CN215565858U - Underground gas injection safety valve - Google Patents
Underground gas injection safety valve Download PDFInfo
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- CN215565858U CN215565858U CN202121883955.8U CN202121883955U CN215565858U CN 215565858 U CN215565858 U CN 215565858U CN 202121883955 U CN202121883955 U CN 202121883955U CN 215565858 U CN215565858 U CN 215565858U
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- valve
- sliding sleeve
- gas injection
- switching mechanism
- injection safety
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
A downhole gas injection safety valve comprising: a valve housing; the sliding sleeve switching mechanism comprises an inner sliding sleeve and an outer sliding sleeve, the inner sliding sleeve is arranged in the outer sliding sleeve, an outer fluid passage is arranged on the outer sliding sleeve, an inner fluid passage matched with the outer fluid passage is arranged on the inner sliding sleeve, and the inner fluid passage respectively has an opening position and a closing position relative to the outer fluid passage; one end of the outer sliding sleeve is connected with the valve shell; the metal valve clack switching mechanism is arranged at the other end of the valve shell and is connected with the sliding sleeve switching mechanism through a valve push cylinder, the valve push cylinder is positioned in the valve shell, and the metal valve clack switching mechanism is respectively provided with a valve clack opening position and a valve clack closing position and is synchronously opened or closed with the sliding sleeve switching mechanism; the reset mechanism is arranged in the valve shell corresponding to the metal valve clack switching mechanism; and the control mechanism is connected with the sliding sleeve switching mechanism and is connected with the ground control panel through a hydraulic control pipeline.
Description
Technical Field
The utility model relates to special equipment for petroleum drilling and production, in particular to an underground gas injection safety valve for a well cementing and completing tool.
Background
The gas lift oil extraction has the advantages of wide yield regulation range and simple operation, is suitable for wells with corrosive media in high gas-oil ratio wells, directional wells and well fluids, and is characterized in that a plurality of gas injection valves are connected into a pipe column in conventional gas lift production, then gas is injected from the annular space of a casing, and the gas is injected into an oil pipe from the gas injection valves, so that the density and viscosity of fluid are reduced, and the gas injection artificial lift is realized.
Among the prior art's gas lift equipment, there is not the packer gas injection valve tubular column upper end, has gas injection well control problem on the gas injection tubular column, increases well control risk. The conventional cable packer air release valve has a small channel, and is difficult to meet the requirement of gas injection quantity, and meanwhile, the conventional air release valve does not have a good air sealing effect. Therefore, the conventional cable-passing packer and air release valve are difficult to meet the requirements of well control and large-displacement gas injection of the gas injection well.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a downhole gas injection safety valve aiming at the defects in the prior art.
In order to achieve the above object, the present invention provides a downhole gas injection safety valve, which is installed on a packer and connected to an oil pipe, the downhole gas injection safety valve comprising:
a valve housing;
the sliding sleeve switching mechanism comprises an inner sliding sleeve and an outer sliding sleeve, the inner sliding sleeve is arranged in the outer sliding sleeve, an outer fluid passage is arranged on the outer sliding sleeve, an inner fluid passage matched with the outer fluid passage is arranged on the inner sliding sleeve, and the inner fluid passage respectively has an opening position and a closing position relative to the outer fluid passage; one end of the outer sliding sleeve is connected with the valve shell;
the metal valve clack switching mechanism is arranged at the other end of the valve shell and is connected with the sliding sleeve switching mechanism through a valve push cylinder, the valve push cylinder is positioned in the valve shell, and the metal valve clack switching mechanism is respectively provided with a valve clack opening position and a valve clack closing position and is synchronously opened or closed with the sliding sleeve switching mechanism;
the reset mechanism is arranged in the valve shell corresponding to the metal valve clack switching mechanism; and
and the control mechanism is connected with the sliding sleeve switching mechanism and is connected with the ground control panel through a hydraulic control pipeline.
