CN217327253U - Release-free oil drainage tubing anchor - Google Patents

Abstract

The utility model relates to a release-free oil drainage tubing anchor, which comprises an upper joint, an external working barrel, a release barrel, an upper cone, a central tube, a slip sleeve, a spring, a slip, a lower cone, a connecting sleeve, a limiting sleeve and a lower joint, wherein a release piston is arranged between the working barrel and the central tube; a fixed piston is arranged between the release cylinder and the central tube, and a clamp spring is arranged in a clamp groove at the upper end of the fixed piston; a baffle ring is sleeved at the upper end of the connecting sleeve, a plurality of circular hole grooves are uniformly distributed on the lower connector, baffle pins are placed in the circular hole grooves, and the outer ends of the baffle pins are placed between the lower end of the connecting sleeve and the limiting sleeve; a pressure cavity is arranged between the release piston and the release cylinder, between the release piston and the central tube and between the release cylinder and the central tube and between the release piston and the central tube; the tool has the functions of oil drainage and anchoring, a pump truck is not needed to be pressed during anchoring, anchoring operation can be completed only through the underground liquid column pressure compressed air cavity, the oil drainage function can be completed only by lifting the pipe column during secondary operation, operation cost is saved, environment-friendly operation is achieved, and unnecessary potential safety hazards can be avoided.

Description

Release-free oil drainage tubing anchor

Technical Field

The utility model relates to a pumping unit well pump oil pipe anchor instrument that oils specifically relates to a release-free draining oil pipe anchor.

Background

The oil field operation team carries out the secondary construction operation in-process to the oil well at the scene, because there is remaining fluid in the pipe and can't discharge, fluid spills over and causes environmental pollution when playing the tubular column, and current draining instrument adopts the pump truck to suppress and throws the pole striking mode to drain oil more, has increased the degree of difficulty and the potential safety hazard of crude oil exploitation cost and well head operation, has also influenced the construction progress simultaneously. Meanwhile, the existing anchoring tool for the oil pipe and the pump needs an oil pipe pump truck to carry out methods such as oil pipe pressing or rotary anchoring and the like during anchoring, and operation is troublesome. Therefore, the construction period is prolonged, the construction cost is increased, and potential safety hazards exist.

Disclosure of Invention

In order to compensate the not enough of above-mentioned prior art, the utility model aims at providing release-free draining oil pipe anchor, this instrument has the function of draining and anchoring simultaneously, need not the pump truck during anchoring moreover and suppresses, only needs can accomplish the anchoring operation through liquid column pressure compressed air chamber in the pit, only need lift the tubular column during secondary operation simultaneously and can accomplish the oil drainage ability, saves the operating cost promptly, and the environmental protection operation can avoid unnecessary potential safety hazard again.

The utility model aims at realizing through following technical scheme, exempting from to release draining oil pipe anchor, including the top connection, an outer working barrel, a release section of thick bamboo goes up the cone, and the center tube, the slip cover, the slips, the spring, lower cone, adapter sleeve, stop collar, the lower clutch, its technical essential is:

a release piston is arranged between the working cylinder and the central pipe; the upper end of the release cylinder is arranged between the working cylinder and the release piston and is connected with the lower end of the release piston through an internal thread, the lower end of the release cylinder is connected with the upper end of the upper cone through the internal thread, a fixed piston is arranged between the release cylinder and the central pipe, a clamp spring is arranged in a clamp groove in the upper end of the fixed piston, and the lower end of the fixed piston is connected with the upper cone through a setting shear pin;

the upper end of the connecting sleeve is sleeved with a baffle ring, the upper end of the slip sleeve is sleeved at the lower end of the upper cone body, and the lower end of the slip sleeve is sleeved at the upper part of the baffle ring; the lower end of the connecting sleeve is connected with a limiting sleeve through external threads and sleeved at the upper end of the lower connector, a plurality of circular hole grooves are uniformly distributed on the lower connector, stop pins are placed in the circular hole grooves, and the outer ends of the stop pins are placed between the lower end of the connecting sleeve 1 and the limiting sleeve;

and a pressure cavity is arranged between the release piston and the release cylinder, between the release piston and the central tube, and between the release piston and the central tube and between the release cylinder and the central tube and between the release piston and the central tube, a pressure cavity is arranged.

Further, the use method of the release-free oil drainage tubing anchor comprises the following steps: the upper joint is connected to the lower end of the oil pipe, and the lower joint is connected to the upper end of the pump head; after the release-free oil drainage tubing anchor is lowered to a specified position along with a tubing string, a release piston is pushed to push downwards to drive an upper cone to move downwards to push a slip to open outwards through the pressure of a hydrostatic column in the tubing string, the inner wall of a casing is bitten, the tubing string is anchored, and at the moment, internal thread teeth of a release cylinder are meshed with external thread teeth of a clamp spring, so that the release cylinder cannot retract; when the pipe column is lifted in the secondary operation, a certain load of the pipe column is lifted to drive components such as an upper joint of a tool and a central pipe, a stop pin is cut off, a lower cone moves downwards along with a connecting sleeve, a slip retracts to complete deblocking, meanwhile, when the central pipe moves upwards, an oil drainage hole of the central pipe moves upwards to leak, an oil sleeve annulus is communicated, and the oil drainage function is achieved.

