CN204941451U - One is unidirectional suppresses valve - Google Patents
One is unidirectional suppresses valve Download PDFInfo
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- CN204941451U CN204941451U CN201520600024.0U CN201520600024U CN204941451U CN 204941451 U CN204941451 U CN 204941451U CN 201520600024 U CN201520600024 U CN 201520600024U CN 204941451 U CN204941451 U CN 204941451U
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- adjusting device
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Abstract
The utility model discloses and a kind of unidirectionally suppress valve, this is unidirectional suppresses valve and comprises cylindrical shell and sealing and be assemblied in piston in cylindrical shell, described piston spiral is equipped with the adjusting device for regulating its upper-lower position, and described cylindrical shell is provided with for carrying out spacing position limiting structure to moving up of described adjusting device.Adjusting device of the present utility model is and piston screw assembly relation, thus adjusting device can carry out axial limiting to piston, bears excessive shearing force upwards to avoid shear pin.While position limiting structure is to piston axial limiting, in order to enable shear pin accurately be encased in pin hole, can rotation adjustment device, move it desired location to load shear pin.The Working position relation of this unidirectional position limiting structure and pin hole of suppressing valve does not have high required precision, is convenient to processing.
Description
Technical field
The utility model relates to a kind of downhole tool of oil field development, is specifically related to a kind of unidirectionally suppress valve.
Background technology
Along with the growth of the oilfield exploitation time limit, adding the impact of geological conditions and engineering factor, there is damage in various degree in oil, well sleeve pipe.After casing deformation and subsidy well are reinforced, local sleeve bore can reduce, and when carrying out high pressure separate layer acid treatment technique, conventional downhole tool cannot, by the undergauge section of sleeve pipe, need to adopt minor diameter expanding type well packer.But minor diameter expanding type well packer to set pressure low, usually just start when 0.05MPa to expand, go into the well by sleeve shrinking diameter section process at acidifying tubing string, if down-hole overflow is large, piston effect causes cover liquid in pipe to enter oil pipe by ball seat bottom acidifying tubing string, makes oil pipe fluid column higher than sleeve pipe fluid column, when the two fluid column difference is more than 5m, minor diameter expanding type well packer will be caused to expand, set halfway, cause seal to damage.Acidifying tubing string is installed pressure limiting ball-and-seat, can stop that the liquid in sleeve pipe enters into oil pipe, packer can pass through sleeve pipe necking segment, but due to the single current characteristic of pressure limiting ball-and-seat, cause replacing acid solution, acid solution can cause formation contaminant.
Chinese patent CN201318149Y (day for announcing is on September 30th, 2009) discloses a kind of Unidirectional inner blowout control pump-out type blanking plug, this Unidirectional inner blowout control pump-out type blanking plug comprises the overcoat for being connected with oil pipe end, puts outward and is connected with shutoff plug by shear pin.The corresponding pin hole in position is all drilled with on the sidewall of overcoat and on the side of shutoff plug.Sealed by sealing ring between shutoff plug and overcoat.If apply it on acidifying tubing string, in the process that acidifying tubing string is gone into the well, due to the existence of shutoff plug, the liquid in sleeve pipe is made not enter into oil pipe, and then the problem that packer midway can be avoided to set.When carrying out the techniques such as replacement acid solution and anti-flushing well when needs, suppress from oil pipe top, when pressure is greater than the shearing limiting value of shear pin, shear pin will be cut off, and shutoff plug and overcoat are freed, and the path between oil pipe and sleeve pipe is opened.This shutoff plug can play the effect of ball-and-seat.In order to prevent shutoff plug because of the excessive and impact shear pin of the pressure in shaft bottom, the place be connected with shutoff plug at overcoat is provided with limited step.Limited step is higher with the requirement on machining accuracy of pin hole, and when needing to ensure that shutoff plug holds out against on limited step, shear pin can load.If the positional precision of pin hole and step surface can not be ensured, easily there is following problem: after shear pin loads, shutoff plug does not contact with step surface, step surface does not have and prevents shutoff plug because of the excessive and effect of impact shear pin of the pressure in shaft bottom, or after shutoff plug is in place, shear pin can not be aimed at shutoff pin hole beyond the Great Wall and cause shear pin to install.
Summary of the invention
The purpose of this utility model is to provide a kind of and unidirectionally suppresses valve, existingly unidirectionally suppresses the high technical problem of valve requirement on machining accuracy to solve.
To achieve these goals, a kind of unidirectional valve of suppressing of the utility model adopts following technical scheme: this is unidirectional suppresses valve, comprise cylindrical shell and sealing and be assemblied in piston in cylindrical shell, described piston spiral is equipped with the adjusting device for regulating its upper-lower position, and described cylindrical shell is provided with for carrying out spacing position limiting structure to moving up of described adjusting device.
Described adjusting device comprises regulating part, and one end spiral of regulating part is assemblied in the lower end of piston.
