CN104453781B - A kind of oil well casing pressure control device - Google Patents
A kind of oil well casing pressure control device Download PDFInfo
- Publication number
- CN104453781B CN104453781B CN201410738874.7A CN201410738874A CN104453781B CN 104453781 B CN104453781 B CN 104453781B CN 201410738874 A CN201410738874 A CN 201410738874A CN 104453781 B CN104453781 B CN 104453781B
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- China
- Prior art keywords
- pressure
- steel ball
- valve body
- cap
- push rod
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
Abstract
The invention belongs to technical field of oil production engineering, specifically provide a kind of oil well casing pressure control device, including valve body, the valve body leading inside is connected with pressure cap, valve inner is set with ball seat, end steel ball and steel ball push rod, ball seat is connected with pressure cap, cut-off steel ball is placed between ball seat and steel ball push rod, steel ball push rod inner sleeve is equipped with pressure regulator valve, pressure spring is socketed with the outside of pressure regulator valve, pressure spring connects with steel ball push rod, valve body lateral tail is connected with tail cap, pressure regulation interface is connected with the wall of tail cap side, pressure regulation interface is communicated with the pressure regulation chamber of valve body, valve body between the cut-off steel ball and pressure regulator valve is provided with exhaust port.The invention adjusts the Opening pressure for ending steel ball by pressure regulation interface, and realization automatically controls casing pressure, solves the problem of oil well casing pressure control labor workload is big, improve oil pumping pump efficiency and system effectiveness, recyclable associated gas, eliminates discharge simultaneously, reduces environmental pollution and potential safety hazard.
Description
Technical field
The invention belongs to technical field of oil production engineering, and in particular to a kind of oil well casing pressure control device.
Background technology
A large amount of natural gases referred to as solution gas in stratigraphic oil pool is dissolved at high temperature under high pressure.In crude oil production, dissolving
Gas is main displacement of reservoir oil power, by the expansion of gas with separating crude oil from formation pore displacement to producing well.As fluid enters
Enter producing well, pressure is gradually reduced, solution gas is separated into free gas from crude oil gradually, and slowly expands, until departing from crude oil
Into oil sets annular space, this portion gas is then casing gas.
And if casing gas Stress control it is unreasonable or it is unlimited deflate, not only reduce oil well pump coefficient of fullness, produce gas lock
Phenomenon, the reduction oil pumping efficiency of pump, can make when serious oil well pump can not normal work, but also natural gas can be caused to waste and serious
Atmosphere pollution.
At present, the conventional casing pressure control device of oil field at home mainly has two kinds：One is artificial control emptying, is reached in casing pressure
It is artificial after certain value to be vented or open wide wellhead venting for a long time；Two be to use the valve member with voltage regulation function to be vented, but existing tune
Pressure is not directly perceived, manually long-term observation must can draw control pressure value.The labor workload of both approaches is all very big, efficiency
It is low.
The content of the invention
It is an object of the invention to provide a kind of oil well casing pressure control device, oil well casing pressure in existing crude oil production is overcome to control
Labor workload is big, and efficiency is low, it is impossible to the problem of realization automatically controls casing pressure.
Therefore, the invention provides a kind of oil well casing pressure control device, including valve body, the valve body leading inside is connected with
Pressure cap, the valve inner is set with ball seat, cut-off steel ball and steel ball push rod, and the ball seat is connected with pressure cap, the cut-off
Steel ball is placed between ball seat and steel ball push rod, and the steel ball push rod inner sleeve is equipped with the outside of pressure regulator valve, the pressure regulator valve and is socketed with
Pressure spring, the pressure spring connects with steel ball push rod, and the valve body lateral tail is connected with tail cap, tail cap side wall
On be connected with pressure regulation interface, the pressure regulation interface is communicated with the pressure regulation chamber of valve body, it is described cut-off steel ball and pressure regulator valve between
Valve body is provided with exhaust port.
Above-mentioned tail cap afterbody connects locking cap by lock screw and locking bolt.
The afterbody of above-mentioned pressure regulator valve is connected with locking cap.