The utility model has the advantages that:

(1) in order to prevent the creep of the oil pipe, the tool has an anchoring function, the normal hydraulic anchoring tool needs to be pressed by a tank car, and the tool can release anchoring without pressing by the tank car. A pressure cavity (K) structure is arranged in the tool, and the slips are opened under the action of pressure generated by the hydrostatic column on the release piston, so that the anchoring function is realized, the pressing process is saved, and the operation cost and time are saved.

(2) When the pump is started, the tool can enable residual oil in the oil pipe to be discharged into the oil sleeve annulus through lifting simple operation, and the operation condition of a wellhead is improved. The operation time is shortened, the working efficiency is improved, the operation cost is reduced, and the requirement of field production of the oil field is met. The tool is simple in structure, can be unsealed by lifting, achieves the oil drainage function, and is simple, safe and reliable to operate and time-saving.

Drawings

FIG. 1 is a schematic structural view of the release-free oil drainage tubing anchor;

FIG. 2 is a schematic structural view of the slip cover;

FIG. 3 is a top view of the slip;

FIG. 4 is a cross-sectional view of the slip of FIG. 3;

FIG. 5 is a vertical half-sectional view of the slip of FIG. 3

FIG. 6 is a schematic view of the lower adapter structure;

FIG. 7 is a schematic structural view of the lower joint provided with a round hole groove II;

FIG. 8 is a schematic view of the configuration of the internal thread teeth in the release cartridge;

FIG. 9 is a schematic view of the structure of the external thread of the clamp spring;

fig. 10 is a schematic structural diagram of the snap spring.

See fig. 1-10 for specific names of the structures: the device comprises an upper connector 1, a release piston 2, an outer working barrel 3, a release barrel 4, internal thread teeth 4-1, a clamp spring 5, external thread teeth 5-1, a fixed piston 6, a setting shear pin 7, an upper cone 8, a central pipe 9, a slip sleeve 10, a circular hole groove I10-1, a spring 11, a slip 12, a slip inner circular hole groove 12-1, a lower cone 13, a baffle ring 14, a connecting sleeve 15, a limiting sleeve 16, a lower connector 17, a circular hole groove II 17-1 and a baffle pin 18.

Detailed Description

Referring to fig. 1-10, the release-free oil drainage tubing anchor of the embodiment has a specific structure that includes an upper joint 1, an outer working barrel 3, a release barrel 4, an upper cone 8, a central tube 9, a slip sleeve 10, a spring 11, a slip 12, a lower cone 13, a connecting sleeve 15, a limiting sleeve 16, and a lower joint 17.

The upper joint 1 is connected with a central pipe 9 through internal threads, the upper joint 1 is connected with an external working barrel 3 through external threads, and a release piston 2 is arranged between the working barrel 3 and the central pipe 9; the upper end of the release cylinder 4 is arranged between the working cylinder 3 and the release piston 2 and is connected with the lower end of the release piston 2 through an internal thread, the lower end of the release cylinder 4 is connected with the upper end of an upper cone 8 through an internal thread, an internal thread 4-1 (shown in figure 8) is arranged on the inner side of the main body of the release cylinder 4, a fixed piston 6 is arranged between the release cylinder 4 and a central tube 9, a clamp spring 5 is arranged in a clamping groove at the upper end of the fixed piston 6, and an external thread 5-1 (shown in figure 9) is arranged on the clamp spring 5; the lower end of the piston 6 is connected with an upper cone 8 through a setting shear pin 7; the internal thread 4-1 of the release cylinder 4 can be meshed with the external thread 5-1 of the clamp spring 5;

the slip 12 (shown in figures 3-5) is arranged between the upper cone 8 and the lower cone 13, the spring 11 is arranged in a circular hole groove I10-1 (shown in figure 10) in the slip sleeve 10, a baffle ring 14 is sleeved at the upper end of the connecting sleeve 15, and the upper end of the slip sleeve 10 is sleeved at the lower end of the upper cone 8 and the upper part of the baffle ring 14 is sleeved at the lower end of the upper cone; the lower end of the connecting sleeve 15 is connected with a limiting sleeve 16 through external threads and sleeved with the upper end of a lower connector 17, a plurality of circular hole grooves II 17-1 (shown in figure 7) are uniformly distributed on the lower connector 17, a stop pin 18 is placed in the circular hole grooves II 17-1, and the outer end of the stop pin 18 is placed between the lower end of the connecting sleeve 15 and the limiting sleeve 16;

a pressure cavity K (shown in figure 1) is arranged between the release piston 2 and the release cylinder 4, between the fixed piston 6 and between the central pipes 9;

and an oil drainage hole B is formed in the lower part of the central tube 9, and the oil drainage hole B before the secondary operation pipe lifting is positioned on the inner side of the lower cone.

