RU2425955C1 - Garipov hydraulic reusable packer, installation and method for its implementation - Google Patents

Abstract

FIELD: oil and gas industry. ^ SUBSTANCE: hydraulic reusable packer includes mandrel, sealing element, channel or channels connected to hydraulic chamber, at least one hydraulic high pressure channel made in the form of tubular element of uniform or variable cross section and attached to movable and/or fixed elements of packer. Pump packer installation includes pump, at least one hydraulic reusable packer, high pressure delivery device connected by means of high pressure hydraulic channel to hydraulic reusable packer, which is located above pump receiving area or below pump receiving area. Operating method of pump packer installation involves lowering to the well of pump, pipe string, hydraulic reusable packer or hydraulic reusable packers; at that, pump receiving area is isolated from intervals of perforation and/or leakage with the above packer or packers and isolation is performed simultaneously or in turn at the specified time intervals. ^ EFFECT: invention provides for multiple use of hydraulic packer in the well, eliminates lowering and lifting operations, provides higher operating efficiency of well owing to controlling the pressure in real time mode in hydraulic channel, and reduces complexity and metal consumption of devices and achieving maximum mining capabilities. ^ 22 cl, 12 dwg

Description

The invention relates to the oil industry and can be used in the production of fluid (oil, gas, etc.) or pumping a working agent into a well during simultaneous separate operation of one or more formations, as well as for periodically cutting off and isolating the formation or leaking intervals, including including with the ability to regulate the connection or disconnection of working formations in real time.

Known hydraulic packer containing a housing equipped with a hydraulic cylinder with a piston, cuffs (Application No. 2002135307, ЕВВ 33/12, op. December 27, 2004).

The disadvantage of this invention is that the hydraulic packer is driven by a short-term increase in pressure inside the tubing or in the annulus by a predetermined amount, leading to a shear of shear screws. In this case, the increase in pressure is provided due to injection of liquid from the wellhead into the pipe or annular space. When the well fluid penetrates under pressure through an opening inside the barrel or outside the packer into the hydraulic cylinder forming the hydraulic chamber, shear screws are cut and the piston is extended and the hydraulic packer is packaged (installed). To operate the hydraulic packer by increasing the in-pipe pressure by a predetermined amount, it is necessary to drop the ball, sphere or install a device under the packer that covers the tube space, for example, in a nipple or coupling. However, the installation of a sealing device inside the pipes under the hydraulic packer, which is necessary for raising the pressure and its operation, is not always possible due to a failure in the tubing or a loose leak in the nipple due to deposition of fur. impurities with paraffin, narrowing the bore, as well as due to leakage of the tubing. This significantly limits its applicability and reduces the effectiveness of its use.

In addition, the action of the packer is one-time, it is packaged at the time of cutting off the shear (screws) and fixing (slips) elements of the anchoring mechanism, and unpacking and re-packing involves lifting the packer to the surface to install the shear screws. This design limits its technological application.

For annular hydraulic packers that operate by increasing the pressure in the annulus, there are also problems of the impossibility of increasing the pressure to the pressure required to actuate the packer. For example, in the case where highly absorbing intervals are present in the well, situations arise when it is impossible to increase the pressure in the annulus of the well and, accordingly, in the hydraulic cylinder to the specified value due to injection of the agent from the wellhead, which will not cause the hydraulic packer to operate. Those. a hydraulic packer triggered by annular pressure is also of limited use and cannot be used in wells with highly absorbing intervals, formations, where it is impossible to raise the annular pressure required for operation and installation of a hydraulic packer by a predetermined amount.

Known packer device containing a packer, which includes a housing with a cuff placed on its surface, a movable cylinder equipped with a hydraulic chamber with channels (RF Patent No. 41078, ЕВВ 33/12, op. 10.10.2004, prototype).

A disadvantage of the known device is that the packer is a one-time action, since after its installation, when the pressure drops to the initial level, the packer does not return to the transport position. The packer cannot be used repeatedly or repeatedly without lifting to the surface, respectively, without bulkheads and revisions, it cannot be removed and installed many times, due to the presence of shear screws and fixing elements, which determine its single use. The packer cannot be reinstalled and moved if a leak occurs, for example, if rubber cuffs get into the coupling recess of the production casing. In addition, the hydraulic chamber of the known packer is connected via narrow channels to the tubing in-pipe space, therefore, in the case of a high content of mechanical impurities in the well fluid, the channels may become clogged when the packer is lowered or at the time of increase in the tube pressure. Clogging of the channels often leads to the inability to increase the pressure inside the hydraulic chamber and, accordingly, to premature packer failure. All of the above leads to the limited use of hydraulic packers with shear screws and locking elements presented in the prototype.

A well-known installation of simultaneous and separate operation of multilayer wells, containing a pump and one or more packers lowered into a well on a pipe string (RF patent No. 2313659, EV 43/14, op. 27.12.2007).

The disadvantage of this installation is that in it packers are used only for a single separation of the layers, and not as regulatory devices. In real time, it is impossible to pack and unpack packers from the wellhead and periodically alternate messages or disconnect the pump from the overlying or underlying perforation interval, and only various bypass devices and valves are used here as a control device for changing the flow section.

A well-known pump packer installation for the operation of well strata, comprising a pump and two hydraulic packers lowered into the well on a pipe string, one of which is installed between the strata (RF patent No. 2296213, ЕВВ 43/14, op. March 27, 2007, prototype).

A disadvantage of the known solution is that two packers are used, one of which is installed above the upper layer, and the other between the layers, and the pump is placed between the packers, i.e. here, hydrodynamic communication of one of the strata with a pump is foreseen everywhere, which cannot be cut off from the pump; moreover, only one packing is provided for a single separation of strata. In this case, the regulation of simultaneous-separate injection or production is carried out by regulating bypass nodes, complicating the design, which does not include cutting off and regulating production from the reservoir with which the pump is in hydrodynamic connection.

