WO2011159189A1

WO2011159189A1 - Method for extracting stratal non-gasified liquid

Info

Publication number: WO2011159189A1
Application number: PCT/RU2011/000156
Authority: WO
Inventors: Анатолий Михайлович ДАНЧ; Василий Алексеевич НОВАЕВ; Владимир Денисович РОМАНОВ; Денис Владимирович РОМАНОВ; Елена Владимировна РОМАНОВА
Original assignee: Danch Anatoliy Mihajlovich; Novaev Vasiliy Alekseevich; Romanov Vladimir Denisovich
Priority date: 2010-06-16
Filing date: 2011-03-14
Publication date: 2011-12-22
Also published as: RU2424448C1

Abstract

The method for extracting stratal non-gasified liquid can be used for extracting stratal water and other non-gasified liquids from deep wells. The method comprises raising the liquid with pumps. A continuous stream of the liquid is created by alternating the intake and output cycles of the working chambers of interchangeable two-chamber well-drilling substitute pumps which are connected by pipelines for the extracted liquid, for the removal of exhaust gas and by an electric power supply cable. To this end, the pressure is increased in the hermetically sealed well-casing annulus, in which the static level of the liquid is reduced to a level lower than the lower stage of the well-drilling substitute pump on account of the difference in the increased pressure in the well-casing annulus, the pressure in the pipeline for removing the exhaust gas, which is connected to the atmosphere, and in one of the working chambers of the pump in the lower stage of the installation. Furthermore, liquid is taken in, and the output from another chamber of all of the pumps along the extracted liquid pipeline to pumps in higher stages is created by compressed gas being passed in from the well-casing annulus. Furthermore, the intake of liquid by working pump chambers arranged higher up is ensured by liquid being output from working chambers arranged lower than the pumps.

Description

METHOD FOR PRODUCING PLASTIC NON-CARBONATED LIQUID The method for producing reservoir non-carbonated fluid relates to the field of water production, and can be used to produce produced water and other non-carbonated fluids from deep wells.

A known method of producing reservoir fluid using a pump according to the patent

2293886 "Pump" dated 02/07/2005, published on 02/20/2007. IPC F04F 1/04, F24J 2/42, in which, when the compressor is turned on, air enters through a pipeline through a pipe filled with liquid through an inlet valve from the natural pressure of the thickness of the oil layer, or using a vacuum pump, and creates pressure on liquid, which through the gap between the end surface of the nozzle and the bottom, overcoming the resistance of the outlet valve, enters a special container, which, as a certain amount is filled with liquid, automatically rotates, turning off the compressor, and pours the liquid into the tank at a certain speed corresponding to the inflow of liquid from the cylinder working volume through the inlet valve, and after the liquid has passed from the tank, the latter returns to its original position to receive the next cycle of fluid, closing one valve, turning off the vacuum pump, and simultaneously opens another valve and turns on the compressor, and the process repeats.

The method does not provide sufficient performance due to the cyclical fluid supply, due to the presence of only one working cylinder. If, when the compressor is turned on, the filling of the cylinder capacity with the liquid has stopped and the liquid level has not yet reached a certain level, and the compressor is working, air is flowing instead of the liquid, it is necessary to balance the container using a counterweight until it returns to its original position, although after such adjustment the pump will not working with the full volume of liquid filling its cylinder.

This method is not applicable for liquid extraction from great depths.

The closest in technical essence is the method according to patent RU 2325553 "Method and device for lifting fluids from wells", from 07.11.2006, published. 05/27/2008, MPK F04B 47/00, including lifting the liquid in the lower and upper stages by different pumps, in the lower stage by a submersible electric pump, and in the upper stage by a deep-well rod pump (GSHN), compartment fluid from gas, the direction of the gas in the annulus.

The liquid supply to the surface is intermittent, due to the alternation in the GHSN of the processes of absorption and pushing to the surface, which affects the performance of the method.

The performance of the submersible electric pump is higher than the performance of the main gearbox, this leads to increased wear of the first.

