SU1483042A1 - Apparatus for intermittent separate production of oil and water from well - Google Patents

Abstract

Invention m. used in the production of flooded oil. The purpose of the invention is to increase the reliability and efficiency of operation of the device when changing the ratio of oil and water in the production of the well (C), mainly inclined. In C, a packer and a hollow shank (X) 3 are installed, forming an annular gap communicated with the last one, and a flow switch with spool 7, which alternately communicates an annular gap and an 8 X 3 cavity with nadpaknerny space 9 C. The flow switch is designed as two assistance to the transition nozzle 12 with radial channels 13 of cylinders 14 and 15 with pistons 16 and 17, respectively, moving reciprocally. The piston (P) 17 is made hollow, and in X 3, a jumper 19 is located in its upper part, and a receiving chamber is located in the lower part. The pipe 12 and the cylinder 15 with P 17 placed under the jumper 19, and the cylinder 14 with a piston 16 over the latter. In P 17, exhaust ports 23 and an inlet port 25 are made. In the podporshnevoy cavity 24 and the receiving chamber floats are placed, overlapping respectively the window 25 and the inlet channel of the receiving chamber, the floats being made of a material that has a density intermediate between the oil water. The spool element 7 has a diameter smaller than the diameters of the pistons 16 and 17, is connected to them, is installed in the pipe 12 and in turn informs the radial channels 13 and the over piston cavity 22 P 17 with the sub piston cavity 27 P 16. Communication chamber with annular gap and internal cavity 8 X 3, podporshnevoy cavity 24 P 17 with the said gap and nadporshnevoy cavity 26 P 16, and podporshnevoy cavity 27 last nadpaknernyh space 9 C, and the connection of the radial channels 13 to the cavity 8 provides alternate pumping out of stratified oil and water b formation of stable emulsions. Element 7 is switched by the pressure drop acting on one of the pistons 16 or 17 and arising when the inlet channel of the receiving chamber or window 25 closes with one of the floats, respectively, at the lower and upper positions of the oil-water interface. The switching of the flows occurs automatically regardless of the change in the content of the phases in product C, at the same time eliminating the need for moving X 3 to the oblique C. 6 sludge.

Description

FIG. 2

and an 8 X 3 cavity with an over-packer space of 9 C. The flow switch is designed as two communicated by means of a transition nozzle 12 with radial channels 13 of cylinders 14 and 15 with pistons 16 and 17, respectively, moving reciprocatingly. The piston (II) 17 is made hollow, and in X 3 a jumper 19 is located in its upper part, and a receiving chamber is located in the lower part. The pipe 12 and the cylinder 15 with P 17 placed under the jumper 19, and the cylinder 14 with a piston 16 over the latter. In P 17, exhaust ports 23 and inlet window 25 are made. In the sub-piston cavity 24 and the receiving chamber, floats are placed, overlapping respectively the window 25 and the inlet channel of the receiving chamber, the floats being made of material, which has a density intermediate between oil densities and water. The spool element 7 has a diameter smaller than the diameters of the pistons 16 and 17, is connected to them, is installed in the pipe 12 and in turn communicates radial channels 13 and the piston wall 22 of Item 17 alternately with the sub-piston cavity 7 P. 16. Post receiving chamber with an end ring and inner core 8X3, podporshnevoy cavity 24 P 17 with the said gap and supra-piston cavity 26 P 16, and podporshnevoy cavity 27 last nadparkernym space 9 C and the connection of the radial channels 13 to the cavity 8 provides alternate pumping out of stratified oil and water formation of stable emulsions. Element 7 is switched by the pressure drop acting on one of the pistons 16 or 17 and arising when the inlet channel of the receiving chamber or window 25 is closed by one of the floats, respectively, at the lower and upper positions of the oil-water interface. Flow switching occurs automatically regardless of the change in the content of phases in product C, at the same time eliminating the need to move X 3 to oblique Co 6 or

The invention relates to the production of flooded oil from wells, mainly sloping, equipped with submersible pumping units and preventing the formation of stable emulsions.

The aim of the invention is to increase the reliability and efficiency of operation in inclined wells when changing the ratio of oil and water in the production of a well.

Figure 1 shows a device for the periodic separate separation of oil and water in the process of pumping oil, a general view; figure 2 - node 1 in Fig; in FIG. 3, node II in FIG. 1} in FIG. 04, a device in the process of pumping out water, a general view; in fig. 5 - node I in figure 4; figure 6 - node II in Fig „4.