There is a known method of operating a pumping downhole installation, including lowering a pump and hydraulic packers into the well and installing one of the hydraulic packers between the perforation intervals below the pump (RF patent No. 2296213, M. Cl. E21B 43/00, op. 27.39.2007).

The disadvantage of this method is that the bottom and top of the pump are equipped with disposable hydraulic packers, which does not allow them to regulate the operation of the layers in real time, in addition, the pump is always hydrodynamically connected to one of the layers and separate operation of this pump of other layers is not provided , in this regard, there is no separate and alternate operation of two reservoirs by the pump, including separate sampling of wellhead samples to determine the component composition of the fluid separately about every layer.

A disadvantage of the known method is that it does not allow in real time using a deep pump to cut off from it each layer or all layers in turn, for example, for deep hydrodynamic studies. The method does not allow, at the mouth, to receive inflow separately from each separate formation for sampling and conducting a detailed study of the composition of the formation fluid, i.e. samples can be taken separately only for one reservoir with which the pump is in hydrodynamic connection, and for the rest of the reservoirs we will receive an inflow together with the reservoir that is hydrodynamically connected to the pump.

The method does not provide for the possibility of regulating the simultaneous-separate operation of at least one of the layers with which the pump is in hydrodynamic communication.

A known method of simultaneous and separate operation of multilayer wells, including the descent into the well of a string of pipes equipped between hydraulic layers with hydraulic packers to separate the layers, and a pump (RF patent No. 2313659, ЕВВ 43/14, op. 27.12.2007, prototype).

The disadvantage of this method is the use of a technologically too complicated combination of packers, for example, various constrictors are used to control the inflow, for example, fittings, regulators, valves, borehole chambers with shut-off elements, etc., which significantly narrow the flow section, increase hydrodynamic drags and, accordingly, reduce the flow of formation fluid, which reduces the effectiveness of the method.

In the known method provides only separate and sequential operation of two layers of different narrowing devices, which reduces the efficiency of the method.

The proposed technical solution avoids the above drawbacks, and also allows you to reuse a hydraulic packer in the well, eliminating tripping operations, increase the efficiency of the well by regulating the pressure in real time in the hydraulic channel by cutting off one or more formations at the same time-separate or alternating operation, make real measurements, obtain actual data on the composition of the produced fluid, achieve maximum su Seine flow rates due to a reduction of hydraulic resistance due to the lack of narrowing devices, reducing the complexity and metal devices.

This goal is achieved in that the hydraulic reusable packer includes a barrel, at least one elastic sealing element, at least one hydraulic chamber located between the movable and fixed elements of the packer, a channel or channels connected to the hydraulic chamber, at least one hydraulic channel of high pressure, made in the form of a tubular element of constant or variable cross section and hermetically connected by means of a connecting device or threaded connection with movable and / or fixed packer elements, which are made with a channel or channels, the tubular element of constant or variable cross-section is a load-bearing, armored umbilical, equipped with at least one tube, one conductive core, the connecting device is a coupling, a sub , the stuffing box, the fitting in the form of a constricting element, the movable elements are made in the form of a piston or plunger, in the form of a pusher or sleeve, inside the movable and / or fixed elements you through holes for transit passage of the cable and / or tubular element are filled, the barrel is hollow or monolithic, it is additionally equipped with at least one return spring located between the movable and fixed elements, at least one regulating device located in the hydraulic channel high pressure and / or in the channel or channels, round and / or flat dies, o-rings with elastic and sealing properties separating the movable and / or fixed elements between at the other.

The pump packer installation includes a pump lowered into the well on a pipe string and at least one hydraulic reusable packer, a high-pressure head device, hermetically connected via a high-pressure hydraulic channel to a hydraulic reusable packer located above the pump intake zone or below the reception zone the pump, the hydraulic reusable packer is placed on the tubing above the pump or on the liner under the pump at a given distance, the pump is located above the hydraulic reusable akera or hydraulic reusable packers, and the pump receiving area is located between the hydraulic reusable packers, the pump is a sucker rod pump or an electric centrifugal pump with or without a casing, the high-pressure device is a discharge or production pump and / or a high-pressure line in the form of a pressure line reservoir or pressure pipe with high pressure medium, pressure pipe with high pressure medium is a constant tubular element variable or variable cross-section, it additionally includes at least one instrumentation.

A method of operating a pump packer installation includes lowering a pump, pipe columns, a hydraulic reusable packer or hydraulic reusable packers into the well, wherein the pump receiving area from the perforation and / or leakage intervals is cut off with a hydraulic reusable packer or hydraulic reusable packers and the cutting is performed simultaneously or alternately in predetermined time intervals.

Figure 1 shows a hydraulic reusable packer in a transport state with a piston and with two adapters for connection to two umbilicals, figure 2 shows a hydraulic reusable packer with round dies and with one external supply hydraulic channel with a connecting connector, figure 3 shows hydraulic reusable packer with round and flat dies, as well as with one stuffing box for connecting the channel to the hydraulic channel of high pressure, figure 4 shows the hydraulic reusable packer with two hydraulic chambers connected through channels to two separate hydraulic high pressure channels, Fig. 5 shows a pump packer unit with a centrifugal pump and with one hydraulic reusable packer lowered into the well between the perforation intervals, Fig. 6 shows a packer pump installation with a centrifugal pump, ejector, liner and with two hydraulic reusable packers, lowered into the well between the intervals of perforation, Fig.7 shows a pumping packer mouth ION with espagnolette plunger pump with two hydraulic reusable packer, shown in Figures 8-11 pumping installation in a well packer with two hydraulic reusable packer and a pump mounted between perforation intervals, Figure 12 shows a hydraulic reusable packer with three hydraulic channels.

The hydraulic reusable packer includes a barrel 1, at least one elastic sealing element 2, for example, in the form of a rubber sleeve, at least one hydraulic chamber 3, which is located between the stationary and movable elements of the hydraulic reusable packer, a channel or channels 4 connected with a hydraulic chamber 3 and located in the movable and / or fixed elements of the hydraulic reusable packer, and at least one hydraulic channel of high pressure 5, hermetically connected dstvom connecting device 6 or a threaded connection with a mobile and / or stationary elements of the hydraulic reusable packer, which are formed with a channel or channels 4.

The high pressure hydraulic channel 5 is a tubular element of constant or variable cross-section, made, for example, in the form of a pipeline, a load-carrying umbilical, equipped with at least one tube, optionally having at least one conductive core with load-bearing armor.

The barrel 1 is made hollow (Fig.1-4) or monolithic (Fig.5, 8-11).

The fixed element is a fixed barrel 1 with a sleeve 7 (Fig.1-7) or at least one hydraulic cylinder 8 (Fig.1-7).

The movable element is a piston 9 (figure 5, 12), a plunger 10 (figure 2, 4, 5), a pusher 11 (figure 1, 5) and a pusher 11 with a sleeve 12 (figure 2, 3, 4, 6, 7).

Inside the movable and / or fixed elements of the hydraulic reusable packer, through holes are made for the transit passage of the power cable and / or tubular element, for example, a high pressure hydraulic channel 5 (Figs. 5, 7).

The plunger 10 or piston 9 is, for example, a movable sleeve tightly, but not rigidly mounted on the barrel 1 (Fig.2, 4, 5-7) or in the hydraulic cylinder 8 (Fig.1-7) on the barrel 1 with a sleeve 7 .

The hydraulic chamber 3 is located, for example, between a fixed element, for example a barrel 1 with a sleeve 7, and a movable element, for example a piston 9, and also between a barrel 1 with a sleeve 7 and a plunger 10, between a hydraulic cylinder 8 and a plunger 10, between a hydraulic cylinder 8 and a piston 9, between the barrel 1 with the coupling 7 and the pusher 11, between the hydraulic cylinder 8 and the pusher 11 and other options.

The channel or channels 4 are made in a stationary barrel 1 or a sleeve 7 located on the barrel 1, or in a hydraulic cylinder 8, rigidly connected to the sleeve 7 or the barrel 1.

In the hydraulic chamber 3 or hydraulic chambers 3, the high-pressure medium enters through the channel or channels 4 located either in the fixed elements (Figs. 1-7) or in the moving elements, for example, in the pusher 11.

An elastic sealing element 2 is placed on the barrel 1 (Figs. 1, 3-7) between the stationary locking sleeve 7, rigidly mounted on the barrel 1, and the piston 9, or the movable sleeve 12, which is impacted by the pusher 11.

The elastic sealing element 2 is additionally placed on the movable elements, for example on the piston 9, the plunger 10, on the pusher 11 (figure 2), which is sealed at the moment the pusher 11 enters the groove of the coupling 7.

When the elastic sealing element 2 is sealed in the well under the influence of an approaching piston 9, or pusher 11, or plunger 10, the elastic sealing element 2 is pushed out and inflated outward until it contacts the production string (Fig. 4), which leads to cutting off the over-packer region from the under-packer space , the upper perforation interval from the lower perforation interval.

The connecting device 6 is made in the form, for example, of a coupling, adapter, sub, stuffing box, fitting, to which at least one hydraulic channel 5, isolated from the well fluid, is connected (FIGS. 1-7).

The hydraulic reusable packer is additionally equipped with O-rings 13 (FIGS. 1-7) made of a material with elastic and sealing properties that separate the movable and / or fixed elements of the packer among themselves.

O-rings 13 are necessary for sealing the hydraulic chamber 3 and are placed in annular grooves made, for example, on the surface of the barrel 1, in the plunger 10 or on the piston 9 and pusher 11 or in other fixed and movable elements (Figs. 1-7).

The hydraulic reusable packer is further provided with at least one return spring 14 (FIG. 3) located between the movable and fixed elements.

Also, the hydraulic reusable packer is additionally equipped with a pressure hydraulic pump 15 with an electric drive located inside or outside (Fig. 3) of the hollow barrel 1 and / or in the tubing 16 connected to the barrel 1.

The hydraulic reusable packer is additionally equipped with round 17 and / or flat 18 dies (FIGS. 2-5, 12), which can be located in the pusher 11 (FIGS. 3-7), or in the die assembly 19 (FIG. 2).

The elastic sealing element 2 is additionally placed on the barrel 1 between the round dies 17 and flat dies 18.

The pusher 11 is a movable device, including, for example, additionally round dies 17 attached to the piston 9 (figure 3).

The reusable hydraulic packer is further provided with at least one control device 20 in the form of a bypass device or a check valve, for example a bleed valve 20, located in the high pressure hydraulic channel 5 and / or in the channel or channels 4. The valve for bleeding 20 opens when preset pressure and serves to prevent the occurrence of increased pressure in the hydraulic chamber 3, and is also intended for bleeding and pumping fluid in the hydraulic channel of high pressure 5 in tea hit by gas bubbles, dirt, etc.

The channel or channels 4 connect the high pressure hydraulic channel 5 to the hydraulic chamber 3 and are located either in stationary elements (Figs. 1-7) or in the movable elements of a hydraulic reusable packer, for example, in a hydraulic cylinder 8 or in a plunger 10, in a hydraulic cylinder 8 or in a piston 9, in hydraulic cylinder 8 or clutch 7, in hydraulic cylinder 8 or barrel 1.

