CN219262332U - Natural gas wellhead plugging device - Google Patents

Abstract

The utility model discloses a natural gas wellhead plugging device, which comprises a well pipe, wherein the top of the well pipe is in threaded connection with a pipe cover, a rotary head is arranged at the center of the top of the pipe cover, a support ring is arranged in the well pipe, a soft head is arranged in the pipe cover and is tightly pressed on the support ring, a liquid discharge hole is formed in one side of the bottom of the pipe cover, a first soft ring is arranged in the liquid discharge hole, and rotary threads are inserted in the first soft ring and are in threaded connection with the liquid discharge hole. The reverse rotation plate rotates the pressing plug out of the pouring cylinder, then the bonding adhesive is poured into the pouring cylinder, then the plate is rotated forward, the pressing plug is pressed into the pouring cylinder, new bonding adhesive can be poured into the thread fit gap of the pipe cover and the well pipe until part of new adhesive liquid is discharged from the liquid discharge hole, the spiral wire is locked in the liquid discharge hole, the through pipe is rotated out of the rotary cover, finally the plastic bag is sleeved on the rotary cover, and the binding rope is adopted for binding, so that the pipe cover is not required to be detached when the plugging operation is carried out, and the plugging of the matched sealing part of the pipe cover and the well pipe can be realized.

Description

Natural gas wellhead plugging device

Technical Field

The utility model belongs to the technical field, and particularly relates to a plugging device for a natural gas wellhead.

Background

In the natural gas production process, when the natural gas volume of extracting obviously reduces, need carry out the operation of changing the well, pour into the thick liquid with original natural gas well earlier, realize filling out the pressure to the underground, last carry out the shutoff to original natural gas well through the shutoff cap, the shutoff cap main part is the circular cap structure, its interior top is provided with the sealing ring, by solid glue bonding stable back, the shutoff cap spiro union can be at the natural gas well head, in the spiro union, with the internal thread coating bonding glue of shutoff cap, when the shutoff cap screw thread locking at the natural gas well head, the sealing ring is compressed tightly at the natural gas well head, wait for the bonding glue to solidify the back, can effectively block up shutoff cap and natural gas well head spiro union department, not only prevent the shutoff cap rotation, can also play multiple sealed effect to the sealing ring in the shutoff cap that can relay, the shortcoming that exists is: in the process of long-term plugging, the bonding glue can also generate bubble state cracking, and the plugging cap and the natural gas wellhead often have different degrees of gas leakage or liquid leakage phenomena, and the existing treatment mode is as follows: firstly unscrewing the plugging cap, then baking the threads of the natural gas wellhead and the threads of the inner wall of the plugging cap by adopting a non-open flame heating rod, baking the original adhesive, filling the adhesive, and locking the plugging cap at the natural gas wellhead again, wherein the defects are that: the plugging mode needs to detach the plugging cap, and when the pressure in the natural gas wellhead is high, the plugging cap is difficult to screw, and in addition, the bonding glue is aged and washed away, so that the plugging device of the natural gas wellhead, which does not need to detach the plugging cap and can effectively plug, is necessary.

Disclosure of Invention

The utility model aims to provide a natural gas wellhead plugging device to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a natural gas wellhead plugging device, includes the well pipe, the top spiro union of well pipe has the tube cap, the top central point of tube cap puts and is provided with the head soon, be provided with the holding ring in the well pipe, be provided with soft head and soft head in the tube cap and compress tightly the holding ring, bottom one side of tube cap is equipped with the flowing back hole, be provided with first soft ring in the flowing back hole, it has spiral shell silk and spiro union in the flowing back hole to alternate in the first soft ring, the opposite side of tube cap is equipped with the port department of inlet port and is connected with the liquid pipe, the one end of liquid pipe is connected with the injecting glue device that can pour into liquid bonding glue into in tube cap and the well pipe spiro union gap.

Preferably, a supporting disc is arranged at the outer edge of the top of the pipe cover, a first pressing ring is arranged at the bottom of the pipe cover, a first annular groove is formed in the supporting disc, and the first pressing ring is inserted into the first annular groove.

Preferably, a second compression ring is arranged at the top of the well pipe and is compressed in the soft head.

