CN2092598U

CN2092598U - Heating-powered bridging plugs of dredge-up type

Info

Publication number: CN2092598U
Application number: CN 91208206
Authority: CN
Inventors: 杨康敏; 尹郑建
Original assignee: Oil Production Technology Research Institute of Sinopec Henan Petroleum Exploration Bureau
Current assignee: Oil Production Technology Research Institute of Sinopec Henan Petroleum Exploration Bureau
Priority date: 1991-05-22
Filing date: 1991-05-22
Publication date: 1992-01-08

Abstract

The utility model relates to a heating-powered bridging plug, particularly a dredge-up type heating-powered bridging plug, which is suitable for heating-powered mining and thick oil and mainly comprises an upper contact, an upper piston, an upper outer tube, a middle outer tube, a lower piston, a lock ball, a releasing grip, a salvaging body, a lower outer tube, a cone, a lower contact, etc. A lock ball connecting device and three finger form claw connecting mechanisms are arranged on the heating-powered bridging plug; through holes and holes in the salvaging body are arranged on the lock sleeve, and the finger form groove of a lower central tube forms interconnected pore canals. The operation is easy; the water power seats are sealed; the releasing grip is raised; the heating-powered bridging plug can be unsealed and can be repeatedly used; the distance between the top and containment pieces is shorter, and circular sand washing pore canals are provided; The utility model is favorable for sand washing and salvaging and can save a great quantity of expense.

Description

Heating-powered bridging plugs of dredge-up type

The utility model relates to a kind of heating power bridging plug, particularly a kind of salvagable heating power bridging plug, and it belongs to the down-hole sealing device with the heating exploitation viscous crude.

At present, the employed heating power bridging plug of heavy oil wells is the drillable heating power bridging plug of giving up.Carry in the employing and pressure foot envelope, on carry the right hand-rotation release, bore the mill deblocking.This bridging plug major defect is a deblocking voluntarily, can only lean on the use special tool, and the sealing anchor portion is milled, grinds or bores.Destructive deblocking like this, the construction technology complexity, bridging plug can not be reused, and causes very big waste.The grappling of this bridging plug and seat envelope by on carry oil pipe and oil pipe deadweight pressurization is finished, during pressuring oil pipe, because oil pipe is subjected to the axial compression load height in sleeve pipe, can bend contacts with casing wall, influences the sealing performance of bridging plug instantly.In addition, need rotation pipeline when giving up, helically twisted because of the oil pipe generation, make the load that is applied on the oil pipe can not pass to bridging plug fully, thereby influence the reliability that bridging plug is given up, also can increase task difficulty and unsafe factor.

Disclose a kind of retrievable bridge plug packer in CN89204613.9, it carries the deblocking that oil pipe is finished the bridging plug packer on adopting, and has overcome the bridging plug packer shortcoming of deblocking voluntarily.But, the needs of its incompatibility heating exploitation viscous crude, non-refractory does not have sand control, the sand washing system, the deblocking process is difficult for finishing.Because the heating exploitation viscous crude causes the stratum loose, heavy oil wells is shaked out seriously, when the full sand of orifice flow can not be gone out sand again in running into packer, lance can occur dragging for and can not enter the bridging plug endoporus, can not finish the deblocking action.When the bridging plug more than the hermetic unit and sleeve pipe rotating ring sky sink to sand, influence the flexibility of slips action, also have influence on the deblocking of bridging plug and trip out, make troubles to construction.

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of waterpower seat envelope is provided, on carry and giving up, but sand surfing salvage easily, on carry the salvagable heating power bridging plug of deblocking.

The utility model purpose can reach by following measure: it mainly by top connection 1, upper center tube 8, upper piston 4, upper exterior tube 7, middle external tube 10, lower piston 9, lock ball cover 11, lock ball 12, give up grab 15, parts such as a following big envelope 16, back shaft 17, salvaging body 20, support set 19, connection pawl 21, lock tube 22, lower outer pipe 31, lower center tube 30, cone 32, draw ring 35, slips 37, lower contact 39 constitute, and are provided with a lock ball bindiny mechanism and three finger-type pawl bindiny mechanisms at bridging plug.Specifically: middle external tube 10 is connected with salvaging body 20 by the pawl 15 of giving up, and has the hole on the middle external tube 10, and lock ball 12 is arranged in the hole and snaps in the annular groove of upper center tube 8, and lower outer pipe 31 is connected with salvaging body 20 by connecting pawl 21; Lower center tube 30 adopts the finger-type pawl to be connected with lower outer pipe 31.

