Device for dosed supply of a chemical reagent into the well

 

The invention relates to the oil and gas industry, in particular, to a device for drilling wells from oil deposits, corrosion products, etc., using a chemical reagent. The device includes a dispenser, hydraulically connected with the capacity for chemical reagent and a discharge line chemical reagent into the well, the exhaust valve, the actuator of the dispenser, kinematically associated with the dispenser. The dispenser is made in the form of a plunger pump with suction and discharge. Camera suction pipe communicated with the reservoir for chemical reagent, and the Plenum chamber with the discharge line of chemical into the well. The actuator of the dispenser is made in the form of a hinge mounted on the front of hydropushers with electric drive and control unit. The kinematic connection of the actuator and dispenser carried out through two shoulders lever - spring stop mounted on the rack. The rod hydropushers pivotally connected with one arm of the lever, the end of the second arm through which a fixed roller is in conjunction with placed in a glass of spring-loaded stop. Two shoulders lever placed at the front for the e axis located on one straight line. The discharge line of the chemical reagent in the hole made in the form of a flexible armored capillary tube and attached to the outer surface of tubing. The exhaust valve is placed on the tube in the reception area of the downhole pump. Increased reliability and simplified regulation reagent supply, provides the versatility to handle different wells. 2 C.p. f-crystals, 2 Il.

The invention relates to the oil and gas industry, in particular, to a device for dosed supply of the chemical reagent into the well to prevent and remove asphaltoresinparaffin deposits (ARPD), corrosion products, demulsification well.

A device for feeding chemical into a well containing a dispenser in the form of a plunger pump, hydraulically connected with the capacity for chemical reagent and a discharge line chemical reagent into the well in the form of a flexible hose provided with a column of hollow rods, return and exhaust valves and the actuator of the dispenser in the form of a walking beam pumping unit (see ed.mon. The USSR №1837101, CL E 21 In 37/06, 1991).

The disadvantage of this device is that the supply of reagent is aetsa speed reducer of the pumping unit. As a consequence of short duration (pulsating) by time interaction of chemical sediments in the well, which requires a large consumption of chemical reagent and a longer duration of exposure to a chemical reagent to ensure complete removal of the products of the chemical reagent in the well. Moreover, in this device the execution of the discharge line chemical reagent into the well in the form of a flexible hose, not protected from aggressive external environment, is possible only by placing it in the column of hollow rods, which reduces the reliability of the discharge line and limits the scope of application of the device.

Know another device for feeding chemical into a well containing a reservoir for chemical reagent, mounted on the valve bore dispenser in the form of a plunger pump with the discharge line of the chemical reagent into the well (see RF patent №2142553, CL E 21 In 37/06, 1995). Regulation of the supply of the chemical reagent into the well by changing the diameter of the plunger of a plunger pump and by adjustment of the adjustable stop.

A disadvantage of the known devices is the difficulty of controlling the feed of a chemical reagent into the well, since for each n the banking entity to the present invention is a device for supplying a chemical reagent into the well, contains pump, hydraulically connected with the capacity for chemical reagent and a discharge line chemical reagent into the well, reported with a column of hollow rods, exhaust valve and actuator of the dispenser, made in the form of gear kinematically associated with the dispenser and drive submersible pump, the dispenser is made in the form of a vane pump, which is mounted on the side of the gearbox (see RF patent №2171364, CL E 21 In 37/06, 2000).

When the rotor vane pump occurs a periodic change of its working chambers; is the absorption of chemical from the container into each camera and wipe it under pressure through the discharge line into the Elevator column wells are metered and constantly, where it interacts with the deposits on the tubes. Regulation of the supply of the chemical reagent in the wells in a plate pump by changing the distance between the axes of symmetry (eccentricity) of the rotor and stator vane pump.

Although the known device provides a continuous flow of chemical into the well, and the design of the dispenser in the form of a vane pump allows you to adjust the flow of chemical into the well, but the m eccentricity of the rotor and stator vane pump, that requires a readjustment of the dispenser when the requirements change quantity, chemical reagent, etc.,

In addition, at this setting the dispenser unreliable works to supply small amounts of a chemical reagent due to the failure of the valves in the chambers of the dispenser.

