CN201050339Y

CN201050339Y - Down-hole switch for pump recovery well snubbing environment-friendly operation

Info

Publication number: CN201050339Y
Application number: CNU2007201553252U
Authority: CN
Inventors: 张冬玲; 李宜强; 唐永强
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-16
Filing date: 2007-07-16
Publication date: 2008-04-23
Anticipated expiration: 2017-07-16

Abstract

An underground switch with environmentally friendly non-killing operation of mechanical recovery wells is primarily to resolve the problem that none of the equipments in the prior art can be effectively used to achieve the environmentally friendly non-killing operation process of mechanical recovery wells, which is characterized in that the underground switch also comprises a check valve composed of a valve housing (2), a valve ball (4) and a valve seat (5), a sliding bush (7), a tapping pin (9), a valve (14), a sawtooth-shaped circle chute (16) with long and short chute positions, a valve seat (17), a slider seat (18), a slider (19), a spring pushing seat (21) and a rectangular spring (22). The above components are all fixed on a cavity formed by an upper joint (1), a lower joint (23) and a shell (15). Such switch can be used for the effective prevention of the ejection of crude oil from wells in the tripping. Therefore, the purpose of the environmentally friendly non-killing operation of mechanical recovery wells is achieved. Moreover, the switch also has the characteristics of wear resistance and long service life.

Description

Not kill-job of machine-pumped oil well environmental protection operation down-hole switch

Technical field:

The utility model relates to a kind of aboveground down-hole control device of oil field machinery oil that is applied in, and specifically relates to a kind of down-hole switch of realizing not kill-job environmental protection operation.

Background technology:

The oil field machinery oil well need often carry out maintainability and remove the flow string operation in oil recovery process.When removing the flow string operation, because strata pressure is big, the crude oil in the well can spray from pit shaft, brings difficulty for workman's construction operation, greatly influences job execution progress, quality and safety, also can pollute environment simultaneously.Be directed to this, spray from pit shaft in order to prevent crude oil, once adopt mud to carry out kill job, still, mud lubrication not only can cause the mud contamination oil reservoir, influence crude oil production, if in case and the mud tubing flow displacement, then also can cause environment pollution.Another kind of solution adopts not kill-job environmental protection operation technique exactly.At present not kill-job of the machine-pumped oil well environmental protection operation technique that is adopted on the oil field mainly contains two kinds: a kind of technology is to adopt the down-hole switch of giving up.Be lowered to the tubing string of giving up exactly in the down-hole, this tubing string of giving up is made up of back-off packer and valve.When playing lower tubular column, valve is closed, and prevents the crude oil ejection.After lower tubular column was finished, the pike pole below tubing string was disclosed out valve, gets final product ordinary production.General electric pump well mostly adopts this technology.But no matter this valve is turnover panel valve or sliding sleeve valve, all exist easy to wear, the problem that the life-span is short.Another kind of technology is to adopt snubbing serving to live to block up.The work that is exactly a sealing of installation tubing string oil-in below oil well pump is stifled, on alive blocking up, a tapping pin is arranged, this tapping pin is propped the standing valve of pump, instantly during pump, crude oil can not spray from oil pipe, after following pump is finished, suppresses from oil pipe at well head, to live in blocking up and destroy in the tail pipe, get final product ordinary production.But the stifled effect that can only play snubbing serving when lower tubular column of this work also need be carried out the mud lubrication operation when lift pipe string.

The utility model content:

There is not a kind of device preferably can effectively realize the problem of not kill-job of machine-pumped oil well environmental protection operation technique in the prior art in order to solve, the utility model provides a kind of not kill-job of machine-pumped oil well environmental protection operation down-hole switch, when switch application is in not kill-job environmental protection operation technique under not kill-job of this kind machine-pumped oil well environmental protection well in operation, can prevent effectively that crude oil from rising, spraying during lower tubular column from well, realize the purpose of not kill-job of machine-pumped oil well environmental protection operation, and this switch also have characteristics wear-resistant, long service life.

