CN219081545U - Well shaft blanking plug for throwing and fishing type operation under pressure - Google Patents

Abstract

The utility model discloses a shaft blanking plug for casting and fishing type under-pressure operation, which comprises a blanking plug main body, wherein the outer side of the lower end of the blanking plug main body is sleeved with a sliding ring in a sliding manner, the upper end of the sliding ring is fixedly connected with an extrusion ring, the outer side of the upper end of the blanking plug main body is sleeved with a positioning ring in a fixed manner, and both sides and front and rear sides of the positioning ring are provided with through holes, and the utility model has the beneficial effects that: according to the blanking plug, the sliding ring provided with the extrusion ring and the fixed ring provided with the rubber ring are arranged on the blanking plug main body, when the blanking plug is used, the sliding ring can be pulled by the pull rope to slide on the blanking plug main body, the extrusion ring is inserted into the clamping groove on the fixed ring, the rubber ring is extruded, the outer wall of the rubber ring is tightly abutted against the inner wall of a shaft, the sealing purpose is achieved, and when the blanking plug is used for fishing, the pull rope can be loosened, the extrusion ring is pulled out, the rubber ring is restored to the original state, friction between the rubber ring and the inner wall of the shaft is reduced, and the sealing effect is prevented from being seriously influenced by abrasion of the outer wall of the rubber ring.

Description

Well shaft blanking plug for throwing and fishing type operation under pressure

Technical Field

The utility model relates to the technical field of plugging devices, in particular to a shaft plugging device for a casting-in type pressurized operation.

Background

The pressurized operation is an advanced downhole operation technology for tripping a tubular column under the conditions of maintaining a certain pressure in a shaft, not killing the well and not releasing the pressure. Compared with the traditional underground operation, the under-pressure operation has the advantages that the under-pressure operation can realize the protection of hydrocarbon reservoirs and the environment to the greatest extent, is favorable for stable production after repairing hydrocarbon wells and improving water injection efficiency, and can normally use a throwing-in and fishing-out type blanking plug in the under-pressure operation, plugs a shaft through the throwing-in and fishing-out type blanking plug, and is convenient to operate afterwards.

At present, the casting and fishing type blanking plug is mostly made of rubber integrally, and is directly plugged into a shaft to be plugged when in use, so that the shaft is sealed, but in the plugging process, the outer wall is propped against the inner wall of the shaft only by the elastic force of the blanking plug, so that the sealing purpose is achieved, the parts are inconvenient to install and salvage, and when the parts are installed and salvaged, the outer wall of the blanking plug can generate certain friction with the inner wall of the shaft, the friction can cause the outer wall of the blanking plug to be worn to a certain extent, and when the wear reaches a certain extent, the outer wall of the blanking plug is difficult to be tightly stuck with the inner wall of the shaft, so that the sealing effect is poor.

Disclosure of Invention

The utility model aims to provide a shaft plug for casting and fishing type under-pressure operation, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: can throw and drag for formula area to press operation with pit shaft blanking plug, including blanking plug main part, the lower extreme outside cover of blanking plug main part is established and sliding connection has the sliding ring, the upper end fixedly connected with extrusion ring of sliding ring, the upper end outside cover of blanking plug main part is established and fixedly connected with holding ring, the through-hole has all been seted up to the both sides and the front and back side of holding ring, the middle part outside cover of blanking plug main part is established and fixedly connected with solid fixed ring, the draw-in groove has been seted up to gu the lower extreme periphery of solid fixed ring, the outside fixedly connected with rubber circle of draw-in groove, gu both sides and the front and back side of solid fixed ring all run through and sliding connection has the stay cord, the equal fixedly connected with of lower extreme of stay cord is on the sliding ring.

Preferably, the upper end of the outer side of the extrusion ring is obliquely arranged, and the outer diameter of the upper end of the extrusion ring is smaller than that of the lower end of the extrusion ring.

Preferably, the upper ends of the pull ropes penetrate through and are connected in the same-side through holes in a sliding mode, and the edges of the upper ends of the through holes are arc-shaped.

Preferably, the outer side of the upper end of the fixed ring is fixedly connected with a baffle ring, and the baffle ring is sleeved outside the upper end of the rubber ring.

Preferably, the outer side of the lower end of the blanking plug main body is sleeved with and fixedly connected with a sleeve block, and the upper end of the sleeve block is propped against the lower end of the slip ring.

Compared with the prior art, the utility model has the beneficial effects that: according to the blanking plug, the sliding ring provided with the extrusion ring and the fixed ring provided with the rubber ring are arranged on the blanking plug main body, when the blanking plug is used, the sliding ring can be pulled by the pull rope to slide on the blanking plug main body, the extrusion ring is inserted into the clamping groove on the fixed ring, the rubber ring is extruded, the outer wall of the rubber ring is tightly abutted against the inner wall of a shaft, the sealing purpose is achieved, and when the blanking plug is used for fishing, the pull rope can be loosened, the extrusion ring is pulled out, the rubber ring is restored to the original state, friction between the rubber ring and the inner wall of the shaft is reduced, and the sealing effect is prevented from being seriously influenced by abrasion of the outer wall of the rubber ring.

Drawings

FIG. 1 is a schematic view of the present utility model in a normal cut-away configuration;

FIG. 2 is an enlarged view of the area A in FIG. 1;

FIG. 3 is a schematic view of the present utility model in cross-section in use;

FIG. 4 is a schematic view of the external structure of the present utility model in normal condition;

fig. 5 is a schematic top view of the positioning ring of the present utility model.

