CN201412119Y

CN201412119Y - Sand-setting type reversed check valve

Info

Publication number: CN201412119Y
Application number: CN2009203044006U
Authority: CN
Inventors: 袁新生; 李德龙
Original assignee: XINJIANG PETROLEUM ADMINISTRATION OIL-PRODUCTION TECHNOLOGY INST
Current assignee: XINJIANG PETROLEUM ADMINISTRATION OIL-PRODUCTION TECHNOLOGY INST
Priority date: 2009-06-13
Filing date: 2009-06-13
Publication date: 2010-02-24
Anticipated expiration: 2019-06-13

Abstract

The utility model relates to a reversed check valve which is a sand-setting type reversed check valve and includes a valve body, a sand-setting pipe, a pressure cap, a steel ball and a compressed spring. The lower end of the valve body is fixedly connected with the upper end of the sand-setting pipe. A boss is arranged on the inner wall in the middle of the valve body. A plug for sealing the cavity of the valve body is arranged on the bottom of the boss. The external side of the lower end of a pressure cap is fixedly connected with the internal side of the upper end of the boss. No less than one liquid inlet hole communicating the cavity of the boss and the cavity of the valve body is distributed on the pressure cap in the radial direction. The utility model has reasonable and compact structure and convenient application; the sand-setting channel axially disposed on the boss makes the sand in the liquid on the upper part of the valve body sink into the sand-setting pipe through the sand-setting channel thus preventing the sand depositing on the valve body so as to cause the reversed check valve to open normally; and avoiding loose sealing of the check valve owing to the sand supporting on the seal part so as to greatly lower the safety hidden trouble.

Description

The reverse ball-and-seat of sand setting formula

One, technical field

The utility model relates to reverse ball-and-seat, is the reverse ball-and-seat of a kind of sand setting formula.

Two, background technology

In process of oil production, the silt particle in the liquid on common reverse ball-and-seat top can constantly sink under action of gravity, is deposited on reverse ball-and-seat top, and the silt particle of deposition may make reverse ball-and-seat normally open; And when reverse ball-and-seat was opened, the silt particle of deposition may be supported on the sealing position and cause reverse ball-and-seat poorly sealed, therefore had potential safety hazard.

Three, summary of the invention

The utility model provides a kind of sand setting formula reverse ball-and-seat, overcome the deficiency of above-mentioned prior art, it can effectively solve silt particle in the liquid on reverse ball-and-seat top and be deposited on reverse ball-and-seat top and cause reverse ball-and-seat can't normally open and influence the problem of reverse ball-and-seat sealing.

The technical solution of the utility model realizes by following measure: the reverse ball-and-seat of a kind of sand setting formula comprises valve body, sand sediment pipe, pressure cap, steel ball and compression spring; The lower end of valve body and the upper end of sand sediment pipe are fixed together, on the inwall at valve body middle part, boss is arranged, the plug that seals up body cavity is arranged in the bottom of boss, the outside, lower end of pressure cap is fixed together with the inboard, upper end of boss, on pressure cap, be radially distributed with and be no less than one the inlet opening that the boss inner chamber is communicated with body cavity, on the boss below the pressure cap, be radially distributed with and be no less than one the fluid hole that the boss inner chamber is communicated with the outside, the compression spring is arranged in the boss inner chamber, between compression spring and pressure cap, steel ball is arranged, the lower end of compression spring withstands on the plug, the upper end of compression spring withstands on the steel ball and can make steel ball seat on pressure cap and seal up the boss inner chamber, axial distribution on the boss have be no less than one can make the body cavity above the boss and the sand setting passage of sand sediment pipe intracavity inter-connection, sand setting passage and fluid hole stagger mutually.

Be further optimization and/or improvements below to above-mentioned utility model technical scheme:

Above-mentioned sand sediment pipe can comprise oil pipe and plug, is installed with plug in the lower end of oil pipe, and the outside, upper end of oil pipe is fixed together by screw thread with the inboard, lower end of valve body.

The upper surface of above-mentioned pressure cap can be taper surface.

The outside, lower end of above-mentioned pressure cap can be fixed together by screw thread with the inboard, upper end of boss.

Between above-mentioned pressure cap and the boss O-ring seals can be installed.

The lower end of above-mentioned pressure cap can be the sphere shape of matching with the sphere of steel ball.

The utility model reasonable and compact in structure, easy to use, sand setting passage by axial distribution on the boss, silt particle in the liquid on valve body top is sunk in the sand sediment pipe by the sand setting passage, thereby avoiding silt particle to be deposited on valve body top causes reverse ball-and-seat normally to open, also avoid silt particle to be supported on and sealed the position and cause ball-and-seat poorly sealed, thereby greatly reduced potential safety hazard.

Four, description of drawings

Accompanying drawing 1 is looked local half section structural representation for the master of the utility model most preferred embodiment.

Accompanying drawing 2 is that the A-A of accompanying drawing 1 is to the sectional structure schematic diagram.

Accompanying drawing 3 is that the B-B of accompanying drawing 2 is to the sectional structure schematic diagram.

Coding in the accompanying drawing is respectively: 1 is valve body, and 2 is O-ring seals, and 3 is pressure cap, and 4 is steel ball, and 5 are the compression spring, 6 is boss, and 7 is body cavity, and 8 is plug, and 9 is inlet opening, and 10 is fluid hole, 11 is the sand sediment pipe inner chamber, and 12 is the sand setting passage, and 13 is oil pipe, and 14 is plug, and 15 is last oil pipe.

Five, the specific embodiment

The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.

Below in conjunction with embodiment and accompanying drawing the utility model is further described:

Shown in accompanying drawing 1,2,3, the reverse ball-and-seat of this sand setting formula comprises valve body 1, sand sediment pipe, pressure cap 3, steel ball 4 and compression spring 5; The lower end of valve body 1 and the upper end of sand sediment pipe are fixed together, boss 6 is arranged on the inwall at valve body 1 middle part, the plug 8 that seals up body cavity 7 is arranged in the bottom of boss 6, the outside, lower end of pressure cap 3 is fixed together with the inboard, upper end of boss 6, on pressure cap 3, be radially distributed with and be no less than one the inlet opening 9 that the boss inner chamber is communicated with body cavity 7, on the boss below the pressure cap 36, be radially distributed with and be no less than one the fluid hole 10 that the boss inner chamber is communicated with the outside, compression spring 5 is arranged in the boss inner chamber, between compression spring 5 and pressure cap 3, steel ball 4 is arranged, the lower end of compression spring 5 withstands on the plug 8, the upper end of compression spring 5 withstands on the steel ball 4 and can make 4 of steel balls on pressure cap 3 and seal up the boss inner chamber, have in axial distribution on the boss 6 to be no less than one the sand setting passage 12 that the body cavity 7 above the boss is connected with sand sediment pipe inner chamber 11, sand setting passage 12 staggers mutually with fluid hole 10.

Can according to actual needs the reverse ball-and-seat of above-mentioned sand setting formula be made further optimization and/or improvements:

Shown in accompanying drawing 1,3, sand sediment pipe comprises oil pipe 13 and plug 14, is installed with plug 14 in the lower end of oil pipe 13, and the outside, upper end of oil pipe 13 is fixed together by screw thread with the inboard, lower end of valve body 1.

Shown in accompanying drawing 1,3, the upper surface of pressure cap 3 is a taper surface, like this, because the guide effect of taper surface makes silt particle be difficult for being deposited on the pressure cap 3.

Shown in accompanying drawing 1,3, for the ease of connecting and maintenance, the outside, lower end of pressure cap 3 is fixed together by screw thread with the inboard, upper end of boss 6.