The technical task to be solved by the invention is the simplification of the regulatory filing of the chemical reagent, increase reliability, flow control, ensuring simplicity, reliability and versatility of the device for processing various wells or holding different treatments in one well by regulating the feed rate change movement of the plunger of a plunger pump at a constant injection volume for one swing of a plunger pump.

This technical problem is solved due to the fact that in the known device for feeding chemical into the well containing the pump, hydraulically connected with the capacity for chemical reagent and a discharge line chemical reagent into the well communicated with the bore, an exhaust valve and actuator of the dispenser, kinematically associated with the dispenser, it is new that the dispenser is made in the form of a plunger pump with a second reagent, and the Plenum chamber with the discharge line of the chemical reagent into the well, the actuator of the dispenser is made in the form of a hinge mounted on the front of hydropushers with electric drive and control unit, and the kinematic connection of the actuator and dispenser carried out through two shoulders lever - spring stop fixed on a stand, with the rod hydropushers pivotally connected with one arm of the lever, the end of the second arm through which a fixed roller is in conjunction with placed in a glass of spring-loaded stops, and two shoulders lever placed on the rack can be rotated, in this case a plunger pump and glass hosts spring stop fixed on the rack in such a way that their longitudinal axes are located on one straight line, while the line pressure chemical reagent into a well made in the form of a flexible armored capillary tube and attached to the outer surface of tubing and the outlet valve is placed on the tube in the reception area of the downhole pump.

Plunger pump can be made in the form of a plunger cylinder.

The control unit of hydropushers includes a frequency generator W feed chemical into the well, since it has become possible to arrange the kinematic connection of the plunger piston-driven pump dispenser so that the regulation of the supply of the chemical reagent into the well is not in the plunger pump, and changing regimes in the actuator of the dispenser. This allowed the regulation of the supply of the chemical reagent into the well to perform a frequency change of the movement of the plunger of a plunger pump at a constant injection volume of chemical reagent per stroke of the plunger, which ensures the dispensing of the desired amount of chemical reagent to the wells.

The implementation of the actuator of the dispenser in the form of hydropushers with an electric drive, the spindle of which is kinematically connected with the plunger of a plunger pump, namely the implementation of kinematic relations in the form of two shoulders of the lever, the end of one shoulder which interacts via a spring-loaded stop with the plunger of a plunger pump, and the other lever arm pivotally connected with the rod of hydropushers, allows you to change the number of swings of a plunger pump and thereby to simplify the regulation of feeding chemical into the well.

The execution of the dispenser, the actuator of the dispenser in the form of independent nodes makes it possible is the drive increases the reliability of the flow due to the absence of mechanical components in it.

Due to the fact that as the discharge line of the chemical reagent into the well using a flexible armored capillary tube, the opportunity to place the discharge line in well anywhere, including to place and secure it to the outer surface of the downhole pipe and end it with the exhaust valve to be placed at any depth in the reception area of the downhole pump, and the discharge line provides the desired pressure of the pumped fluid; such a pipeline convenient and reliable transportation.

Device for feeding chemical into the well depicted in the drawings, where Fig.1 presents a General view of the device in the well; Fig.2 is a structural embodiment of the device.

The device includes a dispenser 1, the actuator 2 of the dispenser, kinematically associated with the dispenser 1, the tank 3 for the chemical reagent and the discharge line 4 chemical reagent into the well with the valve 5 is input in the wellhead equipment and the exhaust valve 6.

The dispenser 1 is made in the form of a plunger pump, in particular in the form of a plunger of a hydraulic cylinder containing hydraulic cylinder 7, which houses the plunger 8. To the cylinder 7 by a nut 9 is fixed hydraulic part that Soderini with a capacity of 3, and the camera 11 with the discharge line 4 chemical reagent into the well.

