RU2105146C1 - Jet-type hydraulic manipulator - Google Patents

Abstract

FIELD: oil and gas production industry. SUBSTANCE: this can be used for development of wells and intensification of oil and gas inflows and is aimed at increasing operating efficiency of hydraulic manipulator and widening of its performance potentialities. Jet-type hydraulic manipulator has hollow body 2, jet pump 3 installed inside body hollow, non-return valve 4, packer 26, lock 21, rod 10 with actuator, calibrated valve 17. Actuator is made in the form of chamber 12 with piston 11, inlet valves, and outlet valve. EFFECT: higher efficiency. 7 dwg

Description

 The invention relates to the oil and gas industry and can be used for well development and stimulation of oil and gas inflows.

 Known inkjet apparatus containing a discharge pipe, nozzle, and conical rod associated with the drive, made in the form of equalizing and power membrane mechanisms [1].

 The disadvantage of this apparatus is the limited use of it in the well, due to the cumbersome execution of the membrane drive mechanism and the complexity of controlling operating modes.

 The closest technical solution taken as a prototype is a device for inducing formation fluid inflow containing a hollow body with channels and connected to a pipe string, a jet pump installed in the body, a recording instrument unit, a check valve, a packer, a latch [2].

 The disadvantage of this device is the limited functionality due to the need to lift the pump during the treatment of the reservoir with reagents and replace the pump with an inventory valve when crimping the packer, as well as the low efficiency of the pump when the pressure of the working or reservoir fluid changes.

 The objective of the invention is to expand the functionality and increase the efficiency of the hydraulic manipulator.

 The solution to this problem is achieved by the fact that the jet hydraulic manipulator, comprising a hollow body with radial channels, connected to the pipe string, a plug-in jet pump with a block of recording devices installed in the body cavity, a check valve, a packer and a latch, is equipped with a drive shaft and a calibrated valve, the rod is located in the cavity of the jet pump with the possibility of overlapping the nozzle, and the drive is made in the form of a chamber, with a spring-loaded piston placed in it, and equipped with an upper and lower inlet valves and an exhaust valve, the upper inlet valve being located above the actuator piston and connected to the annular space through a channel made in the hydraulic manipulator body, the lower inlet valve is located above the piston and connected to the check valve chamber, the exhaust valve is located between the piston and the lower inlet valve and hydraulically connected to the annular cavity of the pump nozzle, and a calibrated valve is located under the check valve in the channel connecting the body cavity with the under-packer space m

 The essence of the inventive jet hydraulic manipulator is that the upper valve of the shaft drive chamber is made, for example, in the form of a spool device with a hydraulic accumulator drive, which processes when pressure decreases, in this case, after pressure testing of the packer, without lifting the pump, as a result, the drive chamber is hydraulically connected to annular space, the lower inlet and outlet valves of the shaft drive chamber are located below the spring-loaded piston, this arrangement forms a piston pump for pumping formation fluid into the annular cavity of the jet pump nozzle during its operation, a calibrated valve is located under the non-return valve and is designed to pump reagents for treating the bottomhole formation zone without raising the jet pump.

 In FIG. 1 and 2 depict an inkjet hydraulic manipulator, a general view, a section, and FIG. 3 is a section AA in FIG. 1, in FIG. 4 is a section BB in FIG. 1, in FIG. 5, 6 and 7 are the basic schemes of operation of the hydraulic manipulator.

 An inkjet hydraulic manipulator (Figs. 1 and 2) is installed on tubing 1 and includes a housing 2, an inkjet pump 3 and a check valve 4.

 The housing 2 has a hollow structure, in the body of which there are channels B, G, D, E, F, Z, K, L and an annular cavity M.

 The jet pump 3 includes a sleeve 5 with a block 6 of recording devices, to which a cable lug 7 with a load-carrying logging cable 8, a window H, a nozzle 9, a rod 10, a piston 11 located in the chamber 12, a spring 13, inlet valves 14 and 15, exhaust valve 16, calibrated valve 17, displacement chamber 18, diffuser 19.

 To fit the jet pump 3 in the housing 2 there is a seat slot 0, and the tightness is provided by seals 20.

 The jet pump 3 is held in the housing 2 by means of latches 21, which engage with the recess P, and the removal from the stops is carried out using rods 22. The check valve 4 includes a rod 23, a sleeve 24 for connecting measuring instruments (pressure gauge, thermometer, flow meter and etc.) at the same time, there are openings P on the check valve body 4, and channel C at the sleeve, which serves to equalize the pressure in the sub-packer and over-packer zones when the jet pump 3 is lifted from the well.

 In FIG. 5 shows production casing 25, packer 26, spool valve 27, upper 28 and lower 29 of valve cavity 14, return spring 30.

 Work of a jet hydraulic manipulator.