Assembling the release-free oil drainage tubing anchor:

after the clamp spring 5 is placed into the fixed piston 6, the clamp spring penetrates from the upper part of the central tube 9 and is in threaded connection, the release piston 2 and the release cylinder 4 are in threaded connection and also penetrate into the central tube 9, and the upper joint 1 and the outer working cylinder 3 are in threaded connection and then are in threaded connection with the central tube 9. The upper cone 8 is placed into the slip sleeve 10 (figure 2), the spring 11 is placed into a round hole groove 12-1 in a slip after being smeared with grease (figure 3), then is placed into a window opening position in the slip sleeve 10 (figure 2) together, then is placed into the lower part of the central tube 9, then penetrates through the lower cone 13, the baffle ring 14 is in threaded connection with the slip 10, the lower joint 17 is in threaded connection with the lower part of the central tube 9, then penetrates into the connecting sleeve 15 and is in threaded connection with the lower cone 13, the baffle pin 18 is placed into a round groove of the lower joint 17 (figure 4), and finally penetrates into the limiting sleeve 16 and the connecting sleeve 15. The steps form the release-free oil drainage tubing anchor.

The principle of the release-free oil drainage tubing anchor is as follows:

the field installation and connection mode of the structure is as follows: the upper joint 1 is connected to the lower end of the oil pipe, and the lower joint 17 is connected to the upper end of the pump head.

After the tool goes down to a specified position along with the pipe column, the releasing piston 2 is pushed to push downwards (as a K cavity forms an air pressure cavity under the sealing of an O-shaped ring, figure 1) through the pressure of a hydrostatic column in the pipe, an upper cone 8 is driven to move downwards to push a slip 12 to open outwards to bite the inner wall of a casing pipe, so that the pipe column is anchored, and at the moment, an inner thread 4-1 of a releasing cylinder 4 is meshed with an outer thread 5-1 of a clamp spring 5, so that the releasing cylinder 4 cannot retract, and the meshing force of the clamp spring 5 and the inner wall of the casing pipe is kept. If the pressure of the underground hydrostatic column is insufficient, the pipeline can be closed to suppress pressure during the trial pumping of the pumping unit in the releasing process, the anchoring is released, and the pressing link is saved. Normal oil pumping production can be realized after anchoring.

When the pipe column is lifted in the secondary operation, a certain load of the pipe column is lifted to drive components such as the tool upper joint 1 and the central pipe 9, the stop pin 18 is cut off, the lower cone 13 moves downwards along with the connecting sleeve 15, the slip 12 retracts to complete deblocking, meanwhile, when the central pipe 9 moves upwards, the oil drainage hole B (shown in figure 1) moves upwards to leak, at the moment, the oil sleeve annulus is communicated, oil in the pipe is drained into the oil sleeve annulus, and the oil drainage function is achieved. Wherein the hole A in figure 1 is a liquid inlet hole drilled on the central tube, and the liquid in the central tube enters the pushing release piston 2 through the hole under the pressure of the hydrostatic column to press the air pressure cavity K.

Claims (1)

1. Release-free oil drainage tubing anchor, including the top connection, outer work section of thick bamboo, release section of thick bamboo, go up the cone, the center tube, the slip cover, the slips, the spring, lower cone, adapter sleeve, stop collar, lower clutch, characterized by:

a release piston is arranged between the working cylinder and the central pipe; the upper end of the release cylinder is arranged between the working cylinder and the release piston and is connected with the lower end of the release piston, the lower end of the release cylinder is connected with the upper end of the upper cone, inner thread teeth are arranged on the inner side of the main body of the release cylinder, a fixed piston is arranged between the release cylinder and the central pipe, a clamp spring is arranged in a clamp groove in the upper end of the fixed piston, the clamp spring is provided with outer thread teeth, and the lower end of the fixed piston is connected with the upper cone through a setting shear pin; the upper end of the connecting sleeve is sleeved with a baffle ring, the upper end of the slip sleeve is sleeved at the lower end of the upper cone body, and the lower end of the slip sleeve is sleeved at the upper part of the baffle ring; the lower end of the connecting sleeve is connected with the limiting sleeve and sleeved with the upper end of the lower connector, a plurality of circular hole grooves are uniformly distributed on the lower connector, the stop pins are placed in the circular hole grooves, and the outer ends of the stop pins are placed between the lower end of the connecting sleeve and the limiting sleeve; and a pressure cavity is arranged between the release piston and the release cylinder, between the release piston and the central tube, and between the release piston and the central tube and between the release cylinder and the central tube and between the release piston and the central tube, a pressure cavity is arranged.

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