SU927950A1 - Hydraulic device for producing high-pressure jets - Google Patents

Description

I

The invention relates to the oil and gas industry and can be used in the drilling of wells, pulsed impact on the formation, the implementation of hydraulic fracturing.

A hydraulic device is known that includes a housing with cylindrical chambers located along the perimeter, with a central channel with a bore, along which the rotary valve Cl1 is placed, along the axis of the housing.

A disadvantage of the known device is the limited size of the cylindrical chambers, which reduces the multiplication factor.

A hydraulic device for generating high-pressure jets is also known, including a housing, an adapter, a hollow valve, nozzles, a hollow piston connected to a hollow rod.

The disadvantage of this device is the low consumption of the working fluid and the low multiplication factor t2.

The aim of the invention is to increase productivity by increasing the pressure multiplication factor.

This goal is achieved by the fact that the adapter is equipped with a drain valve with a thrust passing inside the hollow piston and the rod, while a bypass channel is provided in the adapter.

FIG. Figure 1 shows schematically a hydraulic device in the position of suction of the working fluid through a check valve under the plunger, a general view; in FIG. 2 - the same, starting time. la working stroke.

Claims (2)

The hydraulic device comprises a housing 1 with a separation sleeve 2 installed in the middle part. The housing 1 is connected via an adapter 3 to a hollow valve housing 5 installed in the housing k with the possibility of movement and spring-loaded 6 to seat 7, made in adapter 3i amer 8 above the hollow valve 5 is connected by a drain hole 9 in body k with the annulus space. The chamber 10 in the hollow valve body 5 is permanently connected by a channel 11 to the inner cavity 12 of the column pipe 13 and channel 1 through a check valve 15 to the inlet channel 16 in the housing 17. The housing 17 is rigidly connected to the housing 1 of the device, In the housing 1 of the hydraulic The devices under the divider 2 are mounted with a hollow piston 18 with a nozzle 19, connected with a hollow rod 20, passing inside the sectioned section, a sleeve 2 and resting on a piston 21 in contact with the piston 22. The chamber 23 under the hollow piston 18 is connected by a sump channel 2 with axial channel 25 hollow stock The axial channel 25 through the radial holes 2b is connected to the chamber 27 above the piston 21. The chamber 28 under the hollow piston 18 and the chamber 29 under the piston 21 are connected respectively by the channels 30 and 31 to the cavity of the well. The head 32 with nozzles 33 is fixed at the lower end of the housing 17. The nozzles 33 are connected by a channel 3 to an inlet channel 16 and a high pressure chamber 35B of the adapter 3, a bypass channel 36 and an axial channel 37 are installed, in which a drain valve 38 with a seal 39 is installed The lower end 40 of the drain valve 38 extends into the chamber 23 and is connected with a pull that freely passes through the opening 42 of the hollow piston 18 inside the axial channel 25 of the hollow stem 20. The ha 41 includes an end stop 43, which has a diameter greater than bore diameter 42 of hollow piston 18. Hollow valve 5 in the seat on the saddle 7 in adapter 3 contains 44 when installed. Inside the valve 5, an adjusting nut 45 is installed. A spring 46 is installed between the adjusting nut 45 and the end of the drain valve 38. The hydraulic device for creating high-pressure jets works as follows. The working fluid from the cavity 12 of the tubing 13 through channel 11 is fed into the chamber 10, then through the channel 14 through the check valve 15 is fed into the inlet channel 16 9 and the high pressure chamber 35. Part of the working fluid through the channels 3 is fed to the nozzles 33 and pours out. The pressure of the working fluid in the high-pressure chamber 35 acts on the plunger 22 and moves it upwardly together with the piston 21, on which the rod 20 connected to the piston 18 rests. The working fluid from the chamber 27 above the piston 21 through the radial holes 26 in the hollow stem 20, along the axial channel 25, the inlet channel 24 and the opening 42 of the piston 18 enters the chamber 23 above the piston 18 and further along the bypass channel BZ and the channel inside the hollow valve 5 enters the chamber 8, from where it flows freely through the drain hole 9. The plunger 22 through the piston 21 and the rod 20 brings the piston 18 to the lower end 40 of the drain valve 38. The hollow 18 acts on the valve 38, (moving its lower end 40 upwards. The drain valve 38 approaches the hollow valve 5, compresses the spring 46 and presses it the pressure of the working fluid to the plunger 22, closing the channel inside the valve 5. After the drain valve 18 closes the channel inside the valve 5, the speed of lifting the plunger is reduced. into the annulus. The force from the pressure of the working fluid on the plunger 22 and the force from the action of the drain valve 38 on the valve 5 exceeds the force acting on the valve 5 from the spring 6 and the pressure of the working fluid on the tide.44. The hollow valve 5 is detached from the seat 7 and opens the channel for the passage of the working fluid into the chamber 23 and further along the inlet channel 24, the axial channel 25 and through the radial holes 26 - into the chamber 27 above the piston. 21. The pressure of the working fluid acts on the pistons 18 and 21 and presses the drain valve 38 up. The hollow piston 18 and the piston 21 move downwards. The plunger 22 at the same time displaces the working fluid through the nozzles 33 under high pressure. When the hollow piston 18 approaches, together with the rod 20, the piston 21 and the plunger 22 in the lower position, the piston 18 engages with an AZ stopper 41 stop, which is connected to the drain valve 38 and does not fall down. The drain valve 38 is detached from the end of the hollow valve 5 and opens it for free flow of the working fluid into the chamber 8 and through the drain hole 9 into the annulus. The hollow valve 5 is compressed by the force of the spring 6 on the saddle 7 and closes the channel for supplying the working fluid to chambers 23 and 27. At the same time, the check valve 15 in the housing 17 opens. , including jf0, 4 case, adapter, hollow valve, nozzles, hollow piston connected to a hollow rod, so that, with the aim of increasing productivity by increasing the pressure multiplication factor, ehodnik provided with a drain valve with a draft type extending within the hollow rod and the piston, wherein the adapter is configured in the Bypass channel. Sources of information | sprintye into account during the examination. 1. USSR author's certificate N 417600 / class. E 21 B 7/18, 1971. 2. USSR author's certificate VF 192112, cl. E 21 V 7/13, 196 (prototype).