RU2654301C1 - Bypass system of pumping unit - Google Patents

Abstract

FIELD: oil and gas industry; mining.

SUBSTANCE: invention relates to oil submersible equipment and can be used to lift a borehole fluid and measure well parameters without extracting the pumping unit. Bypass system contains a Y-block with a plug. To the first output of the block, a string of bypass pipes is suspended through a branch pipe, a connector and a cutoff clutch; to the second – a pumping unit containing an electric motor with a support branch pipe is connected through a branch pipe, a cutoff clutch and a balancing valve. Bypass pipe string and pumping unit are interconnected by protictolizers and a seat fixing the support branch pipe. Connector is made telescopic and equipped with a locking element in two directions. On the top of the Y-block there is a landing nipple, intended for installation of a pressure test plug or an insulating sleeve. Bypass pipes along the whole pumping unit are made solid and connected by a gas-tight inserted joint.

EFFECT: invention is aimed at improving the reliability and safety of operation of the pumping unit, including through the possibility of carrying out pressure testing of pipes, at increasing the load-carrying capacity of the bypass system, as well as at ensuring the possibility of the free-flow oil production method.

1 cl, 4 dwg

Description

The invention relates to oil-immersion equipment and can be used to raise well fluid, measure well parameters without removing a pumping unit and holding heavy assemblies (downhole equipment (ВСО), or other assemblies, such as a perforator, to increase the impact on the formation), and also with the fountain method of oil production and during pressure testing of tubing (tubing).

The known bypass system of the pumping unit [patent No. 2449117 RU, C1, published 04/27/2012, bull. No. 12], consisting of a Y-unit, to which the pump unit and the bypass column with a funnel, a swivel are attached, while the bypass pipe string is connected to the Y-block by means of a burst sleeve and attached to the pump string by means of protectors with the possibility of their separation and saddles with the possibility of separation, moreover, a plug is installed in the Y-block, and the pump string contains a balancing valve.

Known bypass system of a downhole pumping unit for simultaneous and separate operation of a well having at least two layers [patent No. 2495280, RU, C1, published 10.10.2013, bull. No. 28], consisting of a Y-shaped block mounted on a pipe string, to the bottom of which a pump unit and a bypass pipe string with a landing nipple are connected in parallel to install a removable blind plug in a nipple in a Y-shaped block above the bypass pipe string, the latter is fixed to pump installation using clamps, the landing nipple is made with the possibility of installing a geophysical plug in it instead of a removable blind plug.

A common drawback of the described installations is the inability to conduct oil production in a fountain way, as well as the lack of reliability and safety in operation.

A known bypass system of the pumping unit (patent No. 2520556 RU, C2, published 06/27/2014, bull. No. 18), containing a Y-block with a plug, a column of bypass pipes is suspended to a single outlet by a pipe, connector and a burst sleeve, and to the second a pumping unit is connected to the outlet through the nozzle, the burst sleeve, and the balancing valve, including a submersible motor equipped with a nozzle, while the bypass pipe string and the pumping unit are fastened together by protectors and a saddle. The connector is made in the form of two symmetrical detachable parts with a longitudinal semi-cylindrical and prismatic recess, hinged along the free edges and screws between the recesses with the possibility of fastening the bypass pipe string to the pump unit.

The use of a connector, weakened by fastening its parts with screws, and the presence of perforations on the bypass pipe along the submersible motor of the pumping unit reduce the load-bearing capacity of the equipment, which does not allow you to suspend heavy nodes and produce oil in a fountain way.

Another disadvantage of this system is the inability to conduct pressure testing of the tubing, which reduces the reliability and safety of operation of the pump unit.

Installation according to the patent RU 2520556 is the closest in technical essence to the claimed and adopted as a prototype.

The present invention is aimed at improving the reliability and safety of the operation of the pumping unit, including through the possibility of crimping the tubing, to increase the carrying capacity of the bypass system, as well as to provide the possibility of a fountain method of oil production.

