CN102900395A

CN102900395A - Hydraulic packer

Info

Publication number: CN102900395A
Application number: CN201110215699XA
Authority: CN
Inventors: 魏军; 金学宏; 徐俊
Original assignee: YANGZHOU CHICHENG PETROLEUM MACHINERY CO Ltd
Current assignee: YANGZHOU CHICHENG PETROLEUM MACHINERY CO Ltd
Priority date: 2011-07-29
Filing date: 2011-07-29
Publication date: 2013-01-30

Abstract

A hydraulic packer relates to a packer used in an oil field. The hydraulic packer comprises a central tube, an upper joint, a lower joint, a well flushing valve plug, a well flushing valve sleeve, a setting piston, a locking seat, a piston bush, a permanent seat, a setting shear pin, a locking ring seat, a deblocking shear pin, a locking ring, a locking ring seat, a push-pull tube, a rubber barrel mandrel and a rubber barrel gland; and at least two rubber barrels are sheathed outside the rubber barrel mandrel between the rubber barrel gland and the push-pull tube through spacing rings. Compared with the traditional Y341 packer, the hydraulic packer has the characteristics of simple structure, reasonable design, setting reliability, well flushing reliability, great pressure-bearing capacity and the like.

Description

A kind of hydraulic packer

Technical field

The present invention relates to the oil field packer, especially Y341 type hydraulic packer.

Background technology

The design of XXY341 type packer is unreasonable, and complex structure.In going down process because the setting mechanism external and internal pressure is uneven, when head of liquid greater than setting when cutting off intensity, cut off and will cut off in advance, head of liquid promotes to set piston stroking upward compression packing element and sets, and causes packer can't descend projected depth; During well-flushing, flushing valve can not be opened fully, causes well-flushing pressure large.

Summary of the invention

The object of the invention be to design a kind of simple in structure, set the hydraulic packer reliable, that well-flushing is reliable, bearing capacity is large.

The present invention includes central tube, in the upper/lower terminal of described central tube be threaded respectively top connection and lower contact, it is characterized in that:

Central tube sidewall in the top connection lower end arranges upper-side hole, the arranged outside shoulder of described top connection, outside the central tube of top connection lower end, be nested with the flushing valve plug, on being nested with, described flushing valve is positioned the well-flushing valve pocket on the described top connection shoulder beyond the Great Wall, the uniform side direction through hole of described well-flushing valve pocket lower sides is nested with the upper end beyond the Great Wall at described flushing valve and is threadedly connected to well-flushing valve pocket on the shoulder of top connection; Between described top connection and the well-flushing valve pocket, between well-flushing valve plug and the well-flushing valve pocket, between central tube and the well-flushing valve plug sealing ring is set respectively.

Central tube sidewall in the lower contact upper end arranges lower-side hole, the arranged outside shoulder of lower contact, outside the central tube of lower contact upper end, be nested with setting piston, outside the central tube of described setting piston upper end, be nested with locking bed, the circumferential boss of described locking bed arranged outside annular, uniform side opening on described circumferential boss arranges piston bush between the shoulder of described circumferential boss lower end and lower contact, described piston bush lower end is threaded with lower contact; Between described lower contact and the piston bush, between setting piston and the central tube, between setting piston and the piston bush, between locking bed and the piston bush sealing ring is set respectively.

Has externally threaded boss in the central tube arranged outside corresponding with the circumferential boss of described locking bed; Between locking bed top and central tube holder is set, the outside of described holder is fixedly connected in the circumferential boss of locking bed by the setting shear pin of radial arrangement, and the holder internal thread is connected on the described boss in the central tube outside; The lock ring seat is set between described central tube and locking bed, and the upper end of described lock ring seat is connected to the lower end of holder by the deblocking shear pin of radial arrangement; Between lock ring seat and locking bed lock ring is set, described lock ring is enclosed within outside the lock ring seat, and the lower end of lock ring arranges the attaching nut, and the attaching nut is threaded on the lock ring seat; Inwall in the locking bed bottom arranges the profile of tooth anchor ring, and described lock ring periphery arranges the pawl adaptive with the profile of tooth anchor ring of described locking bed.

