RU2489599C1 - Gassy and non-gassy liquid production plant - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: plant includes working cylinders 6, pistons 8 and tubing string 4. Working cylinders 6 are fixed between joints of the tubing through a certain distance depending on design working pressure in the tubing. Pistons 8 are attached to chain 7 throughout the length movably looped through sealed chain drive 17, with lifting 22, lowering 23 and tension 24 pulleys, guide pipeline 12, receiving filtering chamber 10, through guide pulley 9, through working cylinders 6 and tubing string 4 attached through the guide pipeline between each other and tightly connected to load-carrying flange 14 of a borehole pump. Continuous lifting of liquid is performed from high and low depths, with large content of associated gas from low flow rate wells, including due to constant movement speed of the chain with pistons through the working cylinders, the length of which is more than distance between the pistons, which provides presence of at least one piston in the working cylinder at any period of time.

EFFECT: enhanced operating reliability.

4 cl, 5 dwg

Description

Installation for the production of carbonated and non-carbonated liquids refers to technical means for lifting liquids, can be used in any business sector for lifting water, oil from boreholes.

A known installation for lifting water from an artesian well according to patent 20137 dated 2001.02.19, published 2001.10.20, IPC F03B 13/06, including a well pump kinematically connected to a ground drive, tubing and wellhead equipment, is used as a well pump a long-stroke plunger pump with floating segments, the plunger of which is connected to a ground drive through a weighting pad, shock absorber, flexible steel tape and pulley, and the pulley is also connected using a flexible steel tape with a counterweight installed pits vertically fixed casing. The pulley is made of two grooves, in one of which is a flexible steel tape connecting the pulley to the pump plunger, and in the other a flexible steel tape connecting the pulley to the counterweight, the tapes being wound on the pulley in opposite directions. As a drive, a reversible motor with a reduction gear and a centrifugal clutch on the output shaft was used. The apparatus is equipped with a pump plunger position sensor containing a magnetic tag reader mounted on a flexible steel tape, spaced apart from each other by a distance equal to the size of the plunger stroke, the reader having a reed switch, the contacts of which are electrically connected to the reversing motor control circuit.

This installation can only be used when lifting water from shallow depths. It is difficult to install, since it is necessary to additionally prepare a pit. The presence of a reversible motor in the drive of the installation leads to a complication in the electrical control circuit, and during operation, to a complication of maintenance. Water supply occurs cyclically, this, of course, affects the performance of the installation.

The closest technical solution is a sucker rod pumping unit (SHSNU) (Oil production reference book. Authors: VV Andreev, K.R. Urazakov, V.U. Dalimov and others; Edited by K.R. Urazakov, M. LLC Nedra-Business Center, 2000, chapter 2).

A sucker rod pumping unit (SHSNU) contains a pumping unit, a rod string, a working cylinder, a piston and a tubing string.

Cyclic multidirectional loads arising during the operation of SHSNU lead to frequent breakdowns of the rods, therefore it is necessary to carry out frequent repairs, as well as quite stringent requirements for tubing used in the extraction of sucker rod pumps, make the production and operation of SHSNU expensive. SHGN has rather stringent requirements for the content of free gas (up to 25%). The strength of the rods and their deformations limit the depth of the SHGN application to 3200 m. The supply of the produced SHSNU fluid is carried out cyclically due to the operation of the SHGN in the reciprocating motion mode, as a result, the installation performance decreases.

The objective of the proposed technical solution is the production of carbonated and non-carbonated liquids with the lowest energy costs, with high reliability and electrical safety of equipment and low costs in the manufacture, operation and repair, in any sectors of economic activity.

The problem is solved by the installation for the production of carbonated and non-carbonated liquids containing a working cylinder, piston and tubing string, while several working cylinders are tightly secured between the joints of the tubing, over a certain distance, depending on the calculated working pressure in the pump -compressor pipes; pistons are attached to the chain along its entire length, movably looped through the sealed ones, the chain drive with lifting, lowering and tensioning pulleys, a guide pipe, a filter intake chamber, through a guide pulley, through working cylinders and a tubing string connected to a guide pipe between each other, and hermetically attached to the bearing flange of the well pump; the length of the working cylinders is greater than the distance between the pistons on the chain; it is equipped with openings for venting associated gas located in the tubing above the lower level of the working cylinders, but below the junction of their connection; the number of working cylinders, depending on the height at which it is necessary to raise the liquid, is determined by the formula: n = H / h, where n is the number of working cylinders, N is the height at which it is necessary to raise the liquid, h is the step with which the workers are mounted cylinders.

