CN202745796U - In-cone type packer for oil well - Google Patents

Abstract

The utility model discloses an in-cone type packer for an oil well. The in-cone type packer comprises an upper joint, an upper centering device, a central pipe, an upper rubber sleeve, a pressing ring, an upper locking spring, a lower locking spring, a piston, a positioning sleeve, a clamping block, a cylinder, a lower rubber sleeve, a lower centering device, a lock cap and a shear pin, and the in-cone type packer is characterized in that the lower end of the upper joint is connected with the long-tube shaped central pipe; a short-pipe shaped cone with a conical lower part, the upper rubber sleeve, the pressing ring, the piston, the cylinder, the lower rubber sleeve, the lower centering device and the lock cap are sequentially arranged on the outer wall of the central pipe from top to bottom; the upper centering device is arranged on the outer pipe wall of the cone; an upper shear cap with a protection ring is arranged by the shear pin; the protecting ring is also arranged on the pressing ring at the lower end of the upper rubber sleeve; the positioning sleeve which is arranged on the central pipe by the shear pin is connected below the piston; the upper locking spring and the lower locking spring are respectively arranged among the piston, the cylinder and the central pipe; the pressing ring is connected with the cylinder by the shear pin; the clamping block is arranged at the lower part inside the cylinder; the protecting ring is also arranged at the lower end of the clamping block; the outer pipe wall, corresponding to the lower end of the lower rubber sleeve, at the lower part of the central pipe is in a circular cone shape; and a lower shear cap with the protecting ring is arranged by the shear pin. The in-cone type packer for the oil well is reasonable in structural design, simple and convenient to operate and reliable to work.

Description

Oil well is bored into the formula packer

Technical field: the utility model relates to a kind of oil field downhole tool, bores into the formula packer especially for a kind of oil well of horizontal well stratified operation.

Background technology: before the utility model, each oilfield horizontal well bore hole stratified operation is adopted compression packer more, its cartridge just relies on upper and lower compressive force realization expansion plugging, thereby shutoff face is the line contact, also owing to set rear packing element and its inner tube has certain interval, radially vibration can occur, and has therefore affected the plugging effect of the irregular borehole wall.

Summary of the invention: the purpose of this utility model is: bore into the formula packer for horizontal well bore hole stratified operation provides a kind of oil well, because this device is bored into packing element by cylinder and is made its realization shutoff of expanding, thereby shutoff face is the face contact, set rear packing element and its endosiphuncular tube gapless, radially vibration can not occur, therefore guaranteed the plugging effect of the irregular borehole wall.

The purpose of this utility model realizes by following measures: a kind of oil well is bored into the formula packer, comprise top connection, upper centralizer, central tube, upper packing element, pressure ring, upper snap, lower snap, piston, positioning sleeve, fixture block, cylinder barrel, lower rubber cylinder, lower centralizer, and lock nut, shear pin, it is characterized in that the top connection lower end connects the central tube of elongate tubular, the central tube outer tube wall is equipped with the cone of the tapered short tube shape in bottom from top to bottom successively, and upper packing element, pressure ring, piston, cylinder barrel, lower rubber cylinder, lower centralizer and lock nut thereof; Centralizer is installed on the cone outer tube wall and by the upper shearing cap of shear pin installation with protection ring, on the pressure ring of upper packing element lower end protection ring is installed also; Connect one below the piston and be installed in positioning sleeve on the central tube by shear pin, be separately installed with snap, lower snap between piston and cylinder barrel, the central tube; Pressure ring is connected by shear pin with cylinder barrel, and the bottom is equipped with fixture block in the cylinder barrel, its lower end also is equipped with protection ring; The outer tube wall of corresponding lower rubber cylinder lower end, central tube bottom is coniform, and by the down cut cap of shear pin installation with protection ring.

The utility model reasonable in design, easy and simple to handle, reliable operation, be used for horizontal well bore hole stratified operation, can bore into packing element by cylinder and make it expand realize contacting with the face of the borehole wall, and radially vibration can not occur, so guarantee the plugging effect of the irregular borehole wall.