The push-and-pull pipe is threaded in described locking bed upper end, in the centre bore of described push-and-pull pipe upper end, articulate the packing element mandrel, the packing element gland is threaded in described packing element mandrel upper end, described packing element mandrel is nested with outside central tube, packing element mandrel lower end is threaded in outside the central tube, between packing element gland and packing element mandrel sealing ring is set.

Be nested with at least two packing elements by spacer ring outside the packing element mandrel between packing element gland and push-and-pull pipe.

Operating principle of the present invention:

Lower brill: in going down process, flushing valve is opened, and packing element below liquid flow to the packing element top from the gap of by-pass prot between central tube and packing element mandrel, reduce lower brill resistance; The setting mechanism internal and external pressure balance sets piston and keeps original position motionless.

Set: packer is after projected depth, and filling liquid in the oil pipe is under the inside and outside differential pressure effect, flushing valve is closed, and when pressure reaches 5～6MPa, sets shear pin and cuts off, set the piston compression packing element that moves up, make packing element Expansion sealing oil casing annular space; Simultaneously, the locking of lock ring and locking bed can not be thrown off, packer deblocking voluntarily not after the pressure release.

Anti-flushing well: to the oil casing annular space filling liquid, when hydraulic pressure reached 0.5～1MPa, flushing valve was opened, and continued filling liquid, can realize anti-flushing well.

Deblocking: upper lifting pipe post 3～4t cuts off the deblocking shear pin, continues the upper lifting pipe post, removing seal for packer.

The present invention and existing Y341 packer relatively, have simple in structure, reasonable in design, set reliable, the characteristics such as well-flushing is reliable, and bearing capacity is large.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention.

The specific embodiment

As shown in Figure 1, the present invention is in the upper/lower terminal of central tube 14 be threaded respectively top connection 1 and lower contact 24.

Central tube 14 sidewalls in top connection 1 lower end arrange upper-side hole 14-1, the arranged outside shoulder 2 of top connection 1.Outside the central tube 14 of top connection 1 lower end, be nested with flushing valve plug 6, be set up the well-flushing valve pocket 3 of holding on the shoulder 2 that is threadedly connected to top connection 1, the uniform some side direction through hole 3-1 of well-flushing valve pocket 3 lower sides at well-flushing valve plug 6 overcoats.Between top connection 1 and the well-flushing valve pocket 3, between well-flushing valve plug 6 and the well-flushing valve pocket 3, between central tube 14 and the well-flushing valve plug 6 O-ring seals 4,5 is set respectively.

Central tube 14 sidewalls in lower contact 24 upper ends arrange lower-side hole 14-3, the arranged outside shoulder 24-1 of lower contact 24, outside the central tube 14 of lower contact 24 upper ends, be nested with setting piston 23, outside the central tube 14 of setting piston 23 upper ends, be nested with locking bed 21, the circumferential boss 21-1 of locking bed 21 arranged outside annulars, uniform side opening 21-2 on circumferential boss 21-1.Between the shoulder 24-1 of circumferentially boss 21-1 lower end and lower contact 24 piston bush 22 is set, the lower end of piston bush 22 is threaded in the lower contact 24.Between lower contact 24 and the piston bush 22, between setting piston 23 and the central tube 14, between setting piston 23 and the piston bush 22, between locking bed 21 and the piston bush 22 O-ring seals is set respectively.

Has externally threaded boss 14-2 in central tube 14 arranged outside corresponding with the circumferential boss 21-1 of locking bed 21.Between locking bed 21 tops and central tube 14, holder 15 is set, the outside of holder 15 is fixedly connected in the circumferential boss 21-1 of locking bed 21 by the setting shear pin 16 of radial arrangement, and holder 15 internal threads are connected on the boss 14-2 in central tube 14 outsides.

