CN210422562U - Removable oil pipe plug - Google Patents

Abstract

A retrievable oil pipe plug is characterized in that the lower part of a locking pipe is forked with the upper part of a releasing pipe, a locking ring seat is sleeved on the releasing pipe, a seat locking ring is fastened on an upper outer one-way tooth, the locking ring is positioned outside a reducing section of the upper part of the releasing pipe, a connecting locking ring is fastened on the locking pipe, the locking pipe and the releasing pipe are sleeved outside a central shaft, the lower part of the releasing pipe is sleeved on the connecting locking ring, a baffle ring is connected to the lower part of the releasing pipe, a shear pin seat is connected to the lower part of the central shaft, the connecting pipe is sleeved outside the releasing pipe and the shear pin seat, the locking ring seat is positioned below an upper internal thread of the connecting pipe, a deblocking shear pin penetrates through the connecting pipe and is inserted into the releasing pipe, the seat locking shear pin penetrates through the connecting pipe and is inserted into the shear pin seat, a plug is installed at the lower part of the connecting pipe, a rubber cylinder seat, a rubber cylinder and a cone are sleeved outside the, the upper part of the slip is hung in a hanging groove at the lower part of the slip support, and the lower part of the slip is placed in a conical groove at the upper part of the cone.

Description

Removable oil pipe plug

Technical Field

The utility model relates to a shutoff instrument that oil field oil well was used is a formula of can getting oil pipe blanking plug.

Background

In the process of repairing and lifting an oil pipe of an oil-water well, the pressure in the well is sometimes high, and well fluid is sprayed out of the oil pipe, so that the oil-water well cannot operate, and the operation can be continued only after the well killing construction is carried out on the oil-water well. The well killing is that high-density well killing fluid is injected into a shaft, so that the back pressure formed by the high-density well killing fluid in the shooting and opening section of the shaft is higher than the formation pressure. At present, when blowout occurs, a well head pressure is made to be zero by adopting a well killing method, and safe construction is realized. If the oil-water well needs well killing, the well killing construction workload can be increased, well killing equipment and materials are needed, the construction time is long, a large amount of manpower and material resources are consumed, the high-density well killing fluid can be poured to the stratum due to the fact that the back pressure of a shaft formed by the high-density well killing fluid is higher than the pressure of the stratum, the well killing fluid can damage the stratum, the yield of the oil well is reduced, the water injection amount of the water well is reduced, and the quick well repairing of the oil-water well cannot be realized. The oil recovery high-density well control hydraulic well control mode prevents well blowout from being possibly not implemented in time on site, and when the well being repaired has well blowout signs, well blowout accidents are easy to happen and great economic loss is caused.

Disclosure of Invention

The utility model aims at designing a can get formula oil pipe blanking plug, can block up the oil pipe lower part, prevent that well liquid from blowout in the oil pipe, do not need the kill job just can safe workover play oil pipe, reduce the operation process, prevent that the stratum is impaired, prevent to take place the blowout accident.

The purpose of the utility model is realized like this: a removable tubing plug comprises an upper connector, a central shaft, a slip holder, a locking pipe, slips, a cone, a rubber barrel seat, a seat seal lock ring, a lock ring seat, a release pipe, a deblocking shear pin, a connecting lock ring, a baffle ring, a seat seal shear pin, a shear pin seat, a connecting pipe and a plug, wherein the seat seal lock ring is provided with an opening, the outer ring of the seat seal lock ring can be enlarged when the seat seal lock ring is internally stressed, the inner wall of the seat seal lock ring is provided with one-way teeth, the connecting lock ring is provided with an opening, the outer ring of the connecting lock ring can be enlarged when the seat seal lock ring is internally stressed, the inner wall of the connecting lock ring is provided with one-way teeth, the lower part of the locking pipe is provided with upper and outer one-way teeth matched with the one-way teeth inside the seat seal lock ring, the upper and outer one-way teeth are arranged on the lower part of the locking pipe to form a strip shape, the lower part of the central shaft is provided with lower one-way, the outer diameter of the reducing section is equal to the inner diameter of the seat seal lock ring, the upper part of the release pipe is provided with a slot, the upper part of the release pipe is in a strip shape, the strip body at the lower part of the lock pipe is inserted into the slot, the strip body at the upper part of the release pipe is inserted into the sub-slot, the lock ring seat is sleeved on the release pipe, the seat seal lock ring is buckled on the upper outer one-way tooth), the seal lock ring is positioned outside the reducing section, the connecting lock ring is buckled on the lower outer one-way tooth, the lock pipe and the release pipe are sleeved outside the central shaft, the lower part of the release pipe is sleeved on the connecting lock ring, the baffle ring is connected at the lower part of the release pipe and supports the connecting lock ring, the shear pin seat is connected on the lower part thread of the central shaft, the connecting pipe is sleeved outside the release pipe and the shear pin seat is positioned below the upper part inner thread of the connecting pipe, the deblocking shear pin is inserted into the connecting pipe, the plug is installed in the lower part of the connecting pipe, so that a cavity is formed between the shear pin seat and the plug, the rubber cylinder seat, the rubber cylinder and the cone are sleeved outside the locking pipe, the lower part of the rubber cylinder seat is connected with the upper part of the connecting pipe, the seat seal locking ring is limited between the rubber cylinder seat and the locking ring seat, the slip support penetrates out of the central shaft, the slip support is connected with the upper part of the locking pipe, the lower part of the slip support is provided with a hanging groove, the upper part of the slip is hung in the hanging groove at the lower part of the slip support, the lower part of the slip is placed in a conical groove at the upper part of the cone, the slip can move radially when the distance between the cone and the slip support changes, and the lower.

