CN211777318U - Well head leakage well killing circulating device - Google Patents

Abstract

A well head leakage well killing circulation device is characterized in that a casing outlet is arranged on a well head device, an oil pipe and the upper part of the casing are connected with the lower part of the well head device, an annular cavity between the oil pipe and the casing is communicated with the casing outlet, a pulling pipe is inserted into a screw pipe, the lower part of the pulling pipe penetrates out of the lower end of the screw pipe, the external thread of the upper part of the pulling pipe is screwed on the internal thread of the upper part of the screw pipe, the lower part of a rotating nut is inserted into the upper part of a connecting seat, a plurality of connecting balls are placed between the rotating nut and the connecting seat from a placing hole on the upper side surface of the connecting seat, a stop block blocks the outer side of the placing hole on the upper side surface of the connecting seat, the external thread of the screw pipe is screwed with the internal thread of the rotating nut, a cone is conical, the inner hole of a rubber cylinder is a conical hole, the conical hole of, The rubber cylinder and the cone are placed in the wellhead device, the lower part of the connecting seat is connected with the upper part of the wellhead device, and the upper part of the lifting pipe is provided with a valve.

Description

Well head leakage well killing circulating device

Technical Field

The utility model belongs to the on-spot instrument of using of oil field pumping well operation is a well head leakage well killing well circulating device.

Background

The well head device of the oil-water well generally comprises a valve, an upper flange, a large four-way joint and a lower flange, and the joint can generate leakage after long-time use. The oil-water well needs frequent workover, need killing the well construction when the workover to the oil-water well that pressure is high, when killing the well that the wellhead assembly has the leakage, the well head can produce the thorn and damage, has serious safety problem on the one hand, and on the other hand killing fluid can be sprayed at the well site, and the polluted environment also causes very big difficulty for operation workman's operation.

Disclosure of Invention

The utility model aims at designing a well head lost circulation well killing circulating device, when oil-water well wellhead assembly was lost, use this kind of device can avoid the leakage point to form killing fluid circulation passageway, make it can carry out the killing operation, avoid above-mentioned problem to take place.

The purpose of the utility model is realized like this: the oil pipe and the upper part of the sleeve are connected with the lower part of the wellhead device, an annular cavity between the oil pipe and the sleeve is communicated with the sleeve outlet, the pulling pipe is inserted into the screw pipe, the lower part of the pulling pipe penetrates out of the lower end of the screw pipe, the external thread on the upper part of the pulling pipe is screwed on the internal thread on the upper part of the screw pipe, the lower part of the rotating nut is inserted into the upper part of the connecting seat, a plurality of connecting balls are placed between the rotating nut and the connecting seat from a placing hole on the upper side surface of the connecting seat, the stop blocks the outer side of the placing hole on the upper side surface of the connecting seat, the rotating nut and the connecting seat are connected into a whole by the connecting balls, so that the rotating nut and the connecting seat can only rotate relatively and cannot axially float, the external thread of the screw pipe is screwed with the internal thread of the rotating nut, the cone is conical, the diameter of the upper end of the cone is smaller than that of the lower end of the cone, the inner hole of the rubber cylinder is a conical hole, the conical hole of the rubber cylinder is matched with the outer wall of the cone, the rubber cylinder is sleeved outside the cone, the upper portion of the cone is connected with the lower portion of the lifting pipe, the lower portion of the screw pipe, the rubber cylinder and the cone are placed into the wellhead device, the lower portion of the connecting seat is connected with the upper portion of the wellhead device, the screw pipe drives the rubber cylinder and the cone to move downwards into the oil pipe by rotating the rotary nut, and the valve is installed.

The utility model has the advantages that: the rubber sleeve and the cone are located in the oil pipe, the spiral pipe is fixed, the pulling pipe is rotated, the pulling pipe moves upwards under the action of the threads, the upper end of the rubber sleeve cannot move due to the limitation of the lower end face of the spiral pipe, the rubber sleeve expands to become large under the action of the conical surface and is tightly attached to the inner wall of the oil pipe, the inside of the wellhead device is separated, well killing fluid can be pumped into the oil pipe through the pulling pipe, the well killing fluid reaches the bottom of the oil pipe and returns out of the sleeve, and well killing is achieved. Therefore, the utility model discloses can reach the invention purpose, can avoid the leakage point to form kill-job fluid circulation passageway, make it carry out the kill-job operation, prevent that the kill-job fluid from spouting the well site and producing the safety problem.

Drawings

Fig. 1 is an assembly front view of the present invention.

