CN220015122U - Self-drift diameter drilling-free grading hoop - Google Patents

Abstract

The utility model discloses a self-drift diameter drilling-free grading hoop, which is characterized in that a closing sleeve and a limiting baffle ring are sleeved outside a central tube, the limiting baffle ring is fixedly connected with the central tube through a first shearing force piece, the closing sleeve is fixedly arranged in the central tube through a second shearing force piece, a first liquid inlet hole is formed in the surface of the central tube at the position of the closing sleeve, a locking block clamped into a limiting chute is fixedly arranged on the inner wall of the central tube, and a clamping spring is arranged on the outer side of the locking block. The utility model has simple operation, the sliding plug falls onto the opening plug seat to seal the opening plug seat, the well is continuously pressurized at the moment, the third shearing force piece on the opening plug seat is broken, the second liquid inlet hole is leaked, and the second-stage well cementation can be performed at the moment; and after the cement paste is injected into the secondary well cementation, the closing plug seat is released to be closed, the closing plug seat is clamped on the locking block, the first liquid inlet hole is leaked out, the outside is continuously pressed, the first shearing force piece breaks, the closing sleeve is downward, the clamp spring is released to realize the permanent closing of the first liquid inlet hole, and the closing plug seat is not limited by the locking block any more, so that the closing plug seat is convenient to fall off and recycle.

Description

Self-drift diameter drilling-free grading hoop

Technical Field

The utility model relates to the technical field of oil well exploitation equipment, in particular to a self-drift diameter drilling-free classifying hoop.

Background

The well cementation equipment mainly refers to cement heads, ball valves, rubber plugs, grading hoops, packers and the like, and the mechanical drilling-free grading hoops are one type of well cementation equipment, so that the operation of drilling the grading hoops inner sleeve after grading well cementation can be reduced, the well construction period is shortened, the sealing quality of a filling section is effectively improved, the exploitation life of an oil well is prolonged, and the comprehensive exploitation value of the oil well is improved.

However, when the prior classifying hoop is used, the classifying hoop needs to be replaced after primary well cementation, the efficiency is low, and the inner core sleeve of the classifying hoop is easy to be clamped in the hoop and not easy to fall off, so that the subsequent well cementation work is influenced.

Disclosure of Invention

The utility model aims to provide a self-drift diameter drilling-free grading hoop.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a from latus rectum exempts from to bore hierarchical hoop, includes the center tube, still includes spacing stop collar, closes the cover, closes the stopper seat, locking piece, jump ring, opens stopper seat, slip stop collar and slide plug, it establishes in the center tube outsidely to close cover and spacing stop collar all overlaps, spacing stop collar one end and close cover one end block, spacing stop collar passes through first shear force spare and center tube fixed connection, it passes through second shear force spare fixed mounting in the center tube to close the cover, first feed liquor hole has been seted up on the center tube surface in the position of closing the cover, it has seted up spacing spout to close cover surface middle part, center tube inner wall fixed mounting has the locking piece of card income spacing spout, installs the jump ring in the locking piece outside, close the cover inner wall middle part and seted up the round storage tank, open stopper seat and close inside the stopper seat through third shear force spare fixed mounting, slip stop collar fixed mounting is in the inside the stopper seat of closing, the stopper seat is used for sealing open to the stopper seat, center tube and close stopper seat surface and close in the third shear force spare position and open second feed liquor hole, it closes the stopper seat to be used for closing the stopper seat.

Preferably, the sliding plug is of a conical columnar structure, and a rubber ring is fixedly arranged at the thick end of the sliding plug.

Preferably, the inner wall of the plug opening seat is provided with an annular stepped groove, and the inner diameter of the annular stepped groove corresponds to the outer diameter of the rubber ring of the sliding plug.

Preferably, a sealing ring is arranged between the inner wall of the central tube and the closing plug seat.

Preferably, the first, second and third shear members are shear pins.

Compared with the prior art, the utility model has the advantages that:

the utility model has simple operation, can perform multiple cementing, after the primary cementing structure, the sliding plug is put into, falls onto the open plug seat to seal the open plug seat, and then continues to press in the well, the third shearing force piece on the open plug seat breaks and leaks out the second liquid inlet, and at the moment, secondary cementing can be performed;

the second-stage well cementation is completed, the closing plug is released after the cement paste is injected, the closing plug falls on the closing plug seat to close the closing plug seat, pressure is applied, the second shearing force piece breaks, the closing plug seat is driven to move downwards, the closing plug seat is clamped on the locking piece, the first liquid inlet hole is leaked out, the outside is continuously pressed, at the moment, the first shearing force piece breaks, the closing sleeve moves downwards, after the limiting position is reached, the clamping spring is released, the first liquid inlet hole is permanently closed, the closing plug seat is not limited by the locking piece any more, and the closing plug seat is convenient to fall off, so that the follow-up well cementation work is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a self-diameter drill-free grading collar of the present utility model;

FIG. 2 is a block diagram of a slide plug of the present utility model;

FIG. 3 is a schematic view of a slip plug plunging state;

FIG. 4 is a block diagram of the closure of the present utility model;

fig. 5 is a schematic diagram of the closing plug put-in state.

