CN216780417U - Pressure relief control device for oil field well head - Google Patents
Pressure relief control device for oil field well head Download PDFInfo
- Publication number
- CN216780417U CN216780417U CN202220347480.9U CN202220347480U CN216780417U CN 216780417 U CN216780417 U CN 216780417U CN 202220347480 U CN202220347480 U CN 202220347480U CN 216780417 U CN216780417 U CN 216780417U
- Authority
- CN
- China
- Prior art keywords
- wellhead
- pressure relief
- wall
- valve plate
- control device
- 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.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a pressure relief control device for an oil field wellhead, which comprises a wellhead connecting device and a wellhead valve plate perforating device; the wellhead connecting device is fixedly connected with a wellhead; the wellhead valve plate perforating device is connected to the wellhead connecting device; the wellhead valve plate perforating device is provided with a perforating end, and the perforating end faces to the valve plate inside the wellhead. The utility model can safely and reliably release the pressure of the oil-water well and install a new valve, so that the wellhead device recovers the normal control work force, conditions are created for workover without pressure, the construction is simple, the time and the labor are saved, and the construction cost is saved.
Description
Technical Field
The utility model relates to the field of control equipment of an oil field wellhead device, in particular to a pressure relief control device for an oil field wellhead.
Background
All there is the valve on the equipment such as production tree, water injection well, the steam injection well in oil field, be the passageway between well and the ground, some can appear the condition that the valve plate drops in these valves use, appear behind the condition that the valve plate drops, the valve plate can not be opened when the hand wheel of operation valve is liberated, can not form with the passageway on ground in the well, because there is pressure in the well, the valve can not be opened, pressure in the well can not release, can't dismantle wellhead assembly when needing to carry out workover. In order to disassemble the wellhead device for well repair after the valve plate falls off, the wellhead device can be disassembled for operation only after the pressure of a shaft fluid column is higher than the formation pressure by adopting a high-density well killing hydraulic well method and the wellhead pressure is reduced to be below 0 MPa. On one hand, the method is time-consuming and labor-consuming, needs a plurality of devices and a large amount of well killing fluid, and has high construction cost and long construction time; on the other hand, the pressure formed at the bottom of the well after the high-density well killing fluid enters the shaft is more than 5 percent higher than the pressure of the stratum, the pressure balance is difficult to control, the high-density well killing fluid easily enters the stratum, the pollution is caused to the stratum, the seepage passage of the stratum is blocked, and the constructed oil-water well cannot normally produce.
In order to solve the problems, technicians invent the valve replacing device under pressure, such as Chinese patents: 2013206943043A pressure-changing valve device, which is to automatically expand by slips to block the channel of the wellhead device before the valve after safety seat sealing, and then change the valve, but the device can not ensure 100% reliability, and fix the sealing rubber cylinder by the inverted teeth on the slips, if the slips are not reliably anchored, blowout will occur, and very serious accident will be generated.
Publication (bulletin) No.: CN108775230A, publication (public notice) day: 2018-11-09, which relates to an oil wellhead pressure relief device, comprising a box body, wherein the bottom of the box body is connected with a flange plate, one side of the box body is connected with an oil pipe, one side of the oil pipe is connected with a rotary switch, one side of the rotary switch is provided with a pressure relief oil tank, the inner cavity of the box body is provided with a pressure gauge, a first-level oil tank is arranged above the pressure gauge, the pressure gauge monitors the pressure in the inner cavity of the box body in real time, when the pressure gauge monitors that the pressure is too large, an electronic valve is opened, a part of crude oil is drained to the first-level oil tank, when a liquid level gauge of the first-level oil tank monitors that the liquid level rises to an alarm height, a buzzer alarms to remind a worker to open the rotary switch, the oil is released to the pressure relief oil tank, the pressure of a wellhead is reduced, the electronic valve is opened, the crude oil is drained to a second-level oil tank, and the worker can sample by grades through sampling pipes on one side of the first-level oil tank and the second-level oil tank, to monitor the oil composition to determine if a problem occurs within the well.
