crack construction in later stage.
Utility model content
In order to overcome the above-mentioned defect of prior art, technical problem to be solved in the utility model has been to provide a kind of open hole packer, and it can improve the setting property of open hole packer in pit shaft.
Concrete technical scheme of the present utility model is:
A kind of open hole packer, described open hole packer comprises central tube, axially be set in successively from front to back the joint on described central tube along described central tube, setting mechanism, be positioned at the first power transfer assembly of the axial rear side of described setting mechanism, it is characterized in that: described open hole packer also comprises and is arranged between described setting mechanism and described the first power transfer assembly and is set in the erection device outside described central tube, be arranged on the axial rear side of described the first power transfer assembly the second power transfer assembly, on described setting mechanism and described the second power transfer assembly, be respectively arranged with retaining retaining mechanism.
Preferably, described erection device comprise float be located at wiper block on described central tube, by described wiper block card supporting positive cover therein, between the inner hole wall of described supporting positive cover and the groove of described wiper block, be provided with flexible member.
Preferably, the two ends of described supporting positive cover are bowl-shape, and the two ends of described supporting positive cover are respectively arranged with the first cone and the second cone with the corresponding coupling of its shape.
Preferably, described wiper block is fixedly connected with described the first cone and described the second cone respectively by the first shear pin, and after described the first shear pin fracture, described wiper block can be along the radial floating of described central tube.
Preferably, described supporting positive cover upwards evenly offers endoporus along its week, and in described each endoporus, all correspondence is provided with a wiper block.
Preferably, described the first Power Component comprises the first cylinder body being fixedly connected with described central tube, can slide axially and be set in the first piston outside described the first cylinder body along described central tube, between described the first cylinder body and described first piston, form the first annular space, on described central tube, offer the first through hole being connected with described the first annular space, described the second power transfer assembly comprises the second cylinder body being fixedly connected with described the first cylinder body, the second piston being fixedly connected with described first piston, between described the second cylinder body and described the second piston, form the second annular space, on described the first cylinder body, offer the second through hole being connected with described the second annular space.
Preferably, described the second piston bush is located at outside described the second cylinder body and is fixedly connected by the second shear pin and described the second cylinder body, and after described the second shear pin fracture, described the second piston can slide axially along described the second cylinder body.
Preferably, be arranged on retaining retaining mechanism on described the second power transfer assembly and comprise the first lock ring that is arranged in the annular gap that described the second piston and described the second cylinder body form, described the first lock ring is formed with the first corresponding stop portion with on described the second cylinder body.
Preferably, be arranged on retaining retaining mechanism on described setting mechanism and comprise the second lock ring that is positioned at the axial rear side of described setting mechanism, described the second lock ring with on described central tube, be formed with the second corresponding stop portion.
The utility model adopts above structure, has the following advantages:
1, erection device is played a supporting role after setting to packer, makes packer after setting, can not produce unnecessary deblocking;
2, under the booster action of the first lock ring and/or the second lock ring, packer is after formation sets, and lock ring has played restriction to packing element and power transfer assembly and made packing element and power transfer assembly be difficult for producing to reset, improve the effect that sets of packer;
3,, compared to adopting single cylinder body and piston, can adopt many group power transfer assemblies to improve setting force.
Brief description of the drawings
Accompanying drawing described here is only for task of explanation, and is not intended to limit by any way the utility model scope of disclosure.In addition, shape and the proportional sizes etc. of the each parts in figure is only schematically, for helping understanding of the present utility model, is not shape and the proportional sizes that specifically limits the each parts of the utility model.Those skilled in the art, under instruction of the present utility model, can select various possible shapes and proportional sizes to implement the utility model as the case may be.
Fig. 1 has shown the structural representation of the first embodiment of open hole packer in the utility model.
The Reference numeral of above accompanying drawing: 1, joint; 2, central tube; 3, setting mechanism; 31, back band; 32, packing element; 33, glue tube base; 4, the second lock ring; 5, the first power transfer assembly; 51, the first cylinder body; 52, first piston; 53, the first annular space; 54, the first through hole; 6, erection device; 61, supporting positive cover; 62, flexible member; 63, wiper block; 64, the first cone; 65, the second cone; 66, endoporus; 7, the second power transfer assembly; 71, the second cylinder body; 72, the second piston; 73, the second annular space; 74, the second through hole; 8, the first lock ring; 9, the second shear pin; 10, the first shear pin.
