CN212272110U - Crossing packer - Google Patents

Abstract

Penetrating through the packer, wherein conical surfaces corresponding to the inclined planes at the two ends of the slip are respectively arranged at the lower end of the upper cone body and the upper end of the lower cone body; the upper cone body is pressed downwards to further push the slips together with the lower cone body until the slips are occluded to the casing wall. The inclined planes at the two ends of the slip are matched with the conical surfaces of the upper cone body and the lower cone body, and the slip expands and contracts outwards after being pressed, so that a sealing layer can be effectively sealed and jointed, and the slip joint sealing layer is simple in structure, easy to operate and high in reliability.

Description

Crossing packer

Technical Field

The utility model relates to an oil gas field development instrument in the pit, specifically speaking is a packer that passes through of stable performance, simple structure.

Background

A packer is an elastic sealing element used to seal off the annular space between the tubular string and the borehole and between the tubular strings in various sizes and to isolate the producing zone for controlling production (injection) fluids and protecting the casing of the downhole tool. In order to improve the production efficiency and reduce the workload in an oil well with high liquid production, an oil-submersible electric centrifugal pump is often used for pumping oil. An over-the-cable packer is typically attached to the production string as part of the well control equipment to prevent blowout accidents. The cable-passing packer is axially provided with a plurality of channels which are not communicated with each other in a central tube and are respectively used as channels with the functions of crude oil production, cable crossing, gas discharge, medicament filling and the like.

During the production process of oil and gas fields, the related parameters of a production zone or a well bottom are often monitored in real time by using a cable. Generally, the cable crossing packer is mainly used for offshore oil fields and has higher cost. Therefore, a cable crossing packer is needed, which can ensure the sealing and tensile properties of the packer and reduce the cost under the condition of realizing the cable crossing function.

Disclosure of Invention

The utility model discloses a solve current problem, aim at providing one kind and pass through the packer.

In order to achieve the purpose, the utility model adopts the technical scheme that the cable-passing device comprises a central tube, wherein a cable-passing hole is arranged inside the central tube, and the outer wall of the central tube is provided with a rubber tube which can be extruded and deformed; the device also comprises a movable upper cone, a slip and a lower cone fixed on the outer wall of the central tube through an unsealing shear pin; the lower vertebral body falls after the decapsulation shear pin is sheared off. Conical surfaces corresponding to the inclined planes at the two ends of the slip are respectively arranged at the lower end of the upper cone body and the upper end of the lower cone body; the upper cone body is pressed downwards to further push the slips together with the lower cone body until the slips are occluded to the casing wall.

The slip is arranged in a space between the slip seat and the outer wall of the central pipe; the outer wall of the slip is connected with the inner wall of the slip seat through a compressed spring.

The conical surfaces of the upper cone and the lower cone are limited in the space between the slip seat and the outer wall of the central tube by the two ends of the slip seat through the bosses.

Wherein, the slip seat lateral wall is equipped with prevents changeing the pin.

The eccentric inner hole of the central tube divides the tube wall into a thin wall and a thick wall, and the cable through holes are formed in the thick wall.

Wherein, the both ends of center tube are connected with top connection, lower clutch through buttress screw respectively.

The outer wall of the central tube further comprises an upper piston and a lower piston, and the upper piston and the lower piston are communicated with the interior of the central tube through a pressure transfer hole in the side wall of the central tube; when the pressure is applied to the central tube, the upper piston and the lower piston move oppositely.

Wherein the lower end of the lower piston pushes the upper end of the upper vertebral body.

The piston assembly comprises a lower piston and a locking ring, wherein the outer wall of the lower piston is matched with the one-way guide teeth on the inner wall of the locking ring, and the lower piston can only move downwards.