Publication (bulletin) No.: CN113494260A, publication (public notice) day: 2021-10-12 discloses a blowout prevention device for a thermal recovery wellhead, a first seal sleeve is provided with a first support flange; the inner profile surface of the sealing main body is provided with a first groove for embedding the first supporting flange and a second groove for embedding the second sealing sleeve, the sealing main body is provided with external threads, so that the sealing main body is fixed on the first sealing sleeve and the second sealing sleeve, a cavity is formed between the sealing main body and the polish rod, the first packing is arranged in the cavity at the upper part of the first sealing sleeve, and the second packing is arranged in the cavity between the first sealing sleeve and the second sealing sleeve; the sealing main body is provided with a glue injection hole at the position of the second packing, and a plugging device is arranged corresponding to the glue injection hole; the oil pumping device has the advantages that the structure is simple, the sealing performance is reliable, the second packing is sealed by glue injection, the temperature and pressure bearing load can be improved, the pressure bearing load of the first packing is reduced, the first packing is quickly replaced or a wellhead device is overhauled under a controllable state, pollution discharge and emptying are not needed, and safe, efficient, environment-friendly and energy-saving production of oil pumping operation is realized.
Publication (bulletin) No.: CN111535772A, publication (public notice) day: 2020-08-14 relates to an anti-overflow control system for a drilling wellhead, which comprises a semi-sealed big and small valve core double gate plate, a fully-sealed single gate plate and an annular blowout preventer which are positioned on a main four-way of the wellhead, wherein the top of the annular blowout preventer is connected with an anti-overflow pipe; the right side of the main four-way of the wellhead is connected with a blowout manifold, the outlet of the blowout manifold is connected with a throttle manifold, and the inlet of the throttle manifold is provided with a blowout flat valve; the left side of the main four-way of the wellhead is connected with a reverse circulation manifold; the semi-closed blowout preventer is a double-ram blowout preventer consisting of a semi-closed large valve core ram and a semi-closed small valve core ram, the large valve core ram and the small valve core ram are controlled by large and small valve core hydraulic rotary valves, and operating handles of the large and small valve core rams are connected with piston rods of semi-closed cylinders; compressed air is respectively connected with a first blowout pneumatic control valve, an annular pneumatic control valve and a P port of a pneumatic control valve with a semi-sealed large valve core and a semi-sealed small valve core; the port A of the pneumatic control valve of the semi-sealed large valve core and the port A of the pneumatic control valve of the semi-sealed small valve core are connected with the air port of the upper cavity of the pneumatic cylinder of the semi-sealed large valve core and the pneumatic cylinder of the semi-sealed small valve core through the shuttle valve of the semi-sealed large valve core and the shuttle valve of the semi-sealed small valve core. The device can realize soft well shut-in aiming at drilling tools with different specifications in the well.
The technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, and no technical inspiration exists in the above-disclosed technical documents for more technical features, technical problems to be solved, and advantageous effects thereof.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a pressure relief control device for an oil field wellhead, which can safely and reliably release the pressure of an oil-water well and then install a new valve, so that the wellhead returns to normal control force, creates conditions for workover without pressure, and is simple in construction, time-saving, labor-saving and construction cost-saving.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a pressure relief control device for an oil field wellhead comprises a wellhead connecting device and a wellhead valve plate perforating device;
the wellhead connecting device is fixedly connected with a wellhead;
the wellhead valve plate perforating device is connected to the wellhead connecting device;
the wellhead valve plate perforating device is provided with a perforating end, and the perforating end faces to the valve plate inside the wellhead.
Further, the wellhead connection device comprises a connecting body;
the left end of the connector is provided with a clamp connector connected with a wellhead device.
Furthermore, the side wall of the connector is provided with a pressure release opening, and the outer end of the pressure release opening is provided with a clamp connector.
Further, the hole opening device for the wellhead valve plate comprises a drill bit, a top shaft and a sealing pipe;
the left end of the sealing tube is connected with the right end of the connecting body;
the top shaft penetrates through the sealing pipe;
the drill bit is connected and fixed at the left end of the jacking shaft, and the drill bit can enter the well bore through the inner cavity of the connecting body under the driving of the jacking shaft.
