Device for oil recovery intensification

FIELD: oil and gas industry.

SUBSTANCE: invention refers to the oil and gas industry and can be used in particular to prolong anhydrous operation conditions of oil producers. The substance of the invention: a device comprises a pipe string lowered into a well, a packer with a sealing member and a flow shutdown mounted therein; a hollow body comprises a pipe concentric with its axis. From above, this pipe is rigidly connected to the pipe string, and from below - to a piston. The pipe and piston are axially movable in relation to the hollow body from the flow shutdown. The hollow body from the flow shutdown is blind off from below; its holes are inclined at 120° to each other in three vertical planes along the perimeter of the hollow body. The first vertical plane comprises two holes above and below the sealing element of the packer, respectively. One hole is formed in the second vertical plane below the sealing element of the packer. The third vertical plane has one hole above the sealing element of the packer. The piston has a slot configured to provide an alternative connection of the holes of the vertical planes to the pipe inside when the pipe string and piston move axially and rotate about the hollow body of the flow shutdown. The hollow body of the flow shutdown is provided with an outer long slot inside from below, while the piston at the bottom has three inner long grooves inclined at 120° to each other along the perimeter; the outer long slot of the hollow body of the flow shutdown can be fixed in any of the three inner long grooves of the piston.

EFFECT: simplifying the operational structure of the device, improving its reliability and enhancing the same.

3 dwg

 

The invention relates to the oil and gas industry and can be used, in particular, to prolong waterless operation of oil wells.

A device for intensification of oil production (patent RF №2282715, IPC E21B 43/14, publ. 27.08.2006, bull. No. 24), including the packer with the installed deactivation switch flow, which is made in the form of a hollow casing with holes located above and below the sealing element of the packer, and inside the housing concentric with its axis is the tube that its lower part is connected to the housing, and the upper part of the outer surface cooperates with the annular sleeve, with the possibility of axial movement and provided with o-ring seal and shear pins, locking her in the body, which when moved down, after removing the pins, covers the holes in the housing located above the sealing element of the packer, thus disabling the flow of holes below the sealing element of the packer.

The disadvantages of this device are:

- first, low functionality deactivation switch thread, as it allows you to disable the flow of fluid only from the bottom hole and you cannot disable the flow of fluid from the upper holes (when irrigation wells on the top);

- secondly, the low efficiency is the efficiency of the work, related to the fact that the admission of water from above it is impossible to prolong waterless operation of oil wells;

- thirdly, the complexity of the design work related to the fact that off the bottom of the hole you want to retrieve the downhole pump from the well, and any known method (for example, involving geophysical lift or pump unit) to move the annular sleeve down stream and off stream out of the holes below the sealing element of the packer;

- fourthly, limited functionality, so the device can be operated only with a sucker rod pump, because during well operation centrifugal or screw pump, it is impossible to set the ball on the ring nut and move it down by excessive pressure in the string of pipe as the pump is placed above the device.

- fifth, removing the pump from the well, the attraction of geophysical lift or pump unit for moving an annular sleeve down causes high material (process fluid, the bulb) and financial expenses in the operation.

The closest in technical essence is the device for well operation and shutdown of the flooded part of the layer (patent RF №2422422, IPC E21B 43/00, publ. 20.07.2011, bull. No. 20), including spouse the ing in the well column pipe, the packer with the installed deactivation switch flow, which is made in the form of a hollow body with openings located above the sealing element of the packer, and inside the housing concentric with its axis located pipe, an annular sleeve with shear pins, with the possibility of axial movement after cutting pins, o-rings, the pipe is rigidly connected with the column pipe, and the outside is provided with a piston fixed in the housing destructible elements, with the tube with the piston after cutting destructible items have the possibility of axial movement downward relative to the body retrofitted flow and sealed overlapping holes of the housing above the sealing element of the packer, also the pipe is provided with the upper row of holes communicating with the holes in the hull above the sealing element of the packer and the lower number of holes communicating with podplacenym space well, and the annular sleeve fixed shear pins inside the pipe above the upper row of holes, and the top is equipped with a saddle under discharged from the mouth into the string of pipe ball when cutting the pins annular sleeve has the ability to move down and sealed overlapping the lower row of holes in the pipe, thus disabling the flow of pedacinho space well.

