Full-automatic differential pressure type blowout preventer

Abstract

The utility model belongs to the technical field of oil field production equipment, and particularly relates to a full-automatic differential pressure type blowout preventer, which comprises a spherical lower joint, a spherical pressing cap, a spherical sealing gasket, a nylon ball, a main body, a built-in blowout preventer, a spherical packing shell, a conical packing, a packing gasket, a packing pressing cap and an upper gland. The spherical lower joint is mounted on the spherical sealing gasket at the lower end of the main body and is locked and fixed through the spherical pressing cap, and the nylon ball is positioned in an annular cavity at the lower part of the main body; the built-in blowout preventer is positioned in a sealing seat at the upper part of the main body, and the spherical packing shell is mounted on a spherical sealing gasket at the upper end of the main body and is locked and fixed through a spherical pressing cap; the conical packing is filled in a conical ring cavity at the lower part of the spherical packing shell, the packing pad is filled in a ring cavity above the conical packing, the packing pressing cap is positioned above the packing pad, the packing pressing cap is tightly pressed by the upper gland, and the upper gland is in threaded connection with the upper end of the spherical packing shell. The labor and energy consumption are greatly reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of oil field production equipment, and in particular relates to a full-automatic differential pressure well sealing device. Background Art

[0002] There are many kinds of well sealers commonly used in existing oilfield pumping wells. Generally, the packing needs to be replaced when the packing is worn by about 10%, or it cannot be automatically adjusted. When the packing is frequently replaced, the rubber gate well sealer must be closed before operation. Replacing the packing is time-consuming and laborious, which not only wastes manpower, but also increases losses, affecting the production and economic benefits of the oilfield. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a fully automatic differential pressure well sealer. The well sealer is a sealing device that integrates automatic deviation adjustment, automatic inclination adjustment, automatic well sealing and broken rod automatic well sealing. The packing pads need to be replaced only after 100% of the packing pads are used up. And when the packing pads need to be supplemented, just open the upper gland and add them. It greatly reduces labor and energy consumption, improves production efficiency and reduces production costs.

[0004] The technical solution adopted by the utility model is: a fully automatic pressure differential well sealing device, which comprises a spherical lower joint, a spherical pressure cap, a spherical sealing pad, a nylon ball, a main body, a built-in well sealing device, a spherical packing shell, a conical packing, a packing pad, a packing pressure cap and an upper pressure cover.

[0005] The fully automatic differential pressure well sealer is mounted on the bare rod of the oil pump; the spherical lower joint is mounted on the spherical sealing gasket at the lower end of the main body, and is locked and fixed by a spherical pressure cap threadedly connected to the lower end of the main body, and the nylon ball is located in the annular cavity at the lower part of the main body; the built-in well sealer is located in the sealing seat at the upper part of the main body, the spherical packing shell is mounted on the spherical sealing gasket at the upper end of the main body, and is locked and fixed by a spherical pressure cap threadedly connected to the upper end of the main body; the conical packing is filled in the conical annular cavity at the lower part of the spherical packing shell, and the packing pad is filled in the annular cavity above the conical packing, and the packing pressure cap is located above the packing pad, and the packing pressure cap is pressed by the upper pressure cover, and the upper pressure cover is threadedly connected to the upper end of the spherical packing shell.

[0006] Furthermore, the lower part of the spherical lower joint is provided with an external thread.

[0007] Furthermore, six spiral grooves are formed on the inner wall of the ball head of the spherical lower joint.

[0008] Furthermore, the number of the spherical sealing gaskets is two, which are used for sealing the spherical lower joint and the ball head of the spherical packing shell respectively.

[0009] Furthermore, the built-in well plug includes a conical rubber sleeve, a spacer, two retaining rings and a truncated cone rubber sleeve; the conical rubber sleeve and the truncated cone rubber sleeve are respectively located below and above the spacer, and the conical rubber sleeve, the spacer, and the truncated cone rubber sleeve are assembled together through retaining rings and bolts.

[0010] Furthermore, the spherical packing shell consists of a shell and a ball head. The upper part of the shell is provided with an external thread, the length of the external thread is not less than the length of the packing pad filling cavity, and the lower part is a trumpet hole. The ball head is installed on the lower part of the shell through a thread and fixed by welding.

[0011] Furthermore, the upper gland is composed of a threaded sleeve, a turning handle and a pressing ring, the pressing ring is welded to the top of the threaded sleeve, and the turning handle is symmetrically welded to both sides of the threaded sleeve.

[0012] Furthermore, the number of the packing pads is 3-8.