Detailed description of the invention
With the description of the utility model detailed description of the invention, can more be well understood to details of the present utility model by reference to the accompanying drawings.But detailed description of the invention of the present utility model described here,, for explaining the purpose of this utility model, is only to restriction of the present utility model and can not be understood as by any way.Under instruction of the present utility model, technician can conceive based on possible distortion arbitrarily of the present utility model, and these all should be regarded as belonging to scope of the present utility model.
Please refer to Fig. 1, the utility model discloses open hole packer, open hole packer comprises central tube 2, joint 1, setting mechanism 3, the first power transfer assembly 5, erection device 6, the second power transfer assembly 7, retaining retaining mechanism.
Central tube 2 is the cylinder of hollow substantially.Central tube 2 can be along this cylindrical extending axially.Joint 1 and setting mechanism 3 are set on central tube 2 successively along (in figure direction) from left to right axially from front to back of described central tube 2.Joint 1 is set in the left part of central tube 2, and joint 1 is fixedly connected by the modes such as screw thread and central tube 2.The left part of joint 1 can be connected with oil pipe.In the present embodiment, setting mechanism 3 comprises the packing element 32 being set in outside described central tube, is set in the back band 31 on described packing element.The left part of packing element 32 and joint 1 are inconsistent, and the right part of packing element 32 and erection device 6 are inconsistent.In the time being compressed power, packing element 32 can occur that length diminishes and external diameter becomes large deformation until packing element 31 forms sealing to the borehole wall, and now this packer is in setting state.In the time that needs carry out deblocking to this packer, can there is length and become deformation large and that external diameter diminishes until packing element 32 no longer forms sealing to the borehole wall in packing element 32.Erection device 6 is between setting mechanism 3 and the first power transfer assembly 5.Erection device 6 is fitted to stratum after having set at setting mechanism 3, guarantees can not produce unnecessary deblocking after open hole packer is setting, and then improves the performance that sets of open hole packer.The first power transfer assembly 5 and the second power transfer assembly 7 impose thrust forward (to the left side in figure) to erection device 6 jointly, to compress packing element 32.Compared to the packer that is only provided with a power transfer assembly, it is larger that what the packer in the utility model produced in the time setting set thrust.In the time that thrust becomes large, the distortion of packing element 32 is inevitable more thoroughly be difficult for deblocking, thereby open hole packer in the utility model is more conducive to set.Retaining retaining mechanism is separately positioned on setting mechanism 3 and the second power transfer assembly 7, for limit respectively setting mechanism 3 and the second power transfer assembly 7 after having set to rear reset (to figure right side).
Further, erection device 6 comprises floating and is located at wiper block 63 on described central tube 2, described wiper block 63 is blocked to supporting positive cover 61 therein, between the groove of the inner hole wall of described supporting positive cover 61 and described wiper block 63, be provided with flexible member 62, flexible member 62 can be device or the element that spring etc. has Flexible Reset.Supporting positive cover 61 is cylinder substantially, and the two ends of supporting positive cover 61 are bowl-shape to self inner recess, and the two ends of described supporting positive cover 61 are respectively arranged with the first cone 64 and the second cone 65 with the corresponding coupling of its shape.The left end inwall of the right-hand member of the first cone 64 and supporting positive cover 61 matches, the taper that all becomes to diminish gradually from left to right.The left end of the first cone 64 and setting mechanism 3 are inconsistent.The right-hand member inwall of the left end of the second cone 65 and supporting positive cover 61 matches, and is all and becomes gradually from left to right large taper.Wiper block 62 can be fixedly connected with described the first cone 64 and described the second cone 65 respectively by the first shear pin 10, and after described the first shear pin 10 fractures, described wiper block 63 can be along the radial floating of described central tube 2.In the time of original state, flexible member 62 is in compressive state.When the first power transfer assembly 5 and the second power transfer assembly 7 continue erection device 6 and setting mechanism 3 to impose active force forward with compression packing element 32, in the time that packing element 32 is compressed to the limit, the first power transfer assembly 5 and the second power transfer assembly 7 continue to give erection device 6 one active force forward, after this active force is greater than the maximum shear stress that the first shear pin 10 can bear and the first shear pin 10 is cut off, flexible member 62 is released, and wiper block 63 is released until prop up stratum from the inner hole wall of supporting positive cover 61 by flexible member 62.Now wiper block 63 is inconsistent stable to guarantee setting of open hole packer with the borehole wall.In order to make packer, at himself, week upwards stressed evenly described supporting positive cover 61 upwards evenly offers endoporus 66 along its week, and the interior equal correspondence of each endoporus 66 is provided with a wiper block 63 to packer being produced along circumferentially symmetrical detent force of central tube 2.