The utility model purpose can also reach by following measure, and lower piston 9 is enclosed within on the middle external tube 10 and with a following big envelope 16 and links to each other, and there is an inwardly protruded shoulder following seat big envelope 16 lower ends.Lower outer pipe 31 is connected with draw ring 35, and there is inside boss cone 32 upper ends, between draw ring 35 and this gap is arranged.The finger-type groove 46 of lower center tube is relative with through hole 44 on the lower outer pipe 31, through hole 43 is arranged on the lock tube 22, these holes with salvage body 20 endoporus, lower center tube 30 finger-type grooves constitute the inside and outside duct that links to each other, and guarantee to drag for lance and dock with bridging plug is suitable in order to go out sand setting more than the packer accessory.

The utility model accompanying drawing drawing is described as follows:

Fig. 1 is the structure chart of salvagable heating power bridging plug;

Fig. 2 is the seat envelope state diagram of salvagable heating power bridging plug in sleeve pipe;

Fig. 3 is the state diagram of giving up of salvagable heating power bridging plug in sleeve pipe;

Fig. 4 is along the sectional drawing of A-A line among Fig. 3;

Fig. 5 is the deblocking state diagram of salvagable heating power bridging plug in sleeve pipe.

Now be described in detail the utility model in conjunction with the accompanying drawings and form structure.1 is top connection, and 2 is seal nipple, and it links to each other with cylinder sleeve 3.4 is upper piston, and 5 is seat of honour big envelope, and 6 is " O " type cushion rubber, and 7 is upper exterior tube, and it links to each other with seal nipple 2.8 is upper center tube, and it links to each other with back shaft 17 with top connection 1, and there is a ring annular groove at its middle part.9 is lower piston, and 10 is middle external tube, and its its middle part that links to each other with upper exterior tube 7 has some circular holes, and lock ball 12 is contained in the circular hole, and is stuck in the annular groove of upper center tube 8, and lock ball cover 11 is externally supporting lock ball.13 for being fixed on the position-limitting pin on the lock ball cover 11.15 are the pawl of giving up, and it links to each other with middle external tube 10, and its underpart is the finger-type pawl that has some grooves.14 is regulating sleeve, and it links to each other with the pawl 15 of giving up.16 are a following big envelope, and it links to each other with lower piston 9, and there is an inner convex platform its lower end.20 for salvaging body, and it links to each other with the pawl 15 of giving up, and the conical surface of bolster 17 is interior support.19 is support set, and 18 for being contained in the fixing pin on the support set 19.21 for connecting pawl, and its top is the finger-type pawl that has some grooves, and it links to each other with salvaging body 20 under the support of support set 19.22 is lock tube, and 23 is baffle ring, and it links to each other with lower outer pipe 31.24 is conical ring, it be connected pawl 21 and link to each other.25 is lock ring, and 26 is the lock ring seat, and it links to each other with lower outer pipe 31.27 is spacer ring, and 28 is spacing ring, and 29 is packer accessory, and 32 is cone, and 33 is graphite annulus, and 34 for stopping joint, and it links to each other with lower center tube 30.35 is draw ring, and it links to each other with lower outer pipe 31.36 for being contained in the position-limitting pin on the cone 32.37 is slips, and 38 is slip spider, and 39 are lower contact, and it links to each other with lower center tube 30.40 is set bolt, and it links to each other with slip spider.Lower center tube 30 upper ends are the finger-type pawl that has some grooves, and it links to each other with lower outer pipe 31 under the support of salvaging the body 20 lower end conical surfaces.

Accompanying drawing 2 is seat envelope of the present utility model state diagram, and wherein 41 is sleeve pipe.The seat envelope is to realize like this, ground highly pressurised liquid enters upper center tube 8 from top to bottom, by the gap between upper center tube 8 and the upper exterior tube 7 with the hole on the middle external tube 10 promotes upper piston 4 respectively and lower piston 9 is descending, thrust is respectively successively by seat of honour big envelope 5, a following big envelope 16, lock tube 22, spacer ring 27, spacing ring 28 extruding packer accessories 29 at present for these, and big sealing oil casing annular space makes it to rise.When pressure reaches one regularly, the position-limitting pin 36 on the cone 32 is cut off, and cone 32 moves down, and slips 37 separately is anchored on sleeve pipe 41 walls along cone 32 inclined-planes.Meanwhile, lower piston 9 promotes lock ball cover 11 and cuts off the fixing pin 13 that is contained on the lock ball cover 11, and lock ball cover 11 moves down, and lock ball 12 loses outer the support, gets ready for giving up.At this moment, the sawtooth box on lock tube 22 tops and lock ring 25 pin threads pin and make bridging plug keep seat envelope state.When hydraulic pressure reached design load, voltage stabilizing a period of time, the work of following step was carried out in termination of pumping then.

