CN220979447U - Wellhead anti-theft device - Google Patents

Abstract

The utility model discloses a wellhead anti-theft device, which comprises an burglar alarm and an unlocking device; the burglar alarm is arranged between the valve and the wellhead casing pipe and is used for blocking oil gas and preventing the oil gas from being left; the unlocking device is movably connected to the valve and used for releasing the blocking state of the burglar alarm. The burglar alarm comprises a valve seat, a valve cover and a valve core; the unlocking device comprises an outer tube and an adjusting rod; the valve core is arranged in the valve seat, and the valve cover is arranged at the axial front end of the valve seat; the adjusting rod passes through the outer tube. The utility model has simple structure, convenient use, anti-theft concealment and strong anti-theft performance, and can prevent oil theft and gas theft molecules from going down without changing the appearance of the valve and the wellhead of the oil production well and adding any lockset, thereby realizing the on-site anti-theft function of the oil well.

Description

Wellhead anti-theft device

Technical Field

The utility model relates to the technical field of wellhead burglary prevention, in particular to a wellhead burglary prevention device.

Background

The oil extraction and water injection well head of the oil field is generally provided with a pressure gauge for measuring pressure and a valve for sampling, the pressure gauge is used for recording various daily analysis parameters, the currently used sampling valve is a common sampling valve which is not antitheft, some lawless persons in society use the defects of the existing sampling valve, and the oil is directly discharged outside at the sampling valve.

Because the oil field is generally arranged in a remote area, the management difficulty is great, and the theft and the destructive behavior of lawbreakers bring great loss to the production of the oil field for a long time, and also can cause environmental pollution or blowout accidents.

The oil well antitheft measures generally comprise the steps of arranging a monitoring camera at the oil well, periodically inspecting personnel and arranging an antitheft box at the wellhead, but the antitheft measures have certain defects:

1. Because a certain time is needed for monitoring camera shooting and personnel inspection to arrive at the site, the time for illegal molecule oil theft is provided;

2. in the management of long well stopping and abandoned wells, no monitoring and personnel inspection are arranged, so that some illegal molecules steal oil through the long well stopping and abandoned wells;

3. The anti-theft box has a complex structure, a large overall appearance and high use cost, and is difficult to replace after being rusted.

Publication (bulletin) number: CN115898313a discloses an oilfield wellhead protection device. Relates to the technical field of oil-gas well equipment. The anti-theft cover is covered on the upper side of the supporting plate and is formed by welding a blind plate on the upper part of a section of steel pipe, the inner wall of the steel pipe of the anti-theft cover is connected with the supporting plate through a hinge, and the anti-theft cover is connected with the supporting plate through a locking mechanism at the opposite position of the hinge. The invention has the following beneficial effects: the outside of the anti-theft cover is not provided with a prized part, the electric heating wire is heated by special alternating current used by industry, the tin metal block is melted, the locking block moves leftwards under the action of the tension spring to open the anti-theft cover, the tin metal block is replaced when the anti-theft cover is buckled again, the operation is simple, the anti-theft performance is good and is not limited by the time, when an lawless person wants to open the anti-theft cover through a self-made power supply, the anti-theft cover is attempted to be opened by inserting a metal rod into a nylon tube, at the moment, two elastic sheets are in contact with the metal rod, the two conductive sheets 16 are communicated, and the RTU sends an alarm signal so as to be processed in time.

After the county has the technology, a certain time is needed for monitoring camera personnel to check to arrive at the scene, so that the time for illegal molecule oil theft is given.

Publication (bulletin) number: CN116255106a discloses an integrated oil and gas well head device for preventing theft from opening, comprising an installation component, a limiting component and a locking component, wherein the installation component comprises a flange installed on a four-way pipe and a valve sleeve communicated with the flange, the flange is provided with the limiting component, the limiting component comprises a socket formed on the flange and a bolt spliced with the socket, the ball is arranged in the socket, a general tool cannot directly contact with the ball, and further, the surface of the ball is smooth, so that the difficulty of the general tool to drive the ball to rotate is increased; even if the ball can be clamped, the ball is easy to slide due to smooth surface, so that the threaded disc cannot move along the threaded opening, and the unlocking purpose cannot be realized.