The downhole gas injection safety valve described above, wherein the control mechanism comprises:
the upper joint is connected with the top end of the outer sliding sleeve;
one end of the pipeline joint is arranged on the upper joint, and the other end of the pipeline joint is connected with the hydraulic control pipeline; and
the piston rod is installed in the upper joint, one end of the piston rod is arranged in a hydraulic channel in the upper joint, the piston rod can be pushed by increasing hydraulic pressure, and the other end of the piston rod is connected with the inner sliding sleeve.
In the above downhole gas injection safety valve, the other end of the piston rod is connected to the inner sliding sleeve through a connecting cover.
The downhole gas injection safety valve described above, wherein the metal flap switching mechanism comprises:
the valve seat is arranged at the bottom end of the valve shell;
the self-balancing valve is arranged at the bottom of the valve seat and is opened and closed corresponding to the opening position and the closing position of the sliding sleeve opening and closing mechanism respectively;
a valve flap mounted at a bottom end of the valve seat corresponding to the self-balancing valve, the valve flap having a valve open position and a valve closed position relative to the valve seat, respectively, the valve open position and the valve closed position being synchronized with the opening and closing of the self-balancing valve, respectively; and
the resetting piece is arranged corresponding to the valve clack and used for resetting the valve clack.
In the above safety valve for downhole gas injection, the reset member is a plate spring, one end of the plate spring is mounted on the valve seat, and the other end of the plate spring is abutted to the fixed end of the valve clack.
The above-mentioned downhole gas injection relief valve, wherein, the metal valve clack on-off mechanism still includes:
the lower joint is connected with the bottom end of the valve shell, and the valve seat, the plate spring, the self-balancing valve and the valve clack are all located in a cavity of the lower joint.
In the above downhole gas injection safety valve, when the valve flap is located at the valve closing position, a metal-to-metal seal is formed between the valve flap and the valve seat.
The above-mentioned safety valve for downhole gas injection, wherein the reset mechanism includes an upper spring seat, a reset spring and a lower spring seat, the upper spring seat is sleeved outside the valve push cylinder and abuts against the bottom end of the outer slide sleeve, the lower spring seat is sleeved outside the valve push cylinder and abuts against the boss of the valve housing, and two ends of the reset spring abut against the upper spring seat and the lower spring seat respectively.
In the above downhole gas injection safety valve, an upper sealing element and a lower sealing element are respectively arranged between the outer sliding sleeve and the inner sliding sleeve.
In the above downhole gas injection safety valve, the top end of the upper joint is further provided with a protective cap, and the protective cap is provided with a pipeline crossing joint.
The utility model has the technical effects that:
the downhole gas injection safety valve is suitable for conventional oil and gas reservoir well completion and high-pressure oil and gas reservoir well completion, is combined with a production packer and is arranged at the upper end of a gas injection pipe column, so that the functions of high-dose gas injection and related gas injection annular well control can be better realized. The gas injection relief valve in pit adopts sliding sleeve and relief valve metal to combine together metal seal structure, and the gas injection process does not form the terminal surface and dams, can not increase the gas injection and rub and hinder, can form effective sealing after closing the gas injection valve, ensures gastightness, and no leakage has reduced gas lift well accuse risk, and simple structure is compact, convenient operation, operation safety.
The utility model is described in detail below with reference to the drawings and specific examples, but the utility model is not limited thereto.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of an embodiment of the utility model illustrating an unopened downhole gas injection safety valve;
FIG. 3 is a schematic diagram illustrating an open state of a downhole gas injection safety valve according to an embodiment of the present invention;
FIG. 4 is a schematic view of the installation position of the gas injection safety valve on the packer according to an embodiment of the present invention;
fig. 5 is a schematic diagram of the operation of an embodiment of the present invention.