The actuator 2 of the dispenser 1 is made in the form of hydropushers 13 with the rod 14 and an electric actuator (not shown). The rod 14 of hydropushers 13 kinematically connected with the plunger 8 plunger pump through a system of two shoulders lever 15 stop 16, spring-loaded by a spring 17. Two shoulders lever 15 is placed on the rack 18 can be rotated about the axis 19. One shoulder 20 of the lever 15 is connected hinge axis 21) with the rod 14 of hydropushers 13. On the other end of the shoulder 22 on the axis 23 mounted movable roller 24, which when the device is in interaction with the spring loaded stop 16. To avoid distortion of the plunger 8 plunger pump and ensure accurate dosing of chemical reagent spring stop 16 is placed in the Cup 25, and the casing is a plunger pump and a glass of 25 rigidly attached to the rack 18 so that their longitudinal axes are located on one straight line. Hydropushers 13 is attached to the rack 18 of the hinge axis 26 can be rotated relative to the specified axis.

The discharge line 4 chemical reagent into the well communicates with the chamber 11 to the discharge port of the dispenser 1 and represents the pipeline in the form of a flexible reinforced cap is vannoy, for example, the copolymer and armored outside. This discharge line 4 chemical reagent into the well, completed as proposed, withstands pressure up to 550 ATM. The descent into the well and consolidation of this pipeline are performed simultaneously with the descent of the tubing (tubing) 27, pipeline discharge line 4 is fixed on the outer surface of the tubing 27 by clamps 28. At the lower end of pipe discharge line 4 is fixed exhaust valve 6 so that it is placed in the reception area of the downhole pump 29. The valve 6 in the device is in function check valve. On the surface for transporting a flexible pipe discharge line 4 is wound on the drum 30.

Management hydropushers exercise 13 from the control unit (the drawing is not specified), including the generator frequency movement of the rod 14; setting the time relays in the generator frequency to the desired frequency of movement of the rod 14 and, consequently, the frequency of movement of the plunger 8 plunger pump, provide the required amount of injection of chemical into the well at a constant (invariant) volume injected per stroke of the plunger of a plunger pump.

The device operates as follows.

the work, for example, for the prevention or removal of sediment in a borehole; determine the amount of injection of the reagent in one swing of a plunger pump. Set the relay time-frequency generator control unit at the desired frequency of movement of the rod 14 of hydropushers 13. The reciprocating movement of the shaft 14 results in oscillatory movement of the lever 15, the movable roller 24 on the shoulder 22 which will periodically be in interaction with the spring loaded stop 16, which is set into reciprocating movement of the Cup 25. Emphasis 16 results in reciprocating movement of the plunger 8 plunger pump with the required data for well conditions by applying a chemical reagent. The plunger 8 in the same (opposite) the course provides filling of the hydraulic part of the dispenser 1 through the chamber 10 suction from the tank 3 with a chemical reagent, and the other (direct) during plunger 8 this volume of chemical reagent from the hydraulic part of the dispenser 1 through the Plenum chamber 11 is fed into the discharge line 4, and then through the valve 6 into the treatment area to receive the downhole pump 29 and together with the pumped fluid in the tubing string 27, where the chemical reagent on the ARPD.

Thus, prenti demulsification of wells using various chemical reagents in the wells with different technical characteristics, moreover, the regulation of injection is carried out simply, reliably, without the need to readjust themselves blocks of the device, while the effectiveness of the injection of a chemical reagent increases. Greatly simplified the design of the drive. Provides flexibility and re-usability of the device in wells with different technological regimes, easy replacement of any module of the device.

Claims

1. Device for feeding chemical into the well containing the pump, hydraulically connected with the capacity for chemical reagent and a discharge line chemical reagent into the well communicated with the bore, an exhaust valve and actuator of the dispenser, kinematically associated with the dispenser, wherein the dispenser is made in the form of a plunger pump with suction and discharge, the camera suction pipe communicated with the reservoir for chemical reagent, and the Plenum chamber with the discharge line of the chemical reagent into the well, the actuator of the dispenser is made in the form of a hinge mounted on the front of hydropushers with electric drive and control unit, and the kinematic connection of actuator and desaturates pivotally connected with one arm of the lever, the end of the second arm through which a fixed roller is in conjunction with placed in a glass of spring-loaded stops, and two shoulders lever placed on the rack can be rotated, in this case a plunger pump and a glass, in which is placed a spring-loaded stop rigidly mounted on the stand so that their longitudinal axes are located on one straight line, while the line pressure chemical reagent into a well made in the form of a flexible armored capillary tube and attached to the outer surface of tubing and the outlet valve is placed on the tube in the reception area of the downhole pump.

2. The device under item 1, characterized in that the piston pump is made in the form of a plunger of the hydraulic cylinder.

3. The device under item 1, characterized in that the control unit of hydropushers includes a frequency generator moving his rod.

 

Same patents:

The invention relates to the field of oil production, in particular to solid reagent complex impact on asphaltoresinparaffin deposits of sediment, and is designed to handle the infield and pipelines, mostly lined with polyethylene, for their comprehensive protection (simultaneous removal from the surface of sediment and prevent sediment asphaltoresinparaffin substances ASPV)

The invention relates to the oil industry and can be used for oil extraction

The invention relates to the oil and gas industry and can be used to combat deposits of insoluble inorganic salts accumulated in the pumping and oilfield equipment in the process of production, preparation and transportation of oil

The invention relates to the oil industry

The invention relates to subsurface equipment well designed to deliver solid reagent into the well and feeds it into the flow of the reservoir fluid
The invention relates to the oil and gas industry, in particular to methods of intensification of the flow of hydrocarbon fluids in wells, reservoirs which kolmat wax and paraffin deposits deposits

The invention relates to the oil industry and can be used to prevent the formation of asphalt-maloperation deposits (ARPD) and metal corrosion in oilfield equipment

The invention relates to the oil industry and can be used in the treatment of bottom-hole zone of the well, kolmat paraffin, asphaltene-tar and sludge deposits

The invention relates to the oil industry and can be used for enhanced recovery of oil, remove asphaltene-resin, paraffin entities in the systems of production, transportation and storage of oil

The invention relates to the oil and gas industry, in particular compositions for the production and transportation of oil, as well as compositions for combating asphaltene-maloperation deposits in oil field equipment, in the bottom-hole zone of oil wells and pipelines

FIELD: oil and gas production.

SUBSTANCE: invention is intended to protect inner surface of transmission pipelines against asphalt-tar-paraffin deposits and provides appropriate composition containing 0.5-10% polyvinyl alcohol, 0.01-1% nonionic surfactant (FK 2000 PLUS), and water.

EFFECT: prolonged pipeline protection effect of composition and manifested demulsification activity.

1 dwg, 5 tbl, 5 ex

FIELD: oil and gas production and corrosion protection.

SUBSTANCE: composition according to invention, which can be used for asphaltene-tar-paraffin deposits from bottom zone of formation, discharge pipes, oil-collection reservoirs, and oil-field equipment, contains 1-5 vol % nonionic surfactant: oleic acid, С912-alkyl-phenol, С910-alkyl-phenol, or N-alkyl-3-methyl-5-ethylpyridinum bromide in solvent; 1-5% cationic surfactant: product of reaction of primary and secondary aliphatic amine mixture with industrial-grade dimethyl phosphite; and solvent (Absorbent A) in balancing amount. Composition can also be based on straight-run gasoline containing in this case 10 to 50 vol % Absorbent A.

EFFECT: increased cleaning efficiency in combination with anticorrosive effect and reduced expenses on reagents.

2 cl, 3 tbl, 23 ex

FIELD: oil extractive industry.

SUBSTANCE: compound includes organic acidic reagent and cubic remains of amine production C17-C20, and as organic acidic reagent contains sulphamine acid with following ratio of components in percents of mass: sulphamine acid 20-70, C17-C20 the rest or mixture of sulphamine acid with nitriletetramethylphosphone acid with following ratio of components in percents of mass: sulphamine acid 10-40, nitriletetramethylphosphone acid 25-70, C17-C20 the rest.

EFFECT: higher efficiency.