A device for periodically separating oil and water from well 1 (smfg. 1,4) contains pa0

five

0

core 2 and a hollow cylindrical shank 3, which forms with the walls 4 of the borehole 1 an annular gap 5, which communicates with the shank 3 in its lower part, as well as a flow switch 6 with a spool element 7 installed with the possibility of alternate communication of the annular gap 5 and the cavity 8 of the shank 3 with nadpakerny. borehole space 9 1. The device is equipped with floats 10 and 11, flow switch 6 is made in the form of two communicated by means of a transition nozzle 12 with radial channels 13 of cylinders 14 and 15 with pistons 16 and 17, respectively, mounted coaxially to the shank. 3 with the possibility of reciprocating movement. One of the pistons 17 is made hollow, the shank 3 is plugged on the side of the lower end 18, and is provided with a jumper 19 and a receiving chamber 20 with an inlet duct 21 installed in accordance with

In the upper and lower parts, the adapter 12 and the cylinder 15 with a hollow piston 17 are placed under the bridge 19, and the second cylinder 14 with the piston 16 is located above the bridge 19. The inlet channel 21 is located in the lower part of the receiving chamber 20 and in the lower piston 17, exhaust ports 23 are made from the side of the piston cavity 22, and an inlet window 25 from the side of the piston cavity 24, the floats 10 and II being placed respectively in the piston cavity 24 of the lower piston 17 and the receiving chamber

20 with the ability to overlap, respectively, the inlet window 25 and the channel

21, at the upper and lower positions of the oil and water interface, the float material 10 and 11 has a density intermediate between the oil and water densities, the receiving chamber 20 is in communication with the annular gap 5, and through the inlet channel 21 - with the inner cavity 8 of the shank 3, sub-piston cavity 24 of lower piston 17 - with annular gap 5 and supra-piston cavity 26 of upper piston 16, sub-piston cavity 27 of the latter - with nadpaknerny space 9 of well I, internal cavity 28 of lower piston 17 - with its supra piston and sub piston cavity 22 and 24 respectively legally through the exhaust and inlet ports 23 and 25, respectively, the radial channels 13 of the transition nozzle 12 are connected to the internal cavity 8 of the stem 3, and the spool element 7 is made with a diameter

d, smaller diameters D, and П „of the pistons 16 and 17, are connected with them and installed in the transition nozzle 12 with the possibility of alternately communicating the radial channels 13 and the above piston cavity 22 of the lower piston 17 with the piston cavity 24 of the upper piston 16, for implementing this message The spool element 7 has holes 29 and 30 connected by a channel 31. To connect the piston 24 of the lower piston 17 to the piston 26 above the upper piston 16, drill 32 serves. The pistons 16 and 17 can be provided with clamps 33 and 34, respectively, and the shneva cavity 24 of the lower piston 1 7 and the receiving chamber 20 are drainage channels 35 and 36, respectively. In the upper cylinder 14 in the zone of section 830426

Placement of the piston cavity 27 made the hole 37. The annular gap 5 communicated with the piston cavity 24 of the lower piston 17 through the channel 38, and the receiving chamber 20 to the channel 39. In well 1, a pump 41 is installed on the column of the lifting pipes 40. The device works as follows.

In a flooded well, oil, having a less than water density, floats, and water collects in the lower part of the annular gap 5 and in

15 of the cavity 8 of the shank 3. When the pump 41 is operating, the liquid from the above-packer space 9 enters the ground surface through the column of lifting pipes 40. When pumping out the backflow of oil (smofig.1, 2, 3), the spool valve 7 is in the lowest position where it can be held by the clamps .33 of the upper piston. Oil from the upper part of the annular gap 5 through 5 through the channel 38 enters the lower cylinder 15 of the flow switch 6, from where through the inlet port 25, the internal cavity 28 and the outlet ports 23 of the lower piston 17 enter the piston cavity 22 above, and from there through holes 30 , the channel 31 and the holes 29 of the spool element 7 and the holes 37 of the upper cylinder 14 enters the nadpakerno space

5 9 wells 1. The float 10, which is in oil, is in the lower position, and the float 11, which is in the water, is in the upper position. The place of the pumped oil is taken by the water entering the well. When the boundary between the oil and water rises to the level of the channel 38, the piston cavity 24 is filled with water, the float 10 rises and closes the inlet window 25 of the lower