For example, the discrete movement of movable elements, such as a piston 9 of a hydraulic reusable packer, relative to stationary elements, such as a hydraulic cylinder 8, is carried out by discrete changes in pressure in the hydraulic channels of high pressure 5 and in the hydraulic chamber 3.

In the channel or channels 4 additionally made bores, grooves and recesses 21 with a thread or with pins, providing a connection of the regulating element or valve for bleeding 20 with the hydraulic chamber 3 and interacting with the interior under the round dies 17 or to actuate the locking elements of the valve for etching 20 (Fig.1, 3, 4) or for installing measuring instruments (Fig.8-11).

The pump packer installation includes a pump 22, for example, an electric centrifugal pump (Figs. 4-5, 8-11) or a sucker-rod plunger pump (Fig. 7), lowered into the well on a pipe string 16, and at least one hydraulic reusable packer 23, high-pressure head device 24, which is hermetically connected by means of a hydraulic channel of high pressure 5 to a hydraulic reusable packer 23 located above the receiving zone 25 of the pump 22 or below the receiving zone 25 of the pump 22.

A reusable hydraulic packer 23 is located on the tubing 16 above the pump 22 or on the shank 26 under the pump 22 at a predetermined distance.

The pump 22 is located above the hydraulic reusable packer 23 or the hydraulic reusable packers 23, and the intake zone 25 of the pump 22 is located between the hydraulic reusable packers 23.

In addition, the pump 22 or the receiving zone 25 of the pump 22 is installed under the hydraulic reusable packer 23 or between the hydraulic reusable packers 23, which are placed between perforation intervals, for example, 29 and 30 and / or leaks.

If there are two hydraulic reusable packers 23 in the pump packer installation, one of them is located above the pump 22 on the tubing 16 or on the pump 22 above its intake zone 25, and the other hydraulic reusable packer 23 is located under the pump 22, for example, on the shank 26, or on the pump 22 below its reception zone 25. In this case, the upper hydraulic reusable packer 23 is placed on the tubing 16 above the reception zone 25 of the pump 22 at a predetermined distance, and the lower hydraulic reusable packer 23 is located under the reception zone 25 of the pump 22, or directly in its lower Asti or on the shank 26. The upper and lower hydraulic reusable packers in real time produced alternately cutting off the upper and lower layers of perforation intervals.

The reception zone 25 is the suction zone of the pump 22 in the chamber area of the receiving valve of the installation of the pump SHGN 22 or the receiving grid of the installation of the pump ESP 22.

The pump 22 is a sucker rod pump with a plunger with suction and discharge valves or an electric centrifugal pump with a casing 27 or without casing, which can be additionally equipped with a shank 26 (Fig.5-7).

A high pressure hydraulic channel 5 is connected at one end to a high pressure head device 24, and at the other end is connected to a channel or channels 4 located in the movable and / or fixed elements of the hydraulic reusable packer.

The high-pressure pressure device 24 located on the surface (Fig. 5) is filled with a high-pressure medium and is a pressure pump in the form of an injection or production and / or high-pressure pressure line in the form of a pressure tank or pressure pipe with a high-pressure medium, through which injection of the working agent in the form of a high pressure liquid medium into the high pressure hydraulic channel 5 to create a predetermined pressure in the hydraulic chamber 3 or gaseous medium high pressure, for example, to purge or reduce the density of the medium in the high pressure hydraulic channel 5.

The high-pressure pressure device 24 in the form of a pressure pipe with a high-pressure medium is a tubular element of constant or variable cross-section.

The high-pressure medium for raising the pressure in the hydraulic chamber 3 is a weakly compressible or incompressible liquid in the form of water or a non-freezing medium in the form of transformer oil, antifreeze, etc.

In order to be able to purge and decrease the density in the high pressure hydraulic channel 5, a gaseous medium is used as a high pressure medium.

The high-pressure pressure device 24 in the form of an injection or production pump is additionally equipped with an electric drive pump 15 (Fig. 3).

A pressure hydraulic pump 15 with manual control or electric drive serves to supply a high-pressure medium under pressure to the high pressure hydraulic channel 5 and channel or channels 4 and then to the hydraulic chamber 3. The operation of the hydraulic pump 15 with electric drive is controlled by various electric relays.

Pump packer installation further includes at least one control measuring device 28 (Fig.8-11).

In the pump packer installation, it is also possible to shut off the pump 22 simultaneously with two hydraulic reusable packers 23 from above 29 and the underlying 30 perforation intervals in order to conduct geophysical studies, including obtaining pressure recovery curves for each formation (Fig. 11).

A method of operating a pump packer installation includes lowering a pump 22 into a well, a pipe string 16, a hydraulic reusable packer 23 or hydraulic reusable packers 23 for separating formations — perforation intervals, for example, 29 and 30, while the receiving zone 25 of pump 22 from perforation intervals, for example , 29 and 30 and / or leaks are cut off with a hydraulic reusable packer 23 or hydraulic reusable packers 23. The perforation intervals, for example, 29 and 30 and / or leaks, are cut off simultaneously or alternately at predetermined time intervals by raising and holding the pressure in the hydraulic chamber 3, in the high pressure hydraulic channel 5 or alternately raising and releasing the pressure in the hydraulic chamber 3 or high pressure hydraulic channel 5, which works according to the principle of successively pressing the switch in the pen, namely, increasing and pressure retention is the pressure on the switch, and, accordingly, the hydraulic fluid is supplied to the hydraulic chamber 3. Pressure relief or bleeding into the hydraulic skom channel 5 - a return of the switch to its original position.

Hydraulic reusable packer works as follows.

Through the hydraulic channel of the high pressure 5, the high pressure medium with predetermined pressure parameters from the high-pressure pressure device 24 enters the channel or channels 4 and then into the hydraulic chamber 3 (Fig. 1).

