SU1286811A2 - Well double-acting piston hydraulic motor - Google Patents

Description

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1 The invention relates to a technique: a pump-building used, often carried, for mechanized production of oil.

The purpose of the invention is to demonstrate the efficiency and reliability of work.

Fig. 1 shows a double action deep piston hydraulic motor, with the pistons running upwards; in fig. 2 - the same, with the stroke of the pistons down.

The double-action deep piston hydraulic motor is part of the hydraulic piston pump unit 1J which is run into the well 3 on pipes 2, where its tail (lower) part is included in the sealing device 4, for example, a packer, and contains a double-acting pump 5 and double hydraulic engine 6 action The hydraulic motor 6 includes a piston 7s cylinder 8, a main spool 9, a guide bushing 10 and an auxiliary spool 11.

On the power rod 12, the upper longitudinal 13 and lower 14 grooves are made. On the main spool 9, there are large 15, small 16 heads, radial windows 17 and 18 of power, respectively, larger and small diameters, and a throttle channel 19. In the guide sleeve 10, windows 20 and 21 are large.

Auxiliary spool 11 consists of a small head 22 and a large head 23 having a central channel 24. In the auxiliary spool 11 there is a radial hole 25 a and on the generatrix of the inner surface of the main spool 9 on both sides of the power windows 17 there are longitudinal throttle channels 26 and 27. The upper end of the small head 22 of the auxiliary spool 11 by the axial channel 28 communicates with the annular space of the low-pressure cavity 29.

In the radial channel 30, the low pressure from channel 28 is constantly co- (It is with the inner surface of the main spool 9. At the same time, the location of the channel 30 is such that when the spool 9 is in the lowest position, channel 30 through window 17, throttle channel 19, window 18 is engaged with the control chamber 31. With the top position of the main spool 9, the radial channel 30 is cut off by a slotted seal

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by either the window 17 or the high-pressure zone 32. For any intermediate position of the main spool 9, the control chamber 31 is connected to the back- ground 5 or to the high-pressure cavity 32 through the window 20, the throttle channel 19, the window 17 and the throttle valve the groove 27, or with the low pressure cavity 29 through the window 21, the throttle channel 19, the window 17, the throttle channel 26, the radial 30 and the axial 28 channel.

In the housing 1 of the hydraulic engine 6, there are also windows 33 and 34. And in the guide bushing 10 there is an axial channel 35 which constantly connects the upper end of the large head 23 of the auxiliary valve 11 with a cavity

32 high pressure and control flange 36.

The double-action deep piston hydraulic motor works as follows.

The working fluid through pipes 2 from the high-pressure cavity 32 enters the main spool 9. When the spool 9 is in the lower position, the working fluid through the window 33 enters the piston 7 of the hydraulic motor 6. From the supra-piston cavity of the hydraulic engine 6, the return fluid is forced into the low-pressure cavity 29 through window 34. When this happens, the piston of the pump 5 moves upwards, the suction stroke c is performed. the lower cavity of the pump 5 and the pumping stroke in the upper cavity.

When the piston 7 of the hydraulic engine 6 approaches, to its upper position, the control chamber 31 along the groove 14 communicates with the high-pressure cavity 32. In this case, the main spool 9 moves to the extreme upper position, the working fluid through the window 17 enters the above-piston cavity of the hydraulic engine 6, and the return fluid flows from the substep cavity through the windows

33 and 34 are forced into the low pressure cavity 29.

The piston 5 of the piston moves downwards and the suction stroke in the upper cavity of the pump 5 and the pumping stroke in the lower cavity occur,

When the piston 7 of the hydraulic engine 6 approaches, the control chamber 31 by the groove 13 communicates with its low pressure 30 cavity to its lower position

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Claims (1)

DOUBLE DOUBLE ACTION PISTON HYDRAULIC according to author. St. No. 1245754, characterized in that, in order to increase the efficiency and reliability of operation, a radial channel is made in the guide sleeve with the possibility of constant communication of the annular space of the well through the radial channel and power windows with a throttle channel, and on both sides of the power windows along the generatric inner the main spool surface has longitudinal throttle grooves. Q N0 • 1286811