Further, the first power transfer assembly 5 imposes compressive force for the packing element 32 by setting mechanism 3 and makes packer reach the state of setting.The first power transfer assembly 5 comprises the first cylinder body 51 of being fixedly installed on central tube 2, it is outer and can be along the first piston in axial sliding 52 of the first cylinder body 51 to be set in the first cylinder body 51, between described the first cylinder body 51 and described first piston 52, form the first annular space 53, on described central tube 2, offer the first through hole 54 being connected with described the first annular space 53.The left part of the first cylinder body 51 and central tube 2 are fixedly connected by other feasible patterns such as screw threads.The left part of first piston 52 and erection device 6 are inconsistent.
After the second power transfer assembly 7 is positioned at the first power transfer assembly 5, the second power transfer assembly 7 is for providing thrust to the first power transfer assembly 5.The second power transfer assembly 7 comprises the second cylinder body 71 being fixedly connected with the first cylinder body 51, the second piston 72 being fixedly connected by the second shear pin 9 and the second cylinder body 71, between described the second cylinder body 71 and described the second piston 72, form the second annular space 73, on described the first cylinder body 51, offer the second through hole 74 being connected with described the second annular space 73.After described the second shear pin 9 fractures, described the second piston 72 can slide along described the second cylinder body 71.The right part of the left part of the second cylinder body 71 and the first cylinder body 51 can be fixedly connected by fixed forms such as screw threads.The second piston 72 is set in outside the second cylinder body 71, and the left part of the second piston 72 and first piston 52 are fixedly connected.While suppressing in to central tube 2, the second shear pin 9 ruptures in the situation of being under pressure, and what the second piston 72 can be along the second cylinder body 71 is axially axially sliding left of central tube 2.
After the pitching of the rear end of packer (i.e. right positions in figure), while suppressing in to central tube 2, pressurized fluid from the first through hole 54 enter the first annular space 53, the second through hole 74 enters in the second annular space 73, and give first piston 52 and the second piston 72 thrust in (to the left side in figure) forward, when this thrust be greater than the second shear pin 9 bear limiting value time, the second shear pin 9 ruptures.When after the second shear pin 9 fracture, first piston 52 and the second piston 72 give erection device 6 thrust in (to the left side in figure) forward jointly, and then the packing element 32 of setting mechanism 3 is produced to compression.Obvious, adopt the active force of two groups of power transfer assemblies must be greater than the situation that is only provided with a power transfer assembly.
Further, be arranged on retaining retaining mechanism on described the second power transfer assembly 7 and comprise the first lock ring 8 that is arranged in the annular gap that described the second piston 72 and described the second cylinder body 71 form, described the first lock ring 8 is formed with the first corresponding stop portion with on described the second cylinder body 71.The first stop portion comprises the first tooth-shape structure on formation the first lock ring 8 and is formed at the second tooth-shape structure on the second cylinder body 71.The first stop portion makes the first lock ring 8 can only be along (to the left side in figure) axially forward motion of described the second cylinder body 71, and can not move backward.Therefore the first lock ring 8 produces restriction to the second power transfer assembly 7 after having set, motion that limiting the second piston 72 can not be backward (to the right side in figure), and then prevented packing element 32 deblocking under improper situation.