The pressure in the pipes remains high enough, which requires increased strength, this increases the weight of the entire structure.

The pump is poorly suited for fluid production with a high content of solids.

To supply a submersible electric pump, an electrical voltage is required, which is dangerous for people and animals, which imposes increased electrical safety requirements for this device.

The objective of the proposed technical solution is to create a reliable and easily integrated into the existing system for producing water from wells, an easy-to-use and electrically safe method (supply voltage of a downhole pump 24 Volts), which allows producing non-carbonated liquid with mechanical impurities from small and large depths, and from wells with a small debit, including.

The problem is solved due to the method of producing non-carbonated formation fluid by installing on the basis of borehole replacement pumps, including raising the liquid by pumps, while a continuous flow of fluid is created by alternating the cycles of receiving and displacing the working chambers of interchangeable two-chamber borehole replacement pumps connected by pipelines of the produced fluid and of discharging the spent gas and power cable; for this, the pressure in the sealed annulus is increased, by which the static liquid level in it is reduced to a level lower than the placement of the lower stage of the downhole substitution pump, and due to the difference in the increased pressure in the annulus of the well, with the pressure in the exhaust pipe connected to the atmosphere, and from one of the working chambers of the pump of the lower stage of the installation, liquid is received, and all pumps are displaced from the other chamber through the pipeline of the produced liquid to the upper pumps Upenu create due to receipt therein of pressurized gas from the annulus, W 201

3 in this case, the reception of liquid by the working chambers of the pumps located above is ensured by displacing the liquid from the working chambers below the located pumps.

Placement of a downhole pump for substitution of the lower stage of the installation in the well, below the static liquid level by 5-25 m .; and lowering the static liquid level to a level lower than the placement of the lower stage of the downhole displacement pump, increasing the pressure in the sealed annulus, allows the liquid to be received, due to the difference in the increased pressure generated by the compressor unit and the reduced pressure, in the exhaust and associated gas exhaust pipe connected to atmosphere, and in one of the working chambers of the pump of the lower stage of the installation.

The arrival of compressed gas into one chamber from the annulus of the well allows fluid to be displaced from other chambers of the lower stage pump and the pumps of the other stages through the produced fluid pipeline to the upper stage pumps, to use the casing space as a pipeline and compressed gas reservoir at the same time, and to use increased pressure energy , for lifting liquids by substitution pumps connected by a pipeline of produced fluid and a supporting pipeline, which simultaneously serves to drain, working and associated gases to the atmosphere.

Placing the substitution pump in the medium of high pressure gas allows it to receive liquid without creating a vacuum, and by combining the flows of exhaust and associated gases, we achieve a significant reduction in the weight of the structure by reducing the number of pipelines. At the same time, the amount of ground equipment used is reduced to one compressor unit.

By using a 24 V low-voltage electric current to control well pumps and substitution, the method meets safety requirements.

The method of producing reservoir non-carbonated fluid is carried out by installing on the basis of borehole displacement pumps, shown in the drawings, where Fig. 1 is a diagram of the installation on the basis of borehole displacement pumps with a single-stage lifting of fluid, Fig. 2 is a diagram of the installation based on borehole displacement pumps in a multi-stage lifting of Fig.3 is a schematic diagram of a borehole displacement pump, Fig.4 is a diagram of the carrier W

four

the flange of the downhole pump, FIGS. 5, 6 and 7 - the operating procedure of downhole displacement pumps.