Compared with the prior art, the utility model has the advantages that the inclined planes at the two ends of the slips are matched with the conical surfaces of the upper cone body and the lower cone body, and the slips expand and contract outwards after being pressed, so that the sealing layer can be effectively sealed and jointed; the structure of the buttress thread increases the tensile strength; the lock ring limits the lower piston to move downwards; the packer is suitable for multi-packer single-pipe selective well completion or double-pipe well completion, and has the advantages of simple structure, easiness in operation and strong reliability.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a cable through hole configuration;

FIG. 3 is a schematic view of the structure of the anti-rotation pin engaged with the slip;

referring to the attached drawings, 1-a central tube, 2-an upper rubber cylinder shoulder protector, 3-an end rubber cylinder, 4-a spacer ring, 5-a middle rubber cylinder, 6-an upper piston, 7-a valve separating ring, 8-a hydraulic cylinder, 9-a lower piston, 10-a locking ring, 11-a cylinder seat, 12-a setting shear pin, 13-an upper cone, 14-a slip, 15-a spring, 16-a slip seat, 17-a lower cone, 18-a deblocking shear pin, 19-a lower joint, 20-an upper joint, 21-a cable passing hole and 22-an anti-rotation pin.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings.

Referring to fig. 1 to 3, fig. 1 to 3 show an embodiment of the present invention, which is a through packer, in which the upper end of a central pipe is connected to an upper joint and the lower end thereof is connected to a lower joint; preferably, the central pipe is connected with the upper joint and the connecting part of the upper joint through buttress threads, so that the tensile strength of the packer can be increased. The central tube is also provided with a rubber cylinder which consists of two end rubber cylinders and a middle rubber cylinder; a spacing ring is arranged between the rubber cylinders, and the upper end of the rubber cylinder is also provided with a rubber cylinder shoulder protector.

Referring to fig. 2, the eccentric inner hole of the central tube divides the tube wall into a thin wall and a thick wall, wherein the thick wall is provided with two cable through holes and penetrates through the whole central tube; the outer walls of the upper piston and the lower piston are provided with hydraulic cylinders, and the lower piston is also detachably connected with a cylinder seat of the hydraulic cylinder through a setting shear pin. The upper piston and the lower piston are communicated with the inside of the central tube through a pressure transfer hole in the side wall of the central tube; when the pressure is applied to the central tube, the upper piston and the lower piston move oppositely.

The lower end of the upper cone body and the upper end of the lower cone body are respectively provided with a conical surface corresponding to the inclined surfaces at the two ends of the slip, and the upper end of the upper cone body is connected with the lower end of the lower piston through threads; when the upper centrum is pressed down, the force is resolved on the inclined plane and the conical surface together with the lower centrum, and then the slips is pushed to radially expand outwards until the slips are occluded to the casing wall.

The slips are arranged in a space between the slip seat and the outer wall of the central pipe; the outer wall of the slip is connected with the inner wall of the slip seat through a spring. The space further strengthens the structural stability through the bosses at the two ends of the slip seat, namely, the bosses and the grooves at the tail ends of the conical surfaces of the upper vertebral body and the lower vertebral body form a buckle structure, and then the conical surfaces of the upper vertebral body and the lower vertebral body are limited in the space between the slip seat and the outer wall of the central tube.

Furthermore, four bosses are designed at the bottom of the slip seat, and four bosses are correspondingly designed on the lower vertebral body; the two are mutually matched and can be installed into the slip seat by rotating the lower vertebral body.

Preferably, the spring is mounted between the slips and the slip bowl. Before the packer is set, the spring extrudes the slips to press the slips in the slip seat;

preferably, referring to fig. 3, the outer wall of the slip bowl has an anti-rotation groove, and an anti-rotation pin is installed in the anti-rotation groove to prevent the slip bowl from rotating.

