SU1452931A1 - Arrangement for eliminating gas, oil and water manifestations at well-head - Google Patents

Abstract

The invention relates to the mining industry and allows to increase the reliability and safety of operation of the device by providing unloading of the drive shaft (B) from the action of well pressure. In the case (K) of 1 cylindrical form a stop is screwed on top

Description

one

The invention relates to the mining industry, namely to devices for the prevention and elimination of gas and oil outlets at the wellhead.

The purpose of the invention is to increase the reliability and safety of the operation of the device by ensuring the unloading of the drive shaft from the action of well pressure.

FIG. 1 shows the device, a general view; in fig. 2 is a section A-A in FIG. one; on fig.Z - section bb in fig. one .

The device consists of a cylindrical body 1, the thrust sleeve 2 is screwed into the top. The drive shaft 3 has an outer stepped protrusion 4, the back box 5, the pressure sleeve 6 and the thrust bearing 7 are placed inside the case 1. On the stop sleeve 2, the bolts are fixed for 8 s longitudinal window. I

The drive shaft 3 with an outer stepped protrusion 4 has, in the upper and lower parts, external threads of the same pitch, which interact respectively with the nut-indicator 9 and the pushing sleeve 6.

The protrusion of the indicator nut 9 located inside the hood 18 8 can be moved in the axial direction inside the longitudinal window of the cover 8.

In the drive shaft 3, radial 10 and axial 11 channels are also interconnected.

The axial channel 11 has a stepped shape, is plugged at the top and open at the bottom, and a movable separation piston 12 is installed in it. The axial channel 11 via a radial channel 10 is hydraulically connected to the annular cavity 13 between the upper end of the outer stepped protrusion 4 of the drive shaft 3 and the anvil bushing 2. The annular cavity 13 and the channels 10 and 11 are filled with a liquid, such as mineral oil. The area of the upper end of the outer stepped protrusion 4 must be equal to or greater than the area of the lower end of the shaft 1.

in the case of equality of areas, the drive shaft 3 is unloaded from the action of well pressure, in the other case, the drive in; 1л 3 a force is directed downwards and is perceived by the thrust bearing 7, placed 3114

The clamping sleeve 6 has a key 14 interconnected with the longitudinal groove made in the housing 1. As a result, the pressing sleeve 6 moves only in axial direction relative to the housing 1.

The case 1 is also attached to the case 1 for connecting pipes, pipes and valves. A handle 16 is attached to the upper end of the drive shaft 3. The sealing of individual parts is carried out using rubber sealing rings 17. The device case 1 is connected to the reverse a valve consisting of a sub 18, a valve plate 19, a stem 20 with a stop nut 21, a spring 22 and a lash 23 with holes 24,

The device works as follows.

To open the check valve, the drive shaft 3 is rotated using the handle 16, and the nut-pointer 9 starts to move downward from its initial (extremely upper) position. At the same time, the pressing sleeve 6 also moves downwards, interacting with the stop nut 21, compressing the spring 22 and opening-c; check valve. To rotate the drive shaft, a sufficiently small force is used regardless of the magnitude of the well pressure inside the device, since the drive shaft 3 is unloaded by transferring the well pressure through the movable separation piston 12 of the fluid filling the axial 11 and radial 10 channels, as well as the annular cavity 13. Through this fluid pressure is transmitted to the upper end of the outer stepped protrusion 4 of the drive shaft 3, balancing the force acting on the lower end of the drive shaft 3. When the valve is fully opened back, the protrusion is a nut and the pointer 9 is in the lowest position in the window of the lid 8.

The check valve is closed by rotating the drive shaft.

in the opposite direction. In this case, the nut-pointer 9 and the pressure sleeve 6 begin to move upwards. As the pressure sleeve 6 moves upward, the check valve closes under the action of the spring 22 and the well pressure acting on the valve plate 19.

invention formula

Claims (3)

1. A device for eliminating gazoneftevodozheniye at the wellhead, containing a check valve and a control mechanism for it, including a housing with nozzles for connecting pipelines and valves and a nut, a stop sleeve, a drive shaft and a handle Ensuring the reliability and safety of the device operation by ensuring the unloading of the drive shaft from the action of well pressure, the drive shaft is made with interconnected axial and radial channels and an outer stepped protrusion With its upper end with the thrust bushing, the annular cavity associated with the axial channel is plugged at the top and open at the bottom, the drive shaft is externally threaded in the lower part, and the thrust sleeve is installed with the possibility of axial movement, is fixed against rotation and has an internal thread, the counter thread of the drive shaft, while the area of the upper end of the outer stepped protrusion is equal to or greater than the area of the lower end of the drive shaft. 2. The device according to claim. about t and In particular, in the axial channel of the drive shaft there is a movable separation piston. 3. A device according to claim 1, characterized in that a thrust bearing is installed below the lower end of the outer stepped protrusion of the drive shaft. Fi.Z