[0013] The beneficial effects of the utility model are as follows: a fully automatic differential pressure well sealer is provided. The well sealer is a sealing device that integrates automatic deviation adjustment, automatic inclination adjustment, automatic well sealing and automatic rod breaking well sealing. The packing pads need to be replaced only after 100% of the packing pads are used up. And when the packing pads need to be replenished, it is only necessary to open the upper pressure cover to add them. Under the action of the pressure difference, the built-in automatic well sealer will automatically seal the wellhead, realizing automatic deviation adjustment and inclination adjustment and automatic well sealing. It greatly reduces labor and energy consumption, improves production efficiency, and reduces production costs. The economic and social benefits are obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of a fully automatic differential pressure well plugging device;

[0015] Figure 2 1 is a schematic diagram of the cross-sectional structure of the spherical lower joint;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the spherical pressure cap;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of a spherical sealing gasket;

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the main body;

[0019] Figure 6 It is a schematic diagram of the cross-sectional structure of the built-in well sealer;

[0020] Figure 7 is a schematic diagram of the cross-sectional structure of the septum;

[0021] Figure 8 yes Figure 7 Left view of

[0022] Fig. 9 It is a top view of the retaining ring;

[0023] Fig.10 It is a schematic diagram of the cross-sectional structure of the spherical packing shell;

[0024] Fig.11 It is a schematic diagram of the cross-sectional structure of the packing gland;

[0025] Fig.12 It is a schematic diagram of the cross-sectional structure of the upper gland.

[0026] In the figure, 1, spherical lower joint, 2, spherical pressure cap, 3, spherical sealing gasket, 4, nylon ball, 5, main body, 6, built-in well sealer, 7, spherical packing shell, 8, conical packing, 9, packing gasket, 10, packing pressure cap, 11, upper pressure cover, 61, conical rubber sleeve, 62, spacer, 63, retaining ring, 64, truncated cone rubber sleeve, 71, shell, 72, ball head, 111, threaded casing, 112, handle, 113, pressure ring. DETAILED DESCRIPTION Example

[0027] Referring to the figures, a fully automatic differential pressure well plugging device includes a spherical lower joint 1, a spherical pressure cap 2, a spherical sealing pad 3, a nylon ball 4, a main body 5, a built-in well plugging device 6, a spherical packing shell 7, a conical packing 8, a packing pad 9, a packing pressure cap 10 and an upper pressure cover 11;

[0028] The fully automatic differential pressure well sealer is mounted on the bare rod of the oil pump; the spherical lower joint is mounted on the spherical sealing gasket at the lower end of the main body, and is locked and fixed by a spherical pressure cap threadedly connected to the lower end of the main body, and the nylon ball is located in the annular cavity at the lower part of the main body; the built-in well sealer is located in the sealing seat at the upper part of the main body, the spherical packing shell is mounted on the spherical sealing gasket at the upper end of the main body, and is locked and fixed by a spherical pressure cap threadedly connected to the upper end of the main body; the conical packing is filled in the conical annular cavity at the lower part of the spherical packing shell, and the packing pad is filled in the annular cavity above the conical packing, and the packing pressure cap is located above the packing pad, and the packing pressure cap is pressed by the upper pressure cover, and the upper pressure cover is threadedly connected to the upper end of the spherical packing shell.

[0029] The lower part of the spherical lower joint is provided with an external thread. The number of the spherical sealing pads is 2, which are respectively used for sealing the spherical lower joint and the ball head of the spherical packing shell. The number of the packing pads is 3-8. Example

[0030] Based on the technical solution of Example 1, the built-in well plug includes a conical rubber sleeve 61, a spacer 62, two retaining rings 63 and a truncated cone rubber sleeve 64; the conical rubber sleeve and the truncated cone rubber sleeve are respectively located below and above the spacer, and the conical rubber sleeve, the spacer, and the truncated cone rubber sleeve are assembled together by retaining rings and bolts. Example

[0031] Based on the technical solution of embodiment one, the spherical packing shell consists of a shell 71 and a ball head 72. The upper part of the shell is provided with an external thread, and the ball head is installed on the lower part of the shell through the thread. The lower part is a trumpet hole, which cooperates with the truncated cone-shaped rubber sleeve of the built-in well sealer. The ball head is installed on the lower part of the shell through the thread and fixed by welding. Example

[0032] Based on the technical solution of the first embodiment, the upper gland is composed of a threaded sleeve 111, a turning handle 112 and a pressing ring 113. The pressing ring is welded to the top of the threaded sleeve, and the turning handle is symmetrically welded to both sides of the threaded sleeve. Example

[0033] On the basis of the technical solution of the first embodiment, six spiral bevel grooves are arranged on the inner wall of the ball head of the spherical lower joint. When the polished rod breaks off and the nylon ball is stuck by the dead oil, the spiral bevel grooves will accelerate the flow rate of the liquid, causing the nylon ball to be quickly rotated out and seal the wellhead, which can effectively shorten the well sealing time.

