RU2296213C2 - Packer pumping plant for well formations operation - Google Patents

Abstract

FIELD: hydrocarbon production equipment, particularly for simultaneous separate, continuous, serial, periodical or combined fluid production.

SUBSTANCE: plant comprises pump and two packers, which are connected to pipe string and lowered in well. One packer is located over upper formation, another one is arranged between formations. Pump has shell and is installed between the packers or over packer located above upper formation. Packers may be automatically or hydraulically operated and may be provided with cable input means. Shell is fastened to one or both packers. Bypass unit or gas separator or jet ejector for gas discharge is installed between shell and packer.

EFFECT: increased reliability and functional capability of pumping plant and enhanced efficiency of multizone well operation.

10 cl, 7 dwg

Description

The invention relates to techniques and technologies for hydrocarbon production and is intended for simultaneous, separate, continuous, alternate, periodic or combined operation (production of fluid and / or injection or utilization of water, gas, gas-liquid mixture, etc.) of well objects equipped with a pumping unit (e.g. , ESP, USGGN, etc.), including for downhole injection of fluid (water, liquid, gas-water mixture, etc.) from one object (formation, layers, interlayers) to another with the purpose of regulating and maintaining the optimal - design reservoir pressure and, accordingly, an increase in the oil recovery coefficient (oil displacement) for producing wells, in addition, for continuous or periodic disposal by a well pump of a medium (water, liquid, gas-liquid or gas-water mixture, and others supplied from the wellhead) to the facility or objects, as well as to isolate the object (leaky interval or water reservoir) and / or use the installation in order to exclude the possibility of disruption of the pump supply under difficult operating conditions azhin.

A packer unit of the ESP type (L. G. Chicherov. Oilfield machines and mechanisms. M .: Nedra, 1983, pp. 169-197) for simultaneous and separate operation of two production layers of one well, including lowered and installed, is known as an analogue. a packer and a pumping device, consisting mainly of a pump with a receiving grid and a submersible electric motor with a power cable, into the well on the pipe string.

A method and a pumping unit (RF Patent No. 2132455) for injection are known as an analogue, including a packer lowered into a well on a pipe string and a pumping device consisting mainly of a pump and a submersible electric motor with a power cable. Here, fluid from the surface of the well is fed into the pump intake and then pumped under high pressure into the reservoir.

Also known as an analogue is a packer pumping unit (RF Patent No. 2140019) for fluid production, including a pumping device deflated and installed in a borehole on a pipe string, consisting mainly of a pump and a submersible electric motor with a power cable, and a packer in the form of an expansion sleeve installed between the electric motor and the pump. This installation can be used to extract fluid from the lower reservoir and pump it through the annulus either to the wellhead or to the upper reservoir.

A packer pumping unit is known as a prototype (RF Patent No. 2194152), including a pump lowered into a well on a pipe string, a packer above the upper object and / or a packer between objects, without or with a column disconnector or telescopic connection, and bypass nodes in the form of a borehole chamber and / or valves, moreover, the packer or packers are installed in the wellbore with the possibility of separation of objects between themselves, while above the packer above the upper object and / or between the packers at least one bypass node is located, and below the packer I am waiting for the objects to have a shank, equipped with a nipple or tip, or a filter, or at least one bypass node and below its plug.

These installations have a limited scope, in particular, are not acceptable under complicated operating conditions for wells.

The aim of the invention is to increase the reliability and functionality of the pumping unit.

The technical result is achieved by equipping the pump installation with a casing and tightly connecting it to a packer or packers made without or with a cable entry.

The purpose of the invention is achieved by the following technical solutions.

The pump is made with a casing and is located between the packers or installed above the packer located above the upper object, at least one packer is of mechanical or hydraulic action and is made with or without cable entry, and the pump or its casing is connected at least , with one packer, and between the pump and its casing or between the casing and the packer a bypass assembly is placed or a gas separator or jet ejector is installed. In this case, the bypass assembly can be made in the form of a borehole chamber with a valve or a blind plug. The pump casing can be made of pipes of larger diameter, while the pump is suspended inside it. At least one packer may be equipped with a column disconnector or telescopic connection for reliable operation of the installation. Above the packer located above the upper object or between the objects or between the packers there is a bypass unit for the possibility of bypass flow. The pipe string is equipped with a plug at the bottom to bypass the flow through the bypass assembly and control the flow parameters during operation of the facility. The pump casing can be installed above the inlet module (intake) of the pump and its lower end is hermetically and rigidly or non-rigidly connected to the packer. Between the pump and the bypass assembly, a downstream flow meter can be lowered to measure the flow rate. In order to be able to fit or tear packers separately, a pipe string disconnector of two hermetically but loosely connected parts is installed between the packers. Also, for the possibility of sequential breakdown of the packers, a telescopic connection is established between them with an undisclosed free play.

