Device for treatment of bottom-hole formation zone of oil well. RU patent 2496975.
| Treatment method of bore-hole zone / 2494246 Treatment method of a bore-hole zone involves the first stage, at which solution of surface-active substance (SAS) 0.5-1.5% in formation water in the volume of 100-200 m3 is pumped to the well; the second stage, at which there pumped is water solution of hydrochloric acid (10-15%) in the volume based on 0.25-0.5 m3 per running metre of perforated depth of the formation at initial pressure equal to final pressure at the previous stage; the third stage. At which there pumped is water solution of hydrochloric acid (10-15%) with a retarder of the reaction of acid with rock in the volume of 2-5% of volume of the acid solution in the pumping volume of 1-1.5 m3 per running metre of the perforated formation depth at initial pressure equal to final pressure at the previous stage; formation water forcing-through in the volume of 100-200 m3 at initial pressure equal to final pressure of pumping at the previous stage; process exposure during 16-48 hours and bringing the well into operation. Formation water can be pumped in advance to the well till pumping pressure rise at the well head to 1-2 MPa. |
 Treatment method of bottom-hole formation zone / 2494245Acid treatment method of a bottom-hole formation zone involves pumping to the formation of emulsion and water solution of an acid; at that, first, water solution of acid is pumped, and pumping of water solution of acid and emulsion is performed in a series-and-alternating mode, and emulsion containing the following components, wt %, is used as emulsion: acid 5.0-40.0; emulsifier - anionic or nonionic, or cationic surface-active substance, or their mixture 1.0-10.0; hydrocarbon solvent 5.0-40.0; decomposer - primary or secondary alcohol or their mixture 0.1-5.0; corrosion inhibitor 0.01-0.05 and water is the rest. Emulsion can contain viscosity regulator in the quantity of 0.01-6.0 wt %. Water solution of acid with concentration of 3.0-24.0% is used. |
 Treatment method of bottom-hole formation zone / 2494244In a treatment method of a bottom-hole formation zone, which involves pumping to the formation of acid-oil emulsion of reverse type and acid, as acid-oil emulsion of reverse type there used is emulsion containing the following components, wt %: dispersion medium - hydrocarbon liquid 31-38, emulsifier - reaction products of aliphatic amines of fat acids of hydrated tall oil with hydrochloric acid in terms of amines 0.02-0.08, dispersion medium - synthetic, inhibited hydrochloric acid (10-18%) is the rest. |
| Method for near well-bore treatment with acid / 2490444 Method for near well-bore treatment with acid involves at the first stage pumping into the well of 10-15% aqueous solution of hydrogen chloride in a volume calculated on the basis of 0.25-0.5 m3 per 1 running metre of penetrated stratum depth; at the second stage - pumping of 10-15% aqueous solution of hydrogen chloride with a retarder of the acid reaction with rock in the volume of 2-5% of acid solution volume in total volume of pumping calculated on the basis of 1-1.5 m3 per 1 running metre of penetrated stratum depth at initial pressure equal to the final pressure value during pumping at the previous stage; overflushing by oil in volume of 5-15 m3 at initial pressure equal to the final pressure value during pumping at the previous stage; soaking during 16-48 hours and input of the well into operation. |
 Procedure for treatment of bottomhole zone of producer with two wellheads / 2490443In procedure for treatment of bottomhole zone with two wellheads in case of failure of an electric-centrifugal pump (ECP) with no apparent deviation in its operating parameters and in case of alkalinity growth for extracted product up to pH>7 the required volume of hydrogen chloride solution is calculated on the basis of a length and diameter of the well filtering part; the required volume of hydrogen chloride solution is selected to treat the whole volume of the strainer; the required volume of flush fluid is calculated for delivery of compounds into a slope wellhead. ECP is shutdown at the vertical wellhead before pumping of hydrogen chloride solution is started. The required volume of hydrogen chloride solution is carried out into tubular annulus from the side of the vertical wellhead. When pumping of hydrogen chloride solution is over extraction from the slope wellhead is increased and ECP is started from the vertical wellhead. ECP is stopped at the vertical wellhead and hydrogen chloride solution is overflushed by the flush fluid into filtering part of the well. After ECP startup in enlarged extraction rate from the slope wellhead samples are taken periodically in order to check pH value, monitor dynamics in changes of fluid supply from the slope wellhead. When pH value id recovered up to the normal value ECP is started into operation from the vertical wellhead and supply from the slope wellhead is returned back to normal operation mode. |