Further, the wellhead valve plate hole opening device further comprises a sealing mechanism;
the sealing mechanism is arranged between the inner wall of the sealing pipe and the outer wall of the top shaft.
Further, the sealing mechanism comprises a sealing element and a pressing cap;
the sealing piece is arranged on the inner wall of the sealing tube and is pressed by the pressing cap.
Further, the wellhead valve plate hole opening device further comprises a top sleeve;
the outer wall of the jacking sleeve is in threaded connection with the inner wall of the right end opening of the sealing pipe, and the inner wall of the jacking sleeve is in threaded connection with the outer wall of the jacking shaft.
Furthermore, the inner wall of the top sleeve and the outer wall of the top shaft are provided with corresponding axial limiting tables.
Furthermore, a rotating wheel is arranged on the outer wall of the right end of the top sleeve;
and a top rotating wheel is arranged on the outer wall of the right end of the top shaft.
Furthermore, the swiveling wheel is connected with the top sleeve fixedly through a limit pin, and the top swiveling wheel is connected with the top shaft fixedly through an anti-disengaging pin.
Compared with the prior art, the utility model has the following beneficial effects:
the left end clamp connector of the connector can be connected with a valve on a wellhead device, so that the tip end of a drill bit is abutted against a fallen valve plate, the valve plate can be drilled through by rotating the jacking runner, a channel is built between the well and the ground, high-pressure liquid in the well is discharged through the pressure discharge port, the pressure in the well is released, the wellhead valve can be detached to replace a new valve when the wellhead pressure is 0, and the wellhead device recovers functions to meet the requirements of well repairing operation.
Drawings
Fig. 1 is a schematic structural diagram of a pressure relief control device for an oilfield wellhead according to the present invention.
Reference numerals: the drill bit 1, a connector 2, a top shaft 3, a pressing cap 4, a sealing element 5, a sealing tube 6, a top sleeve 7, a rotating wheel 8, a limiting pin 9, a top rotating wheel 10 and an anti-falling pin 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1, the present embodiment provides a pressure relief control device for an oilfield wellhead, which includes a wellhead connection device, a wellhead valve plate opening device;
the wellhead connecting device is fixedly connected with a wellhead;
the wellhead valve plate perforating device is connected to the wellhead connecting device;
the wellhead valve plate perforating device is provided with a perforating end, and the perforating end faces to the valve plate inside the wellhead.
Further, the wellhead connection device comprises a connecting body;
the left end of the connector is provided with a clamp connector connected with a wellhead device.
Furthermore, the side wall of the connector is provided with a pressure release opening, and the outer end of the pressure release opening is provided with a hoop connector.
Further, the hole opening device for the wellhead valve plate comprises a drill bit, a top shaft and a sealing pipe;
the left end of the sealing tube is connected with the right end of the connecting body;
the top shaft penetrates through the sealing pipe;
the drill bit is connected and fixed at the left end of the jacking shaft, and the drill bit can enter the well mouth through the inner cavity of the connector under the driving of the jacking shaft.
Further, the wellhead valve plate hole opening device further comprises a sealing mechanism;
the sealing mechanism is arranged between the inner wall of the sealing pipe and the outer wall of the top shaft.
Further, the sealing mechanism comprises a sealing element and a pressing cap;
the sealing piece is arranged on the inner wall of the sealing tube and is pressed by the pressing cap.
Further, the wellhead valve plate hole opening device further comprises a top sleeve;
the outer wall of the jacking sleeve is in threaded connection with the inner wall of the right end opening of the sealing pipe, and the inner wall of the jacking sleeve is in threaded connection with the outer wall of the jacking shaft.
Furthermore, the inner wall of the top sleeve and the outer wall of the top shaft are provided with corresponding axial limiting tables.
Furthermore, a rotating wheel is arranged on the outer wall of the right end of the top sleeve;
and a top rotating wheel is arranged on the outer wall of the right end of the top shaft.
Further, the swiveling wheel is fixedly connected with the ejection sleeve through a limiting pin, and the ejection swiveling wheel is fixedly connected with the ejection shaft through an anti-dropping pin.