Preferably, the glue injection device comprises a spiral cover arranged at the end of the liquid passing pipe, a through pipe is screwed in the spiral cover, a second soft ring is arranged in the spiral cover, the port of the through pipe is tightly pressed by the second soft ring, a filling cylinder is arranged at one end of the through pipe, a pressing plug is arranged in the filling cylinder, a soft sleeve is sleeved outside the pressing plug, a screw sleeve is connected to one side of the top of the filling cylinder through a supporting frame, a screw rod is screwed in the screw sleeve, a bearing groove is formed in the pressing plug, a bearing is arranged in the bearing groove, a rotating shaft is arranged at the central position of the bottom of the screw rod, the rotating shaft is inserted into an inner ring of the bearing, and a rotating plate is arranged at the top of the screw rod.

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

according to the utility model, the clockwise rotation plate drives the pressing plug to move downwards under the cooperation of the screw rod and the screw sleeve, the gas is used for pressing the melted colloid in the threaded cooperation gap of the pipe cover and the well pipe, the melted colloid is discharged through the liquid discharge hole, then the clockwise rotation plate rotates the pressing plug out of the pouring cylinder, then the adhesive is poured into the pouring cylinder, then the clockwise rotation plate rotates the pressing plug into the pouring cylinder, new adhesive is poured into the threaded cooperation gap of the pipe cover and the well pipe until the liquid discharge hole discharges part of new adhesive liquid, the screw is locked in the liquid discharge hole, the through pipe is screwed out of the screw cover, finally the plastic bag is sleeved on the screw cover, and the binding rope is used for binding, so that the sealing of the matched sealing position of the pipe cover and the well pipe can be realized without disassembling the pipe cover during the plugging operation.

Drawings

FIG. 1 is a schematic view in partial cutaway of the front view of the present utility model;

FIG. 2 is an enlarged schematic view of the structure at a in FIG. 1;

fig. 3 is an enlarged schematic view of the structure at b in fig. 1.

In the figure: 1 well pipe, 2 pipe cover, 3 rotary head, 4 support ring, 5 soft head, 6 support disc, 7 first clamping ring, 8 first soft ring, 9 rotary wire, 10 second clamping ring, 11 liquid pipe, 12 rotary cover, 13 through pipe, 14 second soft ring, 15 pouring cylinder, 16 press plug, 17 soft sleeve, 18 support frame, 19 wire sleeve, 20 screw rod, 21 bearing, 22 rotary plate.

Detailed Description

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

Referring to fig. 1 and 2, the embodiment of the utility model provides a plugging device for a natural gas wellhead, which comprises a well pipe 1, wherein the top of the well pipe 1 is in threaded connection with a pipe cover 2, a rotary head 3 is integrally arranged at the center position of the top of the pipe cover 2, a hexagonal wrench can be used for inserting the rotary pipe cover 2 into a hexagonal groove in the rotary head 3, a supporting ring 4 is integrally arranged in the well pipe 1, a soft head 5 is bonded in the pipe cover 2 by resin adhesive, the soft head 5 is a circular step rubber block, the soft head 5 compresses the supporting ring 4, a primary sealing effect can be achieved, a drain hole is arranged at the left side of the bottom of the pipe cover 2, a supporting disc 6 is integrally arranged at the outer edge of the top of the pipe cover 2, a first pressing ring 7 is of a semicircular circular ring structure with a cross section, a first annular groove is arranged on the supporting disc 6, the first annular groove is of a semicircular circular groove with a cross section, the first pressing ring 7 is tightly inserted into the first annular groove, the stability of the threaded connection between the pipe cover 2 and the well pipe 1 can be improved, the sealing effect of the soft head 2 and the soft head 1 can also be improved, the drain hole Kong Nasai is matched with the soft head 1, the soft head 8 is tightly pressed by the first pressing ring 8, the first pressing ring 8 is provided with a second pressing ring 10, a sealing hole is arranged at the inner side of the soft head 10, and a sealing hole is provided with a sealing hole 10, which is tightly pressed on the soft head 10, and is provided with a sealing hole 10, and is tightly sealing hole is arranged at the end 10, and a sealing hole 10.