| Method for well completion / 2490442 In method for well completion including pumping of acid solution into open horizontal hole in the mode of jet impact such impact is attained due to a jet delivery by a jet nozzle at the end of a flexible flush-joint pipe. The nozzle is placed at the borehole bottom. The acid solution is pumped with circulation through the well mouth; while acid solution is circulating the flexible flush-joint pipe is lifted simultaneously from the well with the speed not exceeding speed of the borehole filling by the acid solution. When horizontal hole is filled with the acid solution, the solution is overflushed into the stratum with staged pressure build-up and exposure at each stage. The flexible flush-joint pipe with a nozzle is placed again at the borehole bottom and the operation of borehole filling and overflushing is repeated again. Soaking takes place so that acid solution could react with the rock. The flexible flush-joint pipe is lifted to the interval of inert gas pumping, an inert gas is pumped and a build-up curve is recorded. Cyclic well killing is carried out in the mode of water pumping - soaking - oil draining till complete oil drain; thereafter a submerged pump is run-in and the well is input into operation. |
 Device for treatment of bottomhole formation zone of a well and method for treatment of bottomhole formation zone of well / 2487237Device for treatment of bottomwhole formation zone contains an air chamber with atmosphere pressure and length of 20-50 m connected to the first additional perforated chamber with seal layer, solid heat generating compound A with flame igniter, combustible high-strength compound B and breakable calibrated membrane located inside; the first added perforated chamber by means of a coupling with holes is connected to the second added inlet chamber with combustible high-strength compound C, igniter and breakable calibrated membrane located inside; the second additional perforated chamber by means of a coupling with added air chamber with length of 1.5-3 m connected by means of a coupling and metal adapter with to inlet chamber that is made of elastic plastic material with seal layer, solid acid generating compound D with igniter located inside; in the metal adapter there are drilled holes; compound A generated heat and gas of the following components by wt %: ammonium nitrate 35; sodium bichromate 2; barium nitrate 15; aluminium ASD-1 1.5; iron-aluminium thermite 31; epoxide compound (mixture of ED-20 tar, EDOS plasticiser and AF-2M hardener) 15.5; compound B is made of the following components by wt %: ammonium nitrate 30-40, calcium carbonate 5-10, the above epoxide compound 50-65; inside the added inlet chamber there is a layer of glass sealant and solid gas generating compound E made of the following compounds by wt %: ammonium nitrate 70, sodium bichromate 1, the above epoxide compound 29; compound C is made of the same composition as compound B; compound D is made as thermal-gas-chemical solid fuel with a layer of glass sealant and a layer of epoxide compound on top of it; the above fuel consists of the following components by wt %: ammonium nitrate 12-16, lithium fluoride 1-3, barium nitrate 5-8, aluminium ASD-1 0.7-0.8, iron-aluminium thermite 14-16, hexachlorane 20-30, polytetrafluoroethylene 20-30, the above epoxide compound 5-10. The method for treatment of bottomhole zone (BHZ) includes delivery of the above device by a wireline, combustion of compound D and formation of maximum quantity of chemical agents, holding for the purpose of reaction of acids produced during combustion with BHZ formation, running with installation of the coupling with holes at the level of treated stratum, opening of the chamber with length of 20-50 m, actuation of breakable calibrated membrane in result of layer-by-layer combustion of compounds A and B with implosion treatment of BHZ, removal of impurities from bottomhole stratum; during holding thermal-gas-chemical impact acts on the stratum for 30 minutes ad pressure can be corrected due to availability of holes in the metal adapter at fixed position of the above fuel inside the inlet chamber due to the above layers of sealant and compound with formation of gases heated up to high temperatures at high pressure within treatment range; opening of the chamber with length of 1.5-3 m is carried out by sequential actuation of the igniter, compounds E and C and breakable calibrated membrane located in the second added inlet chamber; after hydraulic shock there's another holding of the process for 30 minutes; when the chamber with length of 20-50 m is opened combustion of compound A takes place with formation of gases heated up to high temperature at high pressure within treatment range. |