The technical solution of the utility model is: not kill-job of this kind machine-pumped oil well environmental protection operation down-hole switch, comprise top connection, lower contact, shell body, a ball-and-seat that constitutes by valve cover, valve ball, valve seat, sliding sleeve, tapping pin, valve, one have the zigzag circumferential slideway of length slipway location, a valve base, a take-up housing, a slide block and a spring and push away bearing and rectangle spring.Above-mentioned parts all are fixed in the cavity that is made of top connection, lower contact and shell body.Wherein, the outer wall of top connection is connected with shell body, then is fixed with valve seat on its inwall, seals by sealing ring between the two.The valve cover is fixed in the top connection, is positioned at the upper end of valve seat, forms a chamber between the two, and valve ball is positioned at this chamber, and the lower end of this chamber has pressure transmission hole.Described sliding sleeve is positioned at below the pressure transmission hole, by the outer wall of top connection and the annular space that inwall constituted of shell body, sealing ring all is housed on the inside and outside wall of sliding sleeve, in addition, on the inwall of sliding sleeve upper end, one section inwall that has tapering is arranged.A valve seat pressure ring that is connected with the top connection lower end is arranged below the described valve seat, valve is connected on the inwall of valve seat pressure ring lower end, tapping pin is connected in the upper end of this valve, the lower end of valve is fixed in the upper end of described circumferential slideway, its lower end is connected with the inwall of lower contact, valve base is fixed on the outer wall of circumferential slideway and with the lower end of valve and is connected, the lower end of valve base then pushes away bearing with spring and is connected, pushing away at valve base and spring has an annular space between the bearing, the take-up housing that is fixed with slide block promptly is positioned at this annular space, and wherein slide block is positioned on the circumferential slideway.The lower end that spring pushes away bearing is fixed on the top of described rectangle spring, and its lower end is supported in the lower contact.

The utlity model has following beneficial effect: the novel snubbing serving switch of this kind is and sand prevention screen casing and the supporting use of back-off packer, prevented that effectively crude oil from spraying during by being engaged in of each parts, lower tubular column from well, can realize the purpose of not kill-job of machine-pumped oil well environmental protection operation.And this frame for movement that the utility model is taked has characteristics wear-resistant, long service life, is very suitable for applying on the oil field.

Description of drawings:

Fig. 1 is a structure sectional view of the present utility model.

Fig. 2 is the expansion schematic diagram of circumferential slideway in the utility model.

Fig. 3 is the utility model and sand prevention screen casing and the matching used process pipe string structure chart of back-off packer.

1-top connection among the figure, 2-valve cover, 3-oil well pump, 4-valve ball, the 5-valve seat, 6-pressure transmission hole, 7-sliding sleeve, 8-valve seat pressure ring, the 9-tapping pin, 10-back-off packer, not kill-job of 11-machine-pumped oil well environmental protection operation down-hole switch, 12-sand control screen, 13-sealing ring pressure ring, 14-valve, 15-shell body, 16-circumferential slideway, the long slipway location of 16a-, the short slipway location of 16b-, 17-valve base, 18-take-up housing, the 19-slide block, the 21-spring pushes away bearing, 22-rectangle spring, 23-lower contact.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, not kill-job of this kind machine-pumped oil well environmental protection operation down-hole switch, comprise top connection 1, lower contact 23 and shell body 15, in addition, comprise that also a ball-and-seat that is made of valve cover 2, valve ball 4, valve seat 5 and sliding sleeve 7, tapping pin 9, valve 14, zigzag circumferential slideway with length slipway location 16, valve base 17, take-up housing 18, a slide block 19 and a spring push away bearing 21 and rectangle spring 22, above-mentioned parts all are fixed in the cavity that is made of top connection 1, lower contact 23 and shell body 15.Have the length slipway location zigzag circumferential slideway 16 the planar development schematic diagram as shown in Figure 2.

Wherein, the outer wall of top connection 1 is connected with shell body 15, then is fixed with valve seat 5 on its inwall, seals by sealing ring between the two.Valve cover 2 is fixed in the top connection 1, is positioned at the upper end of valve seat 5, forms a chamber between the two, and valve ball 4 is positioned at this chamber, and the lower end of this chamber has pressure transmission hole 6.Described sliding sleeve 7 is positioned at below the pressure transmission hole 6, by the outer wall of top connection 1 and the annular space that inwall constituted of shell body 15, sealing ring all is housed on the inside and outside wall of sliding sleeve 7, in addition, on sliding sleeve 7 upper end inwalls, one section inwall that has tapering is arranged.The distance of this section inwall is shorter, when sliding sleeve 7 carries out under pressure in the descending process, when moving to inwall that this section have a certain taper by sealing ring, produces a tangible pressure and falls thereby sealing is destroyed.

A valve seat pressure ring 8 that is connected with the top connection lower end is arranged below the described valve seat 5, and valve 14 is connected on the inwall of valve seat pressure ring 8 lower ends, and tapping pin 9 is connected in the upper end of this valve 14, valve ball 4 can be propped when valve 14 is closed.The lower end of valve 14 is fixed in the upper end of described circumferential slideway 16, its lower end is connected with the inwall of lower contact 23, valve base 17 is fixed on the outer wall of circumferential slideway 16 and with the lower end of valve 14 and is connected, the lower end of valve base 17 then pushes away bearing 21 with spring and is connected, pushing away at valve base 17 and spring has an annular space between the bearing 21, the take-up housing 18 that is fixed with slide block 19 promptly is positioned at this annular space, wherein slide block 19 is positioned on the circumferential slideway 16, and slide block 19 can move up and down along the track on the circumferential slideway 16 and rotate.The lower end that spring pushes away bearing 21 is fixed on the top of described rectangle spring 22, and its lower end is supported in the lower contact 23.

