CN203394434U - Underground sleeve pressure relief valve for heavy oil horizontal well - Google Patents
Underground sleeve pressure relief valve for heavy oil horizontal well Download PDFInfo
- Publication number
- CN203394434U CN203394434U CN201320319774.1U CN201320319774U CN203394434U CN 203394434 U CN203394434 U CN 203394434U CN 201320319774 U CN201320319774 U CN 201320319774U CN 203394434 U CN203394434 U CN 203394434U
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- relief valve
- pressure relief
- sleeve pressure
- heavy oil
- oil
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Abstract
An underground sleeve pressure relief valve for a heavy oil horizontal well belongs to the technical field of petroleum exploitation. The underground sleeve pressure relief valve is provided with upper internal threads for connecting an oil pipe having a diameter of 88.9mm. The underground sleeve pressure relief valve comprises a bulkhead which connects air inlets through screw threads which are convenient for dismounting and allows replacement of four balls. The underground sleeve pressure relief valve comprises four steel balls connected in the air inlets. The diameter of the four air inlet is 6mm. The upper portion of the underground sleeve pressure relief valve is provided with a 45-degree circular inclined plane, the lower portion is provided with a 45-degree circular inclined plane and pipe threads and connected with an oil pipe having a diameter of 88.9mm. The underground sleeve pressure relief valve when applied in heavy oil production eliminates the influence of sleeve pressure on production of heavy oil, reduces labor intensity, lows cost, and has excellent effect and promising prospect.
Description
Technical field
The utility model relates to a kind of thick oil horizontal well down-hole casing pressure vent valve, belongs to oil development technical field.
Background technology
In oilfield development process, along with the output of oil gas, in thick oil horizontal well sleeve pipe, can produce a large amount of casing gas, if not in time gas is discharged, to affect the normal operation of down-hole deep well pump, the casing gas that oil recovery work often will be to association in rod-pumped well, bleeds off pressure.Increased a large amount of workloads.In thin oil oilfield development process, extensively adopt well head fixed pressure air releasing valve, automatically the gas in drain sleeve.Valve discharging gas under certain pressure is used in heavy oil development process, causes spool sticky dead by viscous crude, and valve discharging gas under certain pressure cannot normally be opened.
In Oil Field management, oil well casing pressure is high, the harm that personnel and equipment are caused:
(1) casing pressure is high, and producing fluid level in sleeve pipe is declined, and the submergence of pump reduces, and meanwhile, entering in pump will be gas mixture, and the oily volume entering in pump reduces, and affect the keying of valve, thereby causes pump efficiency reduction.
(2) operating personnel, when well head is put casing pressure, take slowly to open sleeve valve and bleed off pressure, and in process, as do not control valve well and will cause sleeve pipe oil spout, even can cause pollution in wide area.
(3) operating personnel do not control valve well, carry out unexpected open flow, can cause the serious ，Dui of formation sand production stratum to damage.
(4) misoperation while entering casing pressure, noise can surpass 70 decibels of industrial enterprise's noise criterias, to operating personnel's health, can impact.
(5) bleed off pressure suddenly, can cause local toxic and harmful content to raise, form potential safety hazard.
(6) the too high oil well fuel-displaced oil well that even causes at intermittence that causes of casing pressure, without output, makes cursor and packing dry grinding, causes packing oil leakage, shortens the life cycle of packing.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of thick oil horizontal well down-hole casing pressure vent valve.
A down-hole casing pressure vent valve, has upper internal threaded; There is plug to connect air inlet; There is steel ball to be connected in air inlet; Have air inlet, air inlet diameter is 6mm, has 4 air inlets; Circular 45Du inclined-plane is arranged at top, and circular 45Du inclined-plane is arranged at bottom, and gas thread is arranged at bottom, the oil pipe of bottom connection diameter 88.9mm.
