CN201407009Y

CN201407009Y - Hydraulic packer

Info

Publication number: CN201407009Y
Application number: CN2009200217412U
Authority: CN
Inventors: 高丽; 杨海风; 薛巨丰
Original assignee: 张玉雪
Priority date: 2009-05-01
Filing date: 2009-05-01
Publication date: 2010-02-17
Anticipated expiration: 2019-05-01

Abstract

The utility model relates to a hydraulic packer, which consists of an upper joint, an upper expansion ring, a central pipe, a plastic tube shaft, a plastic tube, a cone ring, a lower expansion ring, ahydraulic piston and a lower joint. The upper joint, the central pipe and the lower joint are coupled in sequence, the hydraulic piston is sleeved outside the central pipe and the upper joint, the upper expansion ring is arranged below the upper joint, the plastic tube is sleeved outside the plastic tube shaft, the upper end surface of the plastic tube props against the circular bead of the plastic tube shaft, the lower end surface of the plastic tube is arranged on the cone ring, the lower expansion ring is arranged below the cone ring and on the upper end surface of the hydraulic piston, and a coupling hole is arranged above the threads on the lower part of the central pipe. As the upper expansion ring and the lower expansion ring are both an open metal ring with an inner conical surface, the radial force can be generated under the effect of the axial force, thereby increasing the outer diameter, shortening the diameter difference the outer diameter thereof and the inner diameter ofthe sleeve, and protecting the plastic tube. The plastic tube can not be easily damaged due to the small shear force. The pressure bearing capacity is enhances, so the utility model can be applied inthe high-pressure operation.

Description

Hydraulic packer

One, technical field

The utility model belongs to the instrument that oil field packing Casing Failure is used, particularly a kind of hydraulic packer.

Two, background technology

Oil-water well needs hydraulic packer when separate stratum fracfturing, acidifying, water filling, existing hydraulic packer kind is more, but all there are some problems, mainly be that diameter difference between packer steel body diameter and the casing inner diameter is bigger, packing element is subjected to shearing force big, damages easily, can not be high pressure resistant, be not suitable for operations involving high pressure, as the high pressure pressure break.

Three, summary of the invention

The purpose of this utility model is exactly at the deficiencies in the prior art, designs a kind of hydraulic packer, makes it high pressure resistant, is suitable for the oil-water well operations involving high pressure.

The purpose of this utility model is achieved in that by top connection, central tube, hydraulic piston, lower contact is formed, top connection connects with central tube top, the central tube bottom connects with lower contact, hydraulic piston is sleeved on outside central tube and the top connection, top connection, last expansion loop is arranged between the hydraulic piston, the packing element axle, packing element, conical ring, following expansion loop, last expansion loop, following expansion loop is the opening metal ring, internal conical surface is all arranged, last expansion loop is under the top connection lower surface, the internal conical surface of last expansion loop is buckled on the outer conical surface of packing element axle upper end, packing element is sleeved on outside the packing element axle, the packing element upper surface withstands on the shoulder of packing element axle, packing element lower surface seat is on conical ring, expansion loop under under the conical ring being, in the interior ball pen conical surface of expansion loop, following expansion ring seat had linked hole on the central tube lower thread on the hydraulic piston upper surface under the outer conical surface of conical ring was in.

Supporting positive cover is installed in the lower contact, and supporting positive cover is under the hydraulic piston.

The beneficial effects of the utility model are: upward expansion loop, following expansion loop are the opening metal ring; internal conical surface is all arranged; under responsive to axial force, produce radial load; its external diameter can be increased, dwindled and casing inner diameter between diameter poor, can protect packing element; the shearing force that packing element bears is little; be not easy to damage, bearing capacity increases, and can be used for operations involving high pressure.

Four, description of drawings

Accompanying drawing is the assembling drawing of the utility model embodiment.

Five, the specific embodiment

Below in conjunction with accompanying drawing the utility model embodiment is described.

By top connection 1, last expansion loop 2, central tube 3, packing element axle 4, packing element 5, conical ring 6, following expansion loop 7, hydraulic piston 8, lower contact 9, supporting positive cover 10 is formed, top connection 1 connects with central tube 3 tops, central tube 3 bottoms connect with lower contact 9, hydraulic piston 8 is sleeved on outside central tube 3 and the top connection 1, top connection 1, last expansion loop 2 is arranged between the hydraulic piston 8, packing element axle 4, packing element 5, conical ring 6, following expansion loop 7, last expansion loop 2, following expansion loop 7 is the opening metal ring, internal conical surface is all arranged, last expansion loop 2 is under top connection 1 lower surface, the internal conical surface of last expansion loop 2 is buckled on the outer conical surface of packing element axle 4 upper ends, packing element 5 is sleeved on outside the packing element axle 4, packing element 5 upper surfaces withstand on the shoulder of packing element axle 4, packing element 5 lower surface seats are on conical ring 6, expansion loop 7 under under the conical ring 6 being, the outer conical surface of conical ring 6 is in down in the expansion loop 7 in the ball pen conical surfaces, and 7 of following expansion loops have linked hole 11 on central tube 3 lower thread on hydraulic piston 8 upper surfaces.Supporting positive cover 10 is installed in the lower contact 9, and supporting positive cover 10 is under the hydraulic piston 8.

Top connection 1 and central tube 3 can be designed to one.Hydraulic piston 8 can be fixed in lower contact 9 with pin, auspicious when suppressing pin is cut off, and goes into the well smoothly with convenient.

The utility model is down after the interior projected depth of well, in central tube 3, boost, pressure imports in the hydraulic piston 8 from linked hole 11, promote its up compression packing element 5, packing element 5 expansions seal up Casing Failure, in the time of the compression packing element, last expansion loop 2, expansion loop 7 external diameters increase down, protect packing element 5, packing element 5 can not damaged, so packing element 5 can be high pressure resistant.

Claims

1, a kind of hydraulic packer, by top connection (1), central tube (3), hydraulic piston (8), lower contact (9) is formed, top connection (1) connects with central tube (3) top, central tube (3) bottom connects with lower contact (9), hydraulic piston (8) is sleeved on outside central tube (3) and the top connection (1), it is characterized in that: top connection (1), last expansion loop (2) is arranged between the hydraulic piston (8), packing element axle (4), packing element (5), conical ring (6), following expansion loop (7), last expansion loop (2), following expansion loop (7) is the opening metal ring, internal conical surface is all arranged, last expansion loop (2) is under top connection (1) lower surface, the internal conical surface of last expansion loop (2) is buckled on the outer conical surface of packing element axle (4) upper end, packing element (5) is sleeved on outside the packing element axle (4), packing element (5) upper surface withstands on the shoulder of packing element axle (4), packing element (5) lower surface seat is on conical ring (6), expansion loop (7) under under the conical ring (6) being, the outer conical surface of conical ring (6) is in the following interior ball pen conical surface of expansion loop (7), following expansion loop (7) seat has linked hole (11) on central tube (3) lower thread on hydraulic piston (8) upper surface.

2, hydraulic packer according to claim 1 is characterized in that: lower contact (9) is gone up supporting positive cover (10) is installed, and supporting positive cover (10) is under the hydraulic piston (8).