As shown in figure 1, the embodiment of the utility model comprises a drill bit 1, a connecting body 2, a top shaft 3, a pressing cap 4, a sealing element 5, a sealing pipe 6, a top sleeve 7, a rotating wheel 8, a limit pin 9, a top rotating wheel 10 and an anti-falling pin 11, wherein the top shaft 3 passes through the sealing pipe 6 in series, the sealing element 5 is installed in the left end of the sealing pipe 6, the pressing cap 4 is sleeved on the top shaft 3 and then is connected with the left end internal thread of the sealing pipe 6, the pressing cap 4 presses the sealing element 5 to enable the sealing element 5 to be compressed and deformed to contain the top shaft 3, so that fluid at the left end of the pressing cap 4 cannot leak to the right end of the sealing pipe 6, the right end of the connecting body 2 is connected with the left end external thread of the sealing pipe 6, the connection position keeps sealing, the left end of the connecting body 2 is provided with a clamp connector connected with a wellhead device, the clamp connector can be connected with a valve on the wellhead device, the right end of the drill bit 1 is connected with the left end of the top shaft 3, the left end of the drill bit 1 is provided with a pointed top structure, the left end screw thread of the top sleeve 7 is screwed with the screw thread at the right end of the sealing tube 6 after the top sleeve 7 is sleeved on the top shaft 3, the inner diameter of the left end of the top sleeve 7 is smaller than the diameter of the left end of the top shaft 3, the left end surface of the top sleeve 7 can prop against the shoulder surface of the top shaft 3, the top shaft 3 can move rightwards by rotating the top sleeve 7, the internal thread of the top sleeve 7 is screwed with the screw thread at the right part of the top shaft 3, and the drill bit 1 can be driven to rotate and walk leftwards by rotating the top shaft 3.
The side wall of the connector 2 is provided with a pressure release port 2-1, the outer end of the pressure release port 2-1 is provided with a hoop connector, and the hoop connector can be connected with a valve.
The rotating wheel 8 is installed at the right end of the top sleeve 7, the rotating wheel 8 is connected with the top sleeve 7 in a plug-in mode, the top sleeve 7 can be driven to rotate when the rotating wheel 8 rotates, the rotating wheel 8 is connected to the top sleeve 7 through a limiting pin 9, the rotating wheel 8 cannot move axially on the top sleeve 7, and the rotating wheel 8 is prevented from falling off from the top sleeve 7.
The right end of apical axis 3 is installed and is pushed away runner 10, pushes away runner 10 and is connected with apical axis 3 plug-in type, can drive apical axis 3 rotatory when pushing away runner 10 rotatory, pushes away runner 10 and connects on apical axis 3 by anticreep pin 11, makes and pushes away runner 10 and can not axial displacement on apical axis 3, prevents to push away runner 10 and drops from going off from apical axis 3.
The left end clamp connector of the connector 2 can be connected with a valve on a well head device, the tip of the drill bit 1 is pushed against a fallen valve plate, the drill bit 1 is made to gradually drill into the valve plate, after the drilling force between the drill bit 1 and the valve plate is reduced after one step of drilling, the rotating wheel 8 is rotated again, the left end of the jacking sleeve 7 is made to jack the jacking shaft 3, the jacking force between the drill bit 1 and the valve plate is increased, the valve plate can be drilled through by the drill bit 1 after multiple operations, a pressure relief channel is built between the well and the ground, high-pressure liquid in the well is made to flow through a pressure relief port and discharged, the pressure in the well is made to be released, the well head valve can be detached to replace a new valve when the well head pressure is 0, and the well head device can recover functions to meet the requirements of well repair operation. The valve is arranged on the clamp connecting head on the side surface of the connecting body 2, so that the pressure in the well can be controlled to be released, and the control failure is prevented.
The utility model relates to a control device of an oil field wellhead device, which is a device designed for releasing the pressure in a well after a valve plate of a valve on the oil-water well wellhead device falls off, and is a pressure release control device for the oil field wellhead. The utility model can reach the design requirement, overcomes the problems in the prior art, has simple construction, saves time and labor, saves construction cost and has obvious economic benefit and social benefit.