The disadvantages of this device is the ETS are:

- first, low reliability associated with the presence of destructive elements, the locking piston in the casing structure of the device, srezalsya at rated load, and the impossibility of creating a design load (inclined shaft, removal of the packer when unloading the pipe string to the device) and/or errors in the determination of the diameter of destructive elements can lead to failure of the device in operation;

- secondly, the complexity of the design work related to the fact that off the bottom of the hole you want to retrieve the downhole pump from the well, to lose the ball in a string of pipe, to create the necessary pressure raising pump unit for cutting the pins annular sleeve and move it down and overlapping the lower row of holes in the pipe;

- thirdly, removing the downhole pump from the well, the attraction of the pumping unit, tank trucks to move the annular sleeve down causes high material (process fluid, the bulb) and financial expenses;

- fourthly, limited functionality, so the device can be operated only with a sucker rod pump, because during well operation centrifugal or screw pump, it is impossible to set the ball on the ring nut and move it down the creation and bytchkova pressure in the string of pipe, since the pump is placed above the device.

An object of the invention is to simplify the design of the device and improving the reliability of his work, as well as the reduction of material and financial costs when using your device and expand its functionality.

The technical problem is solved by a device for intensification of oil production, including lowered into the well column pipe, a packer sealing element and the installed deactivation switch flow, which is made in the form of a hollow casing with holes inside the hollow casing concentric with its axis located pipe, top rigidly connected with the column pipe and the lower piston, the tube with the piston have the possibility of axial movement relative to the hollow body deactivation switch thread o-ring seal.

What's new is that the hollow body of the deactivation switch flow muted bottom and the holes in it are at an angle of 120° between them in three vertical planes along the perimeter of the hollow body, and in the first vertical plane made two holes located respectively above and below the sealing element of the packer, the second vertical plane below the sealing element of the packer made one hole, in a third vertical plane above the sealing element of the packer made one hole, when this plunger is equipped with a cutout, alternately telling the holes vertical planes with the inner space of the pipe under axial and rotational movement of the pipe string with the piston relative to the hollow body deactivation switch flow, and the hollow body of the deactivation switch flow inside bottom provided with an outer longitudinal groove, and a piston in the lower part is equipped with three internal longitudinal grooves, arranged at an angle of 120° between them along the perimeter, with the hollow body of the deactivation switch flow to its outer longitudinal groove has the ability to commit in any of the three internal longitudinal grooves of the piston.

In Fig. 1 schematically illustrates the device in longitudinal section.

In Fig. 2 shows a section a-a of the device.

In Fig. 3 shows a section b-B of the device.

Device for intensification of oil production includes lowered into the well 1 (see Fig.1) the string of pipe 2, the retainer 3 with the sealing element and the installed deactivation switch thread 4, which is made in the form of a hollow casing 5 with holes 6, 7, 8, 9, communicating respectively with nadakarni 10 and podplacenym 11 spaces wells 1. Inside the hollow body 5 concentric with its axis located in the pipe 12, rigidly connected with the column tube 2.

The top tube 12 is rigidly connected with the column tube 2, and the bottom tube 12 is rigidly connected to the at with the piston 13. The pipe 12 with the piston 13 have the possibility of axial movement relative to the hollow body 5 deactivation switch flow 4.

The hollow body 5 deactivation switch flow 4 plugged at the bottom, and holes 6, 7, 8, 9 (see Fig.1 and 2) are positioned at an angle of 120° between them in three vertical planes 14', 14", 14"' on the perimeter of the hollow body 5. For example, the holes 6, 7, 8, 9 in the hollow body 5 deactivation switch flow 4 perform diameter 25 mm

In the first vertical plane 14' made two holes 6 and 7, located respectively above and below the sealing element of the packer 3, the second vertical plane 14 'below the sealing element of the packer 3 is made one hole 8, and the third vertical plane 14"' above the sealing element of the packer 3 is made one hole 9.