These solutions generally increase the reliability and functionality of the pumping unit under difficult operating conditions for wells, and accordingly, the efficiency of the operation of an oil producing or injection well with one or more reservoir objects, interlayers or an unpressurized section of the wellbore is increased.

Options for pump packer installation are shown in figures 1 to 7, in particular:

figure 1 - installation, either for continuous or periodic production by a well pump of fluid from the lower object P ₂ while isolating the upper object P ₁ (for example, a leak in the well, water reservoir, etc.), or for downhole injection, that is, for production by a well pump fluid (water) from the lower object P ₂ and partially or completely pumped it into the upper object P ₁ , or for periodically pumping the medium from the well surface to the upper object P ₁ after the pump stops and, accordingly, closing the lower object P ₂ ;

figure 2 - installation either for the extraction of the medium by the downhole pump from the upper object P ₁ and pumping it into the lower object P ₂ , or for pumping the medium from the well pump into the object P ₂ (when the upper object P _{1 is} closed or absent and / or the upper packer), or for pumping a medium (for example, water and / or gas) into object P ₂ , supplied both from the wellhead and produced by a well pump from object P ₁ ;

figure 3 - installation or for oil production by a borehole pump from one object when isolating another object (for example, leakage of a trunk or water reservoir, etc.), or for production of oil by a borehole pump of oil from objects during their simultaneous, separate, periodic or sequential study and operation;

figure 4 - installation either for downhole pumping of oil from the lower object P ₂ when closing the upper object P ₁ , or for extracting medium from the lower object P ₂ and partially or completely pumping it into the upper object P ₁ , or for injection into one of the objects of the medium supplied from the wellhead and extracted by the well pump from another object;

figure 5 - installation for injection into the upper object of the medium, or for pumping the medium (water, gas-liquid mixture) with a well pump into the object or objects supplied from the mouth and produced by the well pump from the lower object;

figure 6 - installation for injection by a borehole pump into an object or objects of the medium (gas-liquid or gas-water) supplied from the mouth;

Fig.7 - installation for separating the fluid of one object into water, gas and / or oil, and pumping water into another object.

Installation (Fig.1-7) for the operation of one or more objects (P ₁ , P ₂ , etc.) wells includes running and installed in the well 1 on the pipe string 2 pump 3, packer 4 above the upper object P ₁ and / or packer 5 above object P ₂ or between objects P ₁ and P ₂ , without or with a column disconnector (or telescopic connection) 6, and one or more bypass nodes 7, 8, 9 (in the form of a borehole chamber and / or valve). Packer 5 or packers 4 and 5 are installed in the wellbore 1 with the possibility of separation of objects P ₁ and P ₂ among themselves, while above the packer 4 above the upper object P ₁ and / or between packers 4, 5 there is one 7 (Fig.2- 4) or several 7, 9 (see FIGS. 1, 5) bypass nodes, and below the packer 5 between objects P ₁ and P ₂ , a shank 10 equipped with a nipple (or tip) 11 and / or a filter 12, or, at least one bypass node 13 (see figure 3) and below it with a plug 14. The pump 3 is made with a casing 15 (Fig.1-5) or without it (while in Fig.4 casing 15 should be absent) and installed either above the packer 4 above the upper object P ₁ (figure 3) or between the packers 4 and 5 (figures 1, 2, 5), or below the packer 5 (figure 4) or above the packer 5 (in this case, the packer 4 must be absent) located between objects P ₁ and P ₂ (Figs. 1, 2, 5). The packer 4 and / or 5 is a mechanical and / or hydraulic action and is made without or with a cable entry 16. The pump 3 on top is connected to a packer 5 (see figure 4) located between objects P ₁ and P ₂ , or its casing 15 top and bottom is connected with packers 4 and 5 (see figures 1, 2, 5).