The utility model has the advantages that: the anchoring and sealing device can anchor and seal an internal channel of an oil pipe after the oil pipe is placed at a preset position in the oil pipe, blocks the lower part of the oil pipe, prevents well fluid from being sprayed out of the oil pipe, can safely repair the well and lift the oil pipe without killing the well, reduces operation procedures, prevents a stratum from being damaged, prevents well blowout accidents, and has remarkable economic benefits.

Drawings

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

Figure 2 is a lower half-sectional view of the piece 4 of figure 1.

Figure 3 is a half sectional view of the member 11 of figure 1.

Detailed Description

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

The embodiment of the utility model comprises an upper connector 1, a central shaft 2, a slip holder 3, a locking pipe 4, a slip 5, a cone 6, a rubber cylinder 7, a rubber cylinder seat 8, a setting lock ring 9, a lock ring seat 10, a release pipe 11, a deblocking shear pin 12, a connecting lock ring 13, a baffle ring 14, a setting shear pin 15, a shear pin seat 16, a connecting pipe 17 and a plug 19, wherein the setting lock ring 9 is provided with an opening, the outer ring of the setting lock ring 9 can be enlarged when the internal stress is exerted, the inner wall of the setting lock ring 9 is provided with one-way teeth, the connecting lock ring 13 is provided with an opening, the outer ring of the connecting lock ring 13 can be enlarged when the internal stress is exerted, the inner wall of the connecting lock ring 13 is provided with one-way teeth, the lower part of the locking pipe 4 is provided with upper and outer one-way teeth 4-1 matched with the one-way teeth inside the setting lock ring 9, the part of the upper and outer one-way teeth 4-1 part of the, the lower part of the screw thread of the central shaft 2 is provided with a lower outer one-way tooth 2-1 matched with the one-way tooth inside the connecting lock ring 13, the upper end of the releasing pipe 11 is provided with a reducing section 11-1, the outer diameter of the reducing section 11-1 is equal to the inner diameter of the seat seal lock ring 9, the upper part of the releasing pipe 11 is provided with a slot 11-2, the upper part of the releasing pipe 11 is in a strip shape, the lower strip of the locking pipe 4 is inserted into the slot 11-2, the upper strip of the releasing pipe 11 is inserted into the sub slot 4-2, the lock ring seat 10 is sleeved on the releasing pipe 11, the seat seal lock ring 9 is buckled on the upper outer one-way tooth 4-1, the connecting lock ring 13 is buckled on the lower outer one-way tooth 2-1, the seal lock ring 9 is arranged outside the reducing section 11-1, the locking pipe 4 and the releasing pipe 11 are sleeved outside the central shaft 2, and the lower part of the releasing pipe 11, the stop ring 14 is connected with the lower part of the release pipe 11, the stop ring 14 holds the connecting lock ring 13, the shear pin seat 16 is connected with the lower thread of the central shaft 2, the connecting pipe 17 is sleeved outside the release pipe 11 and the shear pin seat 16, the lock ring seat 10 is positioned below the upper internal thread of the connecting pipe 17, the deblocking shear pin 12 passes through the connecting pipe 17 and is inserted into the release pipe 11, the seated shear pin 15 passes through the connecting pipe 17 and is inserted into the shear pin seat 16, the plug 19 is arranged at the lower part of the connecting pipe 17, a cavity 18 is formed between the shear pin seat 16 and the plug 19, the rubber cylinder seat 8, the rubber cylinder 7 and the cone 6 are sleeved outside the locking pipe 4, the lower part of the rubber cylinder seat 8 is connected with the upper part of the connecting pipe 17, the seated seal 9 is limited between the rubber cylinder seat 8 and the lock ring seat 10, the slip holder 3 passes outside the central shaft 2, the slip holder 3 is connected with the upper part of the locking pipe 4, the lower part of the slip holder 3 is provided with a, the lower part of the slips 5 is put into a conical groove at the upper part of the cone 6, so that the slips 5 can move radially when the distance between the cone 6 and the slips holder 3 is changed, and the lower part of the upper joint 1 is connected with the upper part of the central shaft 2.

