CN2515421Y - Theft-proof air valve in well head - Google Patents

Abstract

The utility model discloses a wellhead theft-proof gas valve, which comprises a valve body, and a barrel, wherein a thread in the valve body is connected with the barrel, and one end of the barrel is provided with a hollow concentric reducer, and the other end of the barrel is provided with a sieve pore pipe, a grinding ball is arranged in the sieve pore pipe, and a gland is disposed on the upper end surface of the sieve pore pipe, a blind plate is installed on the other end of the barrel, and eyelets are evenly scattered on the blind plate. The utility model has the advantages that the structure is simple, the cost is low, the employment is safe, the effect of guarding against theft is prominent, and the work of oil well productions, oil well tests and the other work and the like can not be affected, which is a perfect wellhead assorted device.

Description

The antitheft air valve of well head

The utility model relates to a kind of antitheft air valve of well head of oil-gas field development, belongs to the corollary apparatus of producing well well head.

The wellhead for production in present oil field, comprise that mainly tubing valve, sleeve valve, pressure meter, wax removal valve etc. recover the oil and the survey showing device, but often there is the lawless person to open sleeve valve, from pressure tapping theft sleeve pipe gas, owing to steal gas, not only lost national wealth, influence the ordinary production in field output and oil field, and very dangerous, cause that easily fire or high pressure gas wound the people.

The purpose of this utility model is to provide a kind of well head antitheft air valve, and it can effectively prevent surreptitiously gas behavior.

The purpose of this utility model is achieved in that the antitheft air valve of well head is made up of valve body, fuse, the valve body internal thread is connected with fuse, one end of fuse is hollow concentric reducer, the other end is an antipriming pipe, be provided with valve ball in the antipriming pipe, upper surface at antipriming pipe is screwed with gland, and the other end of fuse is equipped with blind plate, is evenly equipped with aperture on the blind plate.

The utility model need not change existing wellhead assembly, as long as the antitheft air valve of installing just can use behind sleeve valve, has simple in structure, cost is low, safe in utilization, anti-theft effect is remarkable, do not influence oil well production, survey and to show and advantage such as other operation, be a kind of comparatively ideal well head corollary apparatus.

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

Fig. 1 is the structural representation of antitheft air valve;

Among the figure: 1-gland, 2-fuse, 3-valve ball, 4-blind plate, 5-valve body;

As shown in Figure 1, the antitheft air valve of well head is made up of gland 1, fuse 2, valve ball 3, blind plate 4 and valve body 5, dress is by fuse 2 in valve body 5, fuse 2 is a hollow concentric reducer, is provided with valve ball 3 in hollow section, can block the passage of gas, one end of fuse 2 is an antipriming pipe, gas can enter in the fuse 2 by its hole, is screwed with gland 1 on its end face, valve ball 3 can be controlled in the fuse 2.The other end of fuse 2 is equipped with blind plate 4, is evenly equipped with aperture on the blind plate 4, can pass through fluid, but blocks the endoporus of fuse, makes it not disclose out valve ball 3 with club.

During installation, gland one end of antitheft valve has buckle, and it connects with sleeve gate outlet oil pipe, and antipriming pipe inserts in the outlet, and the other end connects with manometric oil pipe.In the time of need carrying out operations such as well-flushing or dosing, unload pressure meter and carry out operation, because the fluid pressure when well-flushing or dosing is bigger than the pressure in the pit shaft, back down valve ball 3, fluid enters in the pit shaft by the internal channel and the sieve aperture of fuse 2, finish well-flushing or dosing operation, when the needs pressure measurement, open sleeve gate, because gas pressure height in the pit shaft, gas can penetrate in the pressure meter of valve rear end slowly by the inner hole wall of valve ball 3 with fuse 2, carries out pressure measurement, because pressure measurement is undertaken by the gas slowly seepage, so the pressure measurement time increases, and for remedying this shortcoming, can often open by maintainance set hook gauge gate, make manometric constant pressure, so just can write down casing pressure at any time.Though the casing pressure table has pressure to show, its tolerance just leaks out by valve ball, and tolerance is very little.In addition,, want to smash out valve ball, can only smash on blind plate, can not smash on the valve ball with club owing to be provided with blind plate, thereby the antitheft air valve of not opening.

Claims (1)

1, the antitheft air valve of a kind of well head is made up of valve body (5), fuse (2), it is characterized in that: valve body (5) internal thread is connected with fuse (2), one end of fuse (2) is hollow concentric reducer, the other end is an antipriming pipe, be provided with valve ball (3) in the antipriming pipe, be screwed with gland (1) in the upper surface of antipriming pipe, the other end of fuse (2) is equipped with blind plate (4), and blind plate is evenly equipped with aperture on (4).

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