Device for the elimination of oil deposits

 

The invention relates to the oil and gas industry and can be used to remove parfenovitch, asphalt and other deposits. Device for the elimination of asphalt and hydrated sediments contains a steel cylindrical body with a conical tip with a nozzle at its lower end. The case contains a combustion chamber with fuel and oxidizer, and ignition system. In the housing between the combustion chamber and a conical tip posted by a cooling chamber, the walls of which are covered with solid sublimiruet cooler. As subliminales cooler applied oxalate of ammonia (NH4)2C2O4H2Oh, the weight of which is not more than 30% by weight of the fuel element. Expands the scope of application of the device by reducing the rate of burning of the fuel, increasing the time of exposure and reduce the temperature of combustion products. 3 C.p. f-crystals, 1 Il.

The invention relates to the oil and gas industry and can be used to remove parfenovitch in gas wells and/or asphalt /ARPD/ and parfenovitch otogizoshi device to eliminate the wax and hydrateparaffin deposits in oil and gas wells, comprising a housing in the form of a pipe with fixed therein an electric heater, the bridge, the head of the logging cable, heat transfer nozzle on the lower end of the housing and the coolant in the housing /patent 2107808 Russia, E 21 In 37/00, 1998/.

The disadvantages of this device are low cleaning efficiency, limited scope, the need for sources of electrical energy or power lines.

A device for cleaning pipes from parfenovitch sediments, containing a hollow body, a block of heat generation performed in the camera view, with the output nozzle, and the nodes move /patent 2109127 Russia, E 21 In 37/02, 1998/.

The disadvantage of this device lies in the fact that the application for heat-generating reagents with exothermic reaction leads to the clogging layer zones /PPP/ combustion products, makes it difficult to work the pump, in addition, there is incomplete combustion of the fuel components /alkali metal/.

It is also known a device for the elimination of asphalt and hydrate deposits in oil and gas wells, including steel cylindrical housing that serves as a combustion chamber, which houses the fuel cell with the mi /Thermochemical effects on marginal and complicated wells. /,A. Chazov and others - M.: Nedra, 1986, S. 5/.

The disadvantages of this device are high temperature combustion products, high speed combustion of fuel and limited scope.

The aim of the invention is to expand the field of use of the device by reducing the rate of burning of the fuel, increasing the time of exposure and reduce the temperature of combustion products.

This objective is achieved in that the device for the elimination of asphalt and hydrate deposits in oil and gas wells, including steel cylindrical body with a conical tip with a nozzle at its lower end placed in the housing of the combustion chamber with fuel and oxidizer and ignition system, supplied housed in a steel cylindrical housing between the combustion chamber and a conical tip cooling chamber, the walls of which are covered with solid sublimiruet cooler. As a solid subliminales cooler is applied oxalate of ammonia (NH4)2C2O4·H2O, the mass of which is not more than 30% by weight of the fuel element. As the fuel element is applied butyl rubber solid fuel type T9-BC-8. form with the axis of the body angle not exceeding 45and when the supply of one nozzle these axes coincide.

The essence of the technical solution is that the use of cooler gases /ammonium oxalate/ allows to reduce the initial temperature of the gases at 650-700With that reduces the danger of overheating of pump-compressor pipes /tubing/ and get the coke formation, and reduces fire and explosion hazard. Upon contact of hot gases with the surface of the cooler is endothermic decomposition reaction of the latter with the absorption of heat. In addition, the use as a fuel element butyl solid fuel type T9-BC-8 allows you to reduce the burning speed to 0.003 m/s (in known devices, the rate of combustion of solid fuel 5-10 times more), which is very important when cleaning the tubing from ASPO, when you will need much more time than when cleaning the PPP.

The drawing shows the proposed device.

The device comprises a steel cylindrical housing 1, serves as a combustion chamber 2. Inside the housing 1 a of the fuel element 3 and the ignition system 4, the cooling chamber 5 with sublimiruet cooler 6. Ignition system 4 consists, for example, from a power source 7 /battery/ relay time oxalate of ammonia (NH4)C2O4H2O. Between the combustion chamber 2 and the cooling chamber 5 is mounted in the grille 11 made of refractory metal. The lower end of the housing 1 is equipped with a conical tip 12 with nozzles 13, the axes of which form with the axis of the housing 1 angle not exceeding 45(if three nozzles), if there is one nozzle, the axis coincides with the axis of the housing 1. One nozzle is used when removing the tubes from the tubing. In the initial position, the nozzles 13 are closed by rubber plugs 14. To improve the heat resistance of the nozzles 13 are equipped with the nozzles 15 of refractory metals. The upper end of the housing 1 is closed by a cover 16 connected by means of connecting elements 17 with the cable 18. On the outer surface of the housing 1 is installed centralizer 19, for example, a plate. The cover 16 and the tip 12 are coupled to the body 1 by means of a threaded connection. The weight of the cooler 5 is not more than 30% by weight of the fuel 3. When the weight of the cooler is greater than 30% by weight of the fuel, the combustion process in terms of the well is unstable and the efficiency of cleaning the tubing is reduced. The power source 7 and the time relay 8 can be installed also on the cover 16.

