CN202441324U

CN202441324U - Composite rubber plug of oil well

Info

Publication number: CN202441324U
Application number: CN201220063408XU
Authority: CN
Inventors: 周军明
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-21
Filing date: 2012-02-21
Publication date: 2012-09-19
Anticipated expiration: 2022-02-21

Abstract

The utility model relates to the technical field of oil well completion tail pipe rubber plug, and in particular relates to a composite rubber plug of oil wells. The composite rubber plug comprises an upper connector, a rubber plug, a ball base and a lower connector, wherein the inner side of the lower end of the upper connector is fixedly installed with the outer side of the upper end of the rubber plug by using a shear pin; a stair-shaped through hole which is wide up and narrow down is formed inside the rubber plug; the ball base is fixedly installed at the inner side of the lower part of the rubber plug by using a ball base pin; the outer side of the lower end of the rubber plug and the inner side of the upper end of the lower connector are fixedly installed together; at least two radial through holes are formed on the lower connector; and a boss which can ward off the ball base is arranged at the inner side of the lower end of the lower connector. The composite rubber plug is reasonable in structure and convenient to use; by installing the ball base inside the rubber plug, the ball base which is connected below a tail pipe suspensor is replaced, so that the cost is reduced and the installation is convenient.

Description

The oil well Compounded rubber plug

Technical field

The utility model relates to oilfield well completion tail pipe plug technical field, is a kind of oil well Compounded rubber plug.

Background technology

The completion mode of horizontal well is mainly cutting seam sieve tube completion, well cementation completion and barefoot completion; When routine was implemented the tail pipe operation, the bottom of the center-pole of extension hanger suspension tail pipe plug was connected to the ball seat that cooperates the tail pipe plug to use in the bottom of hanger, and installing and using of ball seat makes extension hanger complex structure, inconvenient installation.

Summary of the invention

The utility model provides a kind of oil well Compounded rubber plug, has overcome the deficiency of above prior art, and it can effectively solve extension hanger complex structure, the problem of inconvenient installation.

The technical scheme of the utility model realizes like this: a kind of oil well Compounded rubber plug comprises top connection, plug, ball seat and lower contact; The inboard outside, upper end with plug, the lower end of top connection is fixedly installed togather through shear pin; Plug inside has and is step-like through hole wide at the top and narrow at the bottom; Ball seat is installed in the lower inside of plug through the ball seat dowel fixes; The inboard, upper end of the lower outside of plug and lower contact is fixedly installed togather, and at least two radial direction through hole are arranged in lower contact, in the inboard, lower end of lower contact the boss that can block ball seat is arranged.

External upper with upper ball base has annular seal groove, in seal groove, is installed with sealing ring.

More than the inside of the top connection corresponding with plug the seal groove of annular is arranged, in seal groove, be installed with sealing ring.

Be fixedly installed togather through screw thread with the lower outside of top cement plug and the inboard, upper end of lower contact.

The utility model is rational in infrastructure, and is easy to use, through ball seat is installed in plug, can substitute the extension hanger seat of receiving in the bottom; Therefore reduced cost, be convenient to install.

Description of drawings

Fig. 1 looks the half section structural representation for the master of the utility model.

Coding among the figure is respectively: 1 is top connection, and 2 is plug, and 3 is ball seat, and 4 are lower contact, and 5 is shear pin, and 6 is through hole, and 7 are the ball seat pin, and 8 is radial direction through hole, and 9 is boss, and 10 is sealing ring.

The specific embodiment

As shown in Figure 1, a kind of oil well Compounded rubber plug comprises top connection 1, plug 2, ball seat 3 and lower contact 4; The inboard outside, upper end with plug 2, the lower end of top connection 1 is fixedly installed togather through shear pin 5; Plug 2 inside have and are step-like through hole 6 wide at the top and narrow at the bottom; Ball seat 3 is fixedly mounted on the lower inside of plug 2 through ball seat pin 7; The inboard, upper end of the lower outside of plug 2 and lower contact 4 is fixedly installed togather, and at least two radial direction through hole 8 are arranged in lower contact 4, and the boss 9 that can block ball seat 3 is arranged in the inboard, lower end of lower contact 4.At first the upper end of top connection 1 is connected G.I.H with the center-pole lower end of extension hanger during use; Spheroid is arrived ball seat 3 along the through hole 6 of plug 2, build the pressure then up to ball seat pin 7 is cut off, ball seat 3 is because the pressure effect; Move down boss 9 places up to lower contact 4; At this moment radial direction through hole 8 is connected with through hole 6, implements the cementing well operation, squeezes into the drilling rod plug after the cemented up again and promotes plug 2; Cutting off shear pin 5 walks to implement downwards to accomplish well cementing operation at last for the slurry operation.

As shown in Figure 1, in order to increase sealing, the seal groove of annular is arranged in the external upper of ball seat 3, in seal groove, be installed with sealing ring 10.

As shown in Figure 1, in order to increase sealing, there is the seal groove of annular the inside of the top connection 1 corresponding with plug 2, in seal groove, is installed with sealing ring 10.

As shown in Figure 1, the inboard, upper end of the lower outside of plug 2 and lower contact 4 is fixedly installed togather through screw thread.

Claims

1. an oil well Compounded rubber plug is characterized in that comprising top connection (1), plug (2), ball seat (3) and lower contact (4); The inboard outside, upper end with plug (2), the lower end of top connection (1) is fixedly installed togather through shear pin (5); Plug (2) inside has and is step-like through hole wide at the top and narrow at the bottom (6); Ball seat (3) is fixedly mounted on the lower inside of plug (2) through ball seat pin (7); The inboard, upper end of the lower outside of plug (2) and lower contact (4) is fixedly installed togather, and at least two radial direction through hole (8) are arranged in lower contact (4), and the boss (9) that can block ball seat (3) is arranged in the inboard, lower end of lower contact (4).

2. oil well Compounded rubber plug according to claim 1 is characterized in that the external upper of ball seat (3) has annular seal groove, in seal groove, is installed with sealing ring (10).

3. oil well Compounded rubber plug according to claim 1 and 2 is characterized in that there is annular seal groove the inside of the top connection (1) corresponding with plug (2), in seal groove, is installed with sealing ring (10).

4. oil well Compounded rubber plug according to claim 1 and 2 is characterized in that the lower outside of plug (2) and the inboard, upper end of lower contact (4) are fixedly installed togather through screw thread.

5. oil well Compounded rubber plug according to claim 3 is characterized in that the lower outside of plug (2) and the inboard, upper end of lower contact (4) are fixedly installed togather through screw thread.