The piston 13 is equipped with a notch 15 (see Fig.2), for example, made in the form of a segment width, the larger the diameter of the holes 6, 7, 8, 9 (see Fig.1), equal to 25 mm, the hollow body 5 deactivation switch flow 4, for example, have a width and the notch 15 is: a=35 mm

Notch 15 (see Fig.1 and 2) of the piston 13 in turn informs the holes (6 and 7), (8), (9) the corresponding vertical planes 14', 14", 14", with an internal space 16 of the pipe 12 in the axial and rotational movement of the pipe string 2 with the piston 13 relative to the hollow body 5 deactivation switch flow 4.

The hollow body 5 off the El flow 4 inside bottom provided with an outer longitudinal groove 17, for example, a length equal to: b=0.3 m (see Fig.1). The piston 13 in the lower part is equipped with three internal longitudinal grooves 18', 18", 18" (see Fig.1 and 3) positioned at the angle of 120° between them along the perimeter of the piston 13 length c=0.4 m

The hollow body 5 deactivation switch flow 4 with their outer longitudinal groove 17 has the ability to commit in any of the three internal longitudinal grooves 18', 18", 18" piston 13.

Width - e outer longitudinal groove 17 of the hollow body 5 deactivation switch thread 4 (see Fig.3) less than the width f of each of the three internal longitudinal grooves 18', 18", 18", made in the piston 13, for example, the width of the axial groove 17: e=6 mm, and the width f of each of the three internal longitudinal grooves 18', 18", 18"': f=10 mm, i.e., (e<f).

Unauthorized overflows of liquid are eliminated o-ring seal 19.

Device for intensification of oil production is as follows.

The device on the string of pipe 2 (see Fig.1) is lowered into the borehole 1, while in the process of lowering the tubing 2 into the well it above proposed device equipped with a pump (Fig.1, 2, 3 not shown) of any known construction, for example, ESP. Produce planting packer 3 (see Fig.1) between the top and bottom of the perforation intervals (Fig.1, 2, 3 not shown) of the productive formation.

Install the device in an initial position (see Fig.1, 2 and 3), h is Oba notch 15 of the piston 13 toward the holes 6 and 7 the vertical plane 14', when this outer longitudinal groove 17 of the hollow body 5 deactivation switch flow 4 must be in the inner longitudinal groove 18' of the piston 13.

Production from well 1 (see Fig.1) enters the device from the bottom of the perforations of the productive formation (Fig.1, 2, 3 not shown), that is, from pedacinho space 11 (see Fig.1) wells 1 through the opening 6 of the hollow body 5 deactivation switch flow 4, the notch 15 of the piston 13 in the inner space 16 of the pipe 12, and from the upper zone of perforation of the productive formation (Fig.1, 2, 3 not shown), that is, from nadakarni space 10 (see Fig.1) wells 1 through the opening 7 of the hollow body 5 deactivation switch flow 4, the notch 15 of the piston 13 in the inner space 16 of the pipe 12.

In the inner space 16 of the pipe 12 products from nadakarni 10 and pedacinho 11 spaces are mixed and supplied to the column tube 2 for receiving the downhole pump (Fig.1, 2, 3 not shown), which moves the products to the surface. During operation of the well 1 (see Fig.1) is watering products, and watering products can occur both in the upper part of the productive formation (nadakarni space 10 above the sealing element of the packer 3), for example, due to cross-flows, and in the lower part of the productive formation (podvecerni the space 11 below the sealing element is of Acera 3, for example, due to the pull of the water cone to the lower perforations.

With the advent of water in wells, as evidenced by increased production watercut is off the top (nadakarni space 10 well 1) or lower (pedacinho space 11 well 1) water-saturated part of the formation.

To disable the lower water-saturated part of the reservoir from the initial position from the wellhead to pull the string of pipe 2 and is rigidly connected with it by a pipe 12 with the piston 13 to a length greater length b=0.3 m, for example at a length of 0.5 m, while the outer longitudinal groove 17 of the hollow body 5 deactivation switch thread 4 (see Fig.1 and 2) extends from the inner longitudinal grooves 18' of the piston 13.

