CN105178907A - Compression packer sealing structure - Google Patents

Abstract

The invention relates to a sealing structure of a compression packer, which comprises an oil pipe, a protection block, a hoop, a pressure block, a sealing sleeve and a sealing rubber cylinder, and the protection block, the pressure block and the sealing rubber cylinder are all fixed on the outer surface of the oil pipe On the circle, a pressure block is respectively installed on both sides of the sealing rubber cylinder, a protection block is respectively installed on the outside of the two pressure blocks, a hoop is set on the protection block, the sealing sleeve is installed on the protection block, the hoop, The pressure block and the outer side of the sealing rubber cylinder, the oil pipe is located in the center of the sealing rubber cylinder. The invention effectively controls the compressed flow of the sealing rubber cylinder by adding the design of the protection block. At the same time, the structure of the sealing rubber cartridge can form a two-stage seal after compression, effectively increasing the sealing performance of the compression packer.

Description

Compression packer sealing structure

technical field

The invention relates to a compression packer sealing structure.

Background technique

The main function of the packer in oil production is to isolate the production layer, separate water injection, etc., and its sealing performance plays a key role in the performance of the packer. Most of the existing packers only rely on the radial expansion of the rubber tube to ensure sealing, which often results in poor sealing effect or even damage to the rubber tube.

Contents of the invention

Aiming at the actual needs of existing projects, the present invention designs a compression packer sealing structure, which can not only effectively improve the sealing effect of the packer, but also increase the service life of the sealing part of the packer.

To achieve the above object, the present invention adopts the following technical solutions:

A compression packer sealing structure, including oil pipe, protection block, hoop, pressure block, sealing sleeve and sealing rubber cylinder, and the protection block, pressure block and sealing rubber cylinder are all fixed on the outer circle of the oil pipe, A pressure block is respectively installed on both sides of the sealing rubber cylinder, a protection block is respectively installed on the outside of the two pressure blocks, and a hoop is set on the protection block, and the sealing sleeve is installed on the protection block, the hoop, the pressure block and the protection block. On the outside of the sealant cartridge, the oil pipe is located in the center of the sealant cartridge.

The protective block is in the shape of a quarter circular column, and every four pieces of the protective block are completely wrapped on the outer circle of the oil pipe; the outer side of the protective block is provided with a rectangular groove, and the bottom is provided with a tapered surface. Position the hoop so that the four protective blocks fit snugly against the outside of the tubing.

The upper end surface of the briquetting block is provided with a briquetting conical surface with a taper of 40-50 degrees. The conical surface of the briquetting block matches the conical surface of the protection block. When the hoop of the protection block is broken, the protection block will move along the The cone slides down.

There are two arc-shaped grooves at the upper and lower ends of the inner side of the sealing rubber cylinder, and four circular holes distributed at 90 degrees in the middle; the sealing rubber cylinder expands radially under the action of the pressing block to seal the oil pipe and seal The annular space between the sleeves; the arc-shaped groove and the round hole make the sealing rubber cylinder divided into upper and lower sealing parts when it is compressed, so as to increase the sealing stress of the sealing rubber cylinder.

Compared with prior art, the present invention has following advantage:

The invention effectively controls the compressed flow of the sealing rubber cylinder by adding the design of the protection block. At the same time, the structure of the sealing rubber cartridge can form a two-stage seal after compression, effectively increasing the sealing performance of the compression packer.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the device of the present invention.

Fig. 2 is a schematic diagram of the principle of the protection block.

Figure 3 is a schematic diagram of the principle of the compact.

Fig. 4 is a schematic diagram of the principle of the sealing rubber cartridge.

Detailed ways

The preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, a compression packer sealing structure includes oil pipe I, protection block II, hoop III, pressure block IV, sealing sleeve V and sealing rubber cylinder VI, the protection block II, pressure block Both IV and sealing rubber cartridge VI are fixed on the outer circle of oil pipe I, and a pressing block IV is respectively installed on both sides of sealing rubber cartridge VI, and protective block II is respectively installed on the outer sides of the two pressing blocks IV, and on the protective block II The hoop III is sleeved, and the sealing sleeve V is installed on the outside of the protection block II, the hoop III, the pressure block IV and the sealing rubber cylinder VI, and the oil pipe I is located at the center of the sealing rubber cylinder VI.

As shown in Figure 2, the protection block II is in the shape of a quarter circular column, and every four pieces of the protection block II are completely wrapped on the outer circle of the oil pipe I; the outside of the protection block II is provided with a rectangular groove II-1 , the bottom is provided with a tapered surface II-2, and the hoop III is placed in the rectangular groove II-1, so that the four protective blocks II are tightly attached to the outside of the oil pipe I.

As shown in Figure 3, the upper end surface of the pressure block IV is provided with a pressure block cone surface IV-1 with a taper of 40-50 degrees, and the pressure block cone surface IV-1 is in phase with the conical surface II-2 of the protection block II. Matching, when the hoop III of the protection block II is broken, the protection block II will slide down along the pressure block cone surface IV-1.

As shown in Figure 4, two arc-shaped grooves VI-1 are provided at the upper and lower ends of the inner side of the sealing rubber cylinder VI, and four round holes VI-2 are opened in the middle part at intervals of 90 degrees; the sealing rubber cylinder VI is in the Under the action of the pressing block IV, it expands radially to seal the annular space between the oil pipe I and the sealing sleeve V; the arc-shaped groove VI-1 and the circular hole VI-2 make the sealing rubber cylinder VI divided into upper and lower parts when compressed. The sealing part increases the sealing stress of the sealing rubber cylinder VI.

The working principle of the present invention is as follows:

When the protection block II has a tendency to slide down along the cone surface IV-1 of the pressure block under the action of pressure, after the radial component force breaks the hoop III, the protection block II slides freely along the cone surface IV-1 of the pressure block until the protection block The outer cylindrical surface of II touches the inner wall of sealing sleeve V, thereby blocking the annular space between oil pipe I and sealing sleeve V. The axial component force of the sliding protection block II acts on the pressure block IV, and the pressure block IV starts to compress the sealing rubber cylinder VI in the axial direction, and the sealing rubber cylinder VI expands radially under the action of the axial pressure until it touches the sealing sleeve V The inner wall of the sealing rubber cylinder VI, the axial flow of the sealing rubber cylinder VI will be blocked by the lower end surface of the sliding protection block II, thereby protecting the axial direction of the sealing rubber cylinder VI from being torn and damaged, and at the same time strengthening the sealing rubber cylinder VI and the sealing sleeve The contact stress between cylinders V ensures the sealing effect.

Claims (4)

1. a compression packer hermetically-sealed construction, comprise oil pipe (I), protection block (II), garter spring (III), briquetting (IV), seal sleeve (V) and cartridge (VI), it is characterized in that: described protection block (II), briquetting (IV) and cartridge (VI) are all fixed on the cylindrical of oil pipe (I), a briquetting (IV) is installed respectively in the both sides of cartridge (VI), protection block (II) is installed respectively in the outside of two briquettings (IV), garter spring (III) is had at the upper cover of protection block (II), described seal sleeve (V) is arranged on protection block (II), garter spring (III), the outside of briquetting (IV) and cartridge (VI), oil pipe (I) is positioned at the center of cartridge (VI).

2. compression packer hermetically-sealed construction according to claim 1, is characterized in that: described protection block (II) is quadrant annulated column shape, and every four described protection block (II) complete packet are rolled on the cylindrical of oil pipe (I); Protection block (II) outside is provided with rectangular channel (II-1), and bottom is provided with taper surface (II-2), places garter spring (III) in described rectangular channel (II-1), makes four outsides protecting block (II) to be close to oil pipe (I).

3. compression packer hermetically-sealed construction according to claim 1; it is characterized in that: described briquetting (IV) upper surface is provided with the briquetting conical surface (IV-1) that a tapering is 40-50 degree; the briquetting conical surface (IV-1) matches with the taper surface (II-2) of protection block (II); after the garter spring (III) of protection block (II) is broken, protection block (II) will be glided along the briquetting conical surface (IV-1).

4. compression packer hermetically-sealed construction according to claim 1, is characterized in that: described cartridge (VI) inner side is provided with two deep-slotted chip breakers (VI-1) in two ends up and down, and middle part has the circular hole (VI-2) of four 90 degree of distributions of being separated by; Described cartridge (VI) is under the effect of briquetting (IV), and expanded radially seals the annular space between oil pipe (I) and seal sleeve (V); Described deep-slotted chip breaker (VI-1) and circular hole (VI-2) are divided into upper and lower two hermetic units when cartridge (VI) is compressed, and improve the Sealing Stress of cartridge (VI).