When the pressure increases during the flow of the high pressure medium from the hydraulic channel 5 into the hydraulic chamber 3, the volume of the hydraulic chamber 3 with the sealing rings 13 expands, which leads to the movement of the movable element, for example, the piston 9, towards the elastic sealing elements 2.

When squeezing the elastic sealing elements 2, they are squeezed outward with expansion until they come into contact with the inner surface of the production casing (Fig. 4), in which there is a hydraulic reusable packer 23. In the sealed state, the compressed elastic sealing elements 2 separate the under-packer space from the over-packer space and, accordingly, the perforation intervals 29 from 30.

If it is necessary to bring the hydraulic reusable packer 23 into a transport unworked state, it is sufficient to reduce the pressure in the hydraulic channel 5 to the initial pressure, and the elastic sealing elements 2 will return to their initial state.

If during operation of the hydraulic reusable packer 23, the pressure is sharply reduced in the packer region and further pressure reduction in the hydraulic channel 5 is impossible in the usual way, the high-pressure medium in the hydraulic channel 5 is replaced with a lighter fluid, for example oil, by pumping under pressure opening the regulating element 20 in the form of a valve for bleeding.

After replacing the cavity volume of the high-pressure hydraulic channel 5, for example, with oil, the pressure inside the high-pressure hydraulic channel 5 is reduced to atmospheric (or to vacuum), and the elastic sealing elements 2 are placed in the transport position.

Instead of replacing the high-pressure medium in the high-pressure hydraulic channel 5, a return spring 14 is used to restore the initial state of the movable element, for example, the pusher 11, and elastic sealing elements 2.

In addition, to facilitate the return of the movable element, such as the pusher 11, and the elastic sealing elements 2 to their original state, a second additional hydraulic chamber 3 is used, which is formed between the additional hydraulic pair, for example, hydraulic cylinder 8 and plunger 10 (Figs. 4, 5).

Hydraulic reusable packer 23, containing at least two hydraulic chambers 3 formed between movable and fixed elements with different functional features, operates as follows.

In this case, one hydraulic chamber 3 forms a hydraulic pair, for example, in the form of a hydraulic cylinder 8 with a piston 9, and another hydraulic chamber 3 forms a hydraulic pair in the form of a hydraulic cylinder 8 with a plunger 10 (Figs. 4, 5). Both hydraulic chambers 3 are connected through separate channels 4 to two separate hydraulic high pressure channels 5 in the form of a flexible pipe or umbilical. In this case, an increase in pressure in one hydraulic chamber 3 leads to the packing of a hydraulic reusable packer 23, and a change in pressure in another hydraulic chamber 3 is used to return the hydraulic reusable packer 23 to its original transport position, that is, by increasing the pressure between the hydraulic cylinder 8 and the piston 9, elastic the sealing elements 2 are compressed and bulged, and with increasing pressure between the hydraulic cylinder 8 and the plunger 10, the elastic sealing elements 2 return to their original position, and, ootvetstvenno, result in a return hydraulic reusable packer 20 to its original position for transport.

A hydraulic reusable packer 23 with two hydraulic high pressure channels 5 in the form of umbilicals is in a transport state and equipped with a piston 9 with two connecting devices 6 made in the form of sub for connecting to two high pressure hydraulic channels 5; works as follows.

Through one hydraulic channel 5, the high pressure medium in the form of a liquid (Fig. 2) enters through the channels 4 made in the hydraulic cylinder 8 into the hydraulic chamber 3. When the pressure increases during the flow of the high pressure medium from the hydraulic channel 5, the volume of the hydraulic chamber 3 expands , which leads to the movement of the plunger 10 and the pusher 11 toward the elastic sealing elements in the form of rubber cuffs 2. When squeezing the rubber cuffs 2 they are extruded with the expansion of the volume outside to touch Nia with the inner surface of the production string, in which the hydraulic reusable packer 23.

In the sealed state, the elastic sealing elements 2 with squeezed rubber cuffs 2 separate the under-packer space from the overpacker and the upper perforation interval 29 from the lower 30 (Fig. 4). When the pressure in the hydraulic chamber 3 increases to a predetermined value, the round dies 17 advance from the die assembly 19 until they cut into the production string with rigid fixation of the hydraulic reusable packer 23.

When the pressure decreases in the umbilical 5 and, accordingly, in the hydraulic chamber 3, the elastic sealing element 2 and the round dies 17 return to the transport position with the pusher 11 moving to its original state. Holding the set pressure in the umbilical 5, it is possible to hold for a long time, the set pressure in the hydraulic chamber 3 and, accordingly, the elastic sealing element 2 and the round dies 17 in the sealed state.

If necessary, you can temporarily repeatedly unpack the hydraulic reusable packer 23, relieving pressure in the umbilical 5 and, accordingly, in the hydraulic chamber 3.

The hydraulic reusable packer 23 with one hydraulic channel of high pressure 5 in the form of a umbilical is equipped with round 17 and flat 18 dies, as well as an stuffing box with adapter 6 or valve for bleeding 20 to connect channel 4 to umbilical 5; works as follows.

Via umbilical 5, the high-pressure medium in the form of a liquid (Fig. 3) enters through the channels 4 made in the coupling 7 into the hydraulic chamber 3. When the pressure increases, the volume of the hydraulic chamber 3 expands, which leads to the movement of the piston 9 and the pusher 11 to the side elastic sealing elements 2. Further, when the pressure increases to a predetermined position, the pusher 11 is moved, the flat dies 18 are pushed onto the coupling 7 until they are cut into the production string and the round dies 17 are pulled out with rigid fixation of the hydraulic multi the core packer 23 in the production casing. At the same time, there is a squeezing of the rubber cuffs 2, which leads to the expansion of the rubber cuffs 2 outward until it is compressed with the inner surface of the production string, in which there is a hydraulic reusable packer 23.