Above-mentioned pressure regulation interface is provided with thread protector.
The area equation of the pressure-bearing surface of above-mentioned cut-off steel ball and the sealing surface of pressure regulator valve.
Beneficial effects of the present invention：This oil well casing pressure control device that the present invention is provided is adjusted by pressure regulation interface to be ended
The Opening pressure of steel ball, realization automatically controls casing pressure, solves the problem of oil well casing pressure control labor workload is big, improves oil well pump
Effect and system effectiveness, while recyclable associated gas, eliminates discharge, reduce environmental pollution and potential safety hazard.
The present invention is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of oil well casing pressure control device of the present invention.
Fig. 2 is scheme of installation of the oil well casing pressure control device of the present invention on oil well.
Description of reference numerals：1st, valve body；2nd, pressure cap；3rd, ball seat；4th, steel ball is ended；5th, steel ball push rod；6th, pressure spring；7、
Pressure regulator valve；8th, tail cap；9th, pressure regulation interface；10th, thread protector；11st, lock screw；12nd, locking cap；13rd, clamping screw；14th, exhaust connects
Mouthful；15th, pressure regulation chamber；16th, sleeve valve；17th, gas gathering line.
Embodiment
Embodiment 1：
In order to overcome in existing crude oil production, oil well casing pressure control labor workload is big, and efficiency is low, it is impossible to realize automatic control
The problem of casing pressure processed, present embodiments provide a kind of oil well casing pressure control device as depicted in figs. 1 and 2, including valve body 1, institute
State the leading inside of valve body 1 and be connected with pressure cap 2, the internal sleeve of valve body 1 is described equipped with ball seat 3, cut-off steel ball 4 and steel ball push rod 5
Ball seat 3 is connected with pressure cap 2, and the cut-off steel ball 4 is placed between ball seat 3 and steel ball push rod 5, the inner sleeve of steel ball push rod 5
Equipped with pressure regulator valve 7, the outside of pressure regulator valve 7 is socketed with pressure spring 6, and the pressure spring 6 connects with steel ball push rod 5, described
The lateral tail of valve body 1 is connected with tail cap 8, the side wall of tail cap 8 and is connected with pressure regulation interface 9, the pressure regulation interface 9 and valve body
1 pressure regulation chamber 15 is communicated, and the valve body 1 between the cut-off steel ball 4 and pressure regulator valve 7 is provided with exhaust port 14.
In actual use, such as Fig. 2 installations, the valve body 1 for the oil well casing pressure control device that the present embodiment is provided
Intake interface is connected to sleeve valve 16, and the connection gas gathering line 17 of exhaust port 14 enters oil production process, opens oil production process, recover the oil
The pressure P of flowJCut-off steel ball 4 and pressure regulator valve 7 are acted on simultaneously.Pressure regulation interface 9 is connected with pressure regulating pump, pressure regulating pump is pressed,
The pressure in pressure regulation chamber 15 is set to be equal to the pressure P to be setS, then the pressure P in pressure regulation chamber 15SExcept confrontation oil production process
Pressure PJOutside, residual compression PS-PJCut-off steel ball 4 will be passed to by pressure spring 6 in the form of power.Equally, steel ball is ended
4 also by oil production process pressure PJWith the elastic force (P of pressure spring 6S-PJEquivalent force) collective effect.When upstream bleed pressure is made
It is more than the pressure P of oil production process for ending the equivalent force of steel ball 4JWith the elastic force (P of pressure spring 6S-PJEquivalent force) conjunction
During power, cut-off steel ball 4 will be opened, and source gas will enter gas gathering line 17 by exhaust port 14, otherwise cut-off steel ball 4 will be closed
Close, prevent the fluid reflux of oil production process to source of the gas.
The present invention adjusts the Opening pressure for ending steel ball 4 by pressure regulation interface 9, and realization automatically controls casing pressure, solves oil well
The problem of casing pressure control labor workload is big, improves oil pumping pump efficiency and system effectiveness, while recyclable associated gas, eliminates discharge,
Reduce environmental pollution and potential safety hazard.