 Stimulation method of formation fluid influx from well / 2485305Stimulation method of formation fluid influx from the well consists in lowering to the well of a tubing string. Counter pressure on the productive formation is decreased owing to replacing the liquid column with liquid-gas mixture (LGM) at observance of the required value of depression on the productive formation. Before the tubing string is lowered, its lower end is equipped with a remote subsurface pressure gauge and a filter. The tubing string is lowered to the well so that the filter is located opposite the formation perforation interval; after that, treatment of the bottom-hole zone of the formation is performed using a chemical method with process exposure for reaction. Then, the tubing string is lowered further so that the filter is located below the formation bottom, and into the inter-string space there lowered is a string of flexible tubes (FT) 100 m below the liquid level in the well. The liquid column is replaced in the inter-string space of the well with LGW and lowering of the FT string is continued. When lower end of the filter of the tubing string is reached, lowering of the FT string is stopped; then, stimulation of the formation fluid influx is started by gradual reduction of density of pumped LGM till the required depression on the productive formation, which is controlled as per readings of the remote subsurface pressure gauge, is achieved. After completion of stimulation of the influx from the well there removed is FT string from the inter-string space of the well, and operating equipment is lowered to the well and the well is put into operation. |
| Method for reagent clay cake removal from well / 2484244 Method for reagent clay cake removal from a well involves preliminary lowering of the tubing to lower perforation holes, formation in the zone of perforation holes of the first bath by pumping to the well via the tubing of a clay cake removing solution, its exposure, removal, further formation in the same zone of the second bath of water solution of acid with its being forced through the perforation zone to the formation and removal of the second bath by flushing; development of the well. As the clay cake removing solution, water solution of caustic soda with addition of surface active substance (SAS) is used. When the tubing is being lowered to the ell, it is equipped with a packer. Then, at open casing valve there performed is formation of the first bath by pumping of the above water solution of caustic soda via the tubing string, and the specified water solution of caustic soda is delivered to the formation by its being forced with process liquid via the tubing. Them the packer is set at the depth of not less than 50 metres above the treated formation, and forcing of water solution of caustic soda is performed with process liquid to the formation without exceeding allowable pressure on the formation; then, the well is kept for 10 hours for reaction under pressure not exceeding allowable pressure on the formation. Then, the packer is unpacked, and the working face is flushed by reverse flushing with process water by additional lowering of the tubing to the distance of 1-1.5 metres till the working face. Then, the packer is lifted so that it can be located at the depth of not less than 50 metres above the formation. Then, in the same zone there formed is the second bath by pumping of clay-acid solution with addition of Katapin KI-1 reagent on the basis of the fact that volume of clay-acid solution shall be 0.5-1 m3 per metre of the formation. The above clay-acid solution is forced with process fluid via the tubing to the formation; then, the packer is set and forcing of clay-acid solution is performed with process fluid to the formation without exceeding allowable pressure on the formation. Reaction exposure is performed during 1-2 hours. Then, well swabbing is performed via the tubing in the volume of 1.5-2 of the well volume. Then, the well injection capacity is determined at the pressure not exceeding maximum allowable pressure on the formation. When the required well injection capacity is not achieved, the above operations are repeated maximum for three times till the required well injection capacity is achieved. |
| Method for increasing oil recovery of deposit in carbonate reservoirs of fracture-pore type / 2482269 Method for increasing oil recovery of the deposit in carbonate reservoirs of fracture-pore type involves formation of a group of production wells with an injection well in the centre so that the injection well can be located in the lower part of the deposit structure in relation to production wells, oil recovery from the group of wells watered out with bottom water, forced extraction of fluid from the injection well till the response of the neighbouring wells to that action and reduction of formation pressure in the area of responding production wells. After steady reduction of formation pressure in the area of responding production wells by more than 10 %, each of them is pumped with waterproof compound that is strengthened under action of chlorhydric acid in the volume of 15-20 m3. After waterproof compound is cured, forced extraction of the fluid is stopped and acid bearing compound in the volume of 0.4-1.0 m3 per metre of oil saturated part of the formation is pumped to each well treated with waterproof compound. Responding production wells are brought into operation. |