In the figure: 1. a blanking plug body; 2. sleeving blocks; 3. a slip ring; 4. a pressing ring; 5. a positioning ring; 6. a through hole; 7. a fixing ring; 8. a clamping groove; 9. a rubber ring; 10. a baffle ring; 11. and (5) pulling the rope.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution: can throw and drag for formula area to press operation and use pit shaft blanking plug, including blanking plug main part 1, blanking plug main part 1's lower extreme outside cover is established and sliding connection has sliding ring 3, sliding ring 3's upper end fixedly connected with extrusion ring 4, blanking plug main part 1's upper end outside cover is established and fixedly connected with holding ring 5, through-hole 6 has all been seted up to the both sides and the front and back side of holding ring 5, blanking plug main part 1's middle part outside cover is established and fixedly connected with solid fixed ring 7, draw-in groove 8 has been seted up to gu the lower extreme periphery of solid fixed ring 7, gu outside fixedly connected with rubber circle 9 of draw-in groove 8, gu both sides and the front and back side of solid fixed ring 7 all run through and sliding connection has stay cord 11, gu the equal fixedly connected with of lower extreme of stay cord 11 is on sliding ring 3, can stimulate sliding ring 3 during the use and remove, conveniently insert extrusion ring 4 in draw-in groove 8, and extrude rubber circle 9.

The upper end outside fixedly connected with baffle ring 10 of solid fixed ring 7, baffle ring 10 cover is established in the upper end outside of rubber circle 9, be convenient for block the upper end of rubber circle 9, avoid rubber circle 9 to break away from gu fixed ring 7, the lower extreme outside cover of blanking plug main part 1 is established and fixedly connected with cover piece 2, the upper end of cover piece 2 supports the lower extreme at sliding ring 3, be convenient for prop sliding ring 3, fix sliding ring 3 on blanking plug main part 1, the outside upper end of extrusion ring 4 is the slope setting, the upper end external diameter ratio lower extreme external diameter of extrusion ring 4 is little, be convenient for insert extrusion ring 4 in draw-in groove 8, the upper end of stay cord 11 all runs through and sliding connection is in homonymy through-hole 6, the upper end edge of through-hole 6 all is the arc structure, when avoiding stay cord 11 to slide in through-hole 6, the edge scratch stay cord 11 of through-hole 6.

Specifically, when the utility model is used, the whole device is hung into a designated position in a shaft through a hanging device, then a pull rope 11 is pulled by a winding device, the pull rope 11 pulls the slip ring 3 upwards until the extrusion ring 4 on the slip ring 3 is inserted into the clamping groove 8 on the fixed ring 7, the extrusion ring 4 can continuously prop up the rubber ring 9 in the process, the outer wall of the rubber ring 9 is propped against the inner wall of the shaft to block the shaft, and then a worker can perform operation; when the utility model is needed to be fished, the pull rope 11 is loosened, the slip ring 3 moves downwards under the action of gravity and is put on the upper end of the sleeve block 2, the extrusion ring 4 is pulled out of the clamping groove 8, the rubber ring 9 is restored to the original state after losing the extrusion of the extrusion ring 4, and then the utility model can be fished out of the shaft through the hoisting equipment.

In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," "fourth" may explicitly or implicitly include at least one such feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. Can throw and drag for formula to take well shaft blanking plug of pressing operation, a serial communication port, including blanking plug main part (1), lower extreme outside cover of blanking plug main part (1) is established and sliding connection has sliding ring (3), the upper end fixedly connected with extrusion ring (4) of sliding ring (3), the upper end outside cover of blanking plug main part (1) is established and fixedly connected with holding ring (5), through-hole (6) have all been seted up to the both sides and the front and back side of holding ring (5), fixed ring (7) have been established and fixedly connected with to the middle part outside cover of blanking plug main part (1), draw-in groove (8) have been seted up at the lower extreme periphery of fixed ring (7), the outside fixedly connected with rubber circle (9) of draw-in groove (8), both sides and front and back side of fixed ring (7) all run through and sliding connection have stay cord (11), the equal fixedly connected with of lower extreme of stay cord (11) is on sliding ring (3).

2. The retrievable wellbore blanking plug for pressurized operations of claim 1, wherein: the upper end of the outer side of the extrusion ring (4) is obliquely arranged, and the outer diameter of the upper end of the extrusion ring (4) is smaller than that of the lower end.

3. The retrievable wellbore blanking plug for pressurized operations of claim 1, wherein: the upper ends of the pull ropes (11) penetrate through and are in sliding connection in the same-side through holes (6), and the edges of the upper ends of the through holes (6) are arc-shaped.

4. The retrievable wellbore blanking plug for pressurized operations of claim 1, wherein: the outer side of the upper end of the fixed ring (7) is fixedly connected with a baffle ring (10), and the baffle ring (10) is sleeved outside the upper end of the rubber ring (9).

5. The retrievable wellbore blanking plug for pressurized operations of claim 1, wherein: the blanking plug is characterized in that a sleeve block (2) is sleeved outside the lower end of the blanking plug main body (1) and fixedly connected with the lower end of the blanking plug main body, and the upper end of the sleeve block (2) abuts against the lower end of the slip ring (3).

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