RU137994U1 - STATIONARY Borehole Jet Pump - Google Patents

Abstract

1. Stationary borehole jet pump, including a stationary housing with holes made in it, a nozzle, a flow distributor made with peripheral axial channels and consisting of a nozzle connected to the central channel, a working insert consisting of a pocket with a mixed flow cavity, a diffuser, a chamber a mixing chamber, a receiving chamber, a nozzle connecting the mixing chamber and the receiving chamber to the flow distributor, characterized in that the stationary borehole jet pump comprises a removable insert, is installed in the upper part of the stationary housing inside the mixed flow cavity and consisting of a housing with sealing cuffs, made with grooves and an internal hole, for the possibility of movement of the piston connected to the rod with a gripping head, while the spring is located on the rod. 2. The stationary borehole jet pump according to claim 1, characterized in that the stationary housing is detachable, in the lower part of which there is a flow distributor connected to a thrust sleeve made with an injection flow channel and equipped with a filter.

Description

Stationary well jet pump belongs to the jet technology and can be used in the operation of gas and gas condensate wells.

All known technical solutions used for mutual mixing (energy exchange) of the active gas with the flow of injected products from the bottom of the wells contain a housing, a diffuser, a mixing chamber, a nozzle, and sealing cuffs.

Known borehole pump installation containing a lifting pipe and installed in it using the upper and lower lock supports the body of the descent jet apparatus. In order to increase the reliability of operation, the apparatus body in the area between the supports has an annular groove, the upper end wall of which has a cross-sectional area greater than the area of the lower end wall [see autosvid. USSR No. 898121, F04F 5/02, publ. 01/15/1982].

A drawback of a well pump installation is the presence of castle bearings, since in the case of formation of paraffin-resinous deposits in the tubing string (hereinafter - tubing), the rise of this well pump installation is difficult due to their possible jamming.

Known borehole pump installation containing a lifting pipe with circulating channels and located in it an inkjet apparatus. In order to increase the efficiency of dewaxing of the column of lifting pipes and making it possible to check their tightness, crimping plugs are located in the circulation channels, and non-return valves are installed above the jet apparatus and in the wall of the lifting pipe [see autosvid. USSR No. 966323, F04F 5/02, publ. 10/18/1982].

A drawback of a downhole pump installation is the probability of the absence of coolant circulation necessary for dewaxing the pipe string due to clogging with paraffins and, accordingly, jamming of the check valve installed in the wall of the lifting pipe.

A well-known jet downhole installation comprising a packer and a jet pump mounted on a pipe string with a housing, an active nozzle, a mixing chamber, a diffuser and a shut-off element with a seat, the shut-off element saddle is made in the jet pump body, and the shut-off element is made with an axial channel. The housing of the jet pump is equipped with several seats for installing plugs or nozzles with mixing chambers and diffusers, the shut-off element is made in the form of a hollow cylindrical body with ring sealing lips on the outer surface of this body, and the upper and lower stop elements are installed in the cylindrical body of the shut-off element, between which intermediate thrust washers and elastic gaskets are placed alternately, moreover, protrusions are made on the end surfaces of the washers, the height of which is nent 0.1-0.3 height elastic pad [see. RF patent No. 2129672, F04F 5/02, publ. 04/27/1999].

The disadvantage of this device is the impossibility of conducting the crimping operation of the tubing string.

Known plug-in downhole jet pump for lifting oil from an unproductive horizon due to the energy of high productivity. In order to lift oil, regardless of the occurrence of productive formations and the possibility of regulating the supply, it is plug-in, with a replaceable and variously composable nozzle, mixing chamber, diffuser and sealing cuffs [see autosvid. USSR No. 156902, ЕВВ 41/00, publ. 09/25/1963].

