CN216043617U - Oil field water injection wellhead assembly - Google Patents

Abstract

The utility model discloses an oil field water injection wellhead device which comprises an accumulation barrel, wherein the bottom of one side of the accumulation barrel is connected with a drain pipe, a row head is arranged in the accumulation barrel, a supporting pipe is arranged in the accumulation barrel, a supporting rod is inserted in the supporting pipe, a spring is arranged in the supporting pipe and is positioned below the supporting rod, and the top of the supporting rod is connected with a blocking ball which tightly presses the lower port of the row head. When the upper surface of the filter screen needs to be cleaned, the rotary disc is rotated, the cylinder cover is screwed out of the accumulation cylinder, the cylinder cover is pulled upwards, the washing and the cleaning of the upper surface of the filter screen by the soft brush can be implemented, the cleaned impurities are taken out of the accumulation cylinder, and when the water injection is overflowed due to the unbalanced underground oil pressure, the lower port of the discharge head on the ball is blocked under the elastic support of the spring, so that the oil water entering the lower part of the accumulation cylinder is effectively prevented from entering the discharge head, the cleaning of the filter screen is facilitated, and the cylinder cover is conveniently covered on the accumulation cylinder again.

Description

Oil field water injection wellhead assembly

Technical Field

The utility model belongs to the technical field of oilfield water injection, and particularly relates to an oilfield water injection wellhead device.

Background

The oil field water injection well head is arranged, aiming at injecting a pressure water source into the underground of an oil field, thereby increasing the lift force of oil in an oil well and improving the exploitation efficiency, the existing oil field water injection well head is plugged by waterproof concrete, a drain pipe is embedded in the waterproof concrete and is directly inserted into the well, the upper end of the drain pipe is connected with an accumulation barrel, a filter screen is arranged in the accumulation barrel, one end of the accumulation barrel is connected with a water inlet pipe, one end of the water inlet pipe is connected with a stop valve, one end of the stop valve is connected with a pressure water tank through a water pipe, the stop valve is opened, the pressure water in the pressure water tank enters the accumulation barrel through the water inlet pipe and then is discharged to the well through the drain pipe, the filter screen is arranged, the impurities which are accumulated for a long time in the pressure water tank can be filtered, and because the filter screen is used for filtering the impurities for a long time, the upper surface has impurity deposition and needs to be cleaned regularly, the top barrel cover of the accumulation barrel can be detached, then the filter screen is cleaned and brushed through the steel wire soft brush, and impurities are taken out, and the defects that: the oil pressure of underground oil in an oil field is easy to be unbalanced due to various factors, so that the water injected into the underground of the oil field is easy to generate back spray in the process of opening the accumulation barrel, the cleaning of a filter screen is not facilitated, and a subsequent barrel cover is not easy to be installed on the accumulation barrel again.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an oilfield water injection wellhead device to solve the problem that in the prior art, impurities on a filter screen are not convenient to clean.

In order to achieve the purpose, the utility model provides the following technical scheme: an oilfield water injection wellhead device comprises an accumulation barrel, wherein the bottom of one side of the accumulation barrel is connected with a drain pipe, a row head is arranged in the accumulation barrel, a supporting pipe is arranged in the accumulation barrel, a supporting rod is inserted in the supporting pipe, a spring is arranged in the supporting tube and is positioned below the supporting rod, the top of the supporting rod is connected with a blocking ball which tightly presses the lower port of the row head, the upper port of the accumulation cylinder is in threaded connection with a cylinder cover, a connecting column is arranged in the cylinder cover, the bottom of the connecting column is connected with a connecting plate, the outer edge of the connecting plate is provided with an edge ring, the filter screens are arranged in the edge plate and positioned at the two sides of the connecting plate, the opposite side upper portion of an accumulation section of thick bamboo is connected with the inlet tube, the one end of inlet tube is connected with the stop valve, the one end of stop valve is connected with water service pipe and water service pipe intercommunication outside pressurization water source.

Preferably, the row head is of a circular ring structure with a conical circular tube arranged at the center.

Preferably, the port department inner wall of the section of thick bamboo that accumulates is provided with the support ring, be provided with the sealing ring in the support ring, the sealing ring is the ring structure of cross-section T type, be provided with the clamping ring on the cover, the clamping ring is the ring structure of cross-section semicircle, the clamping ring compresses tightly on the sealing ring.

Preferably, the filter screen is an arc-shaped screen plate, and the diameter of the meshes of the filter screen is not more than one millimeter.

Preferably, a rotary column is arranged at the center of the cylinder cover, and a rotary disc is arranged at the top of the rotary column.