Described adjusting device also comprises baffle plate, and described baffle plate coordinates with described position limiting structure block.
Described regulating part is adjusting bolt, and described adjusting bolt is located on described baffle plate and described adjusting bolt head coordinates with described baffle plate block.
Described position limiting structure is formed by the bellmouth in cylindrical shell, and the fitting face contacted with described position limiting structure of described baffle plate is the conical surface.
The shear pin that described cylindrical shell and described piston are arranged by radial direction links together, and described cylindrical shell is provided with pin hole, and described piston is provided with cotter slot along its circumferential hoop.
Described pin hole has two at least and along cylindrical shell circumferentially.
One end in the two ends of described cylindrical shell is provided with the internal thread for being connected with corresponding oil pipe, and the other end is provided with external screw thread.
A conical seal (contact) face is provided with in the top of described piston in described cylindrical shell.
The beneficial effects of the utility model are: unidirectional valve of suppressing of the present utility model bears excessive shearing force upwards to prevent bottom pressure from crossing ambassador's shear pin and cut off, adopt and the adjusting device be assemblied on piston spiral is set on cylindrical shell moves up and carry out spacing position limiting structure, because adjusting device is and piston screw assembly relation, thus adjusting device can carry out axial limiting to piston, bear excessive shearing force upwards to avoid shear pin.While position limiting structure is to piston axial limiting, in order to enable shear pin accurately be encased in pin hole, can rotation adjustment device, the axial location of piston can be changed by rotation adjustment device, move it desired location to load shear pin.The Working position relation of this unidirectional position limiting structure and pin hole of suppressing valve does not have high required precision, is convenient to processing.
Accompanying drawing explanation
Fig. 1 is the unidirectional structural representation suppressing the embodiment of valve of the utility model.
Detailed description of the invention
The unidirectional embodiment suppressing valve of the utility model, as shown in Figure 1: this unidirectional valve of suppressing is comprised cylindrical shell 2 and sealed the piston 5 be assemblied in cylindrical shell 2 by one group of two seals circle 4, and piston 5 lower end spiral is equipped with the adjusting device for regulating its axial location.Cylindrical shell 2 is provided with and carries out spacing position limiting structure for moving up to adjusting device.Adjusting device comprises adjusting bolt 7 and baffle plate 8, and the upper end spiral of adjusting bolt 7 is assemblied in the lower end of piston 5, and the lower end of adjusting bolt 7 passes baffle plate 8, and the head of adjusting bolt 7 coordinates with baffle plate 8 block.Position limiting structure is formed by the bellmouth 9 of cylindrical shell bottom, baffle plate 8 be the conical surface with the fitting face of bellmouth 9 taper-face contact.The tapered baffle plate 8 in periphery can coordinate with bellmouth conical surface block, and defining baffle 8 moves up.In order to prevent the liquid below piston 5 from entering into piston 5 lower end between baffle plate and the bellmouth conical surface to produce active force upwards to piston 5, baffle plate 8 and bellmouth can be made to be sealed and matched.
Cylindrical shell 2 is linked together by the radial shear pin 6 arranged with piston 5, and cylindrical shell 2 is provided with pin hole 11, and piston is provided with cotter slot along its circumferential hoop.Pin hole 11 has four and uniform along cylindrical shell circumference, and pin hole 11 is screwed hole.The diameter being screwed into the part of the cotter slot of piston of shear pin 6 is less than the diameter that it is in the part in pin hole.
The upper end of cylindrical shell 2 is provided with the internal thread 1 for being connected with corresponding oil pipe, and its lower end is provided with the external screw thread 10 for being connected with corresponding oil pipe.Be provided with a conical seal (contact) face 4 in the top of piston in cylindrical shell 2, conical seal (contact) face 4 is positioned at the below of internal thread 1.
Unidirectional valve of suppressing of the present utility model is when assembling and use, adjusting bolt 7 is assemblied in the lower end of piston 5 through baffle plate 8 rear screw, then adjusting bolt 7 and piston 5 are together loaded from the below of cylindrical shell 2, on the bellmouth conical surface that the conical section of its baffle plate 8 is held out against in cylindrical shell 2, then the axial location that adjusting bolt 7 carrys out regulating piston 5 is rotated, make pin hole on piston 5 just to the pin hole on cylindrical shell, so that install shear pin 6.While rotation adjusting bolt, causing it not move axially to prevent piston 5 from rotating, corresponding instrument can be adopted from the top of piston to be resisted against piston 5 upper end, in order to more convenient control piston rotates, suitable well can be set in the upper end of piston 5, such as cross recess etc.After shear pin 6 installs, these unidirectional two ends suppressing valve are threaded on oil pipe respectively.Unidirectional valve of suppressing is with in acidifying tubing string together lower going-into-well, when under acidifying tubing string after desired location, in oil pipe, hydraulic pressure is pumped into by ground circulation pump, under the active force of hydraulic pressure, shear pin 6 on piston 5 is cut off, and in the descending screen casing fallen into below acidifying tubing string of piston 5, thus is just replacing passage and gets through, acid solution can enter into oil pipe by sleeve pipe, meets the needs that acidifying is just replacing acid solution technique.Just replacing after technique terminates, drop into steel ball from the unidirectional top suppressing valve, steel ball drops on unidirectionally suppresses valve cylinder body interior tapered sealing surface, gets final product set packer, implements separate layer acid treatment.Meanwhile, all right anti-flushing well after acidifying, thorough acid discharge, prevents residual acid corrosion tubing string.