The technical effect is the continuous lifting of liquid from large and shallow depths of non-carbonated and carbonated liquids, with a high content of associated gas, from wells with low debit, including due to the constant speed of the chain with pistons through the working cylinders, the length of which is greater than the distance between the pistons, which ensures that at least one piston is in the working cylinder at any time, and this prevents the liquid from flowing from the tubing string back down; associated gas is removed into the annulus due to the location of the holes above the lower level of the working cylinders, but below the junction of their fastening. holes

Installation for the production of carbonated and non-carbonated liquids, shown in the drawings, where Fig. 1 is a single-stage version, Fig. 2 is a multi-stage version, Fig. 3 is a chain plunger pump, Figs. 4, 5 are the principle of operation of the pump.

Figure 1, 2, 3. 4, 5 shows: casing 1 of the well, perforations 2 of the casing, produced fluid 3, column 4 of tubing, tubing 5, working cylinders 6, chain 7, working pistons 8, a guiding pulley 9, a receiving and filtering chamber 10, filter holes 11 of the housing, a guiding pipe 12 for a chain with working pistons, a hole 13 for venting associated gas, a bearing flange 14 of the well pump, an upper receiving chamber 15, a nozzle 16 for venting produced fluid, the drive circuit 17 of the downhole pump, bracket 18 for connecting the guide pipe to the tubing string, casing flange 19, gasket 20, upper casing 21, lifting pulley 22, lowering pulley 23, tension pulley 24, pipe 25 for receiving and filtering chamber, pipe 26 for venting associated gases.

Installation for the production of carbonated and non-carbonated liquid is as follows.

Installation for the production of carbonated and non-carbonated liquid can be with one working cylinder 6, single-stage (Fig. 1), or with several interchangeable working cylinders 6, located above the lower one above the other, through the estimated distance, multi-stage (Fig. 2).

To the receiving and filtering chamber 10, which is simultaneously the housing of the guide pulley 9, with the coupling 5, through the pipe 25, a column 4 of tubing is connected, into the joint of which a working cylinder 6 is inserted.

A guide pipe 12 is connected to another nozzle (not shown) of the receiving and filtering chamber 10. The tubing string 4 and the guide pipe 12 are fastened together by brackets 18, and are tightly connected to the bearing flange 14 of the well pump.

The drive of the chain 17 with the lifting 22, the lowering 23 and the tension 24 pulleys, through which the looped chain 7 with the pistons 8 passes, which also passes inside the guide pipe 12, the receiving-filter chamber 10, through the guide pulley 9, is hermetically mounted on top of the upper case 21, in the working cylinder 6 and the tubing string.

Since the descending branch of the chain with the pistons of the installation balances the ascending one, energy is required only for raising the liquid and overcoming friction, and this leads to significant energy savings.

Due to the fact that the speed of the chain with the pistons, the constant rise of the fluid occurs continuously.

With the same diameter of the working cylinders of this installation and SHSNU, the performance of the proposed installation is twice as high.

In the proposed installation, there are no valves, and valves, as you know, are a weak link in any pump.

When installing the installation for the production of carbonated or non-carbonated liquid with one working cylinder (figure 1), the connection and start-up are as follows:

- the nozzle of the receiving and filtering chamber 25 is hermetically connected to the tubing string 4 by means of a coupling 5, having previously inserted a working cylinder 6 at the joint;

- gradually increasing the tubing string 4 and attaching the guide pipe 12 to it, while simultaneously pulling through them and through the guide pulley 9, chain 7 with pistons 8, lower the submersible part of the pump into the casing 1 of the well until the receiving and filter chamber 10 is submerged below the static level produced fluid 3,

- the submersible part of the pump installation is suspended in the casing 1, hermetically securing to the flange of the casing 19, the bearing flange 14 of the well pump, to which the tubing string 4 is attached (Figs. 1, 2);

- the drive of the chain 17 is hermetically installed on the upper case 21, after which the chain 7 is pulled through, the lifting 22, and lowering 23, the pulleys and connect the free ends of the chain 7 with a connecting link (not shown in the drawing), thereby looping it, after which it pull the tension pulley 24.

Installation with one working cylinder 6 is used when the produced fluid must be raised from a shallow depth (figure 1).

When the produced fluid must be raised from great depths, apply the installation with several interchangeable working cylinders 6 (figure 2)

When installing a pumping unit with several working cylinders 6, after a certain distance between the joints of the tubing, the working cylinders 6 are hermetically fixed, and the distance between them depends on the calculated working pressure in the tubing pipes (Fig. 3).

When installing the installation for the production of carbonated and non-carbonated liquids from great depths (Fig. 2), all connections are made in the same sequence, with the only difference being that after installing one working cylinder above it, over the estimated distance, they are mounted one above the other working cylinders, the number of which, depending on the height by which it is necessary to raise the liquid, is determined by the formula:

n = H / h

where n is the number of working cylinders

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

h - step with which the working cylinders are mounted

Installation for the production of carbonated and non-carbonated liquid works as follows.