 Development method of deposits of high-viscosity oil or bitumen / 2496000Method involves drilling of injection and production horizontal wells with location of a working face of an injection well above the middle part of horizontal production well, pumping of heat carrier through injection wells, extraction of product through production horizontal wells with monitoring of the product temperature. When allowable temperature is exceeded, a packer is installed and then transferred in a production well for extraction in a section of horizontal shaft with lower temperature. An injection well is drilled above a production well in its direction. Injection well is equipped with additional portable blind packer, which is transferred in horizontal section from well head to working face parallel to packer of production well, which is installed after break of heat carrier from injection well to production well with creation of hydrodynamic communication between those wells for cutout of heat carrier break section. At further break of heat carrier from injection well to production well above the installed packer, it is reinstalled in series above heat carrier break sections. |
 Method of bitumen deposit development / 2495237Method of bitumen deposit development includes construction of double-mouth top and bottom well with horizontal areas which are equipped with stacked filters with holes; run-in operation of pipe strings with pumps in order to extract heated bitumen; heating of productive stratum by steam injection to both wells; heating of cross-hole area of stratum; reduction of bitumen viscosity, reading of thermograms from heat-sensing devices located at horizontal areas of wells, analysis of stratum condition regarding its heating and equal heating of stratum considering the obtained thermograms. Filters of horizontal areas of top and bottom double-mouth wells are divided into extraction areas. Inside filters, opposite each extraction area liners with holes are installed; the liners are at ends of pipe stings from mouths of double-mouth wells. Liners are connected rigidly with respective pipe strings and holes of filters can be either open or closed hermetically at horizontal areas of double-mouth wells. Tubing-casing annulus of the top and bottom double-mouth wells is interconnected from one mouth. Tubing-casing annulus of the top and bottom double-mouth wells is connected from the other mouth with steam generator. With closed holes of filters at horizontal areas of double-mouth wells, heating of crosshole area of stratum and areas located higher and lower than horizontal areas of double-mouth wells is made; bitumen viscosity is reduced by closed steam circulation simultaneously through tubing-casing annulus of the top and bottom double-mouth by means of steam generator without steam injection into stratum. When temperature of 85-95°C is reached against data of thermograms taken heat-sensing devices in sampling areas of double-mouth wells steam generator is switched off, steam circulation is stopped, holes of filters are open by their alignment with holes of liners and extraction of bitumen is started simultaneously from the top and bottom double-mouth wells through pipe strings by means of pumps. When temperature of 35-45°C is reached against data of thermograms taken by heat-sensitive devices pumps are switched off, holes of filters are closed hermetically by means of their misalignment with holes of liners; steam generator is switched on and the whole process of crosshole area heating and reduction of bitumen viscosity by closed steam circulation is resumed through tubing-casing annulus of the top and bottom double-mouth wells. |
 Development method of high-viscosity oil deposit using in-situ combustion / 2494242In development method of a high-viscosity oil deposit using in-situ combustion, involving construction of horizontal and vertical wells, pumping of an oxidiser through vertical well and extraction of product from horizontal well, working face of vertical well is located at the distance of 28-32 m above horizontal well and at the distance of 10-15, from its working face towards the head. Prior to pumping of the oxidiser, in horizontal and vertical wells there installed are electric heaters with power sufficient for warm-up of borehole environment to the temperature of 100-200°C. After that, pumping of the oxidiser is started to both wells for initiation of in-situ combustion in the deposit in the bottom-hole area of location both wells. Then, when formation pressure near horizontal well exceeds the value of level of initial formation pressure more than by 1.5 times, the electric heater is removed from horizontal well and pump equipment is lowered to it, by means of which pumping-out of the deposit product is performed. When liquid level in the well decreases to 100% to 90% of the level of initial formation pressure, the product extraction is stopped, pump equipment is removed, electric heater is lowered, and the oxidiser pumping is performed to initiate in-situ combustion. Cycle of product extraction and initiation of in-situ combustion is repeated and stopped at establishment of hydrodynamic communication between horizontal and vertical wells. Then, horizontal well is operated in a product extraction mode. Electric heater installed in the vertical well is disconnected and removed from that well after the mode of stable high-temperature combustion is set; after that, oxidiser pumping is continued. |