A down-hole casing pressure venting pressure regulation method, contains following steps; The gas producing, by vent valve, enters oil pipe from sleeve pipe; Sleeve pipe annular space gas pressure in oil well is during higher than oil pipe internal pressure, and gas plays spheroid, and gas is through sleeve pipe, and--pore---valve seat----air inlet enters oil pipe inner chamber.Gas pressure in sleeve pipe is during lower than oil pipe internal pressure, and valve, by gravity fall, joins with valve seat, and the oil in oil pipe, can not return to sleeve pipe, can only be by sleeve pipe oil inlet pipe.
The utility model has the advantages that:
1, by valve discharging gas under certain pressure, reasonably control casing pressure, make producing fluid level increase, pump submergence increases, and output is increased.
2, reduce operating personnel's the number of times that bleeds off pressure, thereby alleviated labour intensity, effectively stopped the injury to operating personnel of toxic and harmful and noise.
3, stopped to run oil and pollute because putting the large area that casing gas causes.
4, down-hole vent valve is controlledly at the uniform velocity put casing pressure, has effectively protected stratum, prevents from causing shaking out because instantaneous pressure changes.
5, can not cause the rising of local toxic and harmful content.
6, make the working condition of pump normal, the life cycle of packing extends.
7, do not occur again, because the sticky dead phenomenon of the low valve ball of temperature.
The utility model is the application test in viscous crude is produced by down-hole casing pressure vent valve, thoroughly solves the impact that casing pressure is produced viscous crude; Alleviate operating personnel's labour intensity; With low cost, successful, has good promotion prospect.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by the detailed description with reference to below, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, form a part of the present utility model, schematic description and description of the present utility model is used for explaining the utility model, do not form improper restriction of the present utility model, as schemed wherein:
Fig. 1 is structural representation of the present utility model.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
The specific embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present utility model belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1, a kind of thick oil horizontal well down-hole casing pressure vent valve, has upper internal threaded: be used for the oil pipe of connection diameter 88.9mm; Have plug 1 to connect air inlet 3, plug 1 is that screwed connection is for convenience detach, can be used for changing totally 4 spheroids; Have steel ball 2 to be connected in air inlet, it is 4 that steel ball sphere diameter is less than 6mm; Have 4 air inlets 3, the diameter of air inlet 3 is 6mm; Circular 45Du inclined-plane 5 is arranged at top, and circular 45Du inclined-plane 6 is arranged at bottom, is putting down-hole, during looped pipeline, prevents that oil pipe and looped pipeline from can not block, touching.In bottom, there is gas thread 4, the oil pipe of bottom connection diameter 88.9mm.
Oilfield Operation District, Feng city, has processed 2 cover thick oil horizontal well down-hole casing pressure vent valves, and by staff's field experiment, effect is very good.
As mentioned above, embodiment of the present utility model is explained, but as long as not departing from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, within such variation is also all included in protection domain of the present utility model.
Claims (1)
1. a thick oil horizontal well down-hole casing pressure vent valve, is characterized in that there is upper internal threaded; There is plug to connect air inlet; There is steel ball to be connected in air inlet; Have air inlet, air inlet diameter is 6mm, has 4 air inlets; Circular 45Du inclined-plane is arranged at top, and circular 45Du inclined-plane is arranged at bottom, and gas thread is arranged at bottom, the oil pipe of bottom connection diameter 88.9mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320319774.1U CN203394434U (en) | 2013-06-05 | 2013-06-05 | Underground sleeve pressure relief valve for heavy oil horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320319774.1U CN203394434U (en) | 2013-06-05 | 2013-06-05 | Underground sleeve pressure relief valve for heavy oil horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203394434U true CN203394434U (en) | 2014-01-15 |
Family
ID=49905970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320319774.1U Expired - Fee Related CN203394434U (en) | 2013-06-05 | 2013-06-05 | Underground sleeve pressure relief valve for heavy oil horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203394434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213871A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Underground casing pressure deflation valve and pressure adjusting method of heavy oil well |
-
2013
- 2013-06-05 CN CN201320319774.1U patent/CN203394434U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213871A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Underground casing pressure deflation valve and pressure adjusting method of heavy oil well |
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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: 20140115 Termination date: 20210605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |