CN208816087U - A kind of Operating Pressure blowout prevention valve - Google Patents

A kind of Operating Pressure blowout prevention valve Download PDF

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Publication number
CN208816087U
CN208816087U CN201820802661.XU CN201820802661U CN208816087U CN 208816087 U CN208816087 U CN 208816087U CN 201820802661 U CN201820802661 U CN 201820802661U CN 208816087 U CN208816087 U CN 208816087U
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CN
China
Prior art keywords
shear pin
sealing
valve
operating pressure
blowout prevention
Prior art date
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Active
Application number
CN201820802661.XU
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Chinese (zh)
Inventor
张建党
李红跃
张忠涛
游静
陈杰
贾永江
孙香梅
张兴权
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Service Corp
Sinopec North China Petroleum Engineering Corp
Sinopec North China Petroleum Engineering Corp Downhole Operation Branch
Original Assignee
Sinopec Oilfield Service Corp
Sinopec North China Petroleum Engineering Corp
Sinopec North China Petroleum Engineering Corp Downhole Operation Branch
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Application filed by Sinopec Oilfield Service Corp, Sinopec North China Petroleum Engineering Corp, Sinopec North China Petroleum Engineering Corp Downhole Operation Branch filed Critical Sinopec Oilfield Service Corp
Priority to CN201820802661.XU priority Critical patent/CN208816087U/en
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Publication of CN208816087U publication Critical patent/CN208816087U/en
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Abstract

The utility model provides a kind of Operating Pressure blowout prevention valve, including the valve body axially vertically extended, valve inner crosses liquid channel equipped with what is vertically extended, this crosses liquid channel with cascaded surface ladder hole section directed downwardly, the sealing mandrel for blocking liquid channel is equipped in ladder hole section, sealing mandrel is directly fixed together by shear pin and valve body.In flow string Operating Pressure, positive pressure is beaten into tubing string, the shear pin stress on mandrel is sealed and cuts simultaneously or slide to tail pipe screen casing or spider, and valve ball is fallen on valve seat, at this point, the blowout prevention valve forms check valve, realizes Operating Pressure.

Description

A kind of Operating Pressure blowout prevention valve
Technical field
The utility model relates to the Operating Pressure blowout preventions in a kind of blowout prevention valve more particularly to a kind of different well type Operating Pressures Valve.
Background technique
As oilfield prospecting developing enters the middle and later periods, after high pressure reservoir water injection well, well head overflow well, pressure break flowing well and The operations problem wells such as flowing well, gas well are more and more after perforation, and routine work mode has been after existing well killing fluid kill-job or open flow It is not suitable with the needs of the benefit exploitation in oil field.The research application of Operating Pressure preferably solves above-mentioned problem, band in recent years Pressure operation can protect reservoir state to the maximum extent, avoid the injury caused by reservoir during routine work, it is ensured that oil gas field Volume increase stable yields, provide good technical support for the long period of development and steady production of oil gas field.The key technology of Operating Pressure First is that in well tubing string choked technique.
In the prior art, a kind of oil pumping is disclosed in the Chinese utility model patent that Authorization Notice No. is CN20283351U Preventer is pumped, there is one to be crossed liquid channel in its valve body, crossing in liquid channel has a sealing mandrel and sealing shroud, seals mandrel Shear pin is equipped with by sealing shroud and cotter slot is relatively-stationary links together;It seals mandrel and sealing is solid as a whole It was scheduled in liquid channel, and played sealing function.But it since sealing mandrel and sealing shroud needs are fitted together in advance in advance, is reloaded into Valve body, complex process, in assembly and when lower tubular column, is easy to damage the tightness of shear pin, and shear pin is caused to fall off in advance loss of seal Property.
Utility model content
The purpose of this utility model is to provide a kind of Operating Pressure blowout prevention valve, solve in the prior art, complete well with pressure is stifled It is complicated to fill in tool process, leakproofness is easy the problem of losing in advance.
To solve problems of the prior art, the utility model Operating Pressure blowout prevention valve is designed, comprising: axially along upper The valve body that lower direction extends, valve inner cross liquid channel equipped with what is vertically extended, this crosses liquid channel with cascaded surface court Under ladder hole section, the sealing mandrel for blocking liquid channel is equipped in ladder hole section, sealing mandrel has and the ladder Hole section cascaded surface block cooperation stop section, the sealing mandrel be equipped with shear pin grafting recess portion, the valve body be equipped with The corresponding shear pin mounting hole of the shear pin grafting recess portion, and by being installed in the shear pin mounting hole and shear pin grafting recess portion Shear pin will seal mandrel together with valve body fixing assembling, and the shear pin mounting hole on valve body is that outer end extends on valve body outer peripheral surface Through-hole, sealing mandrel have upward for when suppressing pressure-bearing with force shear pin be broken pressure-bearing surface.
Sealing the shear pin grafting recess portion on mandrel is annular groove.
The beneficial effects of the utility model are: the sealing mandrel was directly anchored to the limit in liquid channel by shear pin On the stepped hole of position, liquid sealing is formed crossing in liquid channel, can guarantee that sealing mandrel will not fall off in completion practice, guarantee blowout prevention The sealing of valve.
As another improvement of the utility model Operating Pressure blowout prevention valve, the valve body is by top connection and lower contact group At;What top connection and lower contact joint face were generally flush in axial longitudal section;It ensure that resistance when lower tubular column reaches lesser water It is flat.
The top connection has the sealing top pressure face cooperated with lower contact end face seal, and sealing top pressure face is equipped with sealing ring Or equipped with the sealing with the sealing ring press sealing cooperation having in the lower contact.Realize in operation lower contact it Between sealing.
Shear pin mounting hole on the valve body is arranged in lower contact, in the top connection above the shear pin mounting hole Equipped with sealed ball seat, activity is equipped with for cooperating with sealed ball seat to block the valve ball in liquid channel in top connection, described Sealing mandrel includes that the fixation shaft part being assemblied in the major diameter section of the ladder hole section and gap are installed on the ladder hole section Path section in for valve ball to be pushed away to the mandril section of valve seat pushing tow valve ball, the shear pin grafting recess portion is arranged in the fixation On shaft part.
Baffle of porous baffle is equipped in the top connection above the valve ball.
Another as the utility model Operating Pressure blowout prevention valve is improved, in annular groove on the sealing mandrel Top is equipped with closure gasket groove, is equipped in closure gasket groove and seals cooperation with the ladder hole section to block the sealing ring in liquid channel. When suppressing in tubing string, what pressure touched first is to seal the pressure-bearing surface of mandrel, and sealing ring is set to before shear pin, so not The leakproofness that liquid pipe road can be lost before shear pin cutting, will not also destroy the stress performance of shear pin.
Detailed description of the invention
Fig. 1 is the utility model Operating Pressure blowout prevention valve assembling structure schematic diagram;
Fig. 2 is the top connection structural schematic diagram of the utility model Operating Pressure blowout prevention valve;
Fig. 3 is the sealed ball seat schematic diagram of the utility model Operating Pressure blowout prevention valve;
Fig. 4 is the lower contact schematic diagram of the utility model Operating Pressure blowout prevention valve;
Fig. 5 is the sealing mandrel schematic diagram of the utility model Operating Pressure blowout prevention valve;
Fig. 6 is operation schematic diagram of the utility model Operating Pressure blowout prevention valve in pumpingh well completion tubular column with pressure;
Fig. 7 is operation schematic diagram of the utility model Operating Pressure blowout prevention valve in separate water injection well completion tubular with pressure;
Fig. 8 is operation schematic diagram of the utility model Operating Pressure blowout prevention valve in gas well completion tubular column with pressure;
In Fig. 6: 61- oil reservoir, 62- oil well pump, 63- Operating Pressure blowout prevention valve, 64- screen casing, 65- spider;
In Fig. 7: 71- fills the water layer one, and 72- fills the water layer two, 73- packer one, 74- injection well downhole flow regulator one, 75- packer two, 76- Injection well downhole flow regulator two, 77- Operating Pressure blowout prevention valve, 78- screen casing, 79- spider;
In Fig. 8: 81- Operating Pressure blowout prevention valve (removal valve ball), 82- screen casing, 83- spider.
Specific embodiment
Specific embodiment of the present utility model is described further with reference to the accompanying drawing.
The structure of the Operating Pressure blowout prevention valve is as shown in Figures 1 to 5, and blowout prevention valve includes: top connection 1, lower contact 4;On connect First 1 and lower contact 4 be connected through a screw thread form an inside cross liquid channel;Ball seat 3 and valve ball 2 are equipped in top connection;? There is a ladder hole section 43 in 4 part of lower contact crossed in liquid channel, and ladder hole section 43 is equipped with and extends out to valve body outer peripheral surface On shear pin mounting hole 44;The sealed core for the stepped ramp type shape that can deviate from after suppressing in one tubing string is installed in ladder hole section 43 Axis 5.
Sealing mandrel 5 includes that the fixation shaft part being assemblied in the major diameter section of ladder hole section 43 and gap are installed on ladder The mandril section for being used to push away valve ball 23 pushing tow valve ball of ball seat in the path section of hole section.
The fixation shaft part for sealing mandrel 5 is equipped with the seal groove 51 and shear pin fixing groove 52 for being used for sealing.It is close in assembly The shear pin mounting hole 44 in shear pin fixing groove 52 and ladder hole section 43 on envelope mandrel 5 matches;By sealing mandrel 5 by cutting Nail 6 is fixed in lower contact.
As the another embodiment of the utility model Operating Pressure blowout prevention valve, the shear pin fixing groove on mandrel 5 is sealed 52 also could alternatively be with the matched round shear pin hole of ladder hole section 43, so improve the intensity of fastening, but also opposite increase The difficulty of assembly technology is added.
What top connection 1 and 4 joint face of lower contact were generally flush in axial longitudal section;Ensure that resistance when lower tubular column reach compared with Small level.As the another embodiment of the utility model Operating Pressure blowout prevention valve, it can also guarantee that joint face is concordant In the case where the periphery of lower contact, tubing string direction is made into the taper that diameter is gradually reduced downwards, the resistance of inlet pipe column can be made in this way Power is smaller.
It seals and is equipped with sealing ring in the seal groove 51 on mandrel 5, make to seal formation sealing between mandrel 5 and lower contact 4.It is close Sealing groove 51 is set to before shear pin fixing groove 52, and sealing mandrel 5 in this way has good force structure, can before complete well is suppressed Play sealing function.When oil well pump is started to work, positive pressure is beaten in tubing string, under the action of ladder hole section 43, seals mandrel 5 It can only be slid downwardly into screen casing tail pipe, guarantee that tubing string works normally, realize the function of valve.
When completion practice with pressure applied to oil pumping well, as shown in Figures 1 to 6.
First the original standing valve of oil well pump 62 is laid down, by the utility model Operating Pressure blowout prevention valve top connection 1 The outer connection screw thread 11 in portion is connected with the lower part box thread of oil pump sleeve;By connecting in 4 lower part of the utility model lower contact The tail pipe (or with spider 65) for connecing screw thread 45 and screen casing 64 is connected.By in seal groove 51 in sealing mandrel 5 when lower tubular column Ladder hole section 43, which is formed, in sealing ring 7 and lower contact 4 seals, and can prevent highly pressurised liquid in the well of lower part from entering top, to hinder Only liquid sprays in well, it is ensured that lower tubular column with pressure is gone on smoothly.Oil well pump 62 is in place on rear lower sucker rod and piston to pump barrel Side, is just suppressing pump line, and shear pin 6 is cut, sealing mandrel 5 landing to screen casing 64 or spider 65, falls on sealed ball seat under valve ball 2 On 3 conical seal (contact) face 31, Operating Pressure blowout prevention valve 63 realizes the pumping function of standing valve at this time.
When completion practice with pressure applied to dispensing well, referring to Fig. 1 to Fig. 5 and Fig. 7.
It dispenses in well, there is successively spaced apart water filling layer 1 and water filling layer 2 72, corresponding be equipped with will be corresponding Two groups of packers of layering are insulated, corresponding includes packer 1 and packer 2 75, and tubing string is equipped with corresponding with water filling layer one Injection well downhole flow regulator 1, with the water filling corresponding injection well downhole flow regulator 2 76 of layer two and corresponding Operating Pressure blowout prevention valve 77.
Pass through the interior connection screw thread 45 of 4 lower part of lower contact of the utility model Operating Pressure blowout prevention valve and the tail pipe of screen casing 78 It is connected;It is connected by the outer connection screw thread 11 on 1 top of the utility model top connection with top oil pipe lower part box thread.Lower tubular column When by seal groove 51 sealing ring 7 and ladder hole section 43 formed and sealed, highly pressurised liquid can be prevented to enter in the well of lower part upper Portion, so that liquid in well be prevented to spray, it is ensured that lower tubular column with pressure is gone on smoothly.It is just suppressed when in design position, oil pipe, Shear pin 6 is cut, sealing mandrel 5 landing to screen casing 78 or spider 79, and the conical seal (contact) face 31 of sealed ball seat 3 is fallen under valve ball 2 On, packer setting, dispensing and backwash well operations are realized at this time.
When complete well with pressure applied to gas well, referring to Fig. 1 to Fig. 5 and Fig. 8.
The valve ball 2 for first taking out the utility model Operating Pressure blowout prevention valve passes through the interior connection screw thread 45 and sieve of 4 lower part of connector The tail pipe of pipe 82 is connected;It is connected by the outer connection screw thread 11 on 1 top of top connection with top oil pipe lower part box thread.Lower tubular column When, by seal groove 51 sealing ring 7 and ladder hole section 43 formed and sealed, highly pressurised liquid can be prevented to enter in the well of lower part upper Portion, so that liquid in well be prevented to spray, it is ensured that lower tubular column with pressure is gone on smoothly.It is just suppressed when in design position, oil pipe, Shear pin 6 is cut, and sealing mandrel 5 slides to screen casing 82 or spider 83, and oil jacket is connected at this time, realizes production.

Claims (7)

1. a kind of Operating Pressure blowout prevention valve, including the valve body axially vertically extended, valve inner is equipped with along the vertical direction Liquid channel is crossed in extension, this, which crosses liquid channel, has cascaded surface ladder hole section directed downwardly, is equipped in ladder hole section for blocking liquid The sealing mandrel in channel, sealing mandrel have the stop section cooperated with the cascaded surface block of the ladder hole section, it is characterised in that: The sealing mandrel is equipped with shear pin grafting recess portion, and the valve body is installed equipped with shear pin corresponding with the shear pin grafting recess portion Hole, and the shear pin by being installed in the shear pin mounting hole and shear pin grafting recess portion will seal mandrel and valve body is securely fitted in Together, the shear pin mounting hole on valve body is that outer end extends to the through-hole on valve body outer peripheral surface, and sealing mandrel has being used for upward Pressure-bearing surface of the pressure-bearing to force shear pin to be broken when suppressing.
2. Operating Pressure blowout prevention valve according to claim 1, it is characterised in that: the valve body includes removable fixing assembling Top connection and lower contact together, top connection and lower contact are concordant at the edge of axial longitudal section of junction.
3. Operating Pressure blowout prevention valve according to claim 2, it is characterised in that: the top connection has and lower contact end face Seal the sealing top pressure face of cooperation, sealing top pressure face be equipped with sealing ring or equipped with the sealing ring that has in the lower contact The sealing of press sealing cooperation.
4. Operating Pressure blowout prevention valve according to claim 1, it is characterised in that: the shear pin grafting on the sealing mandrel is recessed Portion is annular groove.
5. Operating Pressure blowout prevention valve according to claim 4, it is characterised in that: in annular groove on the sealing mandrel Top be equipped with closure gasket groove, be equipped in closure gasket groove to seal with the ladder hole section and cooperate to block the sealing in liquid channel Circle.
6. Operating Pressure blowout prevention valve according to claim 2, it is characterised in that: the shear pin mounting hole setting on the valve body In lower contact, sealed ball seat is equipped in the top connection above the shear pin mounting hole, activity is equipped in top connection For matching with sealed ball seat and to block the valve ball in liquid channel, the sealing mandrel includes be assemblied in the ladder hole section big Fixation shaft part and gap in diameter section are installed in the path section of the ladder hole section and are used to valve ball pushing away ball seat pushing tow The mandril section of valve ball, the shear pin grafting recess portion are arranged on the fixed shaft part.
7. Operating Pressure blowout prevention valve according to claim 6, it is characterised in that: on the valve ball in the top connection Side is equipped with baffle of porous baffle.
CN201820802661.XU 2018-05-28 2018-05-28 A kind of Operating Pressure blowout prevention valve Active CN208816087U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820802661.XU CN208816087U (en) 2018-05-28 2018-05-28 A kind of Operating Pressure blowout prevention valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820802661.XU CN208816087U (en) 2018-05-28 2018-05-28 A kind of Operating Pressure blowout prevention valve

Publications (1)

Publication Number Publication Date
CN208816087U true CN208816087U (en) 2019-05-03

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Application Number Title Priority Date Filing Date
CN201820802661.XU Active CN208816087U (en) 2018-05-28 2018-05-28 A kind of Operating Pressure blowout prevention valve

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110449823A (en) * 2019-07-31 2019-11-15 中国航发沈阳发动机研究所 A kind of casting assembled method for blocking

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110449823A (en) * 2019-07-31 2019-11-15 中国航发沈阳发动机研究所 A kind of casting assembled method for blocking

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