CN2519016Y

CN2519016Y - Snubbing service downhole switching device

Info

Publication number: CN2519016Y
Application number: CN 01265681
Authority: CN
Inventors: 毕雪松; 许辉; 倪明全
Original assignee: LONGGE PETROLEUM TECHNOLOGY Co Ltd DAQING
Current assignee: LONGGE PETROLEUM TECHNOLOGY Co Ltd DAQING
Priority date: 2001-09-28
Filing date: 2001-09-28
Publication date: 2002-10-30
Anticipated expiration: 2011-09-28

Abstract

The utility model relates to a snubbing service downhole switching device used in oil filed oil pumping well and snubbing well construction. The utility model increases the pump efficiency and avoids the problem of environment pollution. The utility model is characterized in that a lower center tube(3) is provided with a convex edge(13), and the convex edge is locked by a hydraulic cylinder sleeve(10); the upper part of the external wall of the cylinder sleeve(10) is sleeved with the external wall of an upper center tube(2) through a positioning sleeve(12) which is provided with a liquid hole; the cavity which is positioned at the lower end of the convex edge(13) is filled in serial with a valve(4), a supporting ring(5) and a balance piston(7), and then the cavity is sealed by a buckle head(11); wherein, the supporting ring(5) is passed through by a pin(6) and is fixed on the lower center tube(3). The utility model has the advantages of increasing the pump efficiency, good sealing performance and no environment pollution.

Description

The snubbing serving downhole on-off actuator

(1) technical field:

The utility model relates to not kill-job of oil well, a kind of derailing switch of using of open flow construction operation not, belongs to the snubbing serving downhole on-off actuator.

(2) background technology:

In the oilfield job execution at present, because the subsurface pressure height, the blowing ability is strong, needs to adopt mud to carry out kill-job in the construction, causes environment pollution easily, the waste fund.Though what existing derailing switch was taked is not kill-job of producing well, not open flow operation, has reduced the pollution of oil reservoir, construction cost reduces.But derailing switch commonly used is connected between oil well pump and the standing valve mostly, makes the original structure of pump that change take place, and influences the original sealing effectiveness of oil well pump, also influences the effect of derailing switch simultaneously, and pump efficiency is reduced; Moreover derailing switch can make the keying of anchor fluke lose efficacy easily owing to the fragility of anchor fluke by the anchor fluke keying that sucker rod moves up and down and makes derailing switch, can not reach keying repeatedly, influences the effect of pump.

(3) summary of the invention:

The purpose of this utility model provides and a kind ofly can overcome the not enough of above-mentioned technology and can improve pump efficiency and avoid the snubbing serving downhole on-off actuator of environment pollution.

Adoptable technical scheme is: this derailing switch is made up of last lower contact, last lower center tube, upper center tube is distinguished internal and external threads up and down and is connected top connection and lower center tube, it is characterized in that: lower center tube has fin to be blocked mutually by hydraulic cylinder, outer wall of cylinder jachet top and upper center tube outer wall are had the positioning sleeve in liquid hole to be nested, the cavity of fin lower end is filled by valve, support ring and dummy piston successively, with becoming the discount shutoff, wherein support ring is passed by pin and fixes on the lower center tube afterwards.

Therefore the beneficial effect of this derailing switch is: because this derailing switch is connected the following position of oil well pump, do not change pump structure, make pump keep original sealing effectiveness; Moreover cancelled anchor fluke, made the keying of derailing switch not be subjected to anchor fluke control and, opened and closed and be not easy to lose efficacy, improved pump efficiency, do not had the open-close on-off oil spout of moment, jet problem, non-environmental-pollution by hydraulic pressure time-delay control.

(4) description of drawings:

Accompanying drawing 1 is that structure of the present utility model is cutd open figure;

Accompanying drawing 2 is sectional views of the A-A of Fig. 1.

1-top connection, 2-upper center tube, 3-lower center tube, 4-valve, 5-support ring, 6-shop bolt, 7-dummy piston, 8-piston, 9-lower contact, 10-hydraulic cylinder, 11-change discount, 12-positioning sleeve, 13-fin.

(5) specific embodiment:

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

As Fig. 1 in conjunction with shown in Figure 2, this derailing switch is by last lower contact (1,9), go up lower center tube (2,3) form, upper center tube 2 is internal and external threads connection top connection 1 and lower center tube 3 respectively up and down, lower center tube 3 has fin 13 to be blocked mutually by hydraulic cylinder 10, cylinder sleeve 10 outer wall tops and upper center tube 2 outer walls are had the positioning sleeve 12 in liquid hole to be nested, the cavity of fin 13 lower ends is filled by valve 4, support ring 5 and dummy piston 7 successively, with becoming discount 11 shutoff, on dummy piston 7 walls, reinforce packing and make sealing effectiveness better afterwards; And lower center tube 3 connects piston 8, becomes discount 11 other ends and connects lower contact 9, and wherein support ring 5 is passed by pin 6 and fixes on the lower center tube 3.

During actual the use, top connection 1 is connect oil well pump.When normal oil recovery, the pressure that ground is come forces top connection 1 to drive upper center tube 2 and moves down together with lower center tube 3, and fin 13 promotes valve 4, support ring 5 moves down, and plays time-lag action, when arriving internal diameter and become big position, free-falling, the piston 8 that connect lower center tube 3 this moment moves down into the bottom, and fluid enters into the cavity in the lower contact 9 from the liquid hole of piston, enter into lower center tube 3 once more and enter in the oil pipe from the liquid hole of central tube 3, thereby open fuel tap, realize recovering the oil, not controlled by anchor fluke; When not needing to recover the oil, on put on joint 1 and can realize closing, very convenient.As seen, this derailing switch can be realized repeatedly opening and closing, and does not influence the work of former oil well pump, more can not influence the sealing of pump, has improved the utilization rate of pump; There are not the open-close on-off oil spout of moment, jet problem, non-environmental-pollution; Practicality simple to operate is suitable for promoting the use of in the oil field.

Claims

1, a kind of snubbing serving downhole on-off actuator that is used for the use of not kill-job of oil well construction operation, by last lower contact (1,9), last lower center tube (2,3) form, upper center tube (2) is internal and external threads connection top connection (1) and lower center tube (3) respectively up and down, it is characterized in that: lower center tube (3) has fin (13) to be blocked mutually by hydraulic cylinder (10), cylinder sleeve (10) outer wall top and upper center tube (2) outer wall are had the positioning sleeve (12) in liquid hole to be nested, the cavity of fin (13) lower end is successively by valve (4), support ring (5) and dummy piston (7) are filled, with becoming discount (11) shutoff, wherein support ring (5) is passed by pin (6) and fixes on the lower center tube (3) afterwards.