Example 2:
as shown in fig. 1, the present embodiment provides a pressure relief control device for an oilfield wellhead, which includes a wellhead connection device, a wellhead valve plate opening device;
the wellhead connecting device is fixedly connected with a wellhead;
the wellhead valve plate perforating device is connected to the wellhead connecting device;
the wellhead valve plate perforating device is provided with a perforating end which faces the valve plate inside the wellhead.
Further, the wellhead connection device comprises a connecting body;
the left end of the connector is provided with a clamp connector connected with a wellhead device.
Furthermore, the side wall of the connector is provided with a pressure release opening, and the outer end of the pressure release opening is provided with a clamp connector.
Further, the hole opening device for the wellhead valve plate comprises a drill bit, a top shaft and a sealing pipe;
the left end of the sealing tube is connected with the right end of the connecting body;
the top shaft penetrates through the sealing pipe;
the drill bit is connected and fixed at the left end of the jacking shaft, and the drill bit can enter the well mouth through the inner cavity of the connector under the driving of the jacking shaft.
Further, the wellhead valve plate hole opening device further comprises a sealing mechanism;
the sealing mechanism is arranged between the inner wall of the sealing pipe and the outer wall of the top shaft.
Further, the sealing mechanism comprises a sealing element and a pressing cap;
the sealing piece is arranged on the inner wall of the sealing tube and is pressed by the pressing cap.
Example 3:
as shown in fig. 1, the present embodiment provides a pressure relief control device for an oilfield wellhead, which includes a wellhead connection device, a wellhead valve plate hole opening device;
the wellhead connecting device is fixedly connected with a wellhead;
the wellhead valve plate perforating device is connected to the wellhead connecting device;
the wellhead valve plate perforating device is provided with a perforating end, and the perforating end faces to the valve plate inside the wellhead.
Further, the wellhead connection device comprises a connecting body;
the left end of the connector is provided with a clamp connector connected with a wellhead device.
Furthermore, the side wall of the connector is provided with a pressure release opening, and the outer end of the pressure release opening is provided with a clamp connector.
Further, the hole opening device for the wellhead valve plate comprises a drill bit, a top shaft and a sealing pipe;
the left end of the sealing tube is connected with the right end of the connecting body;
the top shaft penetrates through the sealing pipe;
the drill bit is connected and fixed at the left end of the jacking shaft and can enter the well bore through the inner cavity of the connecting body under the driving of the jacking shaft
Although fig. 1 is used in all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as parts or structural features missing from the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiment with more components is only the best embodiment, and the embodiment with less components is the basic embodiment, but the basic object of the utility model can also be achieved, so all the modified embodiments are within the protection scope of the utility model.
All parts and components which are not discussed in the present application and the connection mode of all parts and components in the present application belong to the known technology in the technical field. The application is direct, and is not described in detail.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pressure relief control device for an oil field wellhead is characterized by comprising a wellhead connecting device and a wellhead valve plate hole opening device;
the oilfield wellhead connecting device is fixedly connected with a wellhead;
the oil field wellhead valve plate tapping device is connected to the wellhead connecting device;
the oil field wellhead valve plate perforating device is provided with a perforating end, and the perforating end faces to a valve plate inside a wellhead.
2. The pressure relief control device for an oilfield wellhead according to claim 1, wherein the wellhead connection device comprises a connecting body;
the left end of the connector is provided with a clamp connector connected with a wellhead device.
3. The pressure relief control device for the oilfield wellhead as claimed in claim 2, wherein the side wall of the connecting body is provided with a pressure relief opening, and a clamp connector is arranged at the outer end of the pressure relief opening.
4. The pressure relief control device for the oil field wellhead according to claim 2 or 3, characterized in that the wellhead valve plate hole opening device comprises a drill bit, a top shaft and a sealing pipe;
the left end of the sealing tube is connected with the right end of the connecting body;
the top shaft penetrates through the sealing pipe;
the drill bit is connected and fixed at the left end of the jacking shaft, and the drill bit can enter the well mouth through the inner cavity of the connector under the driving of the jacking shaft.