5 pistons 17, thus stopping the supply of fluid to the 9-nadakner space. The fluid level and pressure in the latter will begin to decrease, and the pressure in the annular gap 5 0 will increase due to the influx of fluid into the well 1e. As a result, the pressure on the piston 17 from below will be greater than above , and the piston 16 will be balanced. Under the action of a picking force, when the magnitude of the force generated upward overcomes the resistance of the latches 33 and the frictional force, the slide valve 7 with the pistons 16 and 17 will move

c in the upper position (see Fig. 5) where piston clamps 34 will be held. Radial channels 13 of the transition nozzle 12 will be opposite holes 30 of the 7C spool element. Water from the bottom of the annular gap 5 enters the receiving chamber 20 through channel 39. from it through the inlet channel 21 - into the internal cavity 8 of the stem 3 “Then the water will flow through the channels 13, holes 30, channel 31 and holes 29 into the sub piston cavity 27 of the upper piston 16, a-from it into the nadpakerov space 9 and into the pump 41. Water pumped out of the ring times 5, will be replaced by oil, which will also fill the piston cavity 24 of the lower piston 17, and water will be removed through the drainage channel 35, as a result of which the float 10 will occupy the lower position. Oil suction during the period of pumping out of water is prevented by sealing between the transition nozzle 12 and the spool element 7, which are a plunger-cylinder type pair.

In the process of pumping water, the interface between the fluids will reach the level of the channel 39, the receiving chamber 20 will be filled with oil, the float 11 will lower and block the inlet channel 21 (shown by the dotted line in FIG. 6). With continued pumping of fluid by the pump 41, the pressure in the overpack space 9 and the sub-piston cavity 27 of the upper piston 16 decreases. The pressure in the annular gap 5 will increase due to the influx of fluid from the formation. At the same time, the pressure in the cavities 24 and 26, which are hydraulically connected to each other (by drilling 32) and to the annular gap 5, will increase. As a result, a pressure differential will occur acting on the difference of the areas of the upper piston 16 and the spool element 70. When this differential is sufficient to overcome the forces of the clamps 34 and the friction forces, the spool element 7 will move to the lower position (see figure 2) and the process of pumping oil from the upper part of the annular gap 5 again will begin. When the interface between fluids is raised, the receiving chamber Par 20 is refilled with water and the float 11 moves upwards.

Thus, flow switching occurs automatically, regardless of the change in the content of the phases

in production, when the duration of each pumping cycle changes. At the same time, in the inclined wells friction of the shank 3, made in the prototype floating, is prevented

when moving about the wall 4 wells 1. This embodiment of the device increases the reliability and efficiency of operation in inclined wells.

Claims (1)

Invention Formula A device for periodically separating oil and water from a well, containing a packer and a hollow cylindrical shank, which forms an annular gap with the well walls, which communicates with the shank in its lower part, as well as a flow switch with a slide element installed with the possibility of alternate annular gap and the cavity of the shank with the above-packer space of the well, characterized in that, in order to increase the reliability and efficiency of operation in inclined wells with changing In the production of oil and water, the device is equipped with floats, the flow switch is designed as two cylinders with pistons mounted coaxially to the shank with the possibility of reciprocating movement, one of the pistons is hollow, the shank is plugged with the sides of the lower end and is equipped with a jumper and a receiving chamber with an inlet channel installed in its upper and lower parts, respectively, a transitional pipe and a cylinder with a hollow piston The second cylinder with a piston is located above the bridge, the inlet channel is located in the lower part of the receiving chamber and in the lower piston; exhaust ports are made on the side of the piston cavity, and on the side of the piston cavity, the floats are placed in the piston cavity of the lower piston and the receiving chamber with the possibility of overlapping, respectively, the inlet ports and the channel at the upper and lower positions of gras. 91 the oil and water section, the float material has a density intermediate between the oil and water densities, the receiving chamber communicates with the annular gap and through the inlet channel with the internal cavity of the shank, the piston cavity of the lower piston with the annular gap and the supra piston density of the upper piston, the piston cavity the latter — with the above-packer well space, the inner cavity of the lower piston — with its supra-piston and sub-piston cavities 3X1 / W -rh W BEFORE - / 41 f AND fa FIG. one 2 } 0 respectively, through the outlet and inlet-window, the radial channels of the transition nozzle are connected to the inner cavity of the shank, and the spool element is made with a diameter smaller than the diameters of the pistons, connected to them and installed in the transition nozzle with the possibility of alternately communicating the radial channels and the piston lower piston cavity with the piston cavity upper tailor. Well Fig.Z FIG. k & -SH 33 17 L FIG. five 6