The installation carries out the lifting of the liquid with one working cylinder 6 in one step, or several, in several stages. The lifting of the liquid is carried out in all stages, by continuously moving inside the tubing string 4, the looped chain 7 and pistons 8 located on it through a certain distance, during the passage of which, through the interchangeable cylinders 6 installed at the joints of the tubing, the fluid is transferred in portions from the lower tubing to the upper. The chain 7 with pistons is lowered into the well through a guide pipe 12 attached to the tubing string 4 by brackets 18. To transmit the movement of chain 7, a drive 17 is located on the surface. The maximum pressure that can reach in the tubing depends on the distance through which the cylinders 6 are located and can vary over a wide range. The descending branch of the looped chain 7 in the static state of the installation balances the lifting branch, thereby ensuring the minimum expenditure of energy, which is necessary only for lifting the produced fluid 3 and overcoming friction.

The installation ready for operation is started, for which purpose the torque is supplied from the drive in the direction indicated by the arrows on the lifting 22 and lowering pulleys 23 which are synchronized with each other (Fig. 1 and Fig. 2).

As a drive, to create torque in the installation, electric motors or internal combustion engines or other known engines can be used.

Chain 7 simultaneously begins to move along the guide pipe 12 downward and along the tubing string 4 upward, passing through the working cylinder 6 into which it is guided by a pulley 9. Passing along the working cylinder 6 located in the pipe 25 of the receiving and filtering chamber 10, pistons 8 transfer the liquid in 3 portions to the tubing string 4 (FIG. 3). This is due to the fact that the working length of the working cylinders 6 is greater than the distance between the pistons 8 on the chain, which ensures that at least one piston is in the working cylinder (Figs. 4 and 5) ???, and this prevents the flow of fluid from the tubing string 4 back down. On the tubing string 4, the fluid rises to the upper receiving chamber 15, from where it is removed by the pipe 16 as intended.

In a pump installation with several working cylinders (Fig. 2), when the liquid reaches the lower level of the subsequent working cylinder 6, it is also transferred in portions up the tubing string 4, and is similarly repeated in the remaining working cylinders (Figs. 4 and 5).

To remove associated gas released from the liquid during the production of carbonated liquid in the pumping unit with several working cylinders, holes 13 for associated gas removal are provided, which are located in the tubing pipes above the lower level of the working cylinders 6, but below the junction of their connection.

For the removal of associated gases from the sealed cavity of the pump there is a pipe 26.

The working cylinders 6 are the same and interchangeable. The pistons 8 are identical and interchangeable.

To replace a spent chain with pistons, it is enough to open the hatch (not shown in the drawing) in the chain drive housing, disconnect the chain link, and connect a new one to the descending end of the old chain with pistons. Turn on the chain drive and wind the rising end onto a pre-prepared bobbin until a connecting link appears, then disconnecting it from the old chain, connecting the lowering and rising ends of the new chain, looping it round, securing the tension pulley and closing the hatch, after which the installation is ready for operation.

Due to the fact that the speed of the chain with the pistons, the constant rise of the fluid occurs continuously.

In the proposed installation, there are no valves, and valves, as you know, are a weak link in any pump.

With the same diameter of the working cylinders of this installation and SHSNU, the performance of the proposed installation is two times higher.

The proposed pump installation, easy to manufacture and maintain, reliable and economical in operation, with minimal energy consumption, easily integrated into the existing oil and water production system, electrically safe, with a maximum working pressure of not more than 1.0 MPa, allows production from large and small depths of carbonated and non-carbonated liquids with a high content of associated gas from wells with low debit, including.

Claims (4)

1. Installation for the production of carbonated and non-carbonated liquids, containing a working cylinder, piston and tubing string, characterized in that several working cylinders are secured between the joints of the tubing tightly through a certain distance, depending on the calculated working pressure in the tubing pipes; pistons are attached to the chain along its entire length, movably looped through a sealed chain drive with a lifting, lowering and tensioning pulleys, a guide pipe, a receiving and filtering chamber, through a guide pulley, through working cylinders and a tubing string connected to the guide pipe between by itself, and tightly attached to the bearing flange of the well pump. 2. Installation according to claim 1, characterized in that the length of the working cylinders is greater than the distance between the pistons on the chain. 3. Installation according to claim 1, characterized in that it is provided with openings for venting associated gas located in the tubing, above the lower level of the working cylinders, but below the junction of their connection. 4. Installation according to claim 1, characterized in that the number of working cylinders, depending on the height by which it is necessary to raise the liquid, is determined by the formula:
n = H / h,
where n is the number of working cylinders;
H is the height to which the liquid must be raised;
h is the step with which the working cylinders are mounted.

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