 The housing 2 together with the jet pump 3 is lowered into the production casing 25 (Fig. 5), on the tubing 1 together with the packer 26 and installed at the calculated depth. After separation of the annular space by the packer 26, the tightness of the packer 26 and the tubing string 1 is checked by pressure testing 1.5 times the calculated operating pressure, while valve 14 and nozzle 9 are locked.

 After crimping the packer 26 and tubing 1, the pressure in the annulus decreases to the calculated working (Fig. 6), while the spool valve 27, the actuator of the valve 24, closes as a result of the pressure difference in the upper 28 and lower 29 cavities, the valve 14 opens, the working fluid enters through the channel G into the chamber 12, the piston 11, moving downward, moves the rod 10, opening the nozzle 9 for the passage of the working fluid flowing through the radial channels B, through the mixing chamber 18, diffuser 19, window H, channels D into the inner cavity of the tubing 1 Emerging at a high speed from the nozzle 9, the fluid ejects formation fluid from the sub-packer zone, which through the channels G and the annular cavity M of the housing 2 enters the mixing chamber 18, where the working and ejected liquids are mixed, but often gas is released from the ejected fluid, which entering the annular cavity M reduces the efficiency of the jet pump 3 due to hydraulic fracturing of the column of formation fluid.

 In order to displace and prevent gas evolution, formation fluid enters the annular cavity M through the channel "3" from the chamber 12.

 The working fluid is supplied to the well in a pulsating mode, due to this, the piston 11 reciprocates in the chamber 12, while the reservoir fluid from the check valve chamber 4 through the valve 15 enters the channel K into the chamber 12, from where it exits through the valve 16 and flows through channel "3" into the annular cavity M, in order to additionally replenish this cavity with formation fluid to prevent rupture of the working and ejected liquids, as well as to increase the efficiency of the jet hydraulic manipulator.

 When the jet pump 3 is operating, the check valve 4 is in the upper position, the liquid through the gap formed between the valve k and the housing 2 enters the annular cavity M. When the pump units stop working, the valve 4, by the action of the return spring 30, returns to its original position, sealing under-packer zone (Fig. 7). The pressure in the sub-packer zone is restored due to the inflow from the reservoir. This change in pressure along the channel E in the body of the body 2 is transmitted to the pressure transducer of the block 6 of the recording devices, while the signal via cable 8 (Fig. 1) is transmitted to the logging station’s photographic recorder (not shown).

 To intensify the oil and gas inflows, it is necessary to treat the bottom-hole zone of the formation with chemical reagents (Fig. 7), for this, the supply of working fluid is stopped, while the rod 10, under the action of the spring 13, closes the nozzle 9 of the pump 3. The chemical injected into the well feeds through the tubing 1 at a selling pressure exceeding reservoir pressure by 1.0 - 1.5 MPa. The calibrated valve 17 is activated at a pressure equal to the sales.

 At the end of the work in the well, give a stretch of the logging cable, while the cable rods 22 remove the clamps 21 from the stop. The jet pump 3 starts to rise and the stem 23 of the check valve 4 also rises and connects the channels C to the holes P, the packer and subpacker zones are communicated, the pressure is equalized in them and the jet pump 3 rises to the surface.

The use of the proposed jet hydraulic manipulator in comparison with the prototype can reduce the time for well development and intensification of oil and gas inflows by eliminating tripping:
- when crimping the packer 26 and tubing 1,
- when treating the bottom-hole formation zone with chemicals, and also increase the efficiency of the jet pump 3 by pumping formation fluid into the annular cavity M.

An inkjet hydraulic manipulator was tested at the Ermakovskoye field in production well N 175 bush 186 during the development and intensification of oil and gas inflows of the productive formation A $\genfrac{}{}{0ex}{}{\text{2}}{\text{2}}$ lying in the interval 1902-1910 m. During well development, the total time of the work cycle, including the descent and pressure testing of equipment, cleaning the bottom-hole zone from fluids, including clay-acid treatment of the formation, was 8 days.

 At the well during development and cleaning using jet devices similar to the prototype, the full cycle of work until the well is put into operation is 10 days.

 A positive effect from the use of the inventive jet hydraulic manipulator is achieved by reducing the time of well development, increasing efficiency and expanding functionality.

Claims (1)

 An inkjet hydraulic manipulator comprising a hollow body with radial channels connected to a pipe string, a plug-in jet pump installed in a body cavity with a recording instrument unit, a check valve, a packer and a latch, characterized in that it is equipped with a drive shaft and a calibrated valve, the rod is located in the cavity of the jet pump with the possibility of overlapping the nozzle, and the actuator is made in the form of a chamber with a spring-loaded piston placed in it and equipped with upper and lower inlet valves and exhaust m valve, and the upper inlet valve is located above the actuator piston and is connected to the annular space through a channel made in the hydraulic manipulator body, the lower inlet valve is located under the piston and connected to the check valve chamber, the exhaust valve is located between the piston and the lower inlet valve and is hydraulically connected with an annular cavity of the pump nozzle, and a calibrated valve is located under the check valve in the channel connecting the body cavity with the under-packer space.

Images