In other embodiments, adjusting device can adopt baffle plate be welded and fixed with adjusting bolt together with integral structure, when rotating adjusting bolt, baffle plate rotates thereupon together, so also can liquid below anti-baffle plate by passing through in gap between adjusting bolt and baffle plate, and then motive force is upwards produced to piston; The monolithic construction that adjusting bolt is formed together with baffle plate can be referred to as regulating part; Even if do not arrange like this, due to the block matching relationship of adjusting bolt and baffle plate, also can play the spacing barrier effect to piston, prevent piston because bottom pressure is excessive impact shear pin.In other embodiments, in adjusting device, regulating part can adopt screw rod, and one end of screw rod is weldingly fixed on baffle plate, and other end Screw assembly is on piston; The monolithic construction that screw rod is formed together with baffle plate can be referred to as regulating part; An end of screw rod can be made to stretch out baffle plate so that use corresponding instrument to make screw rod rotate, also can arrange in the side relative to screw rod of baffle plate can with corresponding throw with the use of square toes.
In other embodiments, shoulder hole can be arranged in the bottom of cylindrical shell, and the position limiting structure on cylindrical shell can be formed by the step surface of shoulder hole.
In other embodiments, pin hole can only arrange two, and two pin holes are symmetrical about cylindrical shell.
In other embodiments, according to the unidirectional thread rotary orientation suppressing the oil pipe of the actual connection at the two ends up and down of valve, the upper end of cylindrical shell can be provided with external screw thread, internal thread is arranged in the lower end of cylindrical shell.
Claims (9)
1. unidirectionally suppress valve for one kind, comprise cylindrical shell and sealing and be assemblied in piston in cylindrical shell, it is characterized in that: described piston spiral is equipped with the adjusting device for regulating its upper-lower position, described cylindrical shell is provided with for carrying out spacing position limiting structure to moving up of described adjusting device.
2. according to claim 1ly unidirectionally suppress valve, it is characterized in that: described adjusting device comprises regulating part, one end spiral of regulating part is assemblied in the lower end of piston.
3. according to claim 2ly unidirectionally suppress valve, it is characterized in that: described adjusting device also comprises baffle plate, described baffle plate coordinates with described position limiting structure block.
4. according to claim 3ly unidirectionally suppress valve, it is characterized in that: described regulating part is adjusting bolt, described adjusting bolt is located on described baffle plate and described adjusting bolt head coordinates with described baffle plate block.
5. according to claim 3ly unidirectionally suppress valve, it is characterized in that: described position limiting structure is formed by the bellmouth in cylindrical shell, the fitting face contacted with described position limiting structure of described baffle plate is the conical surface.
6. according to claim 1ly unidirectionally suppress valve, it is characterized in that: the shear pin that described cylindrical shell and described piston are arranged by radial direction links together, and described cylindrical shell is provided with pin hole, and described piston is provided with cotter slot along its circumferential hoop.
7. according to claim 6ly unidirectionally suppress valve, it is characterized in that: described pin hole has two at least and along cylindrical shell circumferentially.
8. according to claim 1ly unidirectionally suppressing valve, it is characterized in that: the one end in the two ends of described cylindrical shell is provided with the internal thread for being connected with corresponding oil pipe, and the other end is provided with external screw thread.
9. unidirectional according to claim 1 ~ 8 any one suppresses valve, it is characterized in that: is provided with a conical seal (contact) face in the top of described piston in described cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520600024.0U CN204941451U (en) | 2015-08-11 | 2015-08-11 | One is unidirectional suppresses valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520600024.0U CN204941451U (en) | 2015-08-11 | 2015-08-11 | One is unidirectional suppresses valve |
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| Publication Number | Publication Date |
|---|---|
| CN204941451U true CN204941451U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520600024.0U Active CN204941451U (en) | 2015-08-11 | 2015-08-11 | One is unidirectional suppresses valve |
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| CN (1) | CN204941451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345068A (en) * | 2019-07-05 | 2019-10-18 | 深圳景嘉机电科技有限公司 | A kind of submersible electric pump integration valve |
-
2015
- 2015-08-11 CN CN201520600024.0U patent/CN204941451U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345068A (en) * | 2019-07-05 | 2019-10-18 | 深圳景嘉机电科技有限公司 | A kind of submersible electric pump integration valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |