CN2688881Y - Internal pressure normally opening sliding valve under oil extracting well - Google Patents
Internal pressure normally opening sliding valve under oil extracting well Download PDFInfo
- Publication number
- CN2688881Y CN2688881Y CNU200420040123XU CN200420040123U CN2688881Y CN 2688881 Y CN2688881 Y CN 2688881Y CN U200420040123X U CNU200420040123X U CN U200420040123XU CN 200420040123 U CN200420040123 U CN 200420040123U CN 2688881 Y CN2688881 Y CN 2688881Y
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- China
- Prior art keywords
- piston
- annular
- annular piston
- valve
- valve body
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- Expired - Fee Related
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Abstract
The utility model relates to an internal pressure normally opening sliding valve under oil extracting wells, which is composed of a valve base, a movable sealing ring, an annular piston, a spiral spring, a valve body, a hydraulic pressure push piston, a fixed sealing ring and a valve cap. The utility model is in barrel shape; the valve base and the valve cap are connected by threads of the valve body; the annular piston is arranged at the upper part in the valve body and the annular hydraulic pressure push piston is arranged at the lower part in the valve body; the spiral spring is arranged between the annular piston and the valve body, above the annular hydraulic pressure push piston and below the valve base; inner threads are arranged at the upper part of the valve base; a liquid communication hole from inside to outside is arranged at the middle part; main threads are arranged at the lower part of the valve cap; an annular platform is arranged at the outer periphery of the lower part of the annular piston; a platform corresponding to the platform arranged at the outer periphery of the lower part of the annular piston is arranged at the inner periphery of the hydraulic pressure push piston; the two platforms are correspondingly buckled together. The sectional area of the hydraulic pressure push piston is bigger than the sectional area of the annular piston. When the hydraulic pressure in a pipe column is increased to the sealing pressure, the hydraulic pressure pushes the piston and the annular piston to move upwards and the spring is supported upwards so that the liquid communication hole is sealed. When the pressure is released to reach pressure balance, the two pistons simultaneously move downwards by means of the pressure of an upper cross section of the annular piston and spring force to open the liquid communication hole.
Description
One, technical field
The utility model relate to a kind of oil well delamination annotate adopt producing well that set packer uses down in pressure often drive guiding valve.
Two, background technology
At present to annotate the endoporus internal diameter obstructed or through hole of the ball-and-seat of adopting use, bridge-type valve, effluent valve, resistance valve too little for oil well delamination, can not pass through logging instrument, can not log well under the situation of the normal oil recovery of oil well.
Three, summary of the invention
The purpose of this utility model is at the existing defective of prior art, design a kind of can be by logging instrument producing well down in pressure often drive guiding valve.
The technical solution of the utility model realizes in the following manner:
The utility model is by valve seat, dynamic seal ring, annular piston, helical spring, valve body, the hydraulic drive piston, static seal circle and bonnet are formed, it is characterized in that the utility model is cylindrical, valve seat links to each other with screw thread by valve body with bonnet, the valve body internal upper part is provided with annular piston, interior bottom is provided with annular hydraulic drive piston, between annular piston and valve body, on annular hydraulic pressure push piston, be provided with coil spring under the valve seat, valve seat top is provided with internal thread, the middle part is provided with liquid-through hole from inside to outside, the bonnet bottom is provided with male thread, the annular piston lower, outer perimeter is provided with ring-shaped platform, be provided with in week and the corresponding platform of annular piston lower, outer perimeter platform in the hydraulic drive piston, two platform correspondences are buckled together, the sectional area of hydraulic drive piston is greater than the sectional area of annular piston, when hydraulic pressure in the tubing string is increased to when setting pressure, the hydraulic drive piston promotes the up and last pressing spring of annular piston, seal liquid-through hole, when pressure discharges the back pressure balance, make the two-piston descending liquid-through hole of opening simultaneously by annular piston upper section pressure and spring force;
All movable sealings in the annular piston upper periphery is provided with dynamic seal ring and valve seat, the platform place in week is provided with the static seal circle in the hydraulic drive piston, form static seal with the annular piston lower, outer perimeter, be provided with week formation movable sealing in dynamic seal ring and the valve body lower portion in the periphery of hydraulic drive piston;
Valve body top internal diameter is big, and the bottom internal diameter is little, and top and bottom portion is provided with box thread separately.
Compared with the prior art the utility model has the following advantages:
1, simple in structure, reasonable in design.
2, internal diameter is big, can pass through logging instrument, does not influence production during the well logging bottom pressure.
3, liquid-through hole is often opened when the tubing string internal and external pressure balance, closes through hole when the pressure of set packer reaches simultaneously.