In the sealed state, a hydraulic reusable packer 23 with squeezed rubber cuffs 2 divides the subpacker space from the overpacker space.

When the pressure decreases in the hydraulic channel 5 and, accordingly, in the hydraulic chamber 3, the elastic sealing element 2 and the round 17 and flat dies 18 return to the transport position, with the pusher 11 moving to its original state. Holding the set pressure in the hydraulic chamber 3, in the hydraulic reusable packer 23, the elastic sealing element 2 and the round 17 and flat 18 dies are sealed in a compressed state.

The hydraulic reusable packer 23 is a reusable packer and therefore, if necessary, it can be unpacked temporarily or kept in the transport starting position by depressurizing the high pressure hydraulic channel 5 and, accordingly, in the hydraulic chamber 3, then packing again, compressing its rubber cuffs 2 by increase in pressure in the hydraulic chamber 3.

The discreteness of movements of the movable elements of the hydraulic reusable packer relative to the stationary elements, due to discrete changes in pressure in the high pressure hydraulic channel and in the hydraulic chamber, allows you to adjust the external flow section between the hydraulic reusable packer and the production casing.

Pump packer installation operates as follows.

The use of a hydraulic reusable packer installed in a well on a tubing 16. The well is either under development, for example, using a swab or fountain production. At the same time, the hydraulic reusable packer 23 is lowered with two hydraulic high pressure channels 5 in the form of a umbilical to the tubing 16 and is installed between the perforation intervals 29 and 30. The high pressure hydraulic channels 5 are connected to the hydraulic cylinder 8 of the packer in the area of the bores 21 with thread through the connecting elements 6 through regulatory elements 20.

From the high-pressure head device 24, the pressure fluid flows through one high-pressure hydraulic channel 5 to the channel 4 and to the upper hydraulic chamber 3. By increasing the pressure in the hydraulic chamber 3, the rubber cuffs 2 are compressed and the over-packer region of the perforation interval 29 is cut off from the under-packer region of the interval perforations 30. In this case, development or fountain production from the lower reservoir 30 is performed. When the pressure in the upper hydraulic chamber 3 is vented and the pressure in the lower hydraulic increases Ameri 3 in real-time will return the reusable hydraulic packer in the transport position and the joint development of both the top 29 and bottom 30 of perforation intervals.

Figure 5 describes the use of a hydraulic reusable packer 23 as part of a pump packer installation. In this case, a hydraulic reusable packer 23 is located on the tubing 16 under the hydraulic pressure pump ESP 15 with electronic control and measuring depth devices 28.

The barrel 1 is made monolithic, with two separately leading hydraulic channels of high pressure 5 and two hydraulic chambers 3. In this case, one hydraulic channel of high pressure 5 is connected to a hydraulic chamber 3 formed between the hydraulic cylinder 8 and the plunger 10, and the other is connected to the hydraulic chamber 3, formed between the barrel 1 and the piston 9. On the other hand, the high pressure hydraulic channels 5 are connected to a pressure head wellhead hydraulic pump 24 or to a deep pump 22.

After the ESP 22 pump is lowered into the well with two high-pressure hydraulic channels 5 and a shank 26, on which a hydraulic reusable packer 23 with a transit channel 4 is installed to pass an additional cable or connect to the control and measuring device 28, the wellhead pressure hydraulic drive is put into operation pump 24. Further, by means of a relay and an actuator regulating the separate supply of a high-pressure medium in the form of a liquid into the high-pressure hydraulic channels 5. In this case, the pop alternately increase and decrease the pressure first in one hydraulic channel of high pressure 5, and then in another, which leads to alternating increase and decrease in pressure, first in one hydraulic chamber 3, and then in another, facilitating reciprocating movements or plunger 10 with pusher 11 or piston 9 with compression or relaxation of the sealing elements 2. That is, sequentially pack and unpack the hydraulic reusable packer 23 in real time with the aim of periodically Sekani language lower reservoir 30 during the simultaneous production of two layers 29 and 30 of single well.

The use of instrumentation 28 installed on the hydraulic reusable packer 23 allows you to determine pressure, temperature, flow, water cut (fluid composition) and other parameters in real time above and / or under the hydraulic reusable packer 23.

Figure 6 describes the operation of the pump packer installation with two hydraulic reusable packers 23. In this case, between the hydraulic reusable packers 23 can be set transport position. Liquid under pressure in the hydraulic channels of high pressure 5 is supplied by a hydraulic pressure pump 24.

First, a reusable hydraulic packer 23 is lowered into the well, to which a high pressure hydraulic channel 5 is screwed in the form of a umbilical. Further on it or above it on the tubing 16 install a deep pump 22, for example SHGN. Then, a second hydraulic reusable packer 23 with a high pressure hydraulic channel 5 in the form of a umbilical is screwed onto the pump 22 or on the tubing above the reception zone 25 of the pump 22 (Fig. 7). After that, the entire arrangement, including two hydraulic reusable packers 23 and a pump 22, is lowered onto the tubing 16 to a predetermined depth, for example, between the intervals of perforation of the strata 29, 30 or the pump 22 is located above the perforation intervals 29 and 30, and the reception zone 25 of the pump 22 is placed between the intervals of perforations 29 and 30.

The pump packer installation works when two hydraulic reusable packers 23 are installed under and above the suction valve of the sucker rod pump 22, that is, above and below the intake zone 25, and located between the perforation intervals 29 and 30. After installing the wellhead 31, the production pump 22 is started and they begin to simultaneously produce fluid from both reservoirs 29 and 30. If it is necessary to determine the water cut of each of the reservoirs 29 or 30, first pressurize the first umbilical 5 to a predetermined pressure and pack the lower a disposable hydraulic packer 23. In this case, the deep UShGN 22 through the inlet valve begins to produce only fluid from the upper formation 29, a sample is taken at the mouth and its water cut is determined.

Then, in the first hydraulic channel of high pressure 5, the pressure is repeatedly pumped up to a predetermined value and, according to the principle of “fountain pen,” the lower reusable hydraulic packer 23 is switched to the unpacking state, in other words, pressed once, turned on and applied pressure to the chamber 3, then pressed, turned off the pressure in the chamber 3, etc., which leads to the return of the lower reusable hydraulic packer 23 to the transport state. USGN 22 begins to select fluid simultaneously from two layers 29 and 30.

In real time, they begin to pump from the mouth, for example, with a wellhead pressure pump 24, into the second umbilical 5, which causes the upper reusable hydraulic packer 23 to operate. After the pressure in the second umbilical 5 has risen by a predetermined amount, the upper reusable hydraulic packer 23 is activated and after packing begins to isolate from the USHGN 22 the upper layer 29, and SHGN 22 begins to work out only the lower layer 30. After taking the wellhead sample, we obtain actual data on the state of waterlogged spans and gas factor of the fluid from the lower reservoir 30.

Multiple packing and unpacking of two reusable hydraulic packers 23 allows the involvement of two reservoirs 29, 30 with the possibility of obtaining on the surface of direct measurements of the composition of the fluid of each reservoir 29 or 30.

On Fig shows the operation of the pump packer unit with a hydraulic reusable packer installed in the well. A reusable hydraulic packer with an electric pump is connected to three high-pressure hydraulic channels 5. In this case, one high-pressure hydraulic channel 5 is connected through a connecting element 20 and a channel 4 in the hydraulic cylinder 8 to a hydraulic chamber 3 formed between the hydraulic cylinder 8 and the plunger 10. This hydraulic channel is high pressure 5 is designed to control the movement of the plunger 10. By increasing the pressure in the hydraulic channel of high pressure 5 act on the plunger 10, which moves e with movable elements (pusher 11, sleeve 12, cuffs 2, flat dies 18) for sealing and compressing the cuffs 2, as well as fixing flat dies 18 on the inner surface of the column.

The second hydraulic channel of high pressure 5 through the connecting element 20 is connected to the channel 4 located in the barrel 1, and through grooves 21 in the barrel 1 is hydraulically connected to the hydraulic chamber 3 under the round dies 17, which are externally held in the pusher 11 by a leaf spring 33. high pressure hydraulic channel 5 is connected to the discharge line of the electric pump 22. When the electric pump is operated due to the high pressure generated on the pump 22, the round rams 17 extend and cut into the inner the stiffness of the column, and when the pump 22 is stopped and the pressure decreases, the round dies 17 under the influence of external pressure and the elasticity of the leaf springs 33 return to their original position.

The third hydraulic channel of high pressure 5 through the connecting element 20 is connected by a channel 4 with two hydraulic chambers 3, inside of which there are pistons 9 with different ratios of diameters and pressure gain. Under the action of a given pressure, the upper piston 9 acts on the plunger 11, which moves and returns the plunger 11 to its original transport position. If necessary, return to the transport position of the flat dies 18 further increase the pressure, which moves the lower piston 9, which returns them to their original state.

The method of operation of the pump packer installation is as follows.

A pump 22, a pipe string 16, hydraulic reusable packers 23 or hydraulic reusable packers 23 located above the reception zone 25 of the pump 22 and / or below the reception zone 25 of the pump 22 are lowered into the well.

After installing the wellhead 31 start the production pump 22 into operation and simultaneously begin to produce fluid from both perforation intervals - formations 29 and 30, for example, with registration of parameters from instrumentation devices 28 suspended on cable 34 (figure 2).

If it is necessary to determine the water cut of each of the layers 29 and 30, pressure is pumped into the first umbilical 5 and cut off with the lower hydraulic reusable packer 23. In this case, only the fluid from the upper layer 29 is started to be extracted by the deep pump 22 (ESP) through the intake zone 25, and the mouth is taken sample and determine the composition of the produced fluid (11).

Then, the pressure in the first hydraulic channel of the high pressure 5 is released and the medium of high pressure is pumped into the second hydraulic channel of the high pressure 5, which leads to the return of the reusable hydraulic packer 23 to the transport state. The ESP pump 22 at the same time begins to take fluid from two layers simultaneously with perforation intervals 29 and 30 (Fig. 9).

For example, in real time, from the wellhead, by connecting to the wellhead, a high-pressure medium is pumped into the third high-pressure hydraulic channel 5, which leads to the actuation and packing of the upper reusable hydraulic packer 23, which cuts off the upper layer 29 from the pump 22, while pump 22 begins to produce fluid only from the lower reservoir 30 (FIG. 10). After the wellhead sample is taken, we obtain actual data on the state of the fluid, for example, water cut and gas factor from the lower reservoir 30.

When bleeding off the pressure in the third high pressure hydraulic channel 5, the lower hydraulic reusable packer 23 returns to its original transport position and we begin to simultaneously operate two layers with perforation intervals 29 and 30 (Fig. 12).

If it is necessary to conduct detailed hydrodynamic studies, you can turn off the pump 22, raise and hold the pressure in the first and third channels to bring both hydraulic reusable packers 23 to the closed state with the cutoff of both layers with perforation intervals 29 and 30 to obtain a pressure recovery curve (Fig. 8 )

Thus, due to the change and holding of pressure alternately in different hydraulic channels of high pressure 5, we alternately and periodically bring into operation reusable hydraulic packers 23. The proposed pump packer installation allows involving two layers with perforation intervals of 29 and 30, s the possibility of real cutoff of one of the layers for actual wellhead measurements of the composition of the produced fluid.