The casing 15 is lowered into the well 1 on the pipe string 2, is made of pipes of larger diameter (FIGS. 1, 2) and the pump 3 is suspended inside it. Also, the casing 15 can be installed under the input module 17 of the pump 3 and its lower end is hermetically tight ( figure 3) or not rigidly (figure 5) is connected with the packer 4 or 5. Between the casing 15 and the pump 3 or the packer 4 can be installed gas separator (or ejector, injector) 18 and / or 19 (figure 3) during production oil (for example, to bleed from it associated, free gas in the annulus above the input module 17 of the pump 3, etc.) or dispersant 20 (f D.2, 6) in the injection medium (e.g., to disperse the gas and water mixture prior to injection into an object, etc.).

To control the operation parameters of the objects in each well chamber (overflow unit) 7, 9, 13 is either absent or a valve 21, 22, 23 is installed (Figs. 1-6), for example, in the form of a blind plug, fitting, shutoff device, stabilizer, a regulator, a measuring device, a flow meter, a manometer, a debitometer, a differential bypass unit, and others. To measure the flow rate of water pumped into the upper or lower object, between the pump 3 and the borehole chamber 7 located between the packers 4, 5 or objects P ₁ , P ₂ , a measuring device, for example, a depth meter 24, was lowered (Fig. 1, 2) and others.

The bypass unit 8 can also be made in the form of a borehole chamber located above the packer 4 above the upper object (Figs. 1-7), and a valve is installed in it in the form of a dead plug or a measuring device, or a stabilizer of a dynamic liquid level, or a bypass differential unit for the possibility of circulation of the medium, etc.

When injecting the same or different medium (see Fig. 5), extracted from the lower object and supplied from the wellhead between the bypass nodes 7 and 9, a plug or plug 25 can be installed. Moreover, the medium pumped from the wellhead can be gas, gas and water mixture, surfactant and others.

Installation for a number of options can work as follows.

Under complicated oil production conditions, before starting pump 3 (see FIG. 3), an object or objects can be mastered (after packer 5 or packers 4, 5 are planted) by swabbing fluid in a pipe string 2. After starting pump 3 into operation from an object or objects the oil enters through the bypass nodes 7 and / or 13 into the pipe string 2 and from there to the pump 3 intake, where a head is created and the oil flow is directed to the wellhead 1. At the same time, gas is released from the oil and bleed into the annulus through the gas separator 18 and / or 19. Here the top object can be isolates IAOD by setting valve 21 in the well chamber 7. Also, in installing an upper packer 4 may be omitted. Here, the valve 21 in the form of a cut-off can be closed to examine the lower object, from increasing the dynamic level of the liquid or the excess pressure created in the annulus.

During downhole injection, the medium is extracted from one object by pump 3 (Figs. 1, 2, 4 - 7) and is pumped completely or partially into another object. In this case, the flow rate of the medium can be measured by a flow meter 24 or valve 21. Here, also, the medium into the object can be directed both from the wellhead 1 and from another well object, in a particular case through a dispersant 20.

The installation can also be used for the combined method of "injection - production", as well as for various options for injection and / or production of the medium from the object or objects of the well.

Claims (10)

1. A pump packer installation for operating well strata, including a pump lowered into a well on a pipe string, two packers, one of which is installed above the upper stratum and the other between the strata, while the pump is made with a casing and a liner and placed between packers or higher a packer located above the upper layer, packers of mechanical or hydraulic action with or without cable entry, the shank is connected to the packer or packers, and a bypass assembly, or gas separator, or rudimentary ejector for bleeding gas. 2. Pump packer installation according to claim 1, characterized in that the bypass assembly is made in the form of a borehole chamber with a valve. 3. The pump packer installation according to claim 1, characterized in that the pump casing is made of pipes of a larger diameter, while the pump inside is suspended. 4. The pump packer installation according to claim 1, characterized in that it has a column disconnector or telescopic connection for packers. 5. The pump packer installation according to claim 1, characterized in that it has a bypass assembly and above the packer above the upper layer, or between the layers, or between the packers. 6. Pump packer installation according to claim 5, characterized in that the pipe string is equipped with a bottom plug. 7. The pump packer installation according to claim 1, characterized in that the pump casing is mounted above the pump inlet module and its shank is hermetically and rigidly or non-rigidly connected to the packer. 8. Pump packer installation according to claim 1 or 5, characterized in that a depth flow meter is lowered between the pump and the bypass assembly. 9. The pump packer installation according to claim 4, characterized in that for the possibility of packing or tearing the packers separately, the pipe string disconnector of two hermetically, but not rigidly connected parts is installed between the packers. 10. The pump packer installation according to claim 4, characterized in that for the possibility of sequential disruption of the packers, a telescopic connection is established between them with an unopened freewheel.

Images