SU757768A1 - Well diaphragm pump - Google Patents

Description

The invention relates to hydraulic engineering, in particular to pumps for volumetric displacement, namely, to borehole diaphragm pumps, and is intended for pumping liquid 5 fluids and lifting fluid from wells, including aggressive fluids.

A well bore diaphragm pump containing a hydropulsator in the form of a hydraulic rod, a case mounted on it, in which an elastic tubular diaphragm is located, encompassing a perforated core and separating its internal cavity from the cavity formed by the diaphragm and core-15 with the start, as well as suction and discharge valves p].

The disadvantage of the known pump is -. The low efficiency of its operation when lifting liquids from large Glu-20 bin, is caused by the constant impact on the elastic tubular diaphragm of the hydrostatic pressure of the working fluid column in the hydraulic rod, which leads to a pre-test voltage of the diaphragm walls. This, in turn, requires a thickening of the walls of the diaphragm in comparison with their required thickness for performing a cycle, injection, which is 30

2

It adversely affects the work of the diaphragm due to the adverse effect of hysteresis, which is most intensely manifested due to insufficient heat removal from the thickness of the elastic material during the pump operation.

The purpose of the invention is to improve the reliability of the pump and increase the depth of pumping fluid well wells.

This goal is achieved by the fact that the inner surface of an elastic tubular diaphragm is equipped with an even number of permanent magnets fixed to it with alternating poles, and the perforated core is made of a ferromagnetic material.

FIG. 1 schematically shows a downhole diaphragm pump with surface equipment, a general view; On fng.2 - the same, cross section.

The borehole diaphragm pump comprises a housing 1, a perforated core 2, made of ferromagnetic material, and an elastic tubular diaphragm 3 that envelops it outside.

Spacers 5 are made of non-magnetic material, excluding the interaction of the magnets themselves. In the lower part of the housing 1, a suction valve 6 is installed, and in the upper .- a discharge valve 7. The pump is lowered into the well 8 on the hydraulic rod (pipe) 9 and installed on the packer 10. The hydraulic rod 9 on the surface is connected to the remote hydraulic control mechanism 11, which communicated with the power pump 12 and the drain tank 13.

Borehole diaphragm pump works as follows.

Its full working cycle includes a discharge cycle, during which the elastic tubular diaphragm 3 and permanent magnets 4 fixed on its inner surface move from the perforated ferromagnetic core 2 to the inner walls of the housing 1, and the suction cycle during which the elastic tubular diaphragm Zi is fixed on its inner surface, the permanent magnets 4 move from the inner walls of the housing 1 to the perforated ferromagnetic core 2.

In the initial position, the elastic diaphragm 3 and permanent magnets with alternating poles fixed on its inner surface under the action of the elastic forces of the diaphragm and the magnetic attraction of the permanent magnets to the perforated ferromagnetic core 2 interact with the ferromagnetic core 2 and hold with the appropriate force reserve, hydraulic the pressure of the liquid column in the hydraulic rod (pipe) 9.

Under the action of the hydrostatic pressure of the produced fluid, the suction valve 6 is open and the extracted fluid 40 fills the space between the tubular elastic diaphragm 3 and the inner walls of the housing 1.

Under the influence of the working pressure from the surface power pump 12 supplied through the remote hydraulic control mechanism 11 and the hydraulic rod 9 to the internal cavity of the perforated ferromagnetic core 2, the elastic diaphragm 3 and the permanent magnets fixed on it. You 4 move in the radial direction to the inner walls of the housing 1. Located between the elastic diaphragm 3 and the inner walls of the coro 1, the produced fluid is displaced through the open discharge valve. pan 7 to the surface. A diaphragm pump performs a discharge cycle. As the elastic diaphragm 3 deforms, its elastic forces increase, and the addition of permanent magnets 4 with alternating poles to a perforated ferromagnetic core weakens, resulting in the required external force (pressure of the working fluid) for 5

(ABOUT

15

20

thirty

35

45

50

stretching the pre-stressed elastic diaphragm 3 and the movement of available magnets 4 remain almost constant. This ratio is provided by the selection-calculation of the power properties of the elastic diaphragm 3 and the permanent magnets 4.

With the completion of the discharge cycle, due to the expansion of the elastic diaphragm to the limit, i.e. before contact with the inner walls of the housing 1, the remote hydraulic control mechanism 11- stops the supply of working fluid to the perforated ferromagnetic core 2 and connects the hydraulic rod 9 to the drain tank 13. Because during the discharge cycle, the elastic diaphragm 3 acquires potential energy due to its elastic forces, with the shutdown of the working pressure under the action of the elastic forces of the elastic diaphragm 3 and the forces of magnetic attraction of permanent magnets 4. with alternating poles to perforated ferromagnetic To the second core 2, the elastic diaphragm 3 with permanent magnets 4 fixed on it returns to the initial position, i.e. to the perforated ferromagnetic core 2, displacing from under Himself through the perforated ferromagnetic core 2, hydraulic rod 9 and remote hydraulic control mechanism 11 non-pressure working fluid to the drain tank 13. With this movement of the elastic diaphragm 3 and permanent magnets 4, a reduced pressure occurs in the internal cavity of the housing 1 pressure and through the suction valve b, with the disconnected pressure of the column of produced fluid in the annulus of the well and injection valve 7, the produced fluid from. the well enters' into the internal cavity of the housing 1, the suction cycle is performed. At the same time, as in the discharge cycle, a constant excessive force is maintained over the hydrostatic pressure of the liquid column contained in hydraulic rod 9, as with the reduction of the elastic forces of the elastic diaphragm 3 as the perforated ferromagnetic core 2 decreases, the forces of magnetic attraction increase permanent magnets 4 with alternating poles to the ferromagnetic core 2. With the completion of the suction cycle, which is caused by the return, the elastic diaphragm 3 to its original position, the removal of free-flow working liquid according gidroshtange mechanism 9 is stopped and hydraulic remote '.No open 11 again connects the power working pressure of the pump 12 to the f nasosu.i working cycles are repeated.

Thus, the presence of permanent magnets with a diaphragm;

five

757768

6

alternating poles, fixed on the elastic diaphragm, provides increased reliability and durability of the pump, as well as an increase in the pumping depth of the produced fluid from the well.

Claims (1)

Claim A borehole diaphragm pump containing a hydropulsator in the form of a hydraulic rod, a housing mounted on it, in which an elastic tubular diaphragm is located, covering the perforated core and separating its internal cavity from the cavity, r-15 diaphragm to the housing, as well as suction and discharge valves, characterized in that, in order to increase its reliability and increase the pumping depth of the fluid from the well, the inner surface of the elastic tubular diaphragm is equipped with an even number of permanent magnets with alternating poles fixed on it, and perforated The core is made of ferromagnetic material.