Four, description of drawings
Fig. 1-structural representation of the present utility model.
1-valve seat 2-dynamic seal ring 3-annular piston (guiding valve) 4-helical spring 5-valve body 6-hydraulic drive piston 7-static seal circle 8-bonnet among the figure
Five, embodiment
For further disclosing the technical solution of the utility model, be further described by embodiment below in conjunction with Figure of description:
The utility model is by valve seat 1, dynamic seal ring 2, annular piston 3, helical spring 4, valve body 5, hydraulic drive piston 6, static seal circle 7, bonnet 8 is formed, it is characterized in that the utility model is cylindrical, valve seat links to each other with screw thread by valve body with bonnet, the valve body internal upper part is provided with annular piston, interior bottom is provided with annular hydraulic drive piston, between annular piston and valve body, on annular hydraulic pressure push piston, under valve seat, be provided with coil spring, valve seat top is provided with internal thread, the middle part is provided with liquid-through hole from inside to outside, the bonnet bottom is provided with male thread, the annular piston lower, outer perimeter is provided with ring-shaped platform, be provided with in week and the corresponding platform of annular piston lower, outer perimeter platform in the hydraulic drive piston, two platform correspondences are buckled together, the sectional area of hydraulic drive piston is greater than the sectional area of annular piston, when hydraulic pressure in the tubing string is increased to when setting pressure, the hydraulic drive piston promotes the up and last pressing spring of annular piston, seal liquid-through hole, when pressure discharges the back pressure balance, make the two-piston descending liquid-through hole of opening simultaneously by annular piston upper section pressure and spring force.Week forms movable sealing in the annular piston upper periphery is provided with dynamic seal ring and valve seat, the platform place in week is provided with the static seal circle in the hydraulic drive piston, form static seal with the annular piston lower, outer perimeter, be provided with week formation movable sealing in dynamic seal ring and the valve body lower portion in the periphery of hydraulic drive piston; Valve body top internal diameter is big, and the bottom internal diameter is little, and top and bottom portion is provided with box thread separately.
Claims (3)
1, the down interior pressure of a kind of producing well is often driven guiding valve, by valve seat, dynamic seal ring, annular piston, helical spring, valve body, the hydraulic drive piston, static seal circle and bonnet are formed, it is characterized in that the utility model is cylindrical, valve seat links to each other with screw thread by valve body with bonnet, the valve body internal upper part is provided with annular piston, interior bottom is provided with annular hydraulic drive piston, between annular piston and valve body, on annular hydraulic pressure push piston, be provided with coil spring under the valve seat, valve seat top is provided with internal thread, the middle part is provided with liquid-through hole from inside to outside, the bonnet bottom is provided with male thread, the annular piston lower, outer perimeter is provided with ring-shaped platform, be provided with in week and the corresponding platform of annular piston lower, outer perimeter platform in the hydraulic drive piston, two platform correspondences are buckled together, the sectional area of hydraulic drive piston is greater than the sectional area of annular piston, when hydraulic pressure in the tubing string is increased to when setting pressure, the hydraulic drive piston promotes the up and last pressing spring of annular piston, seal liquid-through hole, when pressure discharges the back pressure balance, make the two-piston descending liquid-through hole of opening simultaneously by annular piston upper section pressure and spring force.
2, the down interior pressure of producing well according to claim 1 is often driven guiding valve, it is characterized in that all movable sealings in the annular piston upper periphery is provided with dynamic seal ring and valve seat, the platform place in week is provided with the static seal circle in the hydraulic drive piston, form static seal with the annular piston lower, outer perimeter, be provided with week formation movable sealing in dynamic seal ring and the valve body lower portion in the periphery of hydraulic drive piston.
3, the down interior pressure of producing well according to claim 1 is often driven guiding valve, it is characterized in that valve body top internal diameter is big, and the bottom internal diameter is little, and top and bottom portion is provided with box thread separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200420040123XU CN2688881Y (en) | 2004-04-21 | 2004-04-21 | Internal pressure normally opening sliding valve under oil extracting well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200420040123XU CN2688881Y (en) | 2004-04-21 | 2004-04-21 | Internal pressure normally opening sliding valve under oil extracting well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2688881Y true CN2688881Y (en) | 2005-03-30 |
Family
ID=34671347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200420040123XU Expired - Fee Related CN2688881Y (en) | 2004-04-21 | 2004-04-21 | Internal pressure normally opening sliding valve under oil extracting well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2688881Y (en) |
-
2004
- 2004-04-21 CN CNU200420040123XU patent/CN2688881Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |