CN201650170U - Anti-returning check valve - Google Patents
Anti-returning check valve Download PDFInfo
- Publication number
- CN201650170U CN201650170U CN2010201528144U CN201020152814U CN201650170U CN 201650170 U CN201650170 U CN 201650170U CN 2010201528144 U CN2010201528144 U CN 2010201528144U CN 201020152814 U CN201020152814 U CN 201020152814U CN 201650170 U CN201650170 U CN 201650170U
- Authority
- CN
- China
- Prior art keywords
- valve
- ball
- seat
- returning
- diameter
- 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.)
- Expired - Fee Related
Links
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 16
- 239000012530 fluid Substances 0.000 abstract description 10
- 238000004140 cleaning Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000013049 sediment Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Check Valves (AREA)
Abstract
The utility model relates to an anti-returning check valve which is mainly characterized in comprising a cylindrical valve body. The inner wall of the cylindrical valve body is successively processed with the upper joint of an oil pipe, an inverted cone valve seat and a base from top to bottom; the outer wall of the lower part of the cylindrical valve body is the lower joint of the oil pipe; a cavity is arranged between the valve seat and the base; a ball valve is arranged in the cavity; the diameter of the ball valve is more than that of one end of the inverted cone valve seat with less diameter and the internal diameter of the lower joint; and the valve ball density is 0.55-0.60. As the utility model adopts the technical scheme, when the anti-returning check valve is below liquid level in a well, buoyancy borne by the ball valve in the well liquid is more than the self weight of the valve ball, and the valve ball bears vertically upward force to upwards float to the valve seat to close a path in a pipe so as to prevent sand cleaning fluid containing sediment from returning. The single tube is integrally designed, and the utility model has simple structure, reliable sealing and convenient maintenance.
Description
Technical field
The utility model belongs to oil exploration and development fields, is specifically related to a kind of anti-returning and tells ball-and-seat.
Background technology
Usually oil, gas, the problem that well sand washing operation exists is: dashing a single termination of pumping when making up a joint, owing to contain the sand of suspension in the casing annulus fluid column, its head of liquid is greater than the head of liquid in the oil pipe, before not connecting single turn on pump, oil pipe can constantly outwards return out sand cleaning fluid, so just accelerated the subsidence velocity of sand, not only wasted sand cleaning fluid, also increased sand plug, the probability of sand card sand washing tubing string, the sand cleaning fluid that returns out simultaneously pollutes to well head, a large amount of sand cleaning fluids can steep collapse well head and workover rig base in the well workover process, therefore in above-mentioned work progress, go out from the oil pipe internal return if prevent sand cleaning fluid, the problems referred to above will be solved completely, but also do not have a kind of device can solve this technical problem at present.
Summary of the invention
The inventor is in being engaged in the work of exploration and development process of oil, well for many years, the inventor finds that there are the problems referred to above in the sand washing operation of down-hole, present oil field, through lucubrate and experiment, trial-production for many years, purpose be to provide a kind of can be in above-mentioned construction operation process, preventing that oil pipe from returning tells sand cleaning fluid, simultaneously simple in structure, sealing is reliable, and anti-returning easy to maintenance told ball-and-seat.
The technical scheme in the invention for solving the technical problem provides a kind of anti-returning and tells ball-and-seat, its structure comprises: cylinder valve, be processed with oil pipe top connection, back taper valve seat, base from top to bottom successively at the cylinder valve inwall, cylinder valve bottom outer wall is the oil pipe lower contact, between valve seat and base, be processed with cavity, establish ball valve in the cavity, the diameter of ball valve is greater than the diameter of the less end of back taper type valve-seat diameter and the internal diameter of lower contact, and valve ball density is between 0.55-0.60.
Described ball valve is the nylon ball of inner hollow.
The beneficial effects of the utility model are, anti-returning told ball-and-seat and be connected on the oil pipe top that will carry out sand washing, because the density of hollow spherical value is between 0.55-0.60, its value is lower than the density of crude oil, clear water and mud.In the lower tubular column process, return when telling ball-and-seat liquid level is following in well when anti-, buoyancy of liquid is greater than the weight of valve ball self in the suffered well of its ball valve, and valve ball is subjected to power vertically upward and floats to valve seat place blanked-off pipe internal channel, has prevented that the returning of sand cleaning fluid of containing silt from telling; The utility model adopts and comprises upper and lower joint and single current valve body, it is simple in structure, valve seat adopts back taper, in the direct circulation process, foul in the circulation fluid is difficult for piling up at the valve seat place and influences the anti-sealing of telling ball-and-seat of returning, and sealing is reliable, if the valve seat place has foul to cause anti-returning to tell the ball-and-seat blow-by, then just can get rid of with pump truck direct circulation flushing valve seat, easy to maintenance.
Description of drawings
Fig. 1 returns the half sectional view of telling ball-and-seat for the utility model is anti-.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, structure of the present utility model is further described, its structure will be more clear
The utility model is anti-, and to return what tell ball-and-seat be embodiment, referring to Fig. 1, its structure comprises: cylinder valve 1, be processed with oil pipe top connection 2, back taper valve seat 3, the base 4 of control internal thread from top to bottom successively at cylinder valve 1 inwall, the cylinder valve bottom is provided with the externally threaded oil pipe lower contact 5 of control, between valve seat 4 and base 5, be processed with cavity 6, establish ball valve 7 in the cavity 6, the diameter of ball valve 7 is greater than the diameter of the less end of back taper type valve seat 3 diameters and the internal diameter of lower contact 5, valve ball 7 is the nylon ball of inner hollow, and valve ball 7 density are between 0.55-0.60.
Claims (2)
1. anti-returning told ball-and-seat, it is characterized in that its structure comprises cylinder valve, be processed with oil pipe top connection, back taper valve seat, base from top to bottom successively at the cylinder valve inwall, cylinder valve bottom outer wall is the oil pipe lower contact, between valve seat and base, be processed with cavity, establish ball valve in the cavity, the diameter of ball valve is greater than the diameter of the less end of back taper type valve-seat diameter and the internal diameter of lower contact, and valve ball density is between 0.55-0.60.
2. anti-returning according to claim 1 told ball-and-seat, it is characterized in that described ball valve is the nylon ball of inner hollow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201528144U CN201650170U (en) | 2010-03-31 | 2010-03-31 | Anti-returning check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201528144U CN201650170U (en) | 2010-03-31 | 2010-03-31 | Anti-returning check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650170U true CN201650170U (en) | 2010-11-24 |
Family
ID=43115402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201528144U Expired - Fee Related CN201650170U (en) | 2010-03-31 | 2010-03-31 | Anti-returning check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650170U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074492A (en) * | 2014-07-08 | 2014-10-01 | 南通格雷斯智能环保设备有限公司 | Valve for sand remover pipeline |
| CN108533216A (en) * | 2018-05-23 | 2018-09-14 | 中国石油集团渤海钻探工程有限公司 | Liquid switch valve is returned in a kind of anti-tubing string |
-
2010
- 2010-03-31 CN CN2010201528144U patent/CN201650170U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074492A (en) * | 2014-07-08 | 2014-10-01 | 南通格雷斯智能环保设备有限公司 | Valve for sand remover pipeline |
| CN108533216A (en) * | 2018-05-23 | 2018-09-14 | 中国石油集团渤海钻探工程有限公司 | Liquid switch valve is returned in a kind of anti-tubing string |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20120331 |