Then turn the string of pipe 2 with the mouth counterclockwise by an angle equal to 120°, while the cutout 15 of the piston 13 is placed opposite the opening 9, is made above the sealing element of the packer 3 in a third vertical plane 14"', then the string of pipe 2 and is rigidly connected with it by a pipe 12 with the piston 13 is lowered down, with the outer longitudinal groove 17 of the hollow body 5 deactivation switch stream 4 enters into the internal longitudinal groove 18"' of the piston 13 (see Fig.1, 2 and 3), since (e<f) and the piston 13 moves downward relative to the hollow body 5 deactivation switch thread 4 to stop in muted bottom of the hollow casing is 5 deactivation switch flow 4. As a result, the product flow from the lower water-bearing zone of the formation, i.e. pedacinho 11 space well, disabled.

Next, the flow of production comes only from the top of the perforations on the top (non-irrigated zones of the reservoir, i.e. from nadakarni space 10 wells 1 through the opening 9 of the hollow body 5 deactivation switch flow 4 notch 15 of the piston 13 in the inner space 16 of the pipe 12, where the products of the string of pipe 2 is supplied to the reception of the downhole pump (Fig.1, 2, 3 not shown).

Thus, there is the flow is shut off production from the lower zone of the reservoir, which was bodnaras, and the product is extracted only from the upper non-irrigated zones of the formation.

To disable the upper water-saturated part of the reservoir to the wellhead from the initial position to pull the string of pipe 2 (see Fig.1 and 3) and rigidly connected with it by a pipe 12 with the piston 13 to a length greater length b=0.3 m, for example at a length of 0.5 m, while the outer longitudinal groove 17 of the hollow body 5 deactivation switch thread 4 extends from the inner longitudinal grooves 18' of the piston 13.

Then turn the string of pipe 2 with the mouth clockwise by an angle equal to 120°, while the cutout 15 of the piston 13 is placed opposite the hole 8 made above the sealing element of the packer 3 in the second vertical plane 14", then the string of pipe 2i rigidly connected with it by a pipe 12 with the piston 13 is lowered down, when this outer longitudinal groove 17 of the hollow body 5 deactivation switch stream 4 enters into the internal longitudinal groove 18" cylinder 13 (see Fig.1, 2 and 3), since (e<f) and the piston 13 moves downward relative to the hollow body 5 deactivation switch thread 4 to stop in muted from the bottom of the hollow body 5 deactivation switch flow 4.

As a result, the product flow from the upper water-bearing zone of the formation, i.e. nadakarni space 10 wells is disabled.

Next, the flow of production comes only from the bottom of the perforations (lower non-irrigated zones of the reservoir, i.e. from pedacinho space 11 wells 1 through the opening 8 of the hollow body 5 deactivation switch flow 4, the notch 15 of the piston 13 in the inner space 16 of the pipe 12, where the products of the string of pipe 2 is supplied to the reception of the downhole pump (Fig.1, 2, 3 not shown).

Thus, there is a power flow of products produced from the upper zone of the reservoir, which was bodnaras, and the product is extracted only from the lower non-irrigated zones of the formation.

The proposed device for intensification of oil production has a simple design in the work, so as to turn off the holes of the device below the sealing element of the packer excluded removing the downhole pump from the well, avoiding the involvement of additional equipment (pumping units, tank trucks the process fluid) and equipment (ball) to turn off the flow of fluid from pedacinho space (bottom of perforation interval) wells, and this reduces material and financial costs in the operation of the device, and by eliminating destructive elements, srezalsya at rated load, from the design of the device when off fluid flow from nadakarni space (top of perforation interval) wells increases the reliability of the device operation.

In addition, the proposed device for intensification of oil production allows you to extend the functionality, so the device can be operated with any type of pump, and switching the flow of products from the top and bottom of perforation interval is axial and rotational movement of the pipe string from the wellhead.