The proposed technical solution allows you to reuse a hydraulic packer in the well, eliminating tripping, increasing the efficiency of the well’s operation by adjusting the pressure in real time in the hydraulic channel by cutting off one or more layers during simultaneous operation, making real measurements, obtaining actual measurements data on the composition of the produced fluid, to achieve maximum total flow rates due to a decrease in hydraulic resistance over by reducing the complexity and intensity of the devices, for example the lack of narrowing devices. Significant discreteness of the movements of the moving elements of the hydraulic reusable packer relative to the stationary elements due to discrete changes in pressure in the high pressure hydraulic channel and in the hydraulic chamber will allow controlling the external flow section between the hydraulic reusable packer and the production casing.

Hydraulic reusable packer provides reliable operation and allows you to use it in the well many times, without performing hoisting operations; to increase the efficiency of well operation by regulating the pressure in real time in the high pressure hydraulic channel, it is possible to cut off one or several layers in real time while simultaneously operating several layers; carry out separate control measurements of the composition of the fluid produced, for example, from the upper production facility — the formation, the perforation interval, and the leakage interval; reduce hydraulic loss (resistance) when it is used in the well due to the lack of narrowing and fitting devices, which will increase the total production rate of the well.

A pump packer installation using a hydraulic reusable packer, for example, above and below the pump, will increase the efficiency of monitoring the nature of the inflow and the water content of each formation and the well as a whole. When the pump is completely cut off from the perforation intervals, it is possible to conduct a study of the tightness of the packer installation by the telemetric system (TMS) by the nature of the pressure change, as well as hydrodynamic study of the formations by the pressure recovery curve (HPC). In addition, when bringing one of the hydraulic reusable packers into the transport position, they can selectively engage a given formation selectively in the development with minimal hydraulic resistances and directly measure water cut when sampling at the wellhead.

The operating method of the pump packer installation provides for the regulation of pump operation simultaneously or alternately of two layers with the possibility of cutting off the upper or lower layers from the pump in order to increase the total flow rate of the well, provides for the regulation of pump operation at the same time or in turn of two layers with the possibility of cutting off the upper or lower or both layers from the pump in order to carry out control measurements of water cut, gas factor and other parameters during the actual sampling of head samples of produced fluid.

Claims (22)

1. Hydraulic reusable packer comprising a barrel, at least one elastic sealing element, at least one hydraulic chamber located between the movable and fixed elements of the packer, a channel or channels connected to the hydraulic chamber, characterized in that it is additionally provided at least one high pressure hydraulic channel, made in the form of a tubular element of constant or variable cross section and hermetically connected by means of a connecting device or a threaded connection with movable and / or stationary elements of the packer, which are made with the channel or channels. 2. The hydraulic reusable packer according to claim 1, characterized in that the tubular element of constant or variable cross-section is a load-bearing armored umbilical, equipped with at least one tube, one conductive core. 3. The hydraulic reusable packer according to claim 1, characterized in that the connecting device is a sleeve. 4. The hydraulic reusable packer according to claim 1, characterized in that the connecting device is a sub. 5. The hydraulic reusable packer according to claim 1, characterized in that the connecting device is a stuffing box. 6. The hydraulic reusable packer according to claim 1, characterized in that the connecting device is a fitting in the form of a constricting element. 7. The hydraulic reusable packer according to claim 1, characterized in that the movable elements are made in the form of a piston or plunger. 8. The hydraulic reusable packer according to claim 1, characterized in that the movable elements are made in the form of a pusher or sleeve. 9. The hydraulic reusable packer according to claim 1, characterized in that through holes for transit passage of the cable and / or tubular element are made inside the movable and / or fixed elements. 10. The hydraulic reusable packer according to claim 1, characterized in that the barrel is hollow or monolithic. 11. The hydraulic reusable packer according to claim 1, characterized in that it is further provided with at least one return spring located between the movable and fixed elements. 12. The hydraulic reusable packer according to claim 1, characterized in that it is further provided with at least one control device located in the high pressure hydraulic channel and / or in the channel or channels. 13. The hydraulic reusable packer according to claim 1, characterized in that it is further provided with round and / or flat dies. 14. The hydraulic reusable packer according to claim 1, characterized in that it is further provided with o-rings with elastic and sealing properties, separating the movable and / or fixed elements between them. 15. A pump packer installation comprising a pump lowered into a well on a pipe string and at least one hydraulic reusable packer, a high-pressure head device, hermetically connected by means of a high pressure hydraulic channel to a hydraulic reusable packer located above the pump intake zone or below the pump intake area. 16. Pump packer installation according to clause 15, wherein the hydraulic reusable packer is located on the tubing above the pump or on the liner under the pump at a predetermined distance. 17. The pump packer installation according to clause 15, wherein the pump is located above the hydraulic reusable packer or hydraulic reusable packers, and the pump receiving area is located between the hydraulic reusable packers. 18. Pump packer installation according to clause 15, wherein the pump is a sucker rod pump or an electric centrifugal pump with or without a casing. 19. The pump packer installation according to clause 15, wherein the high-pressure head device is a pressure or production pump and / or high-pressure head line in the form of a pressure tank or pressure pipe with a high pressure medium. 20. The pump installation according to clause 15, wherein the pressure pipe with a high pressure medium is a tubular element of constant or variable cross-section. 21. Pump packer installation according to clause 15, characterized in that it further includes at least one control and measuring device. 22. A method of operating a pump packer installation, including lowering a pump, pipe string, a hydraulic reusable packer or hydraulic reusable packers into the well, wherein the pump receiving area from the perforation and / or leakage intervals is cut off with a hydraulic reusable packer or hydraulic reusable packers and the cutting is performed simultaneously or alternately at given intervals.

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