The specified technical result is achieved due to the fact that in the bypass system of the pump installation, consisting of a Y-block with a plug, a column of bypass pipes is suspended to one output of it by means of a pipe, connector, burst sleeve, and to the second output through a pipe, a burst sleeve and balancing the valve is connected to a pump installation containing an electric motor with a support pipe, while the bypass pipe string and the pump installation are fastened together by protectors and a saddle fixing the support pipe k, according to the invention, the connector is made telescopic and provided with a locking element in two directions, on top of the Y-block there is a landing pipe with the possibility of placing a crimping plug in it for crimping the tubing or an insulating sleeve that provides oil production in a fountain way, while bypass pipes along the entire the pumping unit is made continuous and connected by means of a sleeveless gas-tight connection.

A telescopic connector with a bi-directional locking element provides an adjustment length of up to 500 mm and allows you to suspend heavy assemblies on bypass pipes, as well as pump liquid under pressure with a fountain method of oil production.

The use of a sleeveless gas-tight connection protects the pump unit from damage, and the absence of perforation in the bypass pipes along the submersible motor increases their load-carrying capacity.

The presence of the landing pipe above the Y-block allows the installation of the crimping tube to conduct pressure testing of the tubing, and the ability to install an insulating sleeve in the landing pipe provides an implementation of the fountain method of pumping fluid. Installing a crimping plug and isolating sleeves increases the reliability and performance of the installation.

The invention is illustrated by drawings, where in FIG. 1 shows a General view of the proposed bypass system of the pumping unit, in FIG. 2 is a cross-sectional view of a connector; FIG. 3 - landing pipe with an insulating sleeve, in FIG. 4 - landing pipe with crimping plug.

The bypass system of the pump unit (Fig. 1) contains a Y-block 1 with the lower nozzles 2 and 3, in which a plug is installed (not shown). A bypass line 6 is attached to the pipe 2 through the connector 4 with the bursting sleeve 5, the pipes of which are connected using a sleeveless gas-tight threaded connection, which, in turn, increases the load-carrying capacity of the installation and allows oil production in a fountain way, and to the pipe 3 through the bursting the coupling 7 and the balancing valve 8 is connected to the pumping unit 9, in the lower part of which is an electric motor 10 connected to the seat 11 by means of the support pipe 12. The height of the bypass pipe string 6 and the pumping unit 9 Protectolizers 13 are placed, connecting them together. In the upper exit 14 of the Y-block 1, a landing pipe 15 is screwed in, which is a pipe in which seats are made for installing an insulating sleeve and a crimping plug (Fig. 3, 4).

The connector 4 (Fig. 2) includes a housing 17 located inside it with the possibility of extension of the adjustable rod 18, a thrust nut 19, wound on the housing 17 and an adjustable rod 18, and a stop 20 mounted between the end of the housing 17 and the inner end of the nut of the thrust 19. The stop 20 and the thrust nut 19 rigidly fix the position of the adjustable rod 18 extended by a predetermined distance and serve as elements for blocking its axial movement in two directions. In the upper part, adjustable rings 18 are fitted with elastic rings 21, which ensure the tightness of its contact with the inner surface of the housing 17, which is especially important with the fountain method of oil production.

Installation of the system is carried out by phased assembly. First, a saddle 11 with a support pipe 12 and a bypass pipe 6 installed below the saddle 11 is lowered into the well on a clamp-elevator (not shown), while a heavy load, such as a packer, inhibitor injection valve, or other BCO or suspension, can be suspended from bypass pipe 6 device. Then, a motor 10 is connected to the pipe 12 with a bypass pipe installed in parallel. After that, a hydraulic protection, a receiving device, a pump (not shown) and bypass pipes 6 connected in parallel to them by means of protectors 13 are sequentially connected to the electric motor 6. At the end of the assembled pump unit 9, a balancing valve 8 is mounted, and a burst sleeve 5 is connected to the column of bypass pipes 6. At the elevator clamp (not shown), the Y-block 1 is supplied, to which the connector 4 is screwed through the pipe 2, and the burst sleeve 7 is screwed to the pipe 3. Then, the burst sleeve 7 is connected to the balancing valve 8, t thereby providing a connection with the pumping unit 9, and for connecting the bypass pipe string 6, the connector 4 is connected to the burst sleeve 5 located on the bypass pipe string 6, while the stop 20 with nut 19 are previously unscrewed and the adjustable stem 18 is extended to the required the length with subsequent fixing of its position when tightening the stop 20 and nut 19. After mounting the Y-block 1, the landing pipe 15 is screwed to the upper exit 14. The installation is completed by attaching the tubing string 16 to the landing pipe 15.