Description of drawings: Fig. 1 is that oil well is bored the structural representation into the formula packer.

The specific embodiment: it is by top connection 1, upper centralizer 2, cone 3, central tube 4, upper shearing cap 5, upper packing element 7, pressure ring 9, upper snap 10, lower snap 11, piston 12, positioning sleeve 13, fixture block 14, cylinder barrel 15, lower rubber cylinder 17, down cut cap 19, lower centralizer 20, lock nut 21 that oil well is bored into the formula packer, and protection ring 6,8,16,18 and shear pin 22,23,24,25 etc. consist of; Top connection 1 lower end connects the central tube 4 of elongate tubular, and central tube 4 outer tube walls are equipped with the cone 3 of the tapered short tube shape in bottom from top to bottom successively, and upper packing element 7, pressure ring 9, piston 12, cylinder barrel 15, lower rubber cylinder 17, lower centralizer 20 and lock nut 21 thereof; The upper shearing cap 5 of centralizer 2 is installed on cone 3 outer tube walls, also installing with protection ring 6 by shear pin 25 also is equipped with protection ring 8 on the pressure ring 9 of upper packing element 7 lower ends; Connect one below the piston 12 and be installed in positioning sleeve 13 on the central tube 4 by shear pin 23, be separately installed with snap 10, lower snap 11 between piston 12 and cylinder barrel 15, the central tube 4; Pressure ring 9 is connected by shear pin 24 with cylinder barrel 15, and cylinder barrel 15 interior bottoms are equipped with fixture block 14, its lower end also is equipped with protection ring 16; The outer tube wall of corresponding lower rubber cylinder 17 lower ends, central tube 4 bottoms is coniform, and by the down cut cap 19 of shear pin 22 installations with protection ring 18.

Operating principle and using method that oil well is bored the formula packer are: be connected in this device on the tubing string by top connection 1 and central tube 4 lower end screw threads first and lower going-into-well under the precalculated position, just can shear pin 23 be cut off to pressurization in the tubing string, piston 12 is up and promote pressure ring 9, upper packing element 7 is up, shear pin 25 is cut off, and cone 3 cones enter in the upper packing element 7 to make its expansion; Simultaneously, it is descending that positioning sleeve 13 promotes cylinder barrels 15, and make lower rubber cylinder 17 slip into central tube 4 bottoms to be on the cone shape outer tube wall and to expand; Snap 10, lower snap 11 lock respectively cylinder barrel 15, piston 12 on this moment, and then finish and set operation.Rely on the cylinders such as cone 3 and central tube 4 to bore into realizing owing to the expansion of upper packing element 7 and lower rubber cylinder 17, therefore can guarantee to contact with the face of the borehole wall, and radially vibration can not occur.

Claims (1)

1. an oil well is bored into the formula packer, comprise top connection, upper centralizer, central tube, upper packing element, pressure ring, upper snap, lower snap, piston, positioning sleeve, fixture block, cylinder barrel, lower rubber cylinder, lower centralizer, and lock nut, shear pin, it is characterized in that: the top connection lower end connects the central tube of elongate tubular, the central tube outer tube wall is equipped with the cone of the tapered short tube shape in bottom from top to bottom successively, and upper packing element, pressure ring, piston, cylinder barrel, lower rubber cylinder, lower centralizer and lock nut thereof; Centralizer is installed on the cone outer tube wall and by the upper shearing cap of shear pin installation with protection ring, on the pressure ring of upper packing element lower end protection ring is installed also; Connect one below the piston and be installed in positioning sleeve on the central tube by shear pin, be separately installed with snap, lower snap between piston and cylinder barrel, the central tube; Pressure ring is connected by shear pin with cylinder barrel, and the bottom is equipped with fixture block in the cylinder barrel, its lower end also is equipped with protection ring; The outer tube wall of corresponding lower rubber cylinder lower end, central tube bottom is coniform, and by the down cut cap of shear pin installation with protection ring.

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