RU34628U1 - Installation for pumping fluid into the reservoir - Google Patents

Abstract

Installation for pumping fluid into the formation, including an injection well with wellhead shutoff valves, a submersible pump with an electric motor, a string of tubing with a compensator and a device for measuring pressure from the discharge of a submersible pump and a packer installed above the formation, characterized in that the compensator is made in in the form of a downhole pressure stabilizer, and a device for measuring pressure from a submersible pump discharge - in the form of an electronic sensor connected by a cable to a data recording device.

Description

OBJECT - DEVICE

LIQUID INJECTION INSTALLATION

The proposal relates to the field of oil and gas industry, in particular to pumping units for pumping fluid into the reservoir.

The well-known "Installation for injecting fluid into the reservoir (patent RU No. 2163661, IPC ЕВВ 43/20, 21/00, F04B 47/00, publ. BI No. 6 of 02.27.2001), including an injection well, a submersible pump with an electric motor, a packer installed above the reservoir, a tubing string (tubing), which has a detachable movable connection at the top to relieve variable axial loads on the packer.

The disadvantage of this device is that the detachable connection does not exclude lateral loads on the bjt column and the packer caused by pressure pulsation on the discharge of the submersible pump. In addition, there is no control over the pressure on the pump side, as a result, the exit from the mode of pumping fluid into the formation and the loss of tightness of the tubing are not controlled.

The closest in technical essence and the achieved result is “Pumping unit for pumping water into an injection well (Patent RU No. 2132455 Е21 В 43/00, 43/20, F 04 В 47/00, publ. 06/27/1999), consisting of pump -compressor pipes (tubing), wellhead shutoff valves, nozzle, submersible electric motor and pump, linear load compensator, where the pressure measurement from the pump discharge is carried out by a device consisting of a pulse tube and pressure gauge mounted on the surface of the wellhead shutoff valves.

The disadvantage of this device is also the exclusion of lateral loads on the tubing and the packer, leading to their premature destruction and loss of their tightness. The disadvantage is the low accuracy of the pressure measurement on the pump outflow due to pressure pulsation and

, 2003125412

IPC 7 Е21В 43/00, 43/20

due to clogging of the impulse tube with oil and solid suspended particles contained in the injected fluid. In addition, there is a high probability of collapse of the impulse tube during hoisting operations.

The technical task of the proposed utility model is to increase the accuracy of measurement, reliability and durability, due to the exclusion of impulse effects on the bjt column and the use of measuring equipment is independent of it; from external influences.

The technical problem is solved by the proposed installation for pumping fluid into the formation, including an injection well with wellhead shutoff valves, a submersible pump with an electric motor, a string of pump and compressor pipes with a compensator and a device for measuring pressure from the discharge of a submersible pump, and a packer installed above the formation.

What is new is that the compensator is made in the form of a downhole pressure stabilizer, and the device for measuring pressure from the submersible pump discharge is in the form of an electronic sensor connected by a cable to the data recording device.

An analysis of the known similar solutions allows us to conclude that there are no signs similar to the distinctive features in the claimed device, that is, the compliance of the proposed solution with the criteria of "novelty and" industrial applicability.

In FIG. The basic technological scheme of the installation for pumping fluid into the reservoir is presented.

The installation for injecting fluid into the formation includes an injection well 1 with wellhead shutoff valves 2, a submersible pump 3 with an electric motor 4, a string of tubing 5 with a compensator 6 and a device for measuring pressure 7 from the discharge of the submersible pump 3, and a packer 8 installed above reservoir 9. In this case, the compensator 6 is made in the form of a downhole pressure stabilizer, and a device for measuring

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pressure 7 from a submersible pump discharge - in the form of an electronic sensor connected by a cable 10 to a data recording device 11.

Installation for pumping fluid into the reservoir works as follows:

The fluid through the pipe (not shown) through the wellhead shutoff valve 2 enters the intake of the submersible pump 3. Having acquired the pressure necessary for injection, the fluid enters the reservoir 9 through the check valve 12, through the compensator 6, eliminating the pulse effects on the tubing pipes 5. The output of the compensator 6 is connected by means of a pipe 13 to a device for measuring pressure from the discharge of a submersible pump 3. I use t packer 8.

The compensator 6, made in the form of a downhole pressure stabilizer, comprises a cylindrical body 14, inside which a perforated tube 15 and elastic damping elements 16 are axially placed.

A device for measuring pressure 7 contains a pressure transducer 17 (electronic sensor), the inlet end of which is screwed into the lower sleeve (pressure take-off point). The electronic pressure sensor is enclosed in a casing 18 (mandrel) that protects the sensor housing from excessive pressure. A cable head 19 is fixed to the output end of the sensor through the sealing elements, through which an armored two-wire geophysical cable 10 passes. An electrical signal from the sensor’s output is sent via cable to the secondary device 11 of the control station of the pumping unit 20, located at the wellhead, where the secondary screen is also converted Instrument 11 displays a digital indication of the measured pressure.

The use of this device for measuring pressure on the pump side and a downhole stabilizer to protect the tubing string from pressure pulsation improves the accuracy of measuring the pressure injected

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liquid And increase the service life of the tubing string and packer sealing elements by 25% -30% by reducing the pulsation of the liquid pressure, reduce downtime of the pump installation by 20% -25% by reducing the number of shutdowns due to the operation of technological protection against unacceptable pressures, and reduce costs for servicing instrumentation 4 times.

Claims (1)

Installation for pumping fluid into the formation, including an injection well with wellhead shutoff valves, a submersible pump with an electric motor, a string of tubing with a compensator and a device for measuring pressure from the discharge of a submersible pump and a packer installed above the formation, characterized in that the compensator is made in in the form of a downhole pressure stabilizer, and a device for measuring pressure from a submersible pump discharge - in the form of an electronic sensor connected by a cable to a data recording device.