Embodiment 2：
A kind of oil well casing pressure control device, including valve body 1 are present embodiments provided, the leading inside of valve body 1 is connected with
Pressure cap 2, the internal sleeve of valve body 1 is connected equipped with ball seat 3, cut-off steel ball 4 and steel ball push rod 5, the ball seat 3 with pressure cap 2, institute
State cut-off steel ball 4 to be placed between ball seat 3 and steel ball push rod 5, the inner sleeve of steel ball push rod 5 is equipped with pressure regulator valve 7, the pressure regulator valve
7 outsides are socketed with pressure spring 6, and the pressure spring 6 connects with steel ball push rod 5, and the lateral tail of valve body 1 is connected with tail cap
8, pressure regulation interface 9 is connected with the side wall of tail cap 8, and the pressure regulation interface 9 is communicated with the pressure regulation chamber 15 of valve body 1, described
The valve body 1 ended between steel ball 4 and pressure regulator valve 7 is provided with exhaust port 14；The afterbody of tail cap 8 passes through lock screw 11 and lock
Determine the connection locking cap 12 of bolt 13, the afterbody of the pressure regulator valve 7 is connected with locking cap 12.
Hydraulic pressure is squeezed into pressure regulation chamber 15 by pressure regulation interface 9, when pressure regulation is finished, passes through lock screw 11, locking cap
12, locking bolt 13 limits the position of pressure regulator valve 7, to ensure the elastic force of pressure spring 6, the Opening pressure of control cut-off steel ball 4；
Then it be able to will not just be changed with the hydraulic pressure of venting pressure regulation chamber 15, the Opening pressure of sleeve valve 16, opening source of the gas can put into
Production.
Embodiment 3：
A kind of oil well casing pressure control device, including valve body 1 are present embodiments provided, the leading inside of valve body 1 is connected with
Pressure cap 2, the internal sleeve of valve body 1 is connected equipped with ball seat 3, cut-off steel ball 4 and steel ball push rod 5, the ball seat 3 with pressure cap 2, institute
State cut-off steel ball 4 to be placed between ball seat 3 and steel ball push rod 5, the inner sleeve of steel ball push rod 5 is equipped with pressure regulator valve 7, the pressure regulator valve
7 outsides are socketed with pressure spring 6, and the pressure spring 6 connects with steel ball push rod 5, and the lateral tail of valve body 1 is connected with tail cap
8, pressure regulation interface 9 is connected with the side wall of tail cap 8, and the pressure regulation interface 9 is communicated with the pressure regulation chamber 15 of valve body 1, described
The valve body 1 ended between steel ball 4 and pressure regulator valve 7 is provided with exhaust port 14；The pressure-bearing surface and pressure regulator valve 7 of the cut-off steel ball 4
Sealing surface area equation.
Due to ending the pressure-bearing surface of steel ball 4 and the sealing surface homalographic of pressure regulator valve 7, so the Opening pressure of cut-off steel ball 4
Equal to the pressure P in pressure regulation chamber 15S, so as to reach the purpose of the Opening pressure of adjusting set air valve 7 directly perceived.
Embodiment 4：
A kind of oil well casing pressure control device, including valve body 1 are present embodiments provided, the leading inside of valve body 1 is connected with
Pressure cap 2, the internal sleeve of valve body 1 is connected equipped with ball seat 3, cut-off steel ball 4 and steel ball push rod 5, the ball seat 3 with pressure cap 2, institute
State cut-off steel ball 4 to be placed between ball seat 3 and steel ball push rod 5, the inner sleeve of steel ball push rod 5 is equipped with pressure regulator valve 7, the pressure regulator valve
7 outsides are socketed with pressure spring 6, and the pressure spring 6 connects with steel ball push rod 5, and the lateral tail of valve body 1 is connected with tail cap
8, pressure regulation interface 9 is connected with the side wall of tail cap 8, and the pressure regulation interface 9 is communicated with the pressure regulation chamber 15 of valve body 1, described
The valve body 1 ended between steel ball 4 and pressure regulator valve 7 is provided with exhaust port 14；The pressure regulation interface 9 is provided with thread protector 10, thread protector
10 are connected by screw thread with pressure regulation interface 9.Crimping mouth 9 is exchanged by thread protector 10 to shield.