Accompanying drawing 3 is the state diagram of giving up of utility model.Give up action by on put on central tube 8 and finish.On put on central tube 8, lock ball 12 is extruded the annular groove of upper center tube 8, the pawl 15 of giving up loses interior support, upper center tube 8 drives middle external tube 10, the melon 15 of giving up is up, give up to receive to throw off in the finger-type pawl of pawl 15 and salvage body 20, when upper center tube 8 related middle external tubes 10, give up 15, lock ball cover 11, lower piston 9, when a following big envelope 16 is up in the lump, inner convex platform by a following big envelope 16 lower ends, drive support set 19, cut off the fixing pin 18 that is contained on the support set 19 and, throw off fully with upper center tube 8 one the same moving.Connect pawl 21 and lose outer the support, for deblocking is got ready.

Accompanying drawing 4 is Fig. 3 sectional drawings along the A-A line.42 for salvaging the circular hole on body 20 tops, and 45 is the annular space of bridging plug and sleeve pipe 41, and 43 is the slotted hole of lock tube 22 bottoms, and 44 is the slotted hole at lower outer pipe 31 middle parts, and 46 is the finger-type groove of lower center tube 30 upper ends.

Accompanying drawing 5 is deblocking state diagram of the present utility model.When needs deblocking bridging plug, to carry out sand washing earlier, be lowered to fisher 47, sand washing limit, limit is descending, salvages the silt particle of body 20 upper ends by the sand washing mouth rinse on the fisher 47, makes it part and enters the oil jacket annular space by the circular hole 42 of salvaging body 20 tops.After

fisher

47 and 20 pairs of bodies of salvaging connect, the sand setting of positive again well-flushing flushing packer accessory more than 29, liquid stream is by salvaging the endoporus of body 20, the finger-type groove 46 of lower center tube 30 upper ends, slotted hole on the lower outer pipe 31, slotted hole on the lock tube 22 enters annular space 45, and the silt particle of packer accessory more than 29 washed away.

Deblocking is finished by carrying salvaging body 20 on being.After carrying on the salvaging body 20, connect pawl 21 outer opening and throw off salvaging body 20, the conical surface of salvaging body 20 lower ends leaves lower center tube 30 upper end finger-type pawls, support in making it to lose and disengagement lower outer pipe 31, when salvaging body 20 related baffle rings 23, lower outer pipe 31, draw ring 35, cone 32 1 the same moving, receive in the slips 37 and removed grappling, carry on continuing again and salvage body 20, cone 32 contacts with stopping joint 34, and bridging plug just can trip out pit shaft.

The utlity model has following advantage:

1, upper center tube is connected with lower center tube with finger-type pawl bindiny mechanism by lock ball bindiny mechanism, the uncoupling flexibility and reliability, and put power aside and deblocking power is little.

2, the surplus top to shorter between the packer accessory, and be provided with circulating flushing sand hole road, be conducive to sand washing and salvaging.

3, compare with drillable heating power bridging plug, simple to operate, be easy to deblocking, can reuse, can save a large amount of expenses.

Claims

1, a kind of salvagable heating power bridging plug, mainly by top connection 1, upper center tube 8, upper piston 4, upper exterior tube 7, middle external tube 10, lower piston 9, lock ball cover 11, lock ball 12, give up grab 15, a following big envelope 16, back shaft 17, salvaging body 20, support set 19, connection pawl 21, lock tube 22, lower outer pipe 31, lower center tube 30, cone 32, draw ring 35, slips 37, lower contact 39 constitute, it is characterized in that:

A, middle external tube 10 are connected with salvaging body 20 by the pawl 15 of giving up;

Have the hole on b, the middle external tube 10, lock ball 12 is arranged in the hole and snaps in the annular groove of upper center tube 8;

C, lower outer pipe 31 are connected with salvaging body 20 by connecting pawl 21;

D, lower center tube 30 adopt the finger-type pawl to be connected with lower outer pipe 31.

2, salvagable heating power bridging plug according to claim 1 is characterized in that lower piston 9 is enclosed within on the middle external tube 10 and with a following big envelope 16 to link to each other, and there is an inwardly protruded shoulder following seat big envelope 16 lower ends.

3, salvagable heating power bridging plug according to claim 1 is characterized in that lower outer pipe 31 is connected with draw ring 35, and there is inside boss cone 32 upper ends, between draw ring 35 and this gap is arranged.

4, salvagable heating power bridging plug according to claim 1 is characterized in that the finger-type groove 46 of lower center tube is relative with through hole 44 on the lower outer pipe 31; Through hole 43 is arranged on the lock tube 22.