The disadvantages of the plug-in downhole jet pump are the impossibility of crimping the tubing string, difficulties in removing the plug-in pump from the housing, since the jet pump housing is made welded, not detachable. The disadvantages of the device can also be attributed to the complexity of its manufacture, since the design of the device involves the presence of three seats for seals to comply with the conditions of alignment of the structure.

The closest in technical essence to the claimed device is a removable jet pump, comprising a housing with holes made in it, a check valve, channels for supplying and discharging passive and active media, an active nozzle, a receiving chamber, a mixing chamber, a diffuser, a collet mechanism with a shear pin, the device comprises a flow distributor made with radial channels and a central channel for supplying an active medium, with peripheral axial channels of the passive medium and with an active nozzle installed in it, patr the side connecting the distributor to the mixing chamber, to which the diffuser is connected, and forming the receiving chamber, while the upper part of the jet pump consists of a pocket, a rod and a collet, where the pocket, which acts as an adapter and connects the diffuser to the rod, is made with radial holes for exit well production and a groove for placing the collet in working condition and at the time of extraction of the jet pump, and the rod connected to the collet with a shear pin is equipped with a head for gripping with a fishing tool, as well as the reverse a second valve seat disposed in the inner bore flow controller connected to the distributor flows [see. RF patent No. 2362913, F04F 5/16, publ. 07/27/2009].

The objective of the utility model is to create a device that allows to improve the functions of analogues when working in conditions of deposition of paraffin on the walls of tubing, as well as to carry out pressure testing of tubing without depressurization of the well jet pump.

The task in a stationary borehole jet pump, including a stationary casing with holes made therein, an active nozzle, a flow distributor made with peripheral axial channels and consisting of a nozzle connected to the central channel, a working insert consisting of a pocket with a mixed flow cavity, a diffuser mixing chamber, a receiving chamber, a pipe connecting the mixing chamber and the receiving chamber with the flow distributor, it is decided that the stationary borehole jet pump contains a curved insert installed in the upper part of the stationary housing inside the mixed flow cavity and consisting of a housing with sealing cuffs, made with grooves and an internal hole, for the possibility of movement of the piston connected to the rod with a gripping head, with a spring located on the rod. In this case, the stationary housing of the device is made detachable, and in its lower part there is a flow distributor connected to a thrust sleeve made with an injection flow channel and equipped with a filter 20.

A stationary borehole jet pump is illustrated using graphic materials, in which Fig. 1 shows a stationary borehole jet pump mounted on a tubing string with a removable insert, and Fig. 2 shows a stationary borehole jet pump mounted on a tubing string without a removable insert.

On the tubing string 1, a stationary casing of the borehole jet pump 2 is mounted with a working insert and a removable insert 3, connected to the tubing string 1 through an adapter 4, as well as a packer 5.

A stationary borehole jet pump with a removable insert 3 comprises a stationary housing 2 made of two parts with a threaded connection 6, lowered into the borehole on a tubing string 1, with holes 7 for connecting the annulus to the internal cavity of the working insert, hermetically installed in it, consisting of a pocket 8 with a mixed flow cavity 9, a diffuser 10, a mixing chamber 11, a receiving chamber 12, a pipe 13 connecting the mixing chamber 11 and the receiving chamber 12 with a flow distributor 14, consisting of a nozzle 15 connected about with the Central channel 16, communicating with the hole 7. The flow distributor 14 is made with peripheral axial channels 17 and connected to the thrust sleeve 18, made with the channel of the injected stream 19 and equipped with a filter. Additionally, the stationary borehole jet pump contains a removable insert 3, consisting of a housing 21 with sealing cuffs 22, made with grooves 23 and an internal hole 24, for the possibility of movement of the piston 25 connected to the rod 26 with the gripping head 27, while the spring 26 is located on the rod 26 28. The removable insert 3 is installed in the upper part of the stationary housing 2 inside the cavity of the mixed stream 9.

The stationary housing is sealed with sealing cuffs 29, 30 located in the area of the flow distributor 14.