Wherein the reference numerals
100 underground gas injection safety valve
1 pipeline crossing joint
2 protective cap
3 pipeline joint
4 piston rod
5 Upper joint
6 connecting cover
7 inner sliding sleeve
8 outer sliding sleeve
9 Upper sealing piece
10 lower sealing piece
11 valve push cylinder
12 upper spring seat
13 valve casing
14 return spring
15 lower spring seat
16 valve seat
17 reset piece
18 self-balancing valve
19 valve clack
20 lower joint
21 hydraulic control pipeline
22 oil pipe
23 packer
24 casing
Detailed Description
The utility model will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the present invention. The downhole gas injection safety valve 100 of the present invention is mounted on a packer 23 and connected to a tubing 22, the packer 23 being mounted in a casing 24, the downhole gas injection safety valve 100 comprising: a valve housing 13; the sliding sleeve switching mechanism comprises an inner sliding sleeve 7 and an outer sliding sleeve 8 which are mutually matched, wherein the inner sliding sleeve 7 is arranged in the outer sliding sleeve 8, an outer fluid passage B is arranged on the outer sliding sleeve 8, an inner fluid passage A matched with the outer fluid passage B is arranged on the inner sliding sleeve 7, and the inner fluid passage A respectively has an opening position and a closing position relative to the outer fluid passage B; one end of the outer sliding sleeve 8 is connected with the valve shell 13, and an upper sealing element 9 and a lower sealing element 10 are respectively arranged between the outer sliding sleeve 8 and the inner sliding sleeve 7; the metal valve clack 19 switching mechanism is arranged at the other end of the valve shell 13 and is connected with the sliding sleeve switching mechanism through a valve push cylinder 11, the valve push cylinder 11 is positioned in the valve shell 13, and the metal valve clack 19 switching mechanism is respectively provided with a valve clack 19 opening position and a valve clack 19 closing position and is synchronously opened or closed with the sliding sleeve switching mechanism; a reset mechanism, which is arranged in the valve shell 13 corresponding to the opening and closing mechanism of the metal valve clack 19; and the control mechanism is connected with the sliding sleeve opening and closing mechanism and is connected with the ground control panel through a hydraulic control pipeline 21.
In this embodiment, the control mechanism includes: the upper joint 5 is connected with the top end of the outer sliding sleeve 8, the top end of the upper joint 5 can be further provided with a protective cap 2, and the protective cap 2 is provided with a pipeline crossing joint 1; a line joint 3, one end of which is mounted on the upper joint 5, and the other end of the line joint 3 is connected with the hydraulic control line 21; and the piston rod 4 is installed in the upper joint 5, one end of the piston rod 4 is arranged in a hydraulic channel in the upper joint 5, and the other end of the piston rod 4 is connected with the inner sliding sleeve 7. Preferably, the other end of the piston rod 4 is connected with the inner sliding sleeve 7 through a connecting cover 6.
The metal flap 19 switching mechanism of the present embodiment includes: a valve seat 16 installed at a bottom end of the valve housing 13; a self-balancing valve 18 installed at the bottom of the valve seat 16 and opened and closed corresponding to the open position and the closed position of the sliding sleeve opening and closing mechanism, respectively; a valve flap 19 mounted at the bottom end of the valve seat 16 corresponding to the self-balancing valve 18, the valve flap 19 having a valve opening position and a valve closing position, respectively, with respect to the valve seat 16, which are synchronized with the opening and closing of the self-balancing valve 18, respectively; and a reset member 17 provided corresponding to the valve flap 19 for resetting the valve flap 19. The return member 17 is preferably a plate spring, one end of which is mounted on the valve seat 16, and the other end of which abuts against a fixed end of the valve flap 19. The metal flap 19 switching mechanism may further comprise: and a lower joint 20 connected with the bottom end of the valve housing 13, wherein the valve seat 16, the plate spring, the self-balancing valve 18 and the valve clack 19 are all positioned in a cavity of the lower joint 20. When the valve flap 19 is in the valve closed position, a metal-to-metal seal is provided between the valve flap 19 and the valve seat 16.
The reset mechanism comprises an upper spring seat 12, a reset spring 14 and a lower spring seat 15, the upper spring seat 12 is sleeved outside the valve push cylinder 11 and abuts against the bottom end of the outer sliding sleeve 8, the lower spring seat 15 is sleeved outside the valve push cylinder 11 and abuts against a boss of the valve shell 13, and two ends of the reset spring 14 abut against the upper spring seat 12 and the lower spring seat 15 respectively.