Referring to fig. 1, 2 and 3, one end of the liquid passing pipe 11 is connected with a glue injecting device capable of injecting liquid adhesive into a screwed joint gap between the pipe cover 2 and the well pipe 1, the glue injecting device comprises a screwed cover 12 integrally arranged at a port of the liquid passing pipe 11, the screwed cover 12 is internally screwed with a through pipe 13, a second soft ring 14 is inserted into the screwed cover 12, the port of the through pipe 13 compresses the second soft ring 14, the second soft ring 14 is made of neoprene, a pouring cylinder 15 is integrally arranged at the upper end of the through pipe 13, a pressing plug 16 is inserted into the pouring cylinder 15, a soft sleeve 17 is bonded outside the pressing plug 16 by adopting resin adhesive, the soft sleeve 17 is made of neoprene, a supporting frame 18 is welded on the right side of the top of the pouring cylinder 15, a screw sleeve 19 is fixed at the top of the supporting frame 18, a screw 20 is screwed in the screw sleeve 19, a bearing groove is arranged in the pressing plug 16, a bearing 21 is inserted into the bearing groove, a rotating shaft is integrally arranged at the bottom center of the screw 20, the rotating shaft is inserted into the inner ring of the bearing 21 in an interference manner, the screw 20 is rotated through the bearing 21, and a screw plate 22 is integrally arranged at the top of the screw plate 20 in an interference manner.

The working principle of this embodiment is as follows: when the plugging is needed, the screw 9 is screwed out of the liquid inlet hole, the through pipe 13 is screwed into the screw cap 12, then a non-open fire heating rod is adopted to contact the side wall of the pipe cap 2 at the set temperature of 120 ℃, the screw plate 22 is screwed forward, the screw rod 20 is matched with the screw sleeve 19 to drive the pressing plug 16 to move downwards, the melted colloid in the threaded matching gap between the pipe cap 2 and the well pipe 1 is pressed against by gas, the melted colloid is discharged through the liquid discharge hole, then the screw plate 22 is screwed out of the injection cylinder 15, then the adhesive is injected into the injection cylinder 15, the screw plate 22 is screwed forward, the pressing plug 16 is pressed into the injection cylinder 15, new adhesive is injected into the threaded matching gap between the pipe cap 2 and the well pipe 1 until the liquid discharge hole is partially filled with new adhesive, the screw 9 is locked in the liquid discharge hole, and the through pipe 13 is screwed out of the screw cap 12, and finally a plastic bag is sleeved on the screw cap 12, and binding is not needed, so that the plugging operation can be carried out by removing the pipe cap 2 and the plugging position of the well pipe cap 1.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model.

Claims (4)

1. The utility model provides a natural gas well head plugging device which characterized in that: including well pipe (1), the top spiro union of well pipe (1) has tube cap (2), the top central point of tube cap (2) puts and is provided with swivel (3), be provided with support ring (4) in well pipe (1), be provided with soft head (5) in tube cap (2) and soft head (5) compress tightly support ring (4), bottom one side of tube cap (2) is equipped with the fluid-discharge hole, be provided with first soft ring (8) in the fluid-discharge hole, it has spiral shell silk (9) and spiro union in the fluid-discharge hole to alternate in first soft ring (8), the opposite side of tube cap (2) is equipped with feed liquor hole and feed liquor hole's port department is connected with logical liquid pipe (11), the one end of leading to liquid pipe (11) is connected with can be to pour into the glue injection device of bonding liquid glue into in tube cap (2) and well pipe (1) spiro union gap.

2. The natural gas wellhead plugging device of claim 1, wherein: the pipe cover is characterized in that a supporting disc (6) is arranged on the outer edge of the top of the pipe cover (2), a first pressing ring (7) is arranged at the bottom of the pipe cover (2), a first annular groove is formed in the supporting disc (6), and the first pressing ring (7) is inserted into the first annular groove.

3. The natural gas wellhead plugging device of claim 1, wherein: the top of well pipe (1) is provided with second clamping ring (10) and second clamping ring (10) compress tightly in soft head (5).

4. The natural gas wellhead plugging device of claim 1, wherein: the glue injection device comprises a spiral cover (12) arranged at a port of a liquid passing pipe (11), a through pipe (13) is screwed in the spiral cover (12), a second soft ring (14) is arranged in the spiral cover (12), the port of the through pipe (13) is tightly pressed by the second soft ring (14), one end of the through pipe (13) is provided with a pouring cylinder (15), a pressing plug (16) is arranged in the pouring cylinder (15), a soft sleeve (17) is sleeved outside the pressing plug (16), a screw sleeve (19) is connected to one side of the top of the pouring cylinder (15) through a supporting frame (18), a screw rod (20) is screwed in the screw sleeve (19), a bearing groove is formed in the pressing plug (16), a bearing (21) is arranged in the bearing groove, a rotating shaft is arranged at the center position of the bottom of the screw rod (20), the rotating shaft is inserted into an inner ring of the bearing (21), and a rotating plate (22) is arranged at the top of the screw rod (20).

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