Figure 1, 2, 3, 4, 5, 6 and 7 show: casing pipe 1 of the well, perforations of the casing 2, produced fluid 3, well pump 4, bearing pipe 5 for exhaust and associated gases, pipe 6 lifting the produced fluid, receiving pipe 7, the intermediate cable 8, the plug 9 of the lower power connector of the lower stage pump, the casing flange 10, the bearing flange 11 of the downhole pump, the gasket 12, the supporting pipe 13, the produced fluid pipe 14, the compressed gas pipe 15 a, a compressor 16 for supplying compressed gas, an electrical cabinet 17, an outlet pipe 18 of the compressor, a compressed gas pipe 19, an electrical connector 20, an electrical connector 21, a main pipe 22, a central pipe 23, an electric air distributor 24, a suction pipe 25, a discharge pipe 26 , lower electrical connector 27, upper electrical connector 28, filter nozzle 29, well pump power cable 30, compressor power cable 31, power line 32, compressor inlet 33, electric intermediate wire 34, compressed air supply valve 35, sleeve 36, support rod 37 of the intake pipe, breather 38, control section 39 of the well pump, main section 40 of the well pump, valve section 41 of the well pump, first working chamber 42, second working chamber 43 , the float chamber 44 of the first working chamber, the float chamber 45 of the second working chamber, the first double-acting magnetic float valve 46, the second magnetic double-acting float valve 47, the seat 48 of the first working chamber, the seat 49 of the second working th chamber, upper saddle 50 of the first working chamber, upper saddle 51 of the second working chamber, reed level sensor 52 of the first chamber, reed level sensor 53 of the second chamber, suction valve 54 of the first working chamber, suction valve 55 of the second working chamber, pressure valve 56 of the first working chamber chamber, discharge valve 57 of the second working chamber, suction channel 58, discharge channel 59, through-wire 60 of the power supply circuit, wire 61 of the power supply to the control unit, wire 62 of the control of the pneumatic distributor, wire 63 of the control non-distributor, wire 64 reed sensor of the first working chamber, wire 65 reed the sensor of the second working chamber, a hole 66 for discharging exhaust gases, a channel 67 for discharging exhaust gas, a channel 68 for supplying and discharging the working gas to the first working chamber, a channel 69 for supplying and discharging the working gas to the second working chamber, an electronic control unit 70, channel 71 of compressed gas.

The method of producing reservoir non-carbonated liquid is as follows.

When the depth of the formation is up to 50 meters, a one-stage liquid rise is carried out, and when it lies above 50 meters, up to 5000 meters, a multi-stage liquid rise is carried out by an installation based on interchangeable borehole replacement pumps shown in the drawings, where Fig. 1 is a diagram of a one-stage liquid rise of Fig. 2 is a diagram of a multi-stage fluid lifting; FIG. 3 is a schematic diagram of a well submersible pump; FIG. 4 is a schematic diagram of a bearing flange of a well pump; FIGS. 5, 6 and 7 are an operating procedure of well submersible pumps.

When installing the installation on the basis of interchangeable borehole replacement pumps for multistage production of non-carbonated liquid (Fig. 2), all connections are made in the same sequence as when installing a single-stage installation, with the only difference being that after installing the borehole replacement pump for the lower stage, a certain distance (5-50 m.), borehole pumps are installed to replace additional stages, the amount of which depends on the height by which the liquid must be raised, and is determined by the formula:

n = H / h

where n is the number of installation steps

N - the height by which it is necessary to raise the liquid

h is the step with which borehole replacement pumps are mounted (5-50 m.).

When installing the installation on the basis of borehole replacement pumps for producing non-carbonated liquid, to a hermetically mounted casing pipe 1 on the flange 10, a bearing flange 11, with nozzles hermetically assembled on it: a carrier 13, produced fluid 14, compressed gas 15, and electrical connectors 20 and 21, connected by an intermediate wire 34, are fastened by a supporting pipe 5, one or more stages, one below the other in the form of a string of borehole displacement pumps 4. When implementing the method, the pump of the lower stage of the installation is located in the well below the static liquid level by 5-25 m.

Consider the implementation of the method with a single-stage rise of still water (figure 1)

- the receiving pipe 7 with the filter nozzle 29 is connected by a supporting rod 37 with a sleeve 36 to the lower end of the central pipe 23 of the well replacement pump 4, with a sleeve 36 tightly closed the lower end of the Central pipe 23;

- the suction pipe 25 is hermetically connected to the receiving pipe 7, the length of the receiving pipe can be any, and depends only on how deep the liquid must be lifted;

- on the lower connector 27 tightly install the plug 9;

- the upper end of the Central pipe 23 is hermetically connected to the carrier pipe 5, and the pipe of the produced fluid 6, with the discharge pipe 26;

- to the upper connector 28 connect the cable 8.

The downhole displacement pump is lowered to the required depth, while the carrier pipe 5 is hermetically connected to the carrier pipe 13, hermetically assembled on the carrier flange 11. The pipeline of produced fluid 6 is connected to the pipe of produced fluid 14, which is also hermetically assembled on the carrier flange 11. Power cable 8 is connected to the connector 20 located on the bearing flange 11. The bearing flange 11 is mounted on the flange of the casing 10, and to ensure tightness, a gasket 12 is installed between them and tightened with bolts (in the drawing e shown). The compressed gas pipe 15 is connected to a valve 35 mounted on the outlet pipe 18 of the compressor 16 by means of a pipe 19, and the pipe of the produced fluid 14 is connected to the main pipe 22. The power cable of the downhole pump 30, connected to the electrical cabinet 17 at one end, is connected to the connector 21, located on the carrier flange 11, and connected to the connector 20 by means of an intermediate wire 34, hermetically sealed into it.

Through the cable 31, the compressor 16 is connected to an electrical cabinet 17, which in turn is connected to the power line 32.

The bearing flange of the installation on the basis of borehole displacement pumps at a single-stage or multi-stage lifting of non-carbonated liquid is structurally no different (Fig. 4) and is an assembly unit consisting of a flange 11 and nozzles hermetically assembled on it: a carrier 13, which is tightly connected to the carrier pipe of the well pump and is designed to hold it, at the same time serves to discharge the exhaust gas, produced fluid 14, used to pump the produced fluid from the well to the surface, compressed gas 15, used to supply compressed gas to the shutter bnoe space well. On the flange are also electrical connectors 20 and 21, which are interconnected by an intermediate wire 34.

Before turning on the mounted installation, in the annulus of the well create an increased pressure of atmospheric air, (Fig.1 and 2). To do this, turn on compressor 16, valve 35 must be open. At this point, increased air pressure is created in the annulus, under which the static level of the liquid in the well decreases, and the downhole substitution pump 4 of the lower stage is higher than the liquid level. In this case, the air entering one of the working chambers of the borehole replacement pump (Fig. 3) through the breather 38, the compressed gas channel 71, the air distributor 24 and through the channels 68 or 69, depending on the position of the air distributor 24, displaces the liquid from the working chamber 42 or 43, and the float valve 46 or 47 lowers and closes the seats 48 or 49, thereby preventing the leakage of compressed air into the pipeline of the produced fluid 6. The second working chamber at this time remains filled with fluid. The liquid in the pipeline 6 remains at the same level, since the pressure in it does not change and is equal to atmospheric.

With a multi-stage lift (Fig. 2), compressed air will also fill one of the working chambers of downhole replacement pumps of all stages. After filling the annulus of the well with compressed air, the downhole pumping unit is ready for operation.

When applying electric current through cable 8 to the borehole displacement pump 4, the installation starts to work.

Consider the operation of the installation for the production of non-carbonated liquid with a single-stage lifting of the liquid.

At the time of power supply to control the well pump substitution in the annulus is air under high pressure (figure 5), which is also located in the working chamber 42, and the other working chamber 43 is filled with liquid. The float valve 47, in the upper position, closes the seat 51 and thereby prevents liquid from entering the exhaust gas pipe 5, and the magnet built into it includes a reed switch 53. The pressure in the exhaust gas pipe 5 is atmospheric, since its upper end communicates with the atmosphere, this ensures unimpeded removal of exhaust gas through the bearing pipe 13 of the bearing flange 11.

When power is supplied via cable 8, the reed switch 53 gives a signal via wire 65 to control unit 70, which generates a command and transmits it via wire 63 to switch the air distributor 24. After switching the air distributor 24 (Fig. 6), compressed air starts to flow from the chamber 43 from annular space through the breather 38 through the channel 71 and 69 and displace the fluid into the pipe 6 through the seat 49, the discharge valve 57 and the channel 59. At the same time, compressed air is removed from the chamber 42 into the exhaust gas pipe 5 through channels 68 and 67 through Mon self-distributor 24, as a result of lowering the pressure, the fluid enters the chamber under pressure through the seat 48, valve 54 and through the receiving channel 58 from the intake pipe 7. When the process of displacing the liquid from the chamber 43 is completed, the float valve 47 closes the seat 49, preventing compressed air from leaking. At this time, when filling the chamber 42, the float valve 46, floating up, closes the seat 50, at the same time closing the reed switch 52, as a result of which the air distributor 24 switches. After switching the air distributor 24 (Fig. 7), compressed air enters the chamber 42 and displaces the liquid through the seat 48 and valve 56 into the discharge channel 59 and then into the pipe 6. At this time, compressed air is removed from the chamber 43 into the exhaust gas pipe 5, and liquid enters the chamber through the seat 49, valve 55 and through the channel 58 from the receiving pipe 7.obyvaemaya liquid via line 6 rises to the surface, and the exhaust air 5 goes into the atmosphere the exhaust gas conduit. The pressure in the annulus is maintained by the compressor 16 automatically.

Thus, by continuously alternating the reception and displacement cycles in the working chambers 42 and 43, the downhole displacement pump creates a continuous liquid flow in the pipeline 6 until the power supply to the installation is turned off. A well replacement pump for any stage in the production of non-carbonated liquid by a multi-stage installation is designed to receive fluid from the next lower and rise to the next upper one, and they begin to work only when it fills one of the working chambers, and until that moment they are in standby mode. The principle of operation of all borehole pumps for plant replacement in single-stage and multi-stage fluid lifting is the same.

The technical effect is the creation of a reliable and easily integrated into the existing system for producing water from wells, an easy-to-use and electrically safe method that allows producing non-carbonated liquid with mechanical impurities from shallow and deep depths, and from wells with a small debit, including through the method the production of still non-carbonated fluid by an installation based on borehole displacement pumps, including raising the fluid by pumps, while creating a continuous flow of fluid by alternating cycles of EMA and displacing working chambers interchangeable dual chamber substitution downhole pump connected by pipelines extracted liquid outlet of the exhaust gas and the power cable; for this, the pressure in the sealed annulus is increased, by which the static liquid level in it is reduced to a level lower than the placement of the lower stage of the downhole substitution pump, and due to the difference in the increased pressure in the annulus of the well, with the pressure in the exhaust pipe connected to the atmosphere, and from one of the working chambers of the pump of the lower stage of the installation, liquid is received, and all pumps are displaced from the other chamber through the pipeline of the produced liquid to the upper pumps with Upenu create due to receipt therein of pressurized gas from the annulus, the fluid intake pump working chambers arranged above provide fluid due to displacement of the working chambers located below the pump.

Claims

FORMULA

A method of producing reservoir non-girted fluid, including raising the fluid by pumps, characterized in that a continuous fluid flow is created by alternating the cycles of receiving and displacing the working chambers of interchangeable two-chamber borehole displacement pumps connected by pipelines of the produced fluid, exhaust gas discharge and power cable; for this, the pressure in the sealed annulus is increased, by which the static liquid level in it is reduced to a level lower than the placement of the lower stage of the downhole substitution pump, and due to the difference in the increased pressure in the annulus of the well, with the pressure in the exhaust gas pipe connected to the atmosphere, and from one of the working chambers of the pump of the lower stage of the installation, liquid is received, and all pumps are displaced from the other chamber through the pipeline of the produced liquid to the upper pumps tupeney create due to receipt therein of pressurized gas from the annulus, the fluid intake pump working chambers arranged above provide due to displacement of fluid from the working chambers, arranged below the pump.