2 ex, 7 tbl

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes examination of operation well for gas-condensation and periodical cleaning of face-adjacent well area from precipitating hydrocarbon condensate by pumping hydrocarbon condensate solvent into bed, exposure of well for period of condensate dissolution and following removal of received solution from face-adjacent area during well launch, as solvent binary mixture is used with unlimited mutual solubility of components, while at least one of them has unlimited mutual solubility with hydrocarbon condensate, and relation of binary mixture components is determined from previously built phase diagram of three-component system, formed during dissolution of hydrocarbon condensate. As binary mixture with unlimited mutual solubility of components a mixture of acetone and methanol is used, or chloroform and methanol, or chloroform and aniline, or chloroform and acetone.

EFFECT: higher productiveness.

2 cl, 3 ex, 6 tbl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes injection of processing liquid into bed, which liquid contains solved or dispersed in water complicated ether and polymer destructor, selected from oxidizing destructor and ferment destructor in such a way, that complicated ether is hydrolyzed with production of organic acid for solution of material soluble in acid, present in filtering layer or adjacent to it or in other damage in productive bed, and polymer destructor destroys polymer material, present in filtering layer or bio-film in productive bed.

EFFECT: higher efficiency, simplified method, higher productiveness, higher ecological safety.

31 cl, 1 tbl, 1 ex

FIELD: oil industry.

SUBSTANCE: compound has processed cyclohexane fraction, processed tallic or rapeseed oil, additionally has modified high-dispersion polysyl-grade silica with following ratio of components in percents of mass: processed cyclohexane fraction 69.9-78.0, processed tallic or rapeseed oil 20.0-30.0, polysyl 0.1-2.0.

EFFECT: higher efficiency.

3 ex, 4 tbl

FIELD: oil industry.

SUBSTANCE: composition for prevention of asphalt-resin-paraffin precipitations on basis of liquid pyrolysis products, used in amount of 0.03-0.05 of oil mass, has following composition, %: dark oil polymer resin, received by oxidizing polymerization of heavy pyrolysis resin during blowing of air with flow 17-23 hour-1, temperature 145-155°C in presence of cobalt salts during 2-2.5 hours, 30-35, alkylaromatic hydrocarbons 65-70.

EFFECT: higher efficiency.

3 ex, 3 tbl

FIELD: oil and gas production industry, particularly for well thawing.

SUBSTANCE: method involves lowering flushing pipe string of lesser diameter into producing tube; flushing well bore with hot technological solution and lengthening flushing pipes as hydrate ice block damages, wherein potassium chloride electrolyte is used as the technological solution.

EFFECT: increased reliability and efficiency.

FIELD: oil industry.

SUBSTANCE: method includes washing tubing pipes using solvent - condensed light hydrocarbons, produced using centrifugal forces of hydraulic cyclone, with insertion of it through behind-pipe space into said tubing columns and circulation with down-pump operating in towards-self mode. Said solvent contains admixture in form of special surfactant, washing is performed at temperature close to temperature of melting of paraffin with loss of said solvent 5-10 m3 in one well.

EFFECT: higher efficiency, broader functional capabilities.

FIELD: oil and gas production.

SUBSTANCE: reagent contains fraction obtained in processing of liquid products from oil feedstock pyrolysis via rectification of these products within a temperature range of 28 to 150°C at atmospheric pressure and in presence of polymerization inhibitors; and optionally polyalkylbenzene resin in amount 0.5-5.0% separately or in mixture with α-olefin 2.0-8.0%), or with anionic surfactant (0.05-0.2%). Reagent may also further contain 0.5-5.0% α-olefins and 4.0-10.0% butylbenzene fraction. Method of treating well bottom zone comprises injecting hydrocarbon fluid containing above-indicated hydrocarbons, forcing it into formation with buffer liquid, holding it in bottom zone for a wale, and drawing off dissolution products.

EFFECT: enhanced dissolution of asphaltene-tar-paraffin deposits on oil-field equipment and in well bottom zone and prevented re-precipitation of asphaltenes.

EFFECT: 5 cl, 3 tbl

Up!