[0034] When using the fully automatic differential pressure well sealer, first disassemble the well sealer on the ground, insert the bare rod, ball pressure cap, and spherical lower joint in sequence, insert the nylon ball into the main body and then insert the built-in well sealer, with the frustum of the built-in well sealer facing upwards, and then assemble the spherical packing shell, ball pressure cap, conical packing, packing pad, packing pressure cap and upper pressure cover.

[0035] During the assembly process, first load the rod, connect the spherical lower joint to the wellhead, install the packing cap into the shell, install the gland, and then connect the spherical caps at both ends of the main body to the main body, and finally tighten them with two pipe pliers at the same time. At this time, the adjustment of deviation and inclination has been completed. Open the upper gland and packing cap, install the conical packing and 5 or 6 packing pads, tighten the upper gland and start pumping.

[0036] When the pumping unit is working normally, tighten the upper gland once a week or so. When the threads of the upper gland are almost used up, that is, when the packing pad is completely worn out, the packing pad can be replenished. After the shutdown, the upper gland can be opened directly. The built-in automatic well sealer will automatically seal the wellhead under the action of the pressure difference. When a light rod is broken, the nylon ball will automatically seal the wellhead under the action of the liquid. The upper part of the built-in well sealer is a truncated cone-shaped rubber sleeve, which cooperates with the trumpet hole at the lower end of the spherical packing shell. After assembly, the trumpet hole is seated on the truncated cone-shaped rubber sleeve. Below it is a conical rubber sleeve. When the upper gland is opened, the pressure below the well sealer is greater than the pressure above. Under the action of the hydraulic pressure, the conical rubber sleeve shrinks inward to form a seal with the light rod and pushes the built-in well sealer to move upward or have a tendency to move. Under the action of the trumpet hole, the truncated cone rubber sleeve shrinks inward and forms a seal with the light rod again. The greater the pressure, the better the sealing effect.

Claims

1. A fully automatic differential pressure well plugging device, characterized in that: The fully automatic differential pressure well plugger comprises a spherical lower joint, a spherical pressure cap, a spherical sealing pad, a nylon ball, a main body, a built-in well plugger, a spherical packing shell, a conical packing, a packing pad, a packing pressure cap and an upper pressure cover; The fully automatic differential pressure well sealer is mounted on the bare rod of the oil pump; the spherical lower joint is mounted on the spherical sealing gasket at the lower end of the main body, and is locked and fixed by a spherical pressure cap threadedly connected to the lower end of the main body, and the nylon ball is located in the annular cavity at the lower part of the main body; the built-in well sealer is located in the sealing seat at the upper part of the main body, the spherical packing shell is mounted on the spherical sealing gasket at the upper end of the main body, and is locked and fixed by a spherical pressure cap threadedly connected to the upper end of the main body; the conical packing is filled in the conical annular cavity at the lower part of the spherical packing shell, and the packing pad is filled in the annular cavity above the conical packing, and the packing pressure cap is located above the packing pad, and the packing pressure cap is pressed by the upper pressure cover, and the upper pressure cover is threadedly connected to the upper end of the spherical packing shell.

2. The fully automatic differential pressure well plugging device according to claim 1 is characterized in that: The lower part of the spherical lower joint is provided with an external thread.

3. The fully automatic differential pressure well plugging device according to claim 1 is characterized in that: Six spiral grooves are arranged on the inner wall of the ball head of the spherical lower joint.

4. The fully automatic differential pressure well plugging device according to claim 1 is characterized in that: The number of the spherical sealing gaskets is 2, which are respectively used for sealing the spherical lower joint and the ball head of the spherical packing shell.

5. The fully automatic differential pressure well plugging device according to claim 1 is characterized in that: The built-in well plug includes a conical rubber sleeve, a spacer, two retaining rings and a truncated cone rubber sleeve; the conical rubber sleeve and the truncated cone rubber sleeve are respectively located below and above the spacer, and the conical rubber sleeve, the spacer and the truncated cone rubber sleeve are assembled together through retaining rings and bolts.

6. The fully automatic differential pressure well plugging device according to claim 1 is characterized in that: The spherical packing shell is composed of a shell and a ball head. The upper part of the shell is provided with an external thread, and the lower part thereof is a trumpet hole. The ball head is installed on the lower part of the shell through the thread and fixed by welding.

7. The fully automatic differential pressure well plugging device according to claim 1 is characterized in that: The upper gland is composed of a threaded sleeve, a rotating handle and a pressing ring. The pressing ring is welded to the top of the threaded sleeve, and the rotating handle is symmetrically welded to both sides of the threaded sleeve.

8. The fully automatic differential pressure well plugging device according to claim 1 is characterized in that: The number of the packing pads is 3-8.

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