CN2658377Y

CN2658377Y - Device for changing gas well casing packer

Info

Publication number: CN2658377Y
Application number: CN 200320102474
Authority: CN
Inventors: 沈宝明; 姬生柱; 储可利; 杨文革; 王小祥
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2003-10-31
Filing date: 2003-10-31
Publication date: 2004-11-24
Anticipated expiration: 2013-10-31

Abstract

The utility model relates to a replacing device for a bushing-type valve used in the gas well, mainly intends to resolve the problem that the replacement of a prior valve needs an operation of well killing and gas discharging and spraying, and is characterized in that holes of flanges (1 and 2) are internally provided with an overshot (4) having a salvaging rod (3). The upper side of the salvaging rod (3) is connected with a mandrel (5). The mandrel (5) is connected with a central tube (9) and an outer tube (10) through a pin (7). The central tube (9) is internally provided with a pressure-released sleeve (6) and a steel ball (17) that are contacted with the mandrel (5). A thread is arranged between the salvaging rod (3) and the flange (2). The central tube (9) is connected with a conical body (8) corresponding with an inner tapered hole of a rubber drum (16). The rubber drum (16) is covered with a slip support (15) at the underside. A slip with teeth (14) is connected with a base (13) of the slip. The base (13) is connected with the overshot (4) through a salvaging head (12). A spring (11) is clamped on a step between the central tube (9) and the outer tube (10). The utility model has the advantages that the replacement of a prior valve needs no operation of well killing and gas discharging and spraying.

Description

The gas well sleeve valve is changing device more

Technical field:

The utility model relates to more changing device, especially gas well sleeve valve changing device more of the used valve in oil recovery field, oil field.

Background technology:

In the oil field gas well produces oil and since the well head long term exposure in the open air, catch a cold dim alternately, factor affecting such as long service, the well head sleeve valve phenomenon that can leak air brings potential safety hazard for the production of gas well, this just need change the sleeve valve of damage.Adopt the mode of kill-job, open flow, operation to change and change sleeve valve at present, this mode promptly wastes energy, and pollutes the stratum again, and the equipment of employing is many, and expense is high again, and the activity duration is also long, and complicated operation, and labour intensity is big.

The utility model content:

Need the deficiency of the operation of kill-job open flow, pollution stratum, complicated operation when having the replacing valve now in order to overcome, the utility model provides more changing device of a kind of gas well sleeve valve, and this gas well sleeve valve more changing device has not kill-job, not open flow, not operation and characteristics simple to operate when changing valve.

The technical solution of the utility model is: this gas well sleeve valve is changing device more, comprise upper flange and lower flange, last lower flange links to each other by bolt, be covered with the pulling tube that is built-in with fishing rod up and down in the flange hole, the fishing rod upper end is connected with push rod, push rod links to each other with inside and outside central tube that is nested and outer tube by pin, central tube is built-in with pressure release cover and the steel ball that touches mutually with push rod, between fishing rod lower end and the flange hole screw thread is arranged, the central tube upper end is connected with and the corresponding cone of packing element cone-shaped inner hole, the outer packing element lower end of outer tube is with external surface to be taper and to support with slips that some slips inner surfaces match, the slips that appearance is worn tooth is connected on the slip spider boss, the slip spider lower end links to each other with fishing socket by fishing head, is covered with spring on the stage between central tube and the outer tube.

Above-mentioned slips is 3.

The beneficial effect that the utlity model has is: since the gas well sleeve valve more changing device when changing valve, after rendering to this device upper end in the big four earhole, the rotation fishing rod will be fixed and seal by slips and packing element, at this moment just the valve of required replacing can be removed, pass through rotation fishing rod deblocking again after replacing with new valve, this device is taken out, so just solved when changing valve, need the complicated procedures of forming problem of kill-job open flow operation, saved the energy, avoided pollution stratum and environment simultaneously, and the activity duration is short, simple to operate, labor strength is little, has realized the not operation of replacing valve, not kill-job, the purpose of open flow not.