Device for intensification of oil production, including lowered into the well column pipe, a packer sealing element and the installed deactivation switch flow, which is made in the form of a hollow casing with holes inside the hollow casing concentric with its axis located pipe, top rigidly connected with the column pipe and the lower piston, the tube with the piston have the possibility of axial movement relative to the hollow body deactivation switch thread o-ring seal, characterized in that the hollow body of the deactivation switch flow muted bottom, and the holes in it are at an angle of 120° between them in three vertical p is okoth around the perimeter of the hollow body, and in the first vertical plane made two holes located respectively above and below the sealing element of the packer, the second vertical plane below the sealing element of the packer made one hole, in a third vertical plane above the sealing element of the packer made one hole, when this plunger features a sweetheart neckline with alternate messages hole vertical planes with the inner space of the pipe under axial and rotational movement of the pipe string with the piston relative to the hollow body deactivation switch flow, and the hollow body of the deactivation switch flow inside bottom provided with an outer longitudinal groove, and a piston in the lower part is equipped with three internal longitudinal grooves, arranged at an angle of 120° between them along the perimeter, with the hollow body of the deactivation switch flow to its outer longitudinal groove has the ability to commit in any of the three internal longitudinal grooves of the piston.



 

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6 cl, 2 dwg, 1 ex

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes measuring volume and denseness of fresh oil in reservoir in case of even or balanced temperature and pressure. Combined sample of fresh oil is taken from pipeline during its draining and denseness of oil and bed water and ballast content is determined. Then mass of drained oil is determined with consideration of measured parameters. Prior to draining, fresh oil from reservoir is exposed until partial separation of bed water, and its denseness is measured. During draining of fresh oil, its denseness,, volumetric share of water therein, pressure and temperature are determined. Drained oil mass and percentage of ballast is determined from given mathematical expressions. Denseness of exposed bed water is measured on basis of sample, taken after exposure of fresh oil in reservoir. Denseness of exposed bed water is measured in its flow during draining from reservoir after exposure and before draining fresh oil. Volume of fresh oil in reservoir is measured continuously by its level and data from graduating table for reservoir. Draining of combined sample of fresh oil from pipeline during its draining is performed manually or automatically in case of constant kinetic condition. After exposure of fresh oil in reservoir point samples of fresh oil are taken, additional combined sample is made thereof and denseness of fresh oil, oil and bed water and ballast percentage is determined from it, and these parameters are used when evaluating precision of determining parameters of drained oil. Measurements of denseness, volumetric water share, pressure and temperature during draining of fresh oil in flow are performed periodically with averaging of current values of measured parameters for time interval, equal to period of change of parameters of fresh oil in reservoir. Mass of bed water MW is determined from given formula.

EFFECT: higher precision.

8 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: method includes compressing gas at compressor station to required feed pressure, and utilization of drop liquid, containing drops of compressor oil and gas, before gas-distributing substation with following pumping of gas into well. Utilization of drop liquid is performed via slanted cylindrical separator of centrifugal type and deep chemical cleaning block in form of two parallel-placed absorbers, operating alternately with replacement of processed absorbents. Separator and two absorbers are mounted at tank for collecting compressor oil.

EFFECT: higher efficiency.

2 dwg, 1 tbl

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes transporting hydrocarbon product along operation channel. Control of pressure changes along this channel is performed. If such change is present such debit of hydrocarbon product is set, which provides for destruction or decomposition of present natural gas hydrates and/or prevention of their forming. With this debit, to place of hydrates decomposition and/or prevention of their forming, alkali solution is fed with concentration 0.04-4.9% with "pH" greater than 10. Alkali solution is fed during time not less than time of pressure change along operation channel, as well as with flow and during time until achieving mass concentration of alkali in gas phase 10-15% of mass.

EFFECT: higher efficiency.