5. The pressure relief control device for an oilfield wellhead according to claim 4, wherein the wellhead valve plate opening device further comprises a sealing mechanism;
the sealing mechanism is arranged between the inner wall of the sealing pipe and the outer wall of the top shaft.
6. The pressure relief control device for an oilfield wellhead according to claim 5, wherein the sealing mechanism comprises a seal, a pressure cap;
the sealing piece is arranged on the inner wall of the sealing tube and is pressed by the pressing cap.
7. The pressure relief control device for the wellhead of the oilfield according to claim 5 or 6, wherein the wellhead valve plate hole opening device further comprises a top sleeve;
the outer wall of the jacking sleeve is in threaded connection with the inner wall of the right end opening of the sealing pipe, and the inner wall of the jacking sleeve is in threaded connection with the outer wall of the jacking shaft.
8. The pressure relief control device for the oilfield wellhead as claimed in claim 7, wherein the inner wall of the top sleeve and the outer wall of the top shaft are provided with corresponding axial limiting platforms.
9. The pressure relief control device for the oilfield wellhead according to claim 7, wherein a rotating wheel is mounted on the outer wall of the right end of the top sleeve;
and a top rotating wheel is arranged on the outer wall of the right end of the top shaft.
10. The pressure relief control device for the oilfield wellhead as claimed in claim 9, wherein the rotating wheel is fixedly connected with the top sleeve through a limiting pin, and the top rotating wheel is fixedly connected with the top shaft through an anti-dropping pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220347480.9U CN216780417U (en) | 2022-02-21 | 2022-02-21 | Pressure relief control device for oil field well head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220347480.9U CN216780417U (en) | 2022-02-21 | 2022-02-21 | Pressure relief control device for oil field well head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216780417U true CN216780417U (en) | 2022-06-21 |
Family
ID=82017416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220347480.9U Active CN216780417U (en) | 2022-02-21 | 2022-02-21 | Pressure relief control device for oil field well head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216780417U (en) |
-
2022
- 2022-02-21 CN CN202220347480.9U patent/CN216780417U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208502721U (en) | Coiled tubing complex function double ram type preventer | |
| CN108119083B (en) | Hydraulic drive well head oil pipe cutting knife | |
| CN216780417U (en) | Pressure relief control device for oil field well head | |
| CN2512899Y (en) | High pressure oil-gas water well operation device with pressure | |
| CN202510087U (en) | Retrievable subsurface safety valve | |
| CN110513070B (en) | Flap type downhole oil pipe hydraulic control blowout preventer | |
| CN111411914B (en) | Blowout prevention blanking plug for shaft | |
| CN110185407B (en) | Gas injection wellhead device with safety valve and control system | |
| CN216588534U (en) | Mechanical expansion seal releasable fishing spear blanking plug | |
| CN217925778U (en) | Novel transmission logic's VR is stifled to send and is got instrument | |
| CN201306119Y (en) | Pressurized petroleum wellhead driller | |
| CN114109291B (en) | Low-profile anti-top anti-torsion pressurizing clamping device and method | |
| CN212671709U (en) | Reverse well-backwashing oil drainage tool | |
| CN109138892A (en) | High pressure shut-in well oil-water well punching device under pressure and plugging holes device | |
| CN214576889U (en) | Wellhead blowout prevention packer | |
| CN113153192B (en) | Hydraulic claw tool for preventing drill jamming and blocking | |
| CN202064883U (en) | Perfusion packer | |
| CN200978648Y (en) | Combined type oil line plugging device | |
| CN208816071U (en) | A kind of high pressure shut-in well oil-water well punching device under pressure | |
| RU2563845C2 (en) | Sealing method of cavity of pipes and annular space of well; pgu-2 anti-syphonage sealing device; pk-1 washing coil | |
| CN114439410A (en) | Wellhead blowout prevention packer and using method thereof | |
| CN202578615U (en) | Annular pressure monitoring sealing device for geological drilling | |
| CN215761593U (en) | Leakage control device for wellhead | |
| CN215672101U (en) | Wellhead gate valve replacing device under pressure | |
| CN216477248U (en) | Oil pipe blanking plug |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |