CN109931024A - A kind of slideway compression packer - Google Patents

Abstract

A kind of slideway compression packer, including top connection, the central tube being threadedly coupled with top connection, the adjustment ring being set on central tube, long packing element type, spacer ring, short rubber cylinder and set seat, it sets and is connected with connecting cylinder between the inner wall of seat and the outer wall of central tube lower end, the other end of connecting cylinder is connect with lower contact, it further include the flat key for connecting central tube and connecting cylinder, two or more uniformly distributed hook plate slot is equipped on adjustment ring and the outer wall for setting seat, the inner wall of connecting cylinder is equipped at least two uniformly distributed guide grooves, central tube lower end outer wall is equipped with the identical uniformly distributed keyway of quantity.A hook plate slot is arranged with an outer wall is set in adjustment ring, convenient for assembling packer；Part is few, and production cost is low；It by the guide groove on the keyway and connecting cylinder on flat key, central tube, above proposes and pushes top connection set and unsealed work with can be convenient, and guarantee that relative rotation does not occur for central tube and connecting cylinder, guarantee that packer performance is reliable and stable.

Description

A slideway compression packer

technical field

The invention relates to the technical field of packers, in particular to a slideway compression packer.

Background technique

At present, most of the packers used in oilfields have complex internal structures and many parts, which are very troublesome to process, manufacture and assemble, have high production costs, and are difficult to unpack and ensure performance.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects and deficiencies, the purpose of the present invention is to provide a slideway compression packer, which simplifies the manufacturing and assembling process, and ensures its performance.

For realizing above-mentioned technical task, the present invention adopts following technical scheme:

A slideway compression packer comprises an upper joint, a central pipe threadedly connected with the upper joint, an adjustment ring sleeved on the central pipe, a long rubber cylinder, a spacer ring, a short rubber cylinder and a setting seat. A connecting cylinder is connected between the inner wall of the seat and the outer wall of the lower end of the center tube, the other end of the connecting cylinder is connected with the lower joint, and also includes a flat key for connecting the center tube and the connecting cylinder, the adjustment ring and the outer wall of the setting seat There are two or more evenly distributed hook plate grooves on the upper part, at least two evenly distributed guide grooves are arranged on the inner wall of the connecting cylinder, and the same number of evenly distributed guide grooves are arranged on the outer wall of the lower end of the central tube. keyway.

The upper joint is provided with an external thread, four evenly distributed grooves are arranged on the external thread of the upper joint, two symmetrically arranged threaded holes are arranged on the outer circle of the adjustment ring, and adjustment screws are installed in the threaded holes.

The setting seat and the lower end of the central tube are in clearance fit, and an O-shaped sealing ring is arranged between the setting seat and the central tube.

A part of the upper end of the lower joint is in clearance fit with the inner wall of the lower end of the connecting cylinder through an O-shaped sealing ring, and the other part is threadedly connected with the inner wall of the lower end of the connecting cylinder.

A part of the upper end of the connecting cylinder is in clearance fit with the inner wall of the setting seat through an O-shaped sealing ring, and the other part is threadedly connected with the inner wall of the setting seat.

The inner hole at the upper end of the lower joint is a tapered hole.

The spacer ring is provided with a vent hole.

Compared with the prior art, the beneficial effects of the present invention:

In the slideway compression packer provided by the present invention, hook plate grooves are arranged on the adjustment ring and the outer wall of the setting seat, so that the packer can be assembled easily by using the hook plate. The processing of the outer wall of the hexagonal prism is more convenient and concise; the number of parts is small, and the production cost is low; through the flat key, the keyway on the center tube and the guide groove on the connecting cylinder, the setting and release can be conveniently carried out by lifting and pressing the upper joint. Sealing work, and ensure that the central pipe and the connecting cylinder do not rotate relative to each other, and ensure that the performance of the packer is stable and reliable.

Description of drawings

Fig. 1 is the structural representation of slideway compression packer;

Figure 2 is a schematic diagram of the structure for adjusting the tightness between the seal part of the packer and the spacer ring;

Fig. 3 Schematic diagram of the slideway structure for the movement of the central pipe during the setting and unpacking of the packer.

The marks in the figure are: 1. Upper joint; 2. Adjusting screw; 3. Adjusting ring; 4. Long rubber barrel; 5. Spacer ring; 6. Short rubber barrel; 7. Center tube; 8. Setting seat; 9 , flat key; 10, connecting cylinder; 11, lower joint; a, hook plate groove;.

Detailed ways

As shown in Figure 1-3, a slideway compression packer includes: an upper joint 1, a central pipe 7, a flat key 9, a connecting cylinder 10, and a lower joint 11, which are sequentially connected from top to bottom to form a packer Adjusting screw 2, adjusting ring 3, long rubber barrel 4, spacer ring 5, short rubber barrel 6, and setting seat 8 are connected up and down in order to form the sealing part of the packer, of which the short rubber barrel 6 is located in the two long rubber barrels. Between the rubber cylinders 4, the spacer ring 5 is located between the long rubber cylinder 4 and the short rubber cylinder 6.

The outer wall of the upper joint 1 is provided with an external thread, the inner wall is provided with an internal thread, and the inner wall of the adjusting ring 3 is provided with an internal thread that matches the external thread of the upper joint. 3. There are two symmetrically arranged threaded holes on the outer circle. There are four grooves on the outer thread of the upper joint 1. The threaded holes on the adjusting screw 2 penetrate through the adjustment ring 3 and the grooves on the outer circle of the upper joint 1 are in contact with each other. Tighten The adjustment screw 2 can fix the adjustment ring 3 and the upper joint 1 to achieve the purpose of positioning and prevent the adjustment ring 3 from loosening; unscrew the adjustment screw 2, and the position on the upper joint 1 can be changed by tightening or loosening the adjustment ring 3, and then Adjust the tightness between the long rubber barrel 4, the short rubber barrel 6 and the spacer ring 5; along the upper joint 1, loosen the adjustment ring 3 axially upward or downward to adjust the long rubber barrel 4, short The degree of tightness between the rubber barrel 6 and the spacer ring 5; there are 4 hook pull grooves a at the outer circumference of the adjustment ring 3, and the hook pull can be easily used to rotate the adjustment ring 3 during assembly. In this way, when assembling with the upper joint 1 , the tightness between the long rubber barrel 4, the short rubber barrel 6 and the spacer ring 5 in the sealing part of the packer can be adjusted; the spacer ring 5 between the long rubber barrel 4 and the short rubber barrel 6 When the packer is set, the air between the long rubber cylinder 4, the short rubber cylinder 6 and the central pipe 7 is discharged to ensure an excellent sealing effect.

A part of the upper end of the connecting cylinder 10 of the main part of the packer is in clearance fit with the setting seat 8 through an O-ring seal, and the other part is connected with the setting seat by threads to ensure the tightness of the connection; the outer wall of the setting seat 8 is designed with four uniform The hook pull groove a of the cloth can be easily assembled with the hook pull rotary setting seat 8 and the connecting cylinder 10 during assembly.

The setting seat 8 is connected with the lower end of the central pipe 7 in a clearance fit, and an O-shaped sealing ring is provided in the clearance to ensure the tightness of the connection.

The inner wall of the connecting cylinder 10 of the main part of the packer is provided with at least two evenly distributed guide grooves, and the outer wall of the lower end of the central pipe 7 is provided with the same number of evenly distributed key grooves, each guide groove and its corresponding key groove. A flat key 9 is placed in each. Under the action of the flat key 9, the central pipe 7 and the connecting cylinder 10 can make the central pipe 7 slide up and down along the guide groove in the connecting cylinder 10, and effectively prevent the relative rotation of the two, so it not only ensures that the lowering of the pipe string makes the isolation The effect of unsealing the packer by setting the packer and lifting the string by lifting the packer simultaneously solves the problem of easy rotation when the upper joint 1, the central pipe 7 and the connecting cylinder 10 are assembled.