Fig. 2 is a cross-sectional view taken along line a-a in fig. 1.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As can be seen from the figure, the utility model comprises a valve 1, a lifting pipe 2, a spiral pipe 3, a swivel nut 4, a connecting ball 5, a stop dog 6, a connecting seat 7, a wellhead device 8, a rubber cylinder 9, a cone 10, an oil pipe 11 and a sleeve pipe 12, wherein the wellhead device 8 is provided with a sleeve pipe outlet 8-1, the upper parts of the oil pipe 11 and the sleeve pipe 12 are connected with the lower part of the wellhead device 8, an annular cavity between the oil pipe 11 and the sleeve pipe 12 is communicated with the sleeve pipe outlet 8-1, the lifting pipe 2 is inserted into the spiral pipe 3, the lower part of the lifting pipe 2 penetrates out of the lower end of the spiral pipe 3, the upper external thread of the lifting pipe 2 is screwed on the internal thread on the upper part of the spiral pipe 3, the lower part of the swivel nut is inserted into the upper part of the connecting seat 7, a plurality of connecting balls 5 are placed between the swivel nut 4 and the connecting seat 7 from a placing, the connecting ball 5 connects the rotary nut 4 and the connecting seat 7 into a whole, so that the rotary nut 4 and the connecting seat 7 can only rotate relatively and cannot move axially, the external thread of the screw tube 3 is screwed with the internal thread of the rotary nut 4, the cone 10 is conical, the upper end diameter of the cone 10 is smaller than the lower end diameter, the inner hole of the rubber tube 9 is a conical hole, the conical hole of the rubber tube 9 is matched with the outer wall of the cone 10, the rubber tube 9 is sleeved outside the cone 10, the upper part of the cone 10 is connected with the lower part of the lifting tube 2, the lower part of the screw tube 3, the rubber tube 9 and the cone 10 are placed in the wellhead device 8, the lower part of the connecting seat 7 is connected with the upper part of the wellhead device 8, the rotary nut 4 is rotated to enable the screw tube 3 to drive the rubber tube 9, the cone 10 descends to the oil tube.

After the lower part of the solenoid 3, the rubber sleeve 9 and the cone 10 are placed in the wellhead device 8, due to pressure in a well, the rotating nut 4 is rotated, the rubber sleeve 9 and the cone 10 can be made to descend to be located in the oil pipe 11, the solenoid 3 is fixed, the pulling pipe 2 is rotated, the pulling pipe 2 ascends under the action of the external thread of the pulling pipe 2 and the internal thread of the solenoid 3, the upper end of the rubber sleeve 9 is limited by the lower end face of the solenoid 3 and cannot move, the rubber sleeve 9 expands to have an enlarged outer diameter under the action of the conical surface and is tightly attached to the inner wall of the oil pipe 11, the inside of the wellhead device 8 is separated, well killing fluid can be pumped into the oil pipe 11 through the pulling pipe 2, reaches the bottom of the oil pipe 11 and returns out of the sleeve 12, and well killing is achieved.

Claims (1)

1. The utility model provides a well head lost circulation of well killing circulating device that leaks, includes valve (1), carry and draw pipe (2), solenoid (3), swivel nut (4), connecting ball (5), dog (6), connecting seat (7), wellhead assembly (8), packing element (9), cone (10), oil pipe (11), sleeve pipe (12), there is sleeve pipe export (8-1) on wellhead assembly (8), the sub-unit connection of oil pipe (11), the upper portion of sleeve pipe (12) and wellhead assembly (8), the annular cavity between oil pipe (11) and sleeve pipe (12) with sleeve pipe export (8-1) communicate with each other characterized by: the pulling pipe (2) is inserted into the screwed pipe (3), the lower part of the pulling pipe (2) penetrates out of the lower end of the screwed pipe (3), the upper external thread of the pulling pipe (2) is screwed on the internal thread of the upper part of the screwed pipe (3), the lower part of the rotating nut (4) is inserted into the upper part of the connecting seat (7), a plurality of connecting balls (5) are placed between the rotating nut (4) and the connecting seat (7) from a placing hole on the upper side surface of the connecting seat (7), the stop block (6) blocks the outer side of the placing hole on the upper side surface of the connecting seat (7), the rotating nut (4) and the connecting seat (7) are connected into a whole by the connecting balls (5), so that the rotating nut (4) and the connecting seat (7) can only rotate relatively and cannot move axially, the external thread of the screwed on the internal thread of the rotating nut (4), the cone (10) is conical, the upper end diameter of the cone (10) is, the hole of packing element (9) is the taper hole, the taper hole of packing element (9) and the outer wall cooperation of cone (10), packing element (9) suit is outside cone (10), the upper portion of cone (10) and the sub-unit connection of carrying handle pipe (2), the lower part of screwed pipe (3), packing element (9), in well head device (8) was put into in cone (10), the lower part of connecting seat (7) is connected with the upper portion of well head device (8), rotate swivel nut (4) and make screwed pipe (3) drive packing element (9), cone (10) down to in oil pipe (11), the upper portion installation valve (1) of carrying handle pipe (2).

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