The device operates as follows. Before the descent device 6. Set the desired time delay by a time relay 8 and close the nozzle 13 plug 14. The device is lowered into the borehole using lubrication units /not shown/. The tension of the rope 18 is controlled by a dynamometer, such as DPC-1. At the touch of a conical tip 12 with asphalt, resin and paraffin deposits in the tubing tension cable 18 is reduced /this is evident from the dynamometer and/ descent device stops. After the time delay relay time 8 delivers the pulse voltage from the power source 7 to the electric igniter 10, which fires and ignites the fuel 3.

Hot gases through the bars 11 are initially in the cooling chamber 5, where upon contact with the surface of the cooler 6 is a decrease in the temperature of 650-700With, and then through the nozzle 13 in the tubing /not shown/. Hot gases causing heating of the liquid in the tubing and melting paraffin. Thus the tension of the rope 18 increases, which indicates the need to continue the descent device. The battery /gas/ is determined by the length of the fuel element 3 and the speed of combustion. Since the burning rate of butyl rubber solid fuel T9-BC-8 is me not removed all deposits the device after lifting fill with new fuel elements and ignition system and cleaning is repeated similarly. It should be noted that prior to lowering the device into the well it is filled with water - this reduces the explosive gas in the well.

Thus, the supply device a cooling chamber with ammonium oxalate and use as a fuel element butyl solid fuels provide the possibility of using it to eliminate ARPD /including paraffin tubes/ tubing.

Claims

1. Device for the elimination of asphalt and hydrate deposits in oil and gas wells, including steel cylindrical body with a conical tip with a nozzle at its lower end placed in the housing of the combustion chamber with fuel and oxidizer and ignition system, characterized in that it has placed in a steel cylindrical housing between the combustion chamber and a conical tip cooling chamber, the walls of which are covered with solid sublimiruet cooler.

2. The device under item 1, characterized in that the solid subliminales about the more than 30% by weight of the fuel element.

3. The device under item 1, characterized in that the fuel cell applied butyl rubber solid fuel type T9-BC-8.

4. The device under item 1, characterized in that the conical tip has not more than three nozzles, the axes of which form with the axis of the body angle not exceeding 45and if there is one nozzle these axes coincide.

 

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FIELD: oil extractive industry.

SUBSTANCE: device has pit-face cutting valve and mounting tool. Cutting valve has body, packer with check valve and perforated tail. Mounting tool has hollow rod, connected by shear elements to expanding cone of packer, lower and upper bodies. Lower body is provided with self-compacting collar, and upper - through tubing string of limited volume and sleeve is connected to drop valve cylinder. Valve rod is connected to rope, on which device is lowered into well. Hollow rod and tubing string form depression chamber being at constant atmospheric pressure. Rod has upper and lower shelves. On shelf of upper body expander of self-compacting collar having longitudinal grooves is mounted. After raising of mounting tool from well packer, body with tail and check valve remain in it. Then a pump is lowered into well.

EFFECT: lower costs.

3 dwg

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 and gas extractive industry.

SUBSTANCE: device has pipe-like body with detachable upper and lower sleeves. Concentrically to body, with possible rotation relatively to it, a cover is mounted with blades with scrapers placed spirally on its surface. To lower sleeve a reactive end piece is connected with slit apertures. End piece hollow is filled with granulated material engaging in exothermal reaction with acid. Lower portion of end piece is provided with check valve. Upper sleeve is provided with check valve having locking element in form of sphere with shelf and centering elements, to be dropped from well mouth. Base of saddle of check valve is made in form of disc having diameter equal to diameter of body. Pass aperture of saddle in lower portion is overlapped with easily destructible and easily removed element. Length of sphere shelf is greater than height of pass aperture of saddle of check valve of upper sleeve.

EFFECT: higher reliability, higher efficiency, broader functional capabilities of device.

3 cl, 4 dwg, 1 tbl

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 extractive industry.