The outer wall of the lower joint 11 is provided with an external screw, the inner wall of the lower end of the connecting cylinder 10 is provided with an internal thread, and a part of the upper end of the lower joint 11 is clearance-fitted with the inner wall of the connecting cylinder 10 through an O-ring to ensure the sealing performance, and the other part is connected with the connecting cylinder 10 The inner wall is threaded to ensure the firmness of the connection.

The upper part of the inner hole of the lower joint 11 of the main part of the packer is designed as a tapered hole, which reduces the area of the upper end face of the lower joint 11, thereby reducing the internal pressure acting on the end face of the lower joint 11 when the packer is working, avoiding the lower joint 11. 11 and the thread of connecting cylinder 10 are easy to release.

To sum up, the slideway compression packer has the advantages of simple structure, easy manufacturing and assembly, convenient operation and stable performance, which provides favorable guarantee for the normal production of the oil field and reduces the corresponding production cost.

The slideway compression packer has only 11 types of parts, and a total of 15 parts. Compared with the conventional packer, the number of parts is reduced by half. The structure is much simplified, and it is also much easier to process, manufacture and assemble. A lot of production costs are reduced; during oil production, the packer can be set by lowering the string to perform normal work, and the packer can be unsealed by lifting the string, which is easy to operate and has stable and reliable performance.

Setting process: Press down the upper joint 1, drive the adjusting ring 3 and the central tube 7 to slide down along the guide groove in the connecting cylinder 10, and the adjusting ring 3 drives the long rubber cylinder 4, the spacer ring 5 and the short rubber cylinder 6 to set in the direction The seat 8 slides, and since the setting seat 8 does not move, the long rubber cylinder 4 and the short rubber cylinder 6 become thicker laterally under the action of pressure to achieve setting.

Unsealing process: lift the upper joint 1, drive the adjusting ring 3 and the central tube 7 to slide up along the guide groove in the connecting cylinder 10, and the adjusting ring 3 is far away from the long rubber cylinder 4, the short rubber cylinder 6, the long rubber cylinder 4, the short rubber cylinder The cartridge 6 is restored to its original state under the action of its own restoring force to realize unsealing.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the present invention. scope of protection.

Claims (7)

1. A slideway compression packer, comprising an upper joint, a central pipe threadedly connected to the upper joint, an adjustment ring sleeved on the central pipe, a long rubber cylinder, a spacer ring, a short rubber cylinder and a setting seat, A connecting cylinder is connected between the inner wall of the setting seat and the outer wall of the lower end of the center tube, and the other end of the connecting cylinder is connected with the lower joint, and is characterized in that: it also includes a flat key for connecting the center tube and the connecting cylinder, and the adjusting ring There are two or more evenly distributed hook plate grooves on the outer wall of the base and the setting seat, the inner wall of the connecting cylinder is provided with at least two evenly distributed guide grooves, and the outer wall of the lower end of the central tube is provided with The same number of evenly distributed keyways. 2 . The slideway compression packer according to claim 1 , wherein the upper joint is provided with an external thread, the external thread of the upper joint is provided with four evenly distributed grooves, and the outer circle of the adjustment ring There are two symmetrically arranged threaded holes, and adjustment screws are installed in the threaded holes. 3 . The slideway compression packer according to claim 1 , wherein the setting seat and the lower end of the center pipe are in clearance fit, and an O-ring is provided between the setting seat and the center pipe. 4 . 4. The slideway compression packer according to claim 1, wherein a part of the upper end of the lower joint and the inner wall of the lower end of the connecting cylinder are gap-fitted by an O-ring seal, and the other part is threaded with the inner wall of the lower end of the connecting cylinder connect. 5 . The slideway compression packer according to claim 1 , wherein a part of the upper end of the connecting cylinder and the inner wall of the setting seat are gap-fitted by an O-ring seal, and the other part is connected to the inner wall of the setting seat. 6 . threaded connection. 6 . The slideway compression packer according to claim 1 , wherein the inner hole at the upper end of the lower joint is a tapered hole. 7 . 7 . The slideway compression packer according to claim 1 , wherein the spacer ring is provided with a vent hole. 8 .