Description of drawings:

Accompanying drawing 1 is the utility model structure sectional view.

1-upper flange among the figure, the 2-lower flange, the 3-fishing rod, 4-pulling tube, the 5-push rod, 6-pressure release cover, the 7-pin, the 8-cone, the 9-central tube, the 10-outer tube, the 11-spring, the 12-fishing head, the 13-slip spider, the 14-slips, the 15-slips supports, 16-packing element, 17-steel ball.

The specific embodiment:

Below in conjunction with accompanying drawing will the utility model is described in further detail:

By shown in Figure 1, this gas well sleeve valve more changing device comprises upper flange 1 and lower flange 2, and upper flange 1 and lower flange 2 link to each other by bolt, rise and support migration; Last lower flange (1,2) be covered with the pulling tube 4 of band stage in the upper end hole between in the hole placed in the middle, pulling tube 4 is built-in with fishing rod 3, is threaded between fishing rod 3 lower ends and lower flange 2 holes, fishing rod 3 upper ends are connected with push rod 5, make fishing rod 3 can drive push rod 5 inside and outside moving by screw thread rotation; Push rod 5 links to each other with inside and outside central tube 9 and the outer tube 10 of being nested by pin 7, and when moving by rotation fishing rod 3 is outer, pulling force reaches a timing, and pin 7 is cut off automatically; Central tube 9 is built-in with pressure release cover 6 and the steel ball 17 that touches mutually with push rod 5, drives pressure releases cover 6 by push rod 5 steel ball 17 is opened, and carries out the balance pressure release; Central tube 9 upper ends are connected with the cone 8 that the lower end is taper, cone 8 lower ends and outer tube 10 outer packing element 16 cone-shaped inner holes match, when pin 7 is cut off automatically, outer tube 10 moves up under the effect of spring 11, make packing element 16 ringfeders on the big four inwall, reach sealing purpose, but like this with regard to the replace with pressure valve, having solved gas well replacing valve needs the operation of kill-job open flow, pollutes stratum and problem of environment; Outer tube 10 outer packing elements 16 lower ends are with slips and support 15, it is taper that slips supports 15 external surfaces, slips support 15 and lower end endoporus are that the slips 14 of taper matches, slips 14 appearances are worn tooth, slips 14 is connected on the boss of slip spider 13, supports 15 male cone (strobilus masculinus) with slips 14 distendings by slips, so just guarantees to be with to depress to change valve, and labor strength is little, and is simple to operate; Slip spider 13 lower ends link to each other with fishing socket 4 by fishing head 12, after valve is changed, can will install all by fishing socket 4 and take out; Be covered with spring 11 on the stage between central tube 9 and the outer tube 10, when pin 7 is cut off, can will move on the outer tube 10 by spring 11, make cone 8 with packing element 16 ringfeders on the big four inwall, reach sealing purpose.

Claims

1, a kind of gas well sleeve valve is changing device more, comprise upper flange (1) and lower flange (2), flange (1,2) link to each other by bolt, it is characterized in that: flange (1,2) be covered with the pulling tube (4) that is built-in with fishing rod (3) in the hole, fishing rod (3) upper end is connected with push rod (5), push rod (5) by pin (7) with inside and outside the central tube (9) and the outer tube (10) that are nested link to each other, central tube (9) is built-in with pressure release cover (6) and the steel ball (17) that touches mutually with push rod (5), between fishing rod (3) lower end and flange (2) hole screw thread is arranged, central tube (9) upper end is connected with and the corresponding cone of packing element (16) cone-shaped inner hole (8), outer packing element (16) lower end of outer tube (10) is with external surface to be taper and to support (15) with slips that some slips (14) inner surface matches, the slips (14) that appearance is worn tooth is connected on slip spider (13) boss, slip spider (13) lower end links to each other with fishing socket (4) by fishing head (12), is covered with spring (11) on the stage between central tube (9) and the outer tube (10).

2, gas well sleeve valve according to claim 1 changing device more, it is characterized in that: slips (14) is 3.