Preferably, the locking ring is arranged between the outer wall of the lower piston and the hydraulic cylinder, and the inner wall of the locking ring is matched with the one-way guide teeth on the outer wall of the lower piston, so that the lower piston can only move downwards but cannot move back;

referring to fig. 1, in use, after crossing the packer to reach a predetermined level, a circulating well-flushing is performed. When the packer is penetrated and set, the packer is pressed into a pipe column, and an upper piston and a lower piston are respectively pushed through a pressure transmission hole and a split ring of the side wall. When the lower piston moves downwards, the setting shear pin is sheared off, the lower end of the lower piston pushes the upper cone to move downwards, the upper cone pushes the inclined plane to move through the conical surface, the spring is compressed, and the slips are pushed by the upper cone to open outwards. The upper piston simultaneously pushes the rubber cylinder upwards reversely and compresses the rubber cylinder. The lower piston continues to move downwards until the slips are meshed with the wall of the casing; the upper piston continues to compress the rubber cylinder upwards until the rubber cylinder is completely compressed. Meanwhile, the locking ring locks to prevent the piston and the like from returning, and setting is completed.

When the slip is unsealed, the central tube is lifted upwards, the unsealing shear pin is sheared at the moment, the lower cone and the slip seat move downwards and are blocked by the upper end of the lower joint, the upper cone and the lower cone release the support of the slip, and the spring in a compressed state releases the elastic force to enable the slip to rebound; and meanwhile, the locking ring is released, the cylinder base, the lower piston and the like move downwards under the action of resilience force of the rubber cylinder, and the rubber cylinder rebounds to finish deblocking.

The embodiments of the present invention have been described in conjunction with the accompanying drawings and examples, the structures of which are not intended to limit the present invention, and those skilled in the art can make modifications as required, and all changes and modifications within the scope of the appended claims are within the scope of protection.

Claims (10)

1. A crossing packer comprises a central pipe, wherein a cable crossing hole is formed in the central pipe, and a rubber sleeve capable of being extruded and deformed is arranged on the outer wall of the central pipe, and is characterized in that: the slip is characterized by also comprising an upper cone body, a slip and a lower cone body, wherein the lower end of the upper cone body and the upper end of the lower cone body are respectively provided with a conical surface corresponding to the inclined planes at the two ends of the slip; the upper cone body is pressed downwards to further push the slips together with the lower cone body until the slips are occluded to the casing wall.

2. A pass-through packer as claimed in claim 1, wherein: the slip is arranged in a space between the slip seat and the outer wall of the central pipe; the outer wall of the slip is connected with the inner wall of the slip seat through a spring.

3. A pass-through packer as claimed in claim 2, wherein: the conical surfaces of the upper vertebral body and the lower vertebral body are limited in the space between the slip seat and the outer wall of the central tube by the bosses at the two ends of the slip seat.

4. A pass-through packer as claimed in claim 2, wherein: the side wall of the slip seat is provided with an anti-rotation pin.

5. A pass-through packer as claimed in claim 1, wherein: the eccentric inner hole of the central tube divides the tube wall into a thin wall and a thick wall, wherein the cable through holes are formed in the thick wall.

6. A pass-through packer as claimed in claim 1, wherein: and two ends of the central pipe are respectively connected with the upper joint and the lower joint through buttress threads.

7. A pass-through packer as claimed in any one of claims 1 to 6, wherein: the outer wall of the central tube also comprises an upper piston and a lower piston, and the upper piston and the lower piston are communicated with the inside of the central tube through a pressure transfer hole in the side wall of the central tube; when the pressure is applied to the central tube, the upper piston and the lower piston move oppositely.

8. A pass-through packer as claimed in claim 7, wherein: the lower end of the lower piston pushes the upper end of the upper vertebral body.

9. A pass-through packer as claimed in claim 7, wherein: the lower piston is matched with the one-way guide teeth on the inner wall of the locking ring, and the lower piston can only move downwards.

10. A pass-through packer as claimed in claim 8, wherein: the lower piston is matched with the one-way guide teeth on the inner wall of the locking ring, and the lower piston can only move downwards.

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