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

in the utility model, when the cylinder cover is locked at the upper port of the accumulation cylinder, the pressure ring is pressed on the sealing ring to force the upper end of the sealing ring to be concave inwards, the inner wall and the outer wall of the sealing ring are expanded outwards transversely, so that the inner wall and the outer wall of the sealing ring respectively press the inner wall of the accumulation cylinder and the inner wall of the supporting ring, the sealing performance of the cylinder cover to the accumulation cylinder is effectively enhanced, when the upper surface of the filter screen needs to be cleaned, the rotary disc is rotated to screw the cylinder cover out of the accumulation cylinder, the cylinder cover is pulled upwards, the upper surface of the filter screen can be washed and brushed by a soft brush, the cleaned impurities are taken out of the accumulation cylinder, when the underground oil pressure is unbalanced and the water is overflowed, because the blocking ball is supported by the spring elastically and abuts against the lower port of the discharge head, the oil and water entering the lower part of the accumulation cylinder are effectively prevented from entering the discharge head, the cleaning of the filter screen is facilitated, and the cylinder cover is conveniently covered on the accumulation cylinder again, so that the problem that the cleaning of impurities on the filter screen is inconvenient is solved.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view in partial cutaway of FIG. 1;

FIG. 3 is a schematic top view taken at A-A of FIG. 1;

FIG. 4 is an enlarged view of a portion a of FIG. 2;

fig. 5 is an enlarged schematic view of the structure at b of fig. 2.

In the figure: 1 accumulation cylinder, 2 drainage pipes, 3 rows of heads, 4 support pipes, 5 support rods, 6 springs, 7 blocking balls, 8 cylinder covers, 9 support rings, 10 sealing rings, 11 pressing rings, 12 connecting columns, 13 connecting plates, 14 side rings, 15 filter screens, 16 water inlet pipes, 17 stop valves, 18 water service pipes, 19 rotary columns and 20 rotary discs.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1, 2, 3 and 4, an embodiment of the present invention provides an oilfield flooding wellhead device, including an accumulation barrel 1, wherein the accumulation barrel 1 is a cylindrical structure with an outer cross-sectional diameter of 40 cm and a height of 1.5 m, a drain hole is formed at the bottom of the left side of the accumulation barrel 1, the drain pipe 2 is welded seamlessly, the drain pipe 2 penetrates into an oilfield flooding well and seals the oilfield flooding wellhead through waterproof concrete, a discharge head 3 is arranged in the accumulation barrel 1, the discharge head 3 is a circular ring structure with a conical circular pipe at the center, the accumulation barrel 1 and the discharge head 3 are made of a fusion casting integral piece, a support pipe 4 is welded at the center of the inner lower end of the accumulation barrel 1, the support pipe 4 is a square pipe, a support rod 5 is inserted in the support pipe 4 in a sliding manner, the support rod 5 is a square rod, a spring 6 is inserted in the support pipe 4 and is located below the support rod 5, the spring 6 is of a compression rebound type, the initial compression rebound force of the spring 6 is 15 newtons, when blockking up ball 7 and compressing tightly the lower port of spareribs 3, spring 6 is initial compression resilience force for 18 newtons this moment, and the welding of the top of bracing piece 5 has the lower port that blocks up ball 7 and block up ball 7 and compress tightly spareribs 3, and the stable laminating of the lower port inner wall of spareribs 3 blocks up the outer wall of ball 7 to effectively avoid accumulating water of a 1 lower part of section of thick bamboo and get into in the spareribs 3.

Referring to fig. 1, 2, 3 and 5, a cylinder cover 8 is screwed to an upper port of an accumulation cylinder 1, a support ring 9 is arranged on an inner wall of a port of the accumulation cylinder 1, the support ring 9 is a circular ring with an L-shaped section, the accumulation cylinder 1 and the support ring 9 are a fusion-cast integral piece, a seal ring 10 is inserted into the support ring 9 too tightly, the seal ring 10 is a circular ring structure with a T-shaped section, the seal ring 10 is an oil-impregnated asbestos packing ring, a press ring 11 is arranged at an upper end inside the cylinder cover 8, the press ring 11 is a circular ring structure with a semicircular section, the cylinder cover 8 and the press ring 11 are a fusion-cast integral piece, when the cylinder cover 8 is locked at the upper port of the accumulation cylinder 1, the press ring 11 presses against the seal ring 10 to force the upper end of the seal ring 10 to be concave, the inner and outer walls of the seal ring 10 are laterally expanded, so that the inner and outer walls of the seal ring 10 respectively press the inner and outer walls of the accumulation cylinder 1 and the support ring 9, thereby effectively enhancing the sealing performance of the cylinder cover 8 on the accumulation cylinder 1, the cylinder cover 8 is connected with a connecting column 12 at the center inside, the cylinder cover 8 and the connecting column 12 are a fusion-cast integrated piece, the bottom of the connecting column 12 is connected with a connecting plate 13, the connecting column 12 and the connecting plate 13 are the fusion-cast integrated piece, the outer edge of the connecting plate 13 is provided with a side ring 14, the side ring 14 and the connecting plate 13 are the fusion-cast integrated piece, the side ring 14 is of a circular ring structure, filter screens 15 are welded in the side plate 14 and positioned at two sides of the connecting plate 13, the filter screens 15 are arc-shaped screen plates, the diameter of meshes of the filter screens 15 is one millimeter, the filter screens 15 are arranged to filter larger impurities in water entering the accumulating cylinder 1, a water inlet seamless welding water inlet pipe 16 is arranged at the upper part of the right side of the accumulating cylinder 1, the right end of the water inlet pipe 16 is screwed with the water outlet end of a stop valve 17, the type of the stop valve 17 is J41H, the water inlet end of the stop valve 17 is screwed with a water pipe 18, the water pipe 18 is connected with an external pressurizing water tank, the pressurizing water tank is pressurized at 40 MPa, the stop valve 17 is opened, the pressurized water in the pressurized water tank enters the accumulation barrel 1, the center of the upper end of the barrel cover 8 is provided with a rotary column 19, the top of the rotary column 19 is provided with a rotary disc 20, the barrel cover 8, the rotary column 19 and the rotary disc 20 are fusion-cast integrated pieces, and the rotary disc 20 is rotated to drive the barrel cover 8 to rotate.