12 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes full raising of cement in behind-pipe space up to mouth, sectioning wells by electro-isolating compounds from oil transporting system or bed pressure support system and use of cathode protection plant as cathode protection station with current controller. For each well time needed for completing cathode polarization of well is determined as well as time for well depolarization, during which potentials on well of cluster are lowered to minimal protective values. On each cluster well cyclic mode of cathode protection plant is performed: cathode polarization during completion of cathode well polarization and well depolarization during lowering potential on well to minimal protective values. During depolarization of one well cathode polarization of other cluster well is performed.

EFFECT: higher effectiveness.

1 ex

FIELD: oil and gas extractive industry.

SUBSTANCE: device has axial transmission and soft stripe support system. Axis connects electric engine to reducer and connected reducer and leading hub, by means of which transmission lines are actuated. After connection of driven hub and device for supporting pump bars, pump bar for actuating well oil pump can be connected. Leading hub can actuate transmission lines, including one connected to balancer, operating synchronously to operation of well oil pump in both directions. Also, device has base, corbel and platform, controller for controlling oil extraction process, transformer, frequency setting transformer, absolute values encoding means and braking tank. Said electric engine, reducer and leading and driven hubs are mounted on the platform. Controller, through setting frequency generator, functioning as main drive, is connected to electric engine. Controller is connected to encoding absolute values means, capable of displaying working conditions and receiving data about position and rotation angle of leading hub. Encoding means for absolute values and braking block compose a portion of device for determining movement and braking. Controller can contain central processing module, input/output module and liquid-crystal display. Controller can be connected to encoding extension means, immediately receiving data about angle, position and rotation speed of electric engine axis.

EFFECT: higher efficiency.

3 cl, 12 dwg, 1 ex

FIELD: oil-producing industry.

SUBSTANCE: the invention presents a method of purification of the underground potable water at a crude production. The method provides for limitation of traffic of pollutions by construction of boreholes and pumping in of solutions of reagents. Along the contour of the site of possible pollution they make a net of boreholes with the a controlled inter-pipe and drill string-borehole annulue space - a compound - boreholes, the distance between which and a number of steps is chosen depending on porosity and permeability of rocks. The steps of the compound-boreholes are placed perpendicularly to the traffic route of the natural stream of the underground potable water, and a pumping in of the solutions of reagents is made through annulue space and inter-pipe space of compounds - holes simultaneously with a crude and a gas production from a pay. The technical result is a reliable provision of purification of underground potable water at simultaneous production of a crude and a gas.

EFFECT: the invention ensures a reliable provision of purification of underground potable water at simultaneous production of a crude and a gas.

1 dwg

FIELD: gas extractive industry.

SUBSTANCE: method includes extraction of resource by mechanical drilling and extraction of slurry and rock pieces through well. Gas extraction is performed by horizontal drilling with washing and back expansion, with concurrent cleaning and separation of fresh extracted mixture and accumulation of gas. Delivery of expander of ultra-large working size to expansion place is performed through well subjected for backward expansion. Pressure, temperature and composition of washing liquid is adjusted in such a way, that free natural gas, freed during mechanical drilling, was dissolved in drilling mud and separated from it only after passing of separator through rotating preventer. Expander in form of rocker with cutters is used, expanding well diameter up to ten meters and more.

EFFECT: higher efficiency.

2 cl, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: method includes insertion of compound of foam-forming and gas-forming substances, dissolving these in bed water, and forming of gas and foam and replacement of well liquid with foam, while as foam-forming substance sulphonole is used with sulphamine acid as reaction initiator. Liquid is extracted in two stages: at first stage upper portion of liquid column is piston-effected, at second stage water-soluble foam-forming substance is injected into well with foam stabilizer and reaction initiator, as well as gas-forming substance, while water-soluble foam-forming and gas-forming substances are inserted into well directly after piston-effecting, and water-soluble foam-forming substance additionally has surfactants. Mass of foam-forming substance is determined from conditions: Mff=(0.005-0.01)KMw, where K - component coefficient, Mw - mass of water removed from the well. As gas-forming substance, ammonium carbonate is used in amount 40-50 kg for 100 linear meters of water column in a well. Piston-effecting is performed with productiveness in no less than two times greater than well debit.

EFFECT: higher efficiency.

4 cl, 1 ex, 2 dwg

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