Between the stationary housing 2 and the adapter 4, a sealing ring 31 is installed for fixing the jet pump in the well.

Stationary well jet pump with a removable insert operates as follows.

The principle of operation of the device is based on the use of the energy of high-pressure gas pumped through the annulus into the pump to lift the production of the well to the surface and transport it to the gas collection system. The design features of the pump are the ability to lower into the well and raise the recoverable insert 3 using cable technology, without lifting the tubing string.

The stationary housing 2 with the working insert and with the removable insert 3 installed in it, mounted on the adapter 4, is lowered on the tubing string 1 together with the packer 5 to a predetermined depth. The extractable insert 3 is sealed in the cavity of the mixed stream 9 of the pocket 8 of the working insert. The operation of crimping the tubing string is carried out, the insert 3 is removed from the stationary housing 2 using cable equipment (not shown in Fig. 1). The gripping head 27 is hooked and the rod 26 is lifted, which moves along the inner hole 24 of the removable insert 3, while the spring 28 is compressed and the piston 25 opens the grooves 23 in the housing 21, through which the medium flows from the tubing string 1 under the removable insert 3. Then the removable insert is freely removed from the pocket 8 of the working insert.

Without the removable insert 3, the stationary borehole jet pump performs the functions of raising the borehole products to the surface and transporting them to the gas collection system.

The operation of the jet pump without the removable insert 3 is described below.

High pressure active gas is supplied to the annulus. Through the holes 7 of the stationary housing 2, the central channel 16 of the flow distributor 14 and the nozzle 15, the active gas enters the receiving chamber 12. When the active gas passes through the nozzle 15, a vacuum is created in the receiving chamber 12, transmitted through the peripheral axial channels 17 of the flow distributor 14.

The formation fluid coming from the wells through the central hole 19, the peripheral axial channels 17 of the flow distributor 14, the receiving chamber 12, is entrained in the active gas and enters the mixing chamber 11, in which mixing and energy exchange between the interacting flows takes place. Next, the mixed stream enters the diffuser 10, in which due to the smooth deceleration of the flow rate, pressure increases - up to the value necessary to raise the product to the surface.

In the conditions of paraffin deposition on the walls of the tubing, the well is periodically flushed, that is, the reagent is fed into the tubing string 1 with subsequent flow through the peripheral axial channels 17 of the flow distributor 14 and the channel of the injectable stream 19, the stop sleeve 18 into the bottom. The thrust sleeve 18 is made with a filter 20.

The stationary housing 2, made with thread 6, allows you to easily remove the working insert with the possibility of replacing the nozzle 15, the mixing chamber 11, the diffuser 10 in case of wear.

The stationary borehole jet pump was successfully manufactured by specialists of the Gazprom VNIIGAZ branch in Ukhta and introduced at well No. 199 of the Vuktylsky oil and gas condensate field. During the use of the device, positive dynamics were obtained in the production of gas, condensate and water.

Failures and jamming during the operation of the device in the well did not occur; during the operation of the device, a reduction in the time for the operation of crimping the tubing string was noted.

Claims (2)

1. Stationary borehole jet pump, including a stationary housing with holes made in it, a nozzle, a flow distributor made with peripheral axial channels and consisting of a nozzle connected to the central channel, a working insert consisting of a pocket with a mixed flow cavity, a diffuser, a chamber a mixing chamber, a receiving chamber, a nozzle connecting the mixing chamber and the receiving chamber to the flow distributor, characterized in that the stationary borehole jet pump comprises a removable insert, is installed in the upper part of the stationary housing inside the mixed flow cavity and consisting of a housing with sealing cuffs, made with grooves and an internal hole, for the possibility of movement of the piston connected to the rod with a gripping head, with a spring located on the rod. 2. The stationary borehole jet pump according to claim 1, characterized in that the stationary housing is detachable, in the lower part of which there is a flow distributor connected to a thrust sleeve made with an injection flow channel and equipped with a filter.

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