The utility model is put in the oil pipe from the well mouth, the water injection pipe is connected, the water is injected into the oil pipe to push the utility model to move downwards, the cavity 18 below the shear pin seat 16 is low pressure, the pressure difference born by the central shaft 2 from top to bottom when the utility model moves downwards to the design position (the required pressure difference is determined by the size and the material of the seat shear pin 15) causes the seat shear pin 15 to be cut off, the upper joint 1 and the central shaft 2, the slip support 3 moves downwards relatively, the distance between the slip support 3 and the cone 6 is shortened, the slip 5 is radially expanded and anchored on the inner wall of an oil pipe, the rubber sleeve 7 is compressed by pressure difference to block the lower part of the oil pipe, the rubber sleeve 7 is compressed and the anchoring state of the slip 5 is fixed by the setting lock ring 9 (the setting lock ring 9 only can move upwards but can not move downwards on the locking pipe 4), and the anchoring and sealing state can not be lost even when the pressure difference of the oil pipe is reduced, so that well fluid can not flow upwards, and blowout is prevented. Need will the utility model discloses during the time of taking out, connect 1 upwards drawing at the top connection with the instrument and make deblocking shear pin 12 broken by the stretch, under the effect of connecting catch 13, release pipe 11 goes upward along with the center pin, circular bead (toper circular bead) under the reducing section 11-1 on release pipe 11 upper portion gets into in seat catch 9, make seat catch 9 enlarge and throw off with locking pipe 4, cone 6, packing element 7 can be down, packing element 7 withdraws, the slips holds in the palm the distance grow between 3 and the cone 6, slips 5 withdraws the release anchor.

Claims (1)

1. The utility model provides a can get formula oil pipe blanking plug, holds in the palm (3), locking pipe (4), slips (5), cone (6), packing element (7), packing element seat (8), seat seal catch (9), catch seat (10), release pipe (11), deblocking shear pin (12), connection catch (13), keep off ring (14), seat seal shear pin (15), shear pin seat (16), connecting pipe (17), plug (19), characterized by including top connection (1), center pin (2), slips: the seat seal lock ring (9) is provided with an opening, the outer ring of the seat seal lock ring (9) can be enlarged when the inside is stressed, the inner wall of the seat seal lock ring (9) is provided with one-way teeth, the connecting lock ring (13) is provided with an opening, the outer ring of the connecting lock ring (13) can be enlarged when the inside is stressed, the inner wall of the connecting lock ring (13) is provided with one-way teeth, the lower part of the locking pipe (4) is provided with upper outer one-way teeth (4-1) matched with the inner one-way teeth of the seat seal lock ring (9), the part of the upper outer one-way teeth (4-1) at the lower part of the locking pipe (4) is provided with a split groove (4-2) to ensure that the lower part of the locking pipe (4) is in a strip shape, the lower outer one-way teeth (2-1) matched with the inner one-way teeth of the connecting lock ring (13) are arranged on the lower part of the central shaft (2), the upper end of the release pipe (11) is provided with a reducing section, the upper part of the release pipe (11) is provided with a slot (11-2) to enable the upper part of the release pipe (11) to be strip-shaped, the lower strip of the locking pipe (4) is inserted into the slot (11-2), the upper strip of the release pipe (11) is inserted into the slotted groove (4-2), the locking ring seat (10) is sleeved on the release pipe (11), the seat locking ring (9) is buckled on the upper outer one-way tooth (4-1), the connecting locking ring (13) is buckled on the lower outer one-way tooth (2-1), the locking ring (9) is positioned outside the reducing section (11-1), the locking pipe (4) and the release pipe (11) are sleeved outside the central shaft (2), the lower part of the release pipe (11) is sleeved and connected with the connecting ring (13), the baffle ring (14) is connected to the lower part of the release pipe (11), and the baffle ring (14) supports the locking ring (13), the shear pin seat (16) is connected to the lower thread of the central shaft (2), the connecting pipe (17) is sleeved outside the release pipe (11) and the shear pin seat (16), the lock ring seat (10) is positioned below the upper internal thread of the connecting pipe (17), the deblocking shear pin (12) penetrates through the connecting pipe (17) and is inserted into the release pipe (11), the seat sealing shear pin (15) penetrates through the connecting pipe (17) and is inserted into the shear pin seat (16), the plug (19) is installed at the lower part of the connecting pipe (17), a cavity (18) is formed between the shear pin seat (16) and the plug (19), the rubber cylinder seat (8), the rubber cylinder (7) and the cone (6) are sleeved outside the lock tube (4), the lower part of the rubber cylinder seat (8) is connected with the upper part of the connecting pipe (17), the seat sealing lock ring seat (9) is limited between the rubber cylinder seat sealing seat (8) and the lock ring seat (10), the slip holder (3) penetrates outside the central shaft (2), and the slip holder (3) is connected with the upper part of the lock ring seat locking pipe (, the lower part of the slip holder (3) is provided with a hanging groove, the upper part of the slip (5) is hung in the hanging groove at the lower part of the slip holder (3), the lower part of the slip (5) is placed in the conical groove at the upper part of the cone (6), the slip (5) can move radially when the distance between the cone (6) and the slip holder (3) changes, and the lower part of the upper joint (1) is connected with the upper part of the central shaft (2).

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