CN202531090U - Well-flushing packer for oil jacket separate injection of casing water injection well - Google Patents

Abstract

The utility model relates to a well-flushing packer for oil jacket separate injection of a casing water injection well. An upper joint is sleeved on a port of an inner central pipe; an upper backwashing casing is positioned outside the inner central pipe; six backwashing well inlet channels are formed on the upper backwashing casing; an upper backwashing piston is positioned in an annulus formed by a backing ring, a sealing ring, the inner central pipe and the upper backwashing casing, and the upper part of the upper backwashing piston is provided with a spring; an outer central pipe is sleeved on the inner central pipe, and an annulus channel is formed between the inner and outer central pipes; an upper compression rubber barrel and a retainer ring are sleeved outside the outer central pipe; a lower rubber barrel seat is sleeved on the inner central pipe; a lower backwashing piston is arranged below a lower pressing cap and at a joint of a sealing sleeve and the lower rubber barrel seat; a locking spring is arranged below the lower backwashing piston and in the annulus formed by the sealing casing and the inner central pipe, and the upper end of a steel casing is fixed at the lower end of the sealing casing; the lower end of the steel casing is connected with a rear locking casing; the rear locking casing is connected with a shear pin seat; and a locking mechanism, a supporting ring and a pin are arranged on a lower joint at the joint of the steel casing and the shear pin seat. By the equipment, the problem that the conventional well-flushing packer has low backwashing pressure is solved.

Description

The washing well packer that is used for sleeve pipe water injection well water injection through tubing and casing

Technical field

The utility model relates to a kind of washing well packer that is used for sleeve pipe water injection well water injection through tubing and casing.

Background technology

To the characteristics of the big gradient middle-deep well of ultra-low penetration oil reservoir, conventional little cover zonal injection technology have that test allotment precision is low, the packer setting period of validity short and the injecting process in problems such as backwash valve is prone to open.The utility model is for solving the defective of above-mentioned prior art, designs a kind ofly to be used for 4 ¹/ ₂The Y341-95 washing well packer of little cover well water injection through tubing and casing, the backwash valve opening pressure reaches more than the 6.0MPa, and the backwash pressure height can decide through the selection of spring simultaneously.This instrument is packer deblocking not in washing well process, and backwash valve is difficult for opening in the injecting process, has guaranteed the reliability of water filling work.

The utility model content

The purpose of the utility model provides a kind of washing well packer that is used for sleeve pipe water injection well water injection through tubing and casing, realizes anti-flushing well in the injecting process.This instrument is guaranteeing to have improved backwash valve design work pressure under the safe and reliable prerequisite of packer, and backwash valve is difficult for opening in the injecting process, and back backwash pathway closure under the effect of spring force is accomplished in the anti-flushing well operation, assurance zonal injection technology smooth implementation.

The washing well packer that the utility model is described to be used for sleeve pipe water injection well water injection through tubing and casing by top connection, go up backwash cover, inner central tube, spring, go up the backwash piston, upper pressing cap, gluing ring support, up compression packing element, spacer ring, outer core pipe, lower rubber cylinder seat, protection ring, lower pressing cap, down the backwash piston, down backwash kink, snap, steel bushing, retaining mechanism, support ring, pin, lock tube, set shear pin, shear pin seat, lower contact and sealing ring and constitute;