In summary, this oil well casing pressure control device that the present invention is provided by the intake interface of valve body 1 by being connected to set
Tube valve 16, exhaust port 14 is connected with gas gathering line 17, and the Opening pressure for ending steel ball 4 is adjusted by pressure regulation interface 9, real
Casing pressure is now automatically controlled, the problem of oil well casing pressure control labor workload is big is solved, improves oil pumping pump efficiency and system effectiveness, simultaneously
Recyclable associated gas, eliminates discharge, reduces environmental pollution and potential safety hazard.
It is exemplified as above be only to the present invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (1)
1. a kind of oil well casing pressure control device, including valve body (1), it is characterised in that：Valve body (1) leading inside is connected with
Pressure cap (2), valve body (1) internal sleeve is equipped with ball seat (3), cut-off steel ball (4) and steel ball push rod (5), the ball seat (3)
It is connected with pressure cap (2), the cut-off steel ball (4) is placed between ball seat (3) and steel ball push rod (5), the steel ball push rod
(5) inner sleeve is equipped with the outside of pressure regulator valve (7), the pressure regulator valve (7) and is socketed with pressure spring (6), the pressure spring (6)
Connect with steel ball push rod (5), valve body (1) lateral tail is connected with tail cap (8), tail cap (8) side wall and connected
There is pressure regulation interface (9), the pressure regulation interface (9) communicates with the pressure regulation chamber (15) of valve body (1), the cut-off steel ball (4)
Valve body (1) between pressure regulator valve (7) is provided with exhaust port (14)；Tail cap (8) afterbody passes through lock screw (11)
With locking bolt (13) connection locking cap (12)；The afterbody of the pressure regulator valve (7) is connected with locking cap (12)；The pressure regulation
Interface (9) is provided with thread protector (10)；The area phase of the pressure-bearing surface and the sealing surface of pressure regulator valve (7) of the cut-off steel ball (4)
Deng；
Hydraulic pressure is squeezed into pressure regulating cavity room by pressure regulation interface, when pressure regulation is finished, passes through lock screw, locking cap, locking bolt
The position of pressure regulator valve is limited, to ensure the elastic force of pressure spring, the Opening pressure of control cut-off steel ball；Then it can just be adjusted with venting
The hydraulic pressure of chamber is pressed, the Opening pressure of sleeve valve will not change, opening source of the gas can put into production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738874.7A CN104453781B (en) | 2014-12-08 | 2014-12-08 | A kind of oil well casing pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738874.7A CN104453781B (en) | 2014-12-08 | 2014-12-08 | A kind of oil well casing pressure control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104453781A CN104453781A (en) | 2015-03-25 |
| CN104453781B true CN104453781B (en) | 2017-10-17 |
Family
ID=52900457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410738874.7A Active CN104453781B (en) | 2014-12-08 | 2014-12-08 | A kind of oil well casing pressure control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104453781B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6390200B1 (en) * | 2000-02-04 | 2002-05-21 | Allamon Interest | Drop ball sub and system of use |
| CN200968199Y (en) * | 2006-09-30 | 2007-10-31 | 陈春生 | Oil well casing-pressure regulating apparatus |
| CN201377304Y (en) * | 2009-03-26 | 2010-01-06 | 中国石化股份胜利油田分公司河口采油厂 | Oil well casing pressure automatic-regulating device |
| CN202370479U (en) * | 2011-12-20 | 2012-08-08 | 冷滨虹 | Automatic oil well sleeve pressure release device |
| CN204371228U (en) * | 2014-12-08 | 2015-06-03 | 中国石油天然气股份有限公司 | A kind of oil well casing pressure control device |
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2014
- 2014-12-08 CN CN201410738874.7A patent/CN104453781B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104453781A (en) | 2015-03-25 |
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