Between central tube 14 and locking bed 21 lock ring seat 19 is set, the upper end of lock ring seat 19 is connected to the lower end of holder 15 by the deblocking shear pin 17 of radial arrangement.Between lock ring seat 19 and locking bed 21 lock ring 18 is set, lock ring 18 is enclosed within outside the lock ring seat 19, and the lower end of lock ring 18 arranges attaching nut 20, and attaching nut 20 is threaded on the lock ring seat 19.

Inwall in locking bed 21 bottoms arranges some profile of tooth anchor ring 21-3, some pawl 18-1 that the profile of tooth anchor ring 21-3 of the periphery setting of lock ring 18 and locking bed 21 is adaptive.

Push-and-pull pipe 13 is threaded in locking bed 21 upper ends, in push-and-pull pipe 13 upper end centre bores, articulate packing element mandrel 12, packing element gland 8 is threaded in packing element mandrel 12 upper ends, packing element mandrel 12 is nested with outside central tube 14, packing element mandrel 12 lower ends are threaded on the external screw thread 14-4 of central tube, between packing element gland 8 and packing element mandrel 12 O-ring seals 7 are set.

Be nested with three packing elements 9 by two spacer rings 10,11 compartments outside the packing element mandrel 12 between packing element gland 8 and push-and-pull pipe 13.

Claims

1. hydraulic packer, comprise central tube, in the upper/lower terminal of described central tube be threaded respectively top connection and lower contact, it is characterized in that: the central tube sidewall in the top connection lower end arranges upper-side hole, the arranged outside shoulder of described top connection, outside the central tube of top connection lower end, be nested with the flushing valve plug, on being nested with, described flushing valve is positioned the well-flushing valve pocket on the described top connection shoulder beyond the Great Wall, the uniform side direction through hole of described well-flushing valve pocket lower sides is nested with the upper end beyond the Great Wall at described flushing valve and is threadedly connected to well-flushing valve pocket on the shoulder of top connection; Between described top connection and the well-flushing valve pocket, between well-flushing valve plug and the well-flushing valve pocket, between central tube and the well-flushing valve plug sealing ring is set respectively; Central tube sidewall in the lower contact upper end arranges lower-side hole, the arranged outside shoulder of lower contact, outside the central tube of lower contact upper end, be nested with setting piston, outside the central tube of described setting piston upper end, be nested with locking bed, the circumferential boss of described locking bed arranged outside annular, uniform side opening on described circumferential boss arranges piston bush between the shoulder of described circumferential boss lower end and lower contact, described piston bush lower end is threaded with lower contact; Between described lower contact and the piston bush, between setting piston and the central tube, between setting piston and the piston bush, between locking bed and the piston bush sealing ring is set respectively; Has externally threaded boss in the central tube arranged outside corresponding with the circumferential boss of described locking bed; Between locking bed top and central tube holder is set, the outside of described holder is fixedly connected in the circumferential boss of locking bed by the setting shear pin of radial arrangement, and the holder internal thread is connected on the described boss in the central tube outside; The lock ring seat is set between described central tube and locking bed, and the upper end of described lock ring seat is connected to the lower end of holder by the deblocking shear pin of radial arrangement; Between lock ring seat and locking bed lock ring is set, described lock ring is enclosed within outside the lock ring seat, and the lower end of lock ring arranges the attaching nut, and the attaching nut is threaded on the lock ring seat; Inwall in the locking bed bottom arranges the profile of tooth anchor ring, and described lock ring periphery arranges the pawl adaptive with the profile of tooth anchor ring of described locking bed; The push-and-pull pipe is threaded in described locking bed upper end, in the centre bore of described push-and-pull pipe upper end, articulate the packing element mandrel, the packing element gland is threaded in described packing element mandrel upper end, described packing element mandrel is nested with outside central tube, packing element mandrel lower end is threaded in outside the central tube, between packing element gland and packing element mandrel sealing ring is set; Be nested with at least two packing elements by spacer ring outside the packing element mandrel between packing element gland and push-and-pull pipe.