CN2463565Y - Lever pump switch valve with no need of well killing - Google Patents

Abstract

The utility model relates to a switch valve used for pump inspection work and normal oil pumping of a pumping well rod type pump with no need of well killing, which is composed of a coupling, a tubing pup joint, a spring pawl, a sealed body, a bush, a sealing member, a press cap, etc. The utility model is characterized in that both ends of the tubing pup joint are provided with screw threads, and the upper part is connected with the coupling; the upper end of an inner hole is provided with a slot, and the slot corresponds to an upper end convex part of the spring pawl; the lower end is connected with the sealed body, and the other end of the sealed body is placed in the bush; the lower part of the bush is connected with the sealing member, and the lower part of the sealing member is connected with the press cap; the bush is arranged on the sealed body, and the utility model has the advantage of simple structure.

Description

A kind of sucker rod pump valve with no need of well killing

The utility model relates to a kind of switch valve that does not need kill-job when being used for pumping well sucker rod pump pump detection and workover and normal oil pumping.

At present, sucker rod pump valve with no need of well killing both domestic and external has the float-ball type switch valve, and its principle is to close oil flow channel by high bottom pressure or floating function in ball float, and the switch valve of this structure exists push rod to push up not open the phenomenon of valve when bottom pressure is high; Another kind is the valve type switch valve, and its principle is to close oil flow channel by the effect of spring force with valve, but also has same problem when overpressure.

It is a kind of easy to use that the purpose of this utility model is to provide, simple in structure and open and during throttle down and irrelevant not kill-job of the rod-type pumping unit switch valve of bottom pressure.

The utility model is realized in the following manner: not kill-job of rod-type pumping unit switch valve, form by box cupling 1, tubing nipple 3, spring detent 4, seal 5, lining 6, Sealing 7 and pressure cap 8 etc., there is screw thread at the two ends that it is characterized in that tubing nipple 3, its top links to each other with box cupling 1, there is groove the upper end, hole, corresponding with the upper end lug boss of spring detent 4, the lower end is connected with seal 5, the other end of seal 5 is put into lining 6, lining 6 bottoms are connected with Sealing 7, Sealing 7 bottoms are connected with pressure cap 8, and lining 6 is on seal 5.

Advantage of the present utility model is that this structure is to rely on the put-on and delegated sucker rod that power is passed to push rod 2, to close and to open the passage that connects on the tubing nipple 3 between oil pipe and the sleeve pipe, thereby realize the switch gear of snubbing serving and normal oil pumping, therefore not only simple in structure, and convenient the use, bottom pressure all can be opened and throttle down under any state, and is safe in utilization, improved service behaviour.

Below in conjunction with accompanying drawing and enforcement the utility model is described in further detail.

Fig. 1 is a structural drawing of the present utility model;

Fig. 2 is the A-A sectional view of parts 4 among Fig. 1;

Fig. 3 is the partial enlarged drawing of parts 7 among Fig. 1.

As shown in Figure 1, box cupling 1 is the standard tubing coupling, and an end is connected with oil pipe, and the other end is connected with tubing nipple 3; Push rod 2 upper ends are connected with the sucker rod pump lower end, the other end has step, its effect is to rely on to transfer sucker rod, pass to push rod 2, open the passage that connects on the tubing nipple 3 between oil pipe and the sleeve pipe, push rod 2 is up, because the diameter of spring detent 4 upper ends diminishes, step on the constraint push rod 2, drive seal and close the passage that connects on the pipe nipple 3 between oil pipe and the sleeve pipe, when up one section spring detent 4 upper end entered in the groove of tubing nipple 3, the step constraint on the push rod 2 was removed, and can realize not kill-job pump detection and workover this moment; Tubing nipple 3 two ends have screw thread to be connected with the bottom oil pipe with box cupling 1 respectively, on tubing nipple 3 endoporus groove is arranged, guarantee that spring detent 4 upper ends enter in the groove of tubing nipple 3, step on the push rod 2 can pass through, lower end, tubing nipple 3 hole is porose, guaranteeing has passage between oil pipe and the sleeve pipe, one end of spring detent 4 has inside and outside step and has groove, guarantee that when it is in the groove of tubing nipple 3 be free state, when the endoporus of tubing nipple 3 shrinks, the step on the constraint push rod 2, the other end of spring detent 4 is that screw thread is connected with seal 5, there is screw thread at seal 5 two ends, and an end is connected with spring detent 4, and the other end is put into lining 6, Sealing 7 backs are connected with pressure cap 8, lining 6 is placed on the seal 5, separate two Sealings 7 and play a supporting role, Sealing 7 is enclosed within on the seal 5, and external diameter contacts with endoporus at tubing nipple 3 and seals, have groove in the Sealing 7, can change diameter when guaranteeing pressurized, to increase sealing effect, pressure cap 8 mainly works to compress Sealing 7 with seal 5.

Claims (3)

1, a kind of sucker rod pump valve with no need of well killing, by box cupling (1), tubing nipple (3), spring detent (4), seal (5), lining (6), Sealing (7) and pressure cap compositions such as (8), there is screw thread at the two ends that it is characterized in that tubing nipple (3), its top links to each other with box cupling (1), there is groove the upper end, hole, corresponding with the upper end lug boss of spring detent (4), the lower end is connected with seal (5), the other end of seal (5) is put into lining (6), lining (6) bottom is connected with Sealing (7), Sealing (7) bottom is connected with pressure cap (8), and lining (6) is on seal (5).

2, sucker rod pump valve with no need of well killing according to claim 1 is characterized in that there is through hole the lower end, hole of tubing nipple (3), and an end of spring detent (4) has inside and outside step and has groove.

3, sucker rod pump valve with no need of well killing according to claim 1 is characterized in that in the Sealing (7) groove being arranged.

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