SU1737105A1 - Pressurizer for tubing - Google Patents

Abstract

Usage: in the oil and gas industry as when testing lowered into the well pumping pipes for tightness, and when draining the liquid from the column of pumping pipes using drainage devices with calibrated safety element, destroyed by hydraulic impact. SUMMARY OF THE INVENTION: Device for generating pressure in a tubing string

Description

Yash

contains a plunger pump, the discharge part of which is made in the form of a hollow body 1 connected coaxially with a column of pump tubes 2. The hollow body 1 is equipped with an outlet valve 5 installed at its upper end and having a sleeve 4. The invention relates to the oil and gas industry, namely devices for crimping the tubing string and tearing the tared safety element of the drain unit.

It is known that the Azinmash-35 mobile pumping unit, which contains a plunger pump and a valve head with a suction and discharge valves, located in the housing, a suction inlet with a return valve, is used to pressurize the column of pumping pipes and drain the liquid from it by hydraulic breaking the calibrated safety element of the drain unit. valve and filter installed in the discharge part of the pump pressure gauge and safety valve. The plunger pump described is driven by an internal combustion engine.

The use of the Azinmash-35 unit is costly, which is a disadvantage.

The purpose of the invention is to reduce costs in carrying out operations associated with the sprinkling of a tubing string and breaking the calibrated safety element of the drain unit directly at the well, using the tubing string that is lowered and lifted by a tubular elevator as a drive element of a plunger pump.

To achieve this goal, the device is equipped with an additional hollow body, having a coupling at the upper end with a drain valve made in the form of a pump discharge part mounted on the faceplate of the well and connected to the pump string, the plunger pump is located on diametrically opposite sides of the additional hollow body and made in the form of plunger-cylinder pairs installed parallel to the additional hollow body, the upper ends of the cylinders of which are associated with the valve head and the lower ends of the cylinder head The trail is mounted on the upper end of the hollow body 1 with the possibility of interaction with the pipe elevator 3. A valve head 6, a pressure gauge 18 and a safety valve, 3 sludge, are connected to the inner surface of the hollow body 1.

by the addition of an additional hollow body, the plungers are arranged to exit downward from the cylinder cavity and are connected to the faceplate, the coupling with the

The valve has a surface for gripping it with a pipe elevator.

Fig. 1 shows a device for generating pressure in a tubing string, front view; Fig.2 is a view along the arrow

And in figure 1; on fig.Z - section bb in fig, 2. The device is a double-plunger pump with an additional hollow body 1 (figure 1), the lower end of which is connected to the column of pump tubes

2, and the upper one has a surface for gripping it with a pipe elevator 3 by a coupling 4 with a drain valve 5. An additional hollow body 1 is connected to valve heads 6 located on diametrically opposite sides of body 1, Each valve head has a suction channel 7 with a suction valve 8, pressure valve 9 with pressure channel 10 (FIG. 3). The plunger pump consists of a cylinder 11 and a plunger 12, which are located on diametrically opposite sides of the additional hollow body 1 and parallel to the latter, Cylinders 11 in the lower part

connected to the housing 1 on the base 13. The free lower end of the plunger 12 is connected to the flange 14 by means of a pin 15, and the flange 14 is in turn attached to the faceplate 16 by means of bolts 17.

To control the pressure in the tubing string, a pressure gauge 18 is installed on body 1, and a safety valve 19 is installed to limit the pressure. Suction ports 7

the valve head 6 is connected to a manifold 20, to which a flexible hose 21 is attached. At the loosened end of the sleeve 21, a receiving branch pipe 22 is installed with a check valve 23 and a mesh 24.

The device for creating pressure in the column of pumping pipes operates as follows.

When the pumping tube string 2 is completed in the well, the plunger pump for the upper part of the housing 1 is caught by the pipe elevator 3, the lower end of the housing 1 is wrapped in the column of the pump tubes 2, the flange 14 is mounted on the faceplate 16. The plungers 12 are fixed in the flange 14 by the pins 15 (Fig .one). The suction port 22 is immersed in a container (not indicated) with water, the drain valve 5 is opened.

1 shows the upper position of the cylinders 11 and the valve head 6. When lowering the column of pump tubes 2, and therefore the cylinders 11 connected to the valve head b and the housing 1, the liquid in the cavity 25 of the cylinders 11 is displaced into the hollow body 1 through the channels 10 In this case, the suction valve 8 is closed and the discharge valve 9 is open.

When lifting the column of pump tubes 2 on the stroke of the plunger 12, the liquid is sucked from the receiving tank (not specified); the check valve 23 and the intake valve 8 are opened by the flow of liquid, and the discharge valves 9 are closed. The liquid flows through the suction channels 7 into the cavity 26 of the cylinders 11. The gas in the column of pumping pipes 2 is released during the initial cycles of the pump through the drain valve 5, and after the bleeding is closed, the column of pumping pipes 2 is crimped.

When lowering the column of pumping tubes, its mass is transmitted as a force acting on the plungers 12, and the liquid in cylinders 11 passes through channels 10 to the column of pumping tubes 2, creating pressure in it that is controlled by the operator of the lift gauge 18 or derived to the driver through a flexible communication gauge.

After completion of the crimping or breaking of the calibrated safety element of the drain unit, the pump is removed from the installation site (dismantled)

The use of a device for creating pressure in a column of pumping pipes allows one to avoid the costs associated with the use of a mobile special pumping unit (Azinmash-35), which creates new opportunities for urgently solving issues of pressure testing of a column of pumping pipes, etc. regardless of the unit Azinmash-35

Claims (1)

Invention Formula A device for creating pressure in a column of pumping pipes, comprising a plunger pump placed in a housing and a valve head with an inlet and discharge valves, a inlet with a check valve and a filter, a pressure gauge and a safety valve installed in the discharge part of the pump, in order to reduce costs during operations associated with the crimping of the tubing string, and to break the tared safety element of the drain node directly at the well as an element of On the plunger pump input, a column of pumping pipes was used, lowered and lifted through a pipe elevator, the device is equipped with an additional hollow housing with a drain valve, which is mounted on a face plate and connected to a column pumping pipe, at the upper end, The plunger pump is located on diametrically opposite sides of the additional hollow body and is made in the form of plunger pairs installed parallel to the additional hollow body. p - a cylinder, the upper ends of the cylinders of which are connected to the valve head, the lower ones - to the base of the additional hollow body, and the plungers are arranged to exit down from the cylinder cavity and connected to the faceplate, the coupling with the drain valve has a surface for gripping it with a pipe elevator . Vida sh 18 nineteen t 17 FIG. 2 20 21 -22 2J gn 17 & sixteen 26 Fig.Z Bb