The county technical anti-theft box has the advantages of complex structure, larger overall appearance and higher use cost, and the anti-theft box is difficult to replace after being rusted

Publication (bulletin) number: CN114607309B discloses an oil well wellhead anti-theft device, which comprises a connector, the connector upside is equipped with draws the pipe, draw the pipe outside and be equipped with glass external member, glass external member with draw and form the gas storage space between the pipe lateral wall body, the glass external member outside is equipped with the protective housing, be equipped with the oil circuit in the middle of drawing the pipe, oil circuit upside intercommunication is equipped with the pneumatic tank, through setting up drawing pipe, protective housing, glass external member, oil circuit, pneumatic tank etc. oil passage communicates to the external world through oil circuit and communicating pipe, makes things convenient for follow-up sample or detection, when this device runs into powerful the destruction, the protective housing warp extrusion glass external member, and the glass external member is broken and makes pneumatic tank internal pressure unbalanced, utilizes the intercommunication state of pneumatic tank internal pressure difference change switching communicating pipe.

According to the prior art, when the glass tube is detonated to destroy the communication state, oil theft is prevented, and the problem that the glass tube needs to be replaced exists.

In summary, the technical scheme of the above disclosed technology, the technical problems to be solved and the beneficial effects are different from those of the present utility model, and the above disclosed technical documents have no technical teaching for more technical features of the present utility model, the technical problems to be solved and the beneficial effects.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model aims to provide the wellhead anti-theft device, which can prevent oil theft and gas theft molecules from falling under the condition that the appearance of a valve and the wellhead of an oil production well is not changed and any lock is not added, so that the on-site anti-theft of the oil well is realized.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

A wellhead anti-theft device comprises an anti-theft device and an unlocking device; the burglar alarm is arranged between the valve and the wellhead casing pipe and is used for blocking oil gas and preventing the oil gas from being left; the unlocking device is movably connected to the valve and used for releasing the blocking state of the burglar alarm.

The burglar alarm comprises a valve seat, a valve cover and a valve core; the unlocking device comprises an outer tube and an adjusting rod;

the valve core is arranged in the valve seat, and the valve cover is arranged at the axial front end of the valve seat;

The adjusting rod passes through the outer tube.

The valve seat is in a circular cylinder shape, and a circular plugging plate is arranged at the axial rear end of the valve seat;

The sealing plate is provided with a central hole, and the inner wall of the axial front end of the valve seat is provided with an internal thread.

The valve cover is in a circular ring shape, an external thread is arranged on the outer wall of the valve cover, and the valve cover is in threaded connection with the valve seat; the middle part of valve gap axial front end is fixed to be set up the horizontal pole, the slide hole is seted up at the middle part of horizontal pole, slides in the slide hole and sets up the case.

The valve core comprises a valve rod which is in sliding connection with the sliding hole, a valve plate is arranged at the axial rear end of the valve rod, and the diameter of a central opening of the plugging plate is smaller than the outer diameter of the valve plate.

The outside suit spring of valve rod, the axial rear end and the valve block fixed connection of spring, axial front end and valve gap contact.

A baffle is fixedly arranged in the middle of the outer wall of the valve seat, and sealing gaskets are respectively arranged at two ends of the baffle; and a rubber pad is arranged at the axial rear end of the valve plate.

The outer tube is a T-shaped tube and is divided into a horizontal part and a vertical part;

The axial rear end of the outer tube horizontal part is connected with an end cover; the axial front end of the outer tube horizontal part is provided with a mounting plate;

The middle part of the end cover is provided with an adjusting threaded hole, and an adjusting internal thread is connected with an adjusting rod in the adjusting threaded hole.

An adjusting external thread is arranged at the axial rear end of the adjusting rod; the adjusting rod is connected with the end cover through an adjusting external thread;

The diameter of the adjusting rod is smaller than the diameter of the central opening of the plugging plate; the adjusting rod can push the valve plate away from the plugging plate;

The axial rear end of the adjusting rod is further provided with a handle, and the handle is provided with an adjusting hole.

The burglar alarm is made of stainless steel.

Compared with the prior art, the utility model has the following beneficial effects:

the anti-theft lock has the advantages of simple structure, convenient use, anti-theft concealment and strong anti-theft performance, and can prevent oil theft and gas theft molecules from falling under the condition of not changing the appearance of a valve and the wellhead of an oil production well and adding any lock, thereby realizing the anti-theft function of the oil well site.