SUBSTANCE: device has heating cable, placed in zone of possible paraffin-forming, and circuit for its heat control connected to it. Device is provided with two-drive transporter of heating cable, made with possible hoisting of heating cable in well with consideration of compensation of pushing force of mouth pressure on heating cable. Transporter has detachable body, consisting of two portions and provided with adjusting tying element, connected to its portions for forming pressing force to heating cable of two roller groups. Rollers with axes are mounted in detachable body. Cogs are placed on rollers axes. One roller group is connected to one drive, another group - to another drive for assuring possible transfer of rotation through cogs to roller couples. On heating cable at least one yoke is mounted with possible enveloping, which is placed on mouth packing gland and is provided with counter-exhaust cable.

EFFECT: higher efficiency.

2 cl, 4 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has serially connected, by tubing pipes, in upward direction, oval-shaped trap, check valve, connecting pipe, at least one drop valve and localizers placed on pipes. Between connecting pipe and drop valve an unloading valve is mounted. Above drop valve a preventing valve of plug type is placed. At mounting portion between unloading and preventing valves a hermetic working chamber is formed, filled with air at atmospheric pressure. Localizers are made in form of shells freely rotating on rolling bodies perpendicularly to pipes. In shells on axes, placed perpendicularly to longitudinal axis of device, freely rotating rollers are fixed. Check valve is made with possible opening and closing of pass aperture at its any position and is in form of two semi-circular spring-loaded plates, placed on common axis, and folding when pass aperture is opened. Trap has main axial input channel and input channels passing inside at angle 30, 60, 90 degrees to longitudinal axis of device, which are placed in levels along circle. Connecting pipe is made in form of replaceable bushings having different pass aperture diameters. Unloading channel is made in form plunger, fixed by shear pins in starting position in a cylinder, with solid axial channel, connected to hermetic working chamber. Said channel has output onto side plunger surface which output is sealed at starting position and is connected to lower inner space of device after destruction of shear pins and displacement of plunger to lower position, which occurs after unloading of device under effect from its weight and weight of support of tubing pipes during interaction with polluted well portion.

EFFECT: simplified operation.

8 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has hollow body with through ports along whole length, axes of which are displaced relatively to one another along spiral. Scraping elements in form of separate resilient brushes are mounted in through ports on basis of condition of providing for cleaning by working surfaces - ends of separate resilient brushes and free exit of removed deposits between brushes and hollow body. Separate resilient brushes are in form of bushings with pressed in bunches of steel wires, which are mounted in through ports with overlapping of each other and possible overlapping by working surfaces - ends of separate resilient brushes of whole inner perimeter of cleaned pipe. Bushings with pressed in bunches of wires are made enlarged in size according to inner diameter of cleaned pipe in accordance to yielding condition of separate brushes material. Spiral coiling angle is 180 degrees.

EFFECT: higher efficiency.

4 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: method includes lowering into well, to depth of forming of deposits, of linear heating element in form of pipes column in well or of metallic conductor and feeding conductor. Heating is performed by letting high-frequency electric current through feeding conductor while providing for its locking in head portion of heating system at depth of forming of deposits. Metal of linear heating element is effected with high-frequency field of feeding conductor. Frequency of electric current is set at lower limit on basis of condition, that depth of penetration of high-frequency field into metal of linear heating element was less than its thickness. Heat production is adjusted to provide primary heat production along linear heating element by decreasing space between the latter and feeding conductor and by increasing frequency of electric current from this lower limit. Locking of electric current in head portion of heating system between heating element and feeding conductor is performed through locking element, having falling dependence of resistance from temperature increase. Frequency of electric current is set at lower limit during lowering of heating system and is increased after passing whole depth of forming of deposits and obstructions. Locking of electric current in head portion of heating system can be performed through substance, having properties of weak electrolyte, for example, through well liquid, and frequency of electric current is increased in area of manifestation of effect of steep increase in its productiveness. Device has heating system, consisting of feeding conductor and linear heating element, and locker of electric current between these in its head portion. Feeding conductor is made of coiled and isolated conductors. Linear heating element is in form of column of pipes in the well or a bare metallic conductor. Cross-section of conductor is selected to be enough for supporting weight of heating system lowered into well. Electric current locker in head portion of heating system is made in form of winding of high-frequency wire, woven on ferrite core and placed inside metallic cover in such a way, that ferrite core by end portions is locked on this cover. Grade of ferrite of core is selected from condition, that its temperature of magnetic properties loss should exceed temperature of melting of deposits in a well, but is not greater than temperature of their combustion or carbonization. Current locker in head portion of heating system may be made in form of bare electrode, connected to feeding conductor and placed relatively to heating element in such a way, that between them a channel is formed along axis of bare electrode for passing of well liquid.

EFFECT: higher efficiency, higher reliability.

2 cl, 4 dwg

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