Be arranged on retaining retaining mechanism on described setting mechanism 3 and comprise the second lock ring 4 that is arranged in the axial rear side of described setting mechanism 3 (to figure right side), described the second lock ring 4 is formed with the second corresponding stop portion with on described central tube 2.The second stop portion comprises the 3rd tooth-shape structure on formation the second lock ring 4 and is formed at the 4th tooth-shape structure on central tube 2.The second stop portion make the second lock ring 4 can only be forward (to the left side in figure) motion, and can not be backward (to the right side in figure) motion.Therefore the second lock ring 4 produces restriction to setting mechanism 3 after having set, and motion that limiting packing element 32 can not be backward (to the right side in figure), has prevented packing element 32 deblocking under improper situation.
Each embodiment in this manual all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (9)
1. an open hole packer, described open hole packer comprises central tube, axially be set in successively from front to back the joint on described central tube along described central tube, setting mechanism, be positioned at the first power transfer assembly of the axial rear side of described setting mechanism, it is characterized in that: described open hole packer also comprises and is arranged between described setting mechanism and described the first power transfer assembly and is set in the erection device outside described central tube, be arranged on the axial rear side of described the first power transfer assembly the second power transfer assembly, on described setting mechanism and described the second power transfer assembly, be respectively arranged with retaining retaining mechanism.
2. open hole packer according to claim 1, it is characterized in that: described erection device comprise float be located at wiper block on described central tube, by described wiper block card supporting positive cover therein, between the inner hole wall of described supporting positive cover and the groove of described wiper block, be provided with flexible member.
3. open hole packer according to claim 2, is characterized in that: the two ends of described supporting positive cover are bowl-shape, and the two ends of described supporting positive cover are respectively arranged with the first cone and the second cone with the corresponding coupling of its shape.
4. open hole packer according to claim 3, it is characterized in that: described wiper block is fixedly connected with described the first cone and described the second cone respectively by the first shear pin, after described the first shear pin fracture, described wiper block can be along the radial floating of described central tube.
5. open hole packer according to claim 2, is characterized in that: described supporting positive cover upwards evenly offers endoporus along its week, and in described each endoporus, all correspondence is provided with a wiper block.
6. open hole packer according to claim 1, it is characterized in that: described the first Power Component comprises the first cylinder body being fixedly connected with described central tube, can slide axially and be set in the first piston outside described the first cylinder body along described central tube, between described the first cylinder body and described first piston, form the first annular space, on described central tube, offer the first through hole being connected with described the first annular space, described the second power transfer assembly comprises the second cylinder body being fixedly connected with described the first cylinder body, the second piston being fixedly connected with described first piston, between described the second cylinder body and described the second piston, form the second annular space, on described the first cylinder body, offer the second through hole being connected with described the second annular space.
7. open hole packer according to claim 6, it is characterized in that: described the second piston bush is located at outside described the second cylinder body and is fixedly connected by the second shear pin and described the second cylinder body, after described the second shear pin fracture, described the second piston can slide axially along described the second cylinder body.
8. open hole packer according to claim 6, it is characterized in that: be arranged on retaining retaining mechanism on described the second power transfer assembly and comprise the first lock ring that is arranged in the annular gap that described the second piston and described the second cylinder body form, described the first lock ring is formed with the first corresponding stop portion with on described the second cylinder body.
9. open hole packer according to claim 1, it is characterized in that: be arranged on retaining retaining mechanism on described setting mechanism and comprise the second lock ring that is positioned at the axial rear side of described setting mechanism, described the second lock ring with on described central tube, be formed with the second corresponding stop portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171189.6U CN203847051U (en) | 2014-04-10 | 2014-04-10 | Open hole packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171189.6U CN203847051U (en) | 2014-04-10 | 2014-04-10 | Open hole packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847051U true CN203847051U (en) | 2014-09-24 |
Family
ID=51560085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420171189.6U Expired - Fee Related CN203847051U (en) | 2014-04-10 | 2014-04-10 | Open hole packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847051U (en) |
-
2014
- 2014-04-10 CN CN201420171189.6U patent/CN203847051U/en not_active Expired - Fee Related
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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: 20140924 |
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| CF01 | Termination of patent right due to non-payment of annual fee |