Shown in accompanying drawing 1,3,, between pressure cap 3 and boss 6, O-ring seals 2 is installed in order to increase sealing.

Shown in accompanying drawing 1,3, can effectively seal up the boss inner chamber in order to make steel ball 4, the lower end of pressure cap 3 is the sphere shape of matching with the sphere of steel ball 4.

Above technical characterictic has constituted most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.

The use of the utility model most preferred embodiment: at first the upper end of valve body 1 and the lower end of last oil pipe 15 are fixed together, then with in the utility model lower going-into-well, steel ball 4 is lived the boss inner chamber at the effect lower seal of compression spring 5, make the utility model be in closed condition, silt particle in the liquid on valve body 1 top can constantly sink under action of gravity, under the taper surface guiding of pressure cap 3 upper ends, enter the sand sediment pipe of bottom by the sand setting passage 12 in the boss 6.The utility model reasonable and compact in structure, easy to use, sand setting passage by axial distribution on the boss, silt particle in the liquid on valve body top is sunk in the sand sediment pipe by the sand setting passage, thereby avoiding silt particle to be deposited on valve body top causes reverse ball-and-seat normally to open, also avoid silt particle to be supported on and sealed the position and cause ball-and-seat poorly sealed, thereby greatly reduced potential safety hazard.

Claims

1, the reverse ball-and-seat of a kind of sand setting formula is characterized in that comprising valve body, sand sediment pipe, pressure cap, steel ball and compression spring; The lower end of valve body and the upper end of sand sediment pipe are fixed together, on the inwall at valve body middle part, boss is arranged, the plug that seals up body cavity is arranged in the bottom of boss, the outside, lower end of pressure cap is fixed together with the inboard, upper end of boss, on pressure cap, be radially distributed with and be no less than one the inlet opening that the boss inner chamber is communicated with body cavity, on the boss below the pressure cap, be radially distributed with and be no less than one the fluid hole that the boss inner chamber is communicated with the outside, the compression spring is arranged in the boss inner chamber, between compression spring and pressure cap, steel ball is arranged, the lower end of compression spring withstands on the plug, the upper end of compression spring withstands on the steel ball and can make steel ball seat on pressure cap and seal up the boss inner chamber, axial distribution on the boss have be no less than one can make the body cavity above the boss and the sand setting passage of sand sediment pipe intracavity inter-connection, sand setting passage and fluid hole stagger mutually.

2, the reverse ball-and-seat of sand setting formula according to claim 1 is characterized in that sand sediment pipe comprises oil pipe and plug, is installed with plug in the lower end of oil pipe, and the outside, upper end of oil pipe is fixed together by screw thread with the inboard, lower end of valve body.

3, the reverse ball-and-seat of sand setting formula according to claim 1 and 2, the upper surface that it is characterized in that pressure cap is a taper surface.

4, the reverse ball-and-seat of sand setting formula according to claim 1 and 2 is characterized in that the outside, lower end of pressure cap and the inboard, upper end of boss are fixed together by screw thread.

5, the reverse ball-and-seat of sand setting formula according to claim 3 is characterized in that the outside, lower end of pressure cap and the inboard, upper end of boss are fixed together by screw thread.

6, the reverse ball-and-seat of sand setting formula according to claim 4 is characterized in that between pressure cap and the boss O-ring seals being installed.

7, the reverse ball-and-seat of sand setting formula according to claim 5 is characterized in that between pressure cap and the boss O-ring seals being installed.

8, the reverse ball-and-seat of sand setting formula according to claim 1 and 2 is characterized in that the lower end of pressure cap is the sphere shape of matching with the sphere of steel ball.

9, the reverse ball-and-seat of sand setting formula according to claim 3 is characterized in that the lower end of pressure cap is the sphere shape of matching with the sphere of steel ball.

10, the reverse ball-and-seat of sand setting formula according to claim 7 is characterized in that the lower end of pressure cap is the sphere shape of matching with the sphere of steel ball.