Referring to fig. 2, fig. 2 is a schematic diagram of an unopened state of the downhole gas injection safety valve 100 according to an embodiment of the utility model. The inner fluid channel A on the inner sliding sleeve 7 is not communicated with the outer fluid channel B on the outer sliding sleeve 8, the channel C of the self-balancing valve 18 is not opened, and the channel D of the valve clack 19 is not opened.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating an open state of the downhole gas injection safety valve 100 according to an embodiment of the utility model. The channel C of the self-balancing valve 18 is opened, the inner fluid channel A on the inner sliding sleeve 7 is communicated with the outer fluid channel B on the outer sliding sleeve 8, the channel D of the valve clack 19 is opened, and fluid flows out of a well bore through the inner fluid channel A/the outer fluid channel B through the channel D of the valve clack 19.
Referring to fig. 4, fig. 4 is a schematic view illustrating an installation position of the gas injection safety valve according to an embodiment of the present invention. The downhole gas injection safety valve 100 of the utility model is arranged on a packer 23, is connected with an oil pipe 22 and is connected to a ground control panel through a hydraulic control pipeline, the hydraulic control pipeline 21 is connected with a top pipeline joint 3 of the gas injection safety valve and is lowered to a preset depth in the well, then the packer 23 is set, the downhole gas injection safety valve 100 is in a closed state, and at the moment, the seal between a valve flap 19 and a valve seat 16 is a metal-to-metal seal.
Referring to fig. 5, fig. 5 is a schematic diagram of the operation of an embodiment of the present invention. When gas injection is needed, pressurization can be carried out through a ground hydraulic control pipeline 21, the piston rod 4 pushes the connecting cover 6 and pushes the inner sliding sleeve 7 and the valve push cylinder 11, when the gas injection valve starts to act, the valve push cylinder 11 can firstly open the self-balancing valve 18 to realize pressure balance between the interior of the gas injection safety valve and the lower end of the valve clack 19, the piston rod 4 continues to push, through force transmission, the valve clack 19 is finally opened, the valve push cylinder 11 is pushed to the bottom of the lower connector 20 and forms metal-to-metal sealing with the lower connector 20, at the moment, the inner sliding sleeve 7 is aligned with the through hole of the outer sliding sleeve 8 to form annular space at the upper end of the packer 23 and annular space at the lower end of the packer 23 to be communicated with each other, and gas injection operation can be carried out by referring to fig. 3. During gas injection, gas is injected from the annular space, enters the annular space at the lower end of the packer 23 through the underground gas injection safety valve 100, and then enters the oil pipe 22 through the underground gas injection safety valve 100 to perform artificial gas lift.
When gas injection is not needed, the pipeline hydraulic pressure can be discharged, the underground gas injection safety valve 100 pushes the valve push cylinder 11, the inner sliding sleeve 7 and the piston rod 4 back to the original position under the action of the spring, the valve clack 19 is automatically closed at the moment, the self-balancing valve 18 is automatically closed under the action of the plate spring, and the pressure at the lower ends of the underground gas injection safety valve 100 and the packer 23 is isolated.
The utility model is suitable for conventional oil and gas reservoir well completion and high-pressure oil and gas reservoir well completion, the gas injection safety valve and the production packer are reasonably combined and are arranged at the upper end of the gas injection pipe column, and the functions of large-dose gas injection and annular well closing can be better realized; the metal that adopts sliding sleeve and relief valve combines together to metal seal structure, and the gas injection process does not form the terminal surface and dams, does not increase the gas injection and rubs and hinders, can form effective seal after closing the well, ensures airtight, and no leakage reduces gas lift well control risk.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A downhole gas injection safety valve mounted on a packer and connected to a tubing, the downhole gas injection safety valve comprising:
a valve housing;
the sliding sleeve switching mechanism comprises an inner sliding sleeve and an outer sliding sleeve, the inner sliding sleeve is arranged in the outer sliding sleeve, an outer fluid passage is arranged on the outer sliding sleeve, an inner fluid passage matched with the outer fluid passage is arranged on the inner sliding sleeve, and the inner fluid passage respectively has an opening position and a closing position relative to the outer fluid passage; one end of the outer sliding sleeve is connected with the valve shell;
the metal valve clack switching mechanism is arranged at the other end of the valve shell and is connected with the sliding sleeve switching mechanism through a valve push cylinder, the valve push cylinder is positioned in the valve shell, and the metal valve clack switching mechanism is respectively provided with a valve clack opening position and a valve clack closing position and is synchronously opened or closed with the sliding sleeve switching mechanism;
the reset mechanism is arranged in the valve shell corresponding to the metal valve clack switching mechanism; and
and the control mechanism is connected with the sliding sleeve switching mechanism and is connected with the ground control panel through a hydraulic control pipeline.
2. The downhole gas injection safety valve of claim 1, wherein the control mechanism comprises:
the upper joint is connected with the top end of the outer sliding sleeve;
one end of the pipeline joint is arranged on the upper joint, and the other end of the pipeline joint is connected with the hydraulic control pipeline; and
and the piston rod is arranged in the upper joint, one end of the piston rod is arranged in the hydraulic channel of the upper joint, and the other end of the piston rod is connected with the inner sliding sleeve.
3. The downhole gas injection safety valve of claim 2, wherein the other end of the piston rod is connected to the inner sliding sleeve by a connecting cap.
4. The downhole gas injection safety valve of claim 1, 2 or 3, wherein the metal clapper switching mechanism comprises:
the valve seat is arranged at the bottom end of the valve shell;
the self-balancing valve is arranged at the bottom of the valve seat and is opened and closed corresponding to the opening position and the closing position of the sliding sleeve opening and closing mechanism respectively;
a valve flap mounted at a bottom end of the valve seat corresponding to the self-balancing valve, the valve flap having a valve open position and a valve closed position relative to the valve seat, respectively, the valve open position and the valve closed position being synchronized with the opening and closing of the self-balancing valve, respectively; and
the resetting piece is arranged corresponding to the valve clack and used for resetting the valve clack.
5. The downhole gas injection safety valve of claim 4, wherein the return member is a leaf spring, one end of the leaf spring being mounted on the valve seat, the other end of the leaf spring abutting against a fixed end of the valve flap.
6. The downhole gas injection safety valve of claim 5, wherein the metal clapper switching mechanism further comprises:
the lower joint is connected with the bottom end of the valve shell, and the valve seat, the plate spring, the self-balancing valve and the valve clack are all located in a cavity of the lower joint.
7. The downhole gas injection safety valve of claim 6, wherein the valve flap is a metal-to-metal seal with the valve seat when the valve flap is in the valve closed position.
8. The downhole gas injection safety valve of claim 4, wherein the return mechanism comprises an upper spring seat, a return spring, and a lower spring seat, the upper spring seat is sleeved outside the valve pusher and abuts against the bottom end of the outer sliding sleeve, the lower spring seat is sleeved outside the valve pusher and abuts against a boss of the valve housing, and two ends of the return spring abut against the upper spring seat and the lower spring seat respectively.
9. The downhole gas injection safety valve of claim 4, wherein an upper seal and a lower seal are disposed between the outer and inner sleeves, respectively.
10. The downhole gas injection safety valve of claim 2 or 3, wherein the top end of the upper connector is further provided with a protective cap, and the protective cap is provided with a pipeline crossing connector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110913141 | 2021-08-10 | ||
| CN2021109131412 | 2021-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215565858U true CN215565858U (en) | 2022-01-18 |
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ID=79835039
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110925322.7A Pending CN115704286A (en) | 2021-08-10 | 2021-08-12 | Underground gas injection safety valve |
| CN202121883955.8U Active CN215565858U (en) | 2021-08-10 | 2021-08-12 | Underground gas injection safety valve |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110925322.7A Pending CN115704286A (en) | 2021-08-10 | 2021-08-12 | Underground gas injection safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN115704286A (en) |
-
2021
- 2021-08-12 CN CN202110925322.7A patent/CN115704286A/en active Pending
- 2021-08-12 CN CN202121883955.8U patent/CN215565858U/en active Active
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| Publication number | Publication date |
|---|---|
| CN115704286A (en) | 2023-02-17 |
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