Top connection is positioned at the core pipe upper end, on the core pipe port, is sitting on the gasket ring in being enclosed within; Last backwash cover is positioned at outside the core pipe of top connection below; The junction is sealed by last sealing ring; Backwash puts and is provided with 6 anti-flushing well import ducts on last sealing ring top; Last backwash piston is arranged in gasket ring, sealing ring, core pipe, goes up the annular space that the backwash cover forms, and top is provided with spring, and the bottom is fixed by the upper pressing cap on the core pipe in being enclosed within; On the core pipe, pressure cap and last backwash cover lower end were sealed by lower seal in the gluing ring support was enclosed within; On the core pipe, form annulus access between two pipes in outer core pipe is enclosed within, the upper end is stuck in the groove of gluing ring support and the formation of upper end sealing ring, and the lower end is stuck in lower rubber cylinder seat upper end, is sealed by the lower end sealing ring; Up compression packing element and spacer ring overlap outside outside the core pipe; The lower rubber cylinder cover for seat is on interior core pipe, and the lower end is fixed by protection ring and lower pressing cap, by the sealing of ring sealing ring; Following backwash piston is arranged under the lower pressing cap, and the junction of sealing shroud and lower rubber cylinder seat is sealed by the lower pressing cap sealing ring; Snap is arranged on down backwash piston below, and in the annular space that sealing shroud and interior core pipe form, the steel bushing upper end is fixed on the lower end of sealing shroud, on the interior core pipe, is sealed by the steel bushing sealing ring; The steel bushing lower end is enclosed within outside the lower contact and is connected with the back lock tube, and back lock tube is enclosed within outside the lower contact, and the shear pin seat outer with being enclosed within lower contact is connected with the back lock tube through setting shear pin, and the lower contact of steel bushing and shear pin seat junction is provided with retaining mechanism, support ring and pin.

During well-flushing; Flushing fluid is got into by the anti-flushing well import duct that last backwash puts, and backwash piston stroking upward in the promotion gets into the annulus access between inside and outside central tube; Promote backwash descent of piston down; Get rid of from the fluid hole that following backwash puts, realize the anti-flushing well operation under the packer setting state, adopt spring control backwash piston opening pressure at 6.0MPa.

The utility model relates to a kind of washing well packer that is used for sleeve pipe water injection well water injection through tubing and casing, between the big layer position of two suction difference, has set the washing well packer, can effectively solve the low defective of conventional washing well packer backwash pressure.

Description of drawings

Fig. 1 is used for the washing well packer construction sketch map of sleeve pipe water injection well water injection through tubing and casing.

Wherein: 1 top connection; Sealing ring on 2; Backwash cover on 3; 4 gasket rings; Core pipe in 5; 6 spring A; 7 sealing rings; Backwash piston on 8; 9 pressure caps; 10 lower seal; 11 gluing ring supports; 12 upper end sealing rings; 13 up compression packing elements; 14 spacer rings; 15 outer core pipes; 16 lower end sealing rings; 17 lower rubber cylinder seats; 18 protection rings; 19 ring sealing rings; 20 pressure caps; 21 times backwash pistons; 22 lower pressing cap sealing rings; 23 sealing shrouds; 24 times backwash kinks; 25 snaps; 26 steel bushing sealing rings; 27 steel bushings; 28 retaining mechanisms; 29 support rings; 30 pins; 31 back lock tubes; 32 set shear pin; 33 shear pin seats; 34 lower contacts.

The specific embodiment

The described washing well packer that is used for sleeve pipe water injection well water injection through tubing and casing of the utility model is by top connection 1; Last backwash cover 3; Inner central tube 5; Spring 6; Last backwash piston 8; Upper pressing cap 9; Gluing ring support 11; Up compression packing element 13; Spacer ring 14; Outer core pipe 15; Lower rubber cylinder seat 17; Protection ring 18; Lower pressing cap 20; Following backwash piston 21; Following backwash kink 24; Snap 25; Steel bushing 27; Retaining mechanism 28; Support ring 29; Pin 30; Lock tube 31; Set shear pin 32; Shear pin seat 33; Lower contact 34 and sealing ring constitute;