Drawings

FIG. 1 is a schematic view of a wellhead anti-theft device of the present utility model;

FIG. 2 is a schematic illustration of an embodiment of a wellhead anti-theft device of the present utility model;

FIG. 3 is a schematic cross-sectional view of a wellhead anti-theft device of the present utility model;

FIG. 4 is a schematic diagram of an burglar alarm of the wellhead burglar alarm of the present utility model;

In the figure: 1. an burglar alarm; 2. an unlocking device; 3. a valve seat; 4. a plugging plate; 5. a valve cover; 6. a cross bar; 7. a valve core; 8. a valve stem; 9. a valve plate; 10. a spring; 11. an outer tube; 12. a mounting plate; 13. an end cap; 14. an adjusting rod; 15. an adjustment aperture; 16. a baffle; 20. a valve; 21. wellhead casing.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

Referring to fig. 1 to 4, the wellhead anti-theft device provided by the utility model comprises an anti-theft device 1 and an unlocking device 2, wherein the anti-theft device 1 is arranged between a valve 20 and a wellhead sleeve 21, and the unlocking device 2 is movably connected to the valve 20.

The burglar alarm 1 comprises a valve seat 3, a valve cover 5 and a valve core 7;

the valve seat 3 is in a circular cylinder shape, a circular plugging plate 4 is arranged at the axial rear end of the valve seat 3, and internal threads are arranged on the inner wall of the axial front end of the valve seat 3;

the valve cover 5 is in a circular ring shape, an external thread is arranged on the outer wall of the valve cover 5, and the valve cover 5 is in threaded connection with the valve seat 3; a cross rod 6 is fixedly arranged in the middle of the axial front end of the valve cover 5, a sliding hole is formed in the middle of the cross rod 6, and a valve core 7 is slidably arranged in the sliding hole;

the valve core 7 comprises a valve rod 8 which is in sliding connection with the sliding hole, and a valve plate 9 is arranged at the axial rear end of the valve rod 8.

A baffle 16 is fixedly arranged in the middle of the outer wall of the valve seat 3, two sealing gaskets are respectively arranged at two ends of the baffle 16, the baffle 16 and the sealing gaskets can increase the sealing degree between the valve seat 3 and the valve 20 as well as between the baffle and the wellhead sleeve 21,

The plugging plate 4 is provided with a central opening, and the diameter of the central opening is smaller than the outer diameter of the valve plate 9.

The axial rear end of the valve plate 9 is provided with a rubber pad.

When the anti-theft device is used, all parts of the anti-theft device 1 are assembled, after the assembly is completed, the anti-theft device 1 is placed between the valve 20 and the wellhead sleeve 21, one side of the valve cover 5 of the anti-theft device 1 is close to the wellhead sleeve 21, at the moment, when the valve is opened, the valve core 7 is acted by oil pressure and air pressure in the wellhead sleeve 21 to push the valve plate 9 to be attached to the plugging plate 4, and then the plugging between the wellhead sleeve 21 and the valve is realized, and oil or natural gas in the wellhead sleeve 21 cannot be discharged through the valve 20. Under the condition that the appearance of the valve 20 and the wellhead of the oil production well is not changed and no lock is added, oil and gas molecules are stolen without going down, and the anti-theft function of the oil well site is realized.

All parts of the device are made of 304 stainless steel, and the 304 stainless steel has the advantages of high temperature resistance, acid and alkali resistance and corrosion resistance, and is safe and reliable to use, and rust can not occur even if the device is installed on a long stop well and a waste well for a long time.

The unlocking device 2 comprises a T-shaped outer tube 11, the outer tube 11 is divided into a horizontal part and a vertical part, an external thread is arranged at the axial rear end of the horizontal part of the outer tube 11, the external thread is connected with an end cover 13 in a threaded manner, an adjusting threaded hole is formed in the middle of the end cover 13, and an adjusting internal thread in the adjusting threaded hole is connected with an adjusting rod 14.

An adjusting external thread is arranged at the axial rear end of the adjusting rod 14, and the adjusting rod 14 is in threaded connection with the end cover 13 through the adjusting external thread; the axial rear end of the adjusting rod 14 is also provided with a handle, the movement of the adjusting rod 14 is realized by rotating the handle, the handle is provided with an adjusting hole 15, and the adjusting rod 14 can be adjusted by a tool penetrating the adjusting hole 15, such as a screwdriver, a spanner and the like;

The diameter of the adjusting rod 14 is smaller than the diameter of the central opening of the plugging plate 4, and the valve plate 9 can be propped away from the plugging plate 4 by the adjusting rod 14.