In the figure: 1 a central tube, 2 a first shear member, 3 a limit stop ring, 4 a second shear member, 5 a closing sleeve, 6 a closing plug seat, 7 a sealing ring, 8 a locking block, 9 a clamp spring, 10 an opening plug seat, 11 a third shear member, 12 a sliding stop ring, 13 a sliding plug, 14 a limit chute, 15 a first liquid inlet hole, 16 a second liquid inlet hole, 17 a closing plug and 18 a storage groove.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 1 and 2, the utility model provides a self-drift diameter drilling-free classifying hoop, which comprises a central tube 1, and further comprises a limiting stop ring 3, a closing sleeve 5, a closing plug seat 6, a locking piece 8, a clamp spring 9, an opening plug seat 10, a sliding stop ring 12, a sliding plug 13 and a sliding plug, wherein the closing sleeve 5 and the limiting stop ring 3 are sleeved outside the central tube 1, one end of the limiting stop ring 3 is clamped with one end of the closing sleeve 5, the limiting stop ring 3 is fixedly connected with the central tube 1 through a first shear member 2, the closing sleeve 5 is fixedly installed in the central tube 1 through a second shear member 4, a first liquid inlet hole is formed in the position of the closing sleeve 5 on the surface of the central tube 1, a limiting slide groove 14 is formed in the middle of the outer surface of the closing sleeve 5, a locking piece 8 clamped into the limiting slide groove 14 is fixedly installed on the inner wall of the central tube 1, the clamp spring 9 is installed on the outer side of the locking piece 8, a circle of storage groove 18 is formed in the middle of the inner wall of the closing sleeve 5, after the closing plug seat 6 moves downwards, the clamp spring 9 is contained, thereby the locking piece 8 is prevented from being influenced, the locking piece 8 is separated from the locking piece 8, the sliding plug seat 6 is arranged on one side of the sealing seat 6, and is simultaneously, the sliding plug seat 6 is arranged at one side of the sealing seat 6, the sliding plug seat 6 is inclined, the sliding plug seat 6 is used for being opened in the sliding plug seat 6, and is arranged at the position 6, and is fixed in the position of the sealing seat 6, and is fixed in the position through the sealing seat 10, and the sealing plug seat 10, and the sealing seat 10 is arranged at the end, and the end seat 10 is fixed at the end, and the end is through the position of the sealing plug seat 6.

In this embodiment, the sliding plug 13 has a conical columnar structure, and a rubber ring is fixedly mounted at the thick end thereof.

In this embodiment, an annular stepped groove is formed in the inner wall of the plug opening seat 10, and the inner diameter of the annular stepped groove corresponds to the outer diameter of the rubber ring of the sliding plug 13.

In this embodiment, a sealing ring 7 is disposed between the inner wall of the central tube 1 and the closing plug seat 6.

In this embodiment, the first shear member 2, the second shear member 4 and the third shear member 11 are all shear nails.

Referring to fig. 3, the operation steps are as follows: after the primary well cementation structure, the sliding plug 13 is put into, the sliding plug 13 falls onto the open plug seat 10 to seal the open plug seat 10, the well is continuously pressurized at the moment, the third shear member 11 on the open plug seat 10 is broken, the second liquid inlet 16 is leaked, and the secondary well cementation can be performed at the moment;

referring to fig. 5, after the cement paste is injected into the secondary well, the closing plug 17 is released, the closing plug 17 falls on the closing plug seat 6 to close the closing plug seat, pressure is applied, the second shear member 4 breaks, the closing plug seat 6 is driven to move downwards, the closing plug seat 6 is clamped on the locking block 8, the first liquid inlet hole 15 leaks out, the outside is continuously pressed, at the moment, the first shear member 2 breaks, the closing sleeve 5 moves downwards, after the limit position is reached, the clamp spring 9 is released to permanently close the second liquid hole 16, and the closing plug seat 6 is not limited by the locking block 8.

Although the embodiments of the present utility model have been described with reference to the accompanying drawings, the patentees may make various modifications or alterations within the scope of the appended claims, and are intended to be within the scope of the utility model as described in the claims.

Claims (5)

1. The utility model provides a from latus rectum exempts from to bore hierarchical hoop, includes center tube, its characterized in that: still including spacing stop ring, close the cover, close the stopper seat, the latch segment, jump ring, open stopper seat, slip stop, slide stopper and close the stopper, close cover and spacing stop ring all cover and establish outside the center tube, spacing stop ring one end and close cover one end block, spacing stop ring passes through first shear force spare and center tube fixed connection, it passes through second shear force spare fixed mounting to close the cover in the center tube, the center tube surface is located and closes the cover position and seted up first feed liquor hole, close the cover surface middle part and seted up spacing spout, center tube inner wall fixed mounting has the latch segment of card income spacing spout, installs the jump ring in the latch segment outside, close the cover inner wall middle part and seted up the round and accomodate the groove, open stopper seat and pass through third shear force spare fixed mounting and close inside the stopper seat, slip stop ring fixed mounting closes the inside end position of stopper seat, the center tube is used for closing and opens the stopper seat, second feed liquor hole has been seted up in third shear force spare position to close the stopper surface and is used for closing the stopper seat.

2. A self-diameter drill-free grading collar as in claim 1 wherein: the sliding plug is of a conical columnar structure, and a rubber ring is fixedly arranged at the thick end of the sliding plug.

3. A self-diameter drill-free grading collar as in claim 1 wherein: the inner wall of the plug opening seat is provided with an annular stepped groove, and the inner diameter of the annular stepped groove corresponds to the outer diameter of the rubber ring of the sliding plug.

4. A self-diameter drill-free grading collar as in claim 1 wherein: and a sealing ring is arranged between the inner wall of the central tube and the closing plug seat.

5. A self-diameter drill-free grading collar as in claim 1 wherein: the first shear member, the second shear member and the third shear member are shear nails.