The working principle of the embodiment is as follows: the stop valve 17 is opened, the pressurized water in the pressurized water tank enters the accumulation barrel 1 and is filtered by the meshes of the filter screens 15 at the two sides, the larger impurities in the water can be filtered on the screen, the water enters the discharge head 3 through the meshes of the filter screens 15 and is pressed against the blocking ball 7 downwards, the blocking ball 7 moves downwards to be separated from the pressing against the lower port of the discharge head 3, the spring 6 is compressed, the water enters the lower part of the accumulation barrel 1 and is then discharged to the underground of the oilfield water injection through the drain pipe 2, when the barrel cover 8 is locked at the upper port of the accumulation barrel 1, the press ring 11 is pressed on the seal ring 10, the upper end of the seal ring 10 is forced to be concave inwards, the inner wall and the outer wall of the seal ring 10 are transversely expanded outwards, the inner wall and the outer wall of the seal ring 10 are respectively pressed on the inner wall of the accumulation barrel 1 and the inner wall of the support ring 9, the tightness of the accumulation barrel 1 of the barrel cover 8 is effectively enhanced, when the upper surface of the filter screens 15 needs to be cleaned, the rotary disc 20 is rotated to screw the barrel cover 8 out of the accumulation barrel 1, and the cylinder cover 8 is pulled upwards, when the position of the filter screen 15 in the accumulation cylinder 1 is suitable for cleaning the filter screen 15, the cylinder cover 8 is stopped being pulled upwards, the upper surface of the filter screen 15 can be washed and cleaned by a soft brush, the cleaned impurities are taken out of the accumulation cylinder 1, and when the water injection overflows due to unbalanced underground oil pressure, the lower port of the discharge head 3 on the ball 7 is blocked under the elastic support of the spring 6, so that the oil water entering the lower part of the accumulation cylinder 1 is effectively prevented from entering the discharge head 3, the filter screen 15 is cleaned, and the cylinder cover 8 is conveniently covered on the accumulation cylinder 1 again.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (5)

1. The utility model provides an oil field water injection wellhead assembly which characterized in that: the device comprises an accumulation barrel (1), wherein the bottom of one side of the accumulation barrel (1) is connected with a drain pipe (2), a row head (3) is arranged in the accumulation barrel (1), a supporting pipe (4) is arranged in the accumulation barrel (1), a supporting rod (5) is inserted in the supporting pipe (4), a spring (6) is arranged in the supporting pipe (4), the spring (6) is positioned below the supporting rod (5), the top of the supporting rod (5) is connected with a blocking ball (7) and the blocking ball (7) tightly presses the lower port of the row head (3), the upper port of the accumulation barrel (1) is screwed with a barrel cover (8), a connecting column (12) is arranged in the barrel cover (8), the bottom of the connecting column (12) is connected with a connecting plate (13), the outer edge of the connecting plate (13) is provided with an edge ring (14), filter screens (15) are arranged in the edge ring (14) and on two sides of the connecting plate (13), the water storage device is characterized in that a water inlet pipe (16) is connected to the upper portion of the other side of the accumulation barrel (1), one end of the water inlet pipe (16) is connected with a stop valve (17), one end of the stop valve (17) is connected with a water pipe (18), and the water pipe (18) is communicated with an external pressurized water source.

2. The oilfield water flooding wellhead assembly of claim 1, wherein: the row head (3) is of a circular ring structure with a conical circular tube at the center.

3. The oilfield water flooding wellhead assembly of claim 1, wherein: the port department inner wall of accumulation section of thick bamboo (1) is provided with support ring (9), be provided with sealing ring (10) in support ring (9), sealing ring (10) are the ring structure of cross-section T type, be provided with clamping ring (11) on cover (8), clamping ring (11) are the semicircular ring structure in cross-section, clamping ring (11) compress tightly on sealing ring (10).

4. The oilfield water flooding wellhead assembly of claim 1, wherein: the filter screen (15) is an arc-shaped screen plate, and the diameter of meshes of the filter screen (15) is not more than one millimeter.

5. The oilfield water flooding wellhead assembly of claim 1, wherein: the center position of cover (8) is provided with revolves post (19), the top of revolving post (19) is provided with capstan (20).

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