This kind of novel snubbing serving switch is matching used with sand prevention screen casing and back-off packer, and its tubing string figure as shown in Figure 3.When giving up the tubing string operation instantly, this switch is in open mode, and slide block 19 is on the short slipway location of slideway 16, and the valve ball 4 on the ball-and-seat is closed.When pressure reached 18MPa, sliding sleeve 7 descending drive slide blocks 19 compressed the bottom that rectangle spring 22 goes downwards to slideway 16 together, and the demonstration that has pressure to descend.When behind the oil pipe release pressure, slide block 19 is being with valve 14 and sliding sleeve 7 up together under the effect of rectangle spring 22 that resets and bottom pressure, and valve 14 is in closed condition, slide block 19 is in the long slipway location 16a of slideway 16, and tapping pin 9 is with 4 jack-up of the valve ball on the ball-and-seat.

After giving up, descend pump to finish, suppress 15MPa at well head from oil sets annular space, under the effect of pressure, sliding sleeve 7 descending drive slide blocks 19 compress the bottom that rectangle spring 22 goes downwards to slideway 16 together, and the demonstration that has pressure to descend.When behind the oil pipe release pressure, slide block 19 is being with valve 14 and sliding sleeve 7 up together under the effect of rectangle spring 22 and bottom pressure, and valve 14 is in open mode, and slide block 19 is in the short slipway location 16b of slideway 16, gets final product ordinary production.

When oil well carries out well-flushing, generally come water about 4MPa, valve 14 can not closed.Can also prevent simultaneously that well-flushing water from immersing oil reservoir, plays the effect that well-flushing is not pressed oil reservoir.When the sand prevention screen casing takes place to stop up, can delivery valve cut out at well head, suppress from oil sets annular space, the sand prevention screen casing is carried out backwash.After flushing is finished, pressure is discharged, open delivery valve, rise and to take out when liquid level is reduced to 500 meters left and right sides, suppress from oil sets annular space again valve 14 is opened, get final product ordinary production.

When needs remove the pump operation, can suppress at the well head oil sets annular space, valve 14 is closed, can carry out not kill-job environmental protection operation.Suppress from the well head oil sets annular space again after operation is finished, valve 14 is opened, the production of can normally recovering the oil.

Claims

1. not kill-job of machine-pumped oil well environmental protection operation down-hole switch, comprise top connection (1), lower contact (23) and shell body (15), it is characterized in that: described down-hole switch also comprises one by valve cover (2), valve ball (4), a ball-and-seat and a sliding sleeve (7) that valve seat (5) constitutes, a tapping pin (9), a valve (14), zigzag circumferential slideway (16) with length slipway location, a valve base (17), a take-up housing (18), a slide block (19) and a spring push away bearing (21) and rectangle spring (22), and above-mentioned parts all are fixed in by top connection (1), in the cavity that lower contact (23) and shell body (15) constitute;

Wherein, the outer wall of top connection (1) is connected with shell body (15), then be fixed with valve seat (5) on its inwall, seal by sealing ring between the two, valve cover (2) is fixed in the top connection (1), is positioned at the upper end of valve seat (5), forms a chamber between the two, valve ball (4) is positioned at this chamber, and the lower end of this chamber has pressure transmission hole (6);

Described sliding sleeve (7) is positioned at below the pressure transmission hole (6), by the outer wall of top connection (1) and the annular space that inwall constituted of shell body (15), on the inside and outside wall of sliding sleeve (7) sealing ring is housed all, in addition, in sliding sleeve (7) upper end one section inwall that has tapering is arranged;

A valve seat pressure ring (8) that is connected with the top connection lower end is arranged below the described valve seat (5), valve (14) is connected on the inwall of valve seat pressure ring (8) lower end, tapping pin (9) is connected in the upper end of this valve (14), the lower end of valve (14) is fixed in the upper end of described circumferential slideway (16), its lower end is connected with the inwall of lower contact (23), valve base (17) is fixed on the outer wall of circumferential slideway (16) and with the lower end of valve (14) and is connected, the lower end of valve base (17) then pushes away bearing (21) with spring and is connected, pushing away at valve base (17) and spring has an annular space between the bearing (21), the take-up housing (18) that is fixed with slide block (19) promptly is positioned at this annular space, and wherein slide block (19) is positioned on the circumferential slideway (16);

The lower end that spring pushes away bearing (21) is fixed on the top of described rectangle spring (22), and its lower end is supported in the lower contact (23).