Top connection 1 is positioned at core pipe 5 upper ends, on core pipe 5 ports, is sitting on the gasket ring 4 in being enclosed within; Last backwash cover 3 is positioned at outside the top connection 1 below core pipe 5; The junction is by last sealing ring 2 sealings; Be provided with 6 anti-flushing well import ducts on the backwash cover 3 on last sealing ring 2 tops; Last backwash piston 8 is arranged in gasket ring 4, sealing ring 7, core pipe 5, goes up the annular space that backwash cover 3 forms, and top is provided with spring 6, and the bottom is fixing by the upper pressing cap on the core pipe 5 in being enclosed within 9; On the core pipe 5, pressure cap 9 overlapped 3 lower ends with last backwash in gluing ring support 11 was enclosed within, by lower seal 10 sealings; On the core pipe 5, form annulus access between two pipes in outer core pipe 15 is enclosed within, the upper end is stuck in the groove of gluing ring support 11 and 12 formation of upper end sealing ring, and the lower end is stuck in lower rubber cylinder seat 17 upper ends, by 16 sealings of lower end sealing ring; Up compression packing element 13 and spacer ring 14 overlap outside outside the core pipe 15; On the core pipe 5, the lower end was fixing with lower pressing cap 20 by protection ring 18 in lower rubber cylinder seat 17 was enclosed within, by 19 sealings of ring sealing ring; Following backwash piston 21 is arranged on lower pressing cap 20 times, and the junction of sealing shroud 23 and lower rubber cylinder seat 17 is by 22 sealings of lower pressing cap sealing ring; Snap 25 is arranged on down backwash piston 21 belows, and in the annular space of sealing shroud 23 and interior core pipe 5 formation, steel bushing 27 upper ends are fixed on the lower end of sealing shroud 23, on the interior core pipe 5, by 26 sealings of steel bushing sealing ring; Steel bushing 27 lower ends are enclosed within outside the lower contact 34 and are connected with back lock tube 31; Back lock tube 31 is enclosed within outside the lower contact 34; Be connected with back lock tube 31 through setting shear pin 32 with the shear pin seats 33 outside being enclosed within lower contact 34, the lower contact 34 of steel bushing 27 and shear pin seat 33 junctions is provided with retaining mechanism 28, support ring 29 and pins 30.

Claims (1)

1. A washing well packer that is used for sleeve pipe water injection well water injection through tubing and casing by top connection, go up backwash cover, inner central tube, spring, go up the backwash piston, upper pressing cap, gluing ring support, up compression packing element, spacer ring, outer core pipe, lower rubber cylinder seat, protection ring, lower pressing cap, down the backwash piston, down backwash kink, snap, steel bushing, retaining mechanism, support ring, pin, lock tube, set shear pin, shear pin seat, lower contact and sealing ring and constitute; It is characterized in that:

   Top connection is positioned at the core pipe upper end, on the core pipe port, is sitting on the gasket ring in being enclosed within; Last backwash cover is positioned at outside the core pipe of top connection below; The junction is sealed by last sealing ring; Backwash puts and is provided with 6 anti-flushing well import ducts on last sealing ring top; Last backwash piston is arranged in gasket ring, sealing ring, core pipe, goes up the annular space that the backwash cover forms, and top is provided with spring, and the bottom is fixed by the upper pressing cap on the core pipe in being enclosed within; On the core pipe, pressure cap and last backwash cover lower end were sealed by lower seal in the gluing ring support was enclosed within; On the core pipe, form annulus access between two pipes in outer core pipe is enclosed within, the upper end is stuck in the groove of gluing ring support and the formation of upper end sealing ring, and the lower end is stuck in lower rubber cylinder seat upper end, is sealed by the lower end sealing ring; Up compression packing element and spacer ring overlap outside outside the core pipe; The lower rubber cylinder cover for seat is on interior core pipe, and the lower end is fixed by protection ring and lower pressing cap, by the sealing of ring sealing ring; Following backwash piston is arranged under the lower pressing cap, and the junction of sealing shroud and lower rubber cylinder seat is sealed by the lower pressing cap sealing ring; Snap is arranged on down backwash piston below, and in the annular space that sealing shroud and interior core pipe form, the steel bushing upper end is fixed on the lower end of sealing shroud, on the interior core pipe, is sealed by the steel bushing sealing ring; The steel bushing lower end is enclosed within outside the lower contact and is connected with the back lock tube, and back lock tube is enclosed within outside the lower contact, and the shear pin seat outer with being enclosed within lower contact is connected with the back lock tube through setting shear pin, and the lower contact of steel bushing and shear pin seat junction is provided with retaining mechanism, support ring and pin.

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