The column of bypass pipes 6 has a sleeveless gas-tight threaded connection, which, combined with the absence of perforation on the pipes, allows you to use them as load-bearing and suspend heavy units and equipment (ВСО or other units), as well as raise the surface of the liquid with a fountain production method. In addition, the couplingless coupling used provides the maximum flow area inside the bypass line for lowering geophysical instruments or other measuring devices.

Due to the telescopic design of the connector 4, the carrying capacity of the proposed system is significantly increased, and it is also possible to conduct oil production in a fountain way.

When fountain production method in the landing pipe 15 is installed an insulating sleeve 22, while its lower part overlaps the pipe 2 (Fig. 3). For crimping the tubing string into the landing pipe 15, a crimping tube 23 can be placed (Fig. 4). Thanks to additional features, the reliability and safety of operation of the pumping unit 9 are increased.

The system operates as follows.

When the submersible motor 10 is turned on, the liquid from the reservoir (not shown) rises and enters through the receiving device (not shown) of the pumping unit 9 into the pump (not shown), the balancing valve 8 passes in succession, the burst sleeve 7 and is fed through the pipe 3 to Y -block 1, from where the liquid through the landing pipe 15 through the tubing string 16 is directed to the surface.

If it is necessary to remove the plug plug (not shown) from the Y-block 1, for example, when measuring the well parameters, the electric motor 10 of the pumping unit 9 is turned off, and the liquid from the tubing string 16 is discharged through the balancing valve 8 into the annulus. After that, the plug plug is removed from the Y-block 1 using a lifting tool and a through channel opens into the bypass pipe string 6. A logging plug (not shown) is lowered along the tubing string 16, which remains in the Y-block 1 to prevent overflow into the string bypass pipes 6 when starting the pumping unit 9, and a geophysical instrument, or other measuring device, which, passing through the column of bypass pipes 6, falls into the area below the pumping unit 9. Tool for tripping and logging tube can be lowered on logging cable, rope, wire or a continuous coiled tubing in a flexible tube (CT).

Then, by starting the electric motor 10, the pumping unit 9 is put into operation and well surveys are carried out. Upon completion of the studies, the electric motor 10 is turned off, the fluid from the tubing 16 is drained through the balancing valve 8 into the annulus, and the logging plug with a geophysical instrument or other measuring device is removed to the surface. Before the next start-up of the pumping unit 9, a plug plug (not shown) is again installed in the Y-block 1 with the help of a lifting tool.

In the fountain production method, a plug plug (not shown) is removed from the Y-block 1 using a hoisting tool. An insulating sleeve 22 is lowered along a tubing string 16 on a geophysical cable or cable, or wire, or tubing, which is installed in the landing pipe 15 and pipe 2, thereby protecting the pumping unit 9 during the fountain production method, as well as during special technological operations, for example for processing bottom-hole formation zone.

If it is necessary to crimp the tubing 16 on a geophysical cable or cable, or wire, or coiled tubing, a crimping plug 23 is installed, which is installed in the landing pipe 15. The crimping plug allows crimping of the tubing 16 elevator, increasing the reliability and performance of the pump unit 9.

Claims (1)

The bypass system of the pump installation, consisting of a Y-block with a plug, to the one output of which a bypass pipe string is suspended by means of a pipe, connector and burst sleeve, and a pump unit containing an electric motor with a support pipe is connected to the second output through a pipe, a burst sleeve and a balancing valve wherein the bypass pipe string and pump unit are fastened together by protectors and a saddle fixing the support pipe, characterized in that the connector is made telescopic is provided with a locking element in two directions, Y-top unit placed landing nipple adapted to mount the pressing plugs or insulating sleeve, the bypass pipe along the entire pump unit are made continuous and connected through direct coupled gas-tight connection.

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