The axial front end of the horizontal part of the outer tube 11 is provided with a mounting plate 12.

When the unlocking device 2 is used, the mounting plate 12 is fixed on the valve 20 through the clamp, after the valve 2 is opened, one end of the adjusting rod 14 is propped against the valve plate 9 through rotating the adjusting rod 14, the valve plate 9 is separated from the plugging plate 4 through continuously rotating the adjusting rod 9, at the moment, the wellhead sleeve 21 is communicated with the valve 20, and petroleum or natural gas in a wellhead is discharged through the vertical part of the outer tube 11.

Example 2:

Referring to fig. 4, on the basis of embodiment 1, a spring 10 is sleeved on the outer side of the valve rod 8, the axial rear end of the spring 10 is fixedly connected with the valve plate 9, and the axial front end is in contact with the valve cover 5.

The spring 10 can enable the valve plate 9 to be always attached to the plugging plate 4, and can ensure that the burglar alarm 1 is always in a closed state when no oil pressure or air pressure exists in the wellhead sleeve 21.

The parts themselves which are not discussed in the application and the connection modes of the parts in the application all belong to the known technology in the technical field. The preparation can be directly applied and is not repeated.

In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 present utility model. In this specification, schematic representations of the above terms 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 of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The wellhead anti-theft device is characterized by comprising an anti-theft device and an unlocking device;

The burglar alarm is arranged between the valve and the wellhead casing pipe and is used for blocking oil gas and preventing the oil gas from being left;

the unlocking device is movably connected to the valve and used for releasing the blocking state of the burglar alarm.

2. The wellhead anti-theft device of claim 1, wherein the anti-theft device comprises a valve seat, a valve cover and a valve core; the unlocking device comprises an outer tube and an adjusting rod;

the valve core is arranged in the valve seat, and the valve cover is arranged at the axial front end of the valve seat;

The adjusting rod passes through the outer tube.

3. The wellhead anti-theft device according to claim 2, wherein the valve seat is in a circular cylinder shape, and an annular plugging plate is arranged at the axial rear end of the valve seat;

The sealing plate is provided with a central hole, and the inner wall of the axial front end of the valve seat is provided with an internal thread.

4. A wellhead anti-theft device according to claim 3, characterized in that the valve cover is in the shape of a ring, the outer wall of the valve cover is provided with external threads, and the valve cover is in threaded connection with the valve seat; the middle part of valve gap axial front end is fixed to be set up the horizontal pole, the slide hole is seted up at the middle part of horizontal pole, slides in the slide hole and sets up the case.

5. The wellhead anti-theft device of claim 4, wherein the valve core comprises a valve rod slidingly connected with the sliding hole, a valve plate is arranged at the axial rear end of the valve rod, and the diameter of the central opening of the plugging plate is smaller than the outer diameter of the valve plate.

6. The wellhead anti-theft device of claim 5, wherein the outer side of the valve rod is sleeved with a spring, the axial rear end of the spring is fixedly connected with the valve plate, and the axial front end of the spring is contacted with the valve cover.

7. The wellhead anti-theft device according to claim 5, characterized in that a baffle is fixedly arranged in the middle of the outer wall of the valve seat, and sealing gaskets are respectively arranged at two ends of the baffle; and a rubber pad is arranged at the axial rear end of the valve plate.

8. A wellhead anti-theft device according to claim 5, characterized in that said outer tube is a "T" tube, said outer tube being divided into a horizontal portion and a vertical portion;

The axial rear end of the outer tube horizontal part is connected with an end cover; the axial front end of the outer tube horizontal part is provided with a mounting plate;

The middle part of the end cover is provided with an adjusting threaded hole, and an adjusting internal thread is connected with an adjusting rod in the adjusting threaded hole.

9. The wellhead anti-theft device of claim 8, wherein an axial rear end of the adjustment rod is provided with an adjustment external thread; the adjusting rod is connected with the end cover through an adjusting external thread;

The diameter of the adjusting rod is smaller than the diameter of the central opening of the plugging plate; the adjusting rod can push the valve plate away from the plugging plate;

The axial rear end of the adjusting rod is further provided with a handle, and the handle is provided with an adjusting hole.

10. A wellhead anti-theft device according to claim 1, characterised in that the burglar alarm is made of stainless steel.