 Development method of deposits of high-viscosity oil or bitumens / 2494241Development method of deposits of high-viscosity oil or bitumens involves drilling of injection and production horizontal wells with location of a working face of an injection well above middle part of horizontal production well, pumping of heat carrier through injection wells, extraction of product through production horizontal wells with monitoring of the product temperature; when allowable temperature is exceeded, a packer is installed and its further transfer in a production well for extraction in a section of horizontal shaft with lower temperature. An injection well is drilled above a production well in its direction. A packer is installed after break of heat carrier from injection well to production well with creation of hydrodynamic communication between those wells for cutout of heat carrier break section. At further break of heat carrier from injection well to production well above the installed packer, it is reinstalled in series above heat carrier break sections. |
 Development method of deposits of high-viscosity oil or bitumens / 2494240Development method of deposits of high-viscosity oil or bitumens involves drilling of injection and production horizontal wells with location of a working face of an injection well above middle part of horizontal production well, pumping of heat carrier through injection wells, extraction of product through production horizontal wells with monitoring of the product temperature; when allowable temperature is exceeded, a packer is installed and its further transfer in a production well for extraction in a section of horizontal shaft with lower temperature. An injection well is drilled above a production well in its direction. Horizontal section of production well is drilled with packing of perforation holes from the head to the working face, and section of injection well is drilled from the working face to the head. A packer is installed after break of heat carrier from injection well to production well with creation of hydrodynamic communication between those wells for cutout of heat carrier break section. At further break of heat carrier from injection well to production well above the installed packer, it is reinstalled in series above heat carrier break sections. |
 Method for production of natural gas from gas-hydrate pools and device for its realisation / 2491420Method includes decomposition of gas hydrates in a massif of their occurrence by heating to temperature exceeding temperature of their natural decomposition by means of water injection along a pipe string via a well into a gas-hydrate pool and discharge of produced gas to the surface along the specified well. According to the invention, the gas-hydrate pool is developed in blocks. In the centre of each block a development well is drilled down to the pool foot and fixed. The section of the casing string in the pool interval is perforated. A heat insulated suspended string is lowered into the casing string down to the pool foot, along which water is injected, which is heated to temperature exceeding at the outlet of the suspended string the natural temperature of gas hydrate decomposition. Discharge of released gas is carried out in the annular space of the casing and suspended strings in the form of a gas and water mixture and in the gas lift mode. The block of the gas-hydrate pool is developed to detect a gas leak to the day surface bypassing the casing string and termination of gas lift effect, which certify formation of a contour of the hydrate decomposition area to the roof of the gas-hydrate pool. Then they start developing another block. At the same time intensity of gas hydrate decomposition and volume of produced gas are controlled by changing temperature and flow of water injected along the string, and also by depression and reduction of its initial value in the mined pool, achieved by establishment of casing and suspended strings in the annular space for the gas-water mixture of the gas lift mode supplied to the surface. |
 Well heater for deflected and flattening out holes / 2491412Well heater for deflected and flattening out wells comprises a hollow cylindrical vessel with a fuel element installed in it and a heating element that contacts with the fuel element connected via a sealed electric slot to a source of power supply. At the same time the well heater is made at least from two fuel elements connected to each other with the help of elastic links and installed as capable of rotation relative to each other. Besides, the lower part of each fuel element is made with a convex round outer surface, and the coupled upper part of the second and subsequent fuel elements is equipped with a round concavity of the same radius. |
 Downhole reactor for oxidation of light hydrocarbons / 2490441Downhole reactor for oxidation contains one input for oxidiser delivery through tubing joint and the other input for delivery of light hydrocarbons through a separate pipeline, a mixer, oxidation reactor and a downhole heater. The cup-type mixer is located in the upper part of the downhole reactor. The mixer is equipped with a tube in the centre for premixing of input products and input to feed light hydrocarbons; the mixer is connected to a hydraulic flange connected, in its turn, to the downhole heater by couplings. The oxidation reactor is placed inside the downhole heater. The downhole heater consists of a series of electric heaters hearted by overflow gates fixed to heat sensor casings; in the lower part the heater contains a filter; it is also equipped with a plug with a hole in order to output a derived product. |
 Oil production method / 2490440Oil production method includes delivery of a working fluid to an injection well and extraction of oil products through a production well with further separation of associated gas from oil and its burning. Burning of associated gas is carried out with plenty of outdoor air. Products of associated gas combustion are cooled; water and liquid carbon dioxide gas are separated and remaining gaseous phase is released. In order to obtain a working fluid liquid carbon dioxide gas is mixed up with water steam generated during heating of prepared water by products of associated gas combustion. |
 Production method of underwater deposits of gas hydrates, and underwater production complex of gas hydrates / 2489568Pipeline is routed from a platform on sea surface to deposits of gas hydrates at sea bottom, which consists of an external pipe and an internal pipe. Sea water heated to 30...40 degrees Celsius is transported via the internal pipe immediately to a gas hydrate deposit. Bubbles of gaseous methane are transported together with water via the external pipe upward to the platform. Methane is separated from water. Methane is supplied to tanks or to the main pipeline. When sea water heated to 30...40 degrees Celsius is being supplied, granite chips are supplied in the ratio of 1:2 to fill in the inner volume of the formation, which has been released at extraction of gas hydrates. Underwater production complex includes a platform with a pipeline consisting of an internal sea water supply pipe immediately to gas hydrate deposit, which is heated to 30-40 degrees Celsius, and granite chips in the ratio of 1:2, and an external pipe for transportation of gaseous methane bubbles together with water upwards to the platform to separate methane from water. Besides, there are pumps, a gas-turbine plant rated at 6 MW and a thermal power plant to generate energy due to thermobaric difference of sea water. The platform is made in the form of a movable sea unit with a submersible tank by means of a telescopic device, inside which a pipeline made from propylene is arranged. Diameter of the external pipe increases in upward direction. |
 Method and device for oil and gas well operation intensification (versions) / 2495999For intensification of wells operation multi-component depression devices are used. In productive formation they form depression zones with distance of up to 100 metres and more with depression value within 0.1-0.9 of hydrostatic pressure, with depression duration of 0.3-3.5 seconds and more under factor of impact on formation of up to 4.5 and more creating thus depression-hydrogasdynamic impact in controlled mode to open existing cracks and create new cracks. Also involvement of dead-stagnant oil-saturated sections in development is provided. At that extraction of colmatant and rock specimen from well bore zone of productive formation is performed as well as allotment of fracture zones and their connection to geological section. |
FIELD: oil and gas industry.
SUBSTANCE: device for treatment of a bottom-hole formation zone of an oil well includes an air chamber with atmospheric pressure and a receiving chamber made from light-weight elasto-plastic material. In the receiving chamber a provision is made for composite materials of cylindrical shape: slightly gassy material and material that generates gas at combustion, and in addition, the receiving chamber of the device includes composite material that generates gas and acid at combustion between slightly gassy and gas-generating composite materials. Slightly gassy composite material at combustion, which faces the air chamber and is fixed with radially located metal pins relative to the receiving chamber housing, is made of composition containing the following, wt %: agranulated ammonium nitrate grade B 45-46, potassium bichromate 1-2, epoxy resin grade ED-20 40-42, plasticising agent grade EDOS 2-3, hardening agent Agidol grade AF-2M 9-10. Gas- and acid-generating composite material at combustion is made of composition containing the following, wt %: ammonium nitrate 40-50, powder-like fluorine rubber grade SKF-32 with dispersity of 0.5-1.5 mm 10, chlorinated paraffin wax grade KhP-1100 10-30, and fluoroplastic grade F-32L 10-40. Composite material that generates gad at combustion is made of composition containing the following, wt %: ammonia nitrate 78-85, powder-like nitryl butadiene rubber with dispersity of 0.5-1.5 mm 12, and potassium bichromate 3-10.
EFFECT: improving efficiency of a device owing to complex thermogas-dynamic and chemical action on a bottom-hole formation zone of an oil well, reducing slag formation relative to weight of the device by 3-5 times, and simplifying the device manufacture.
1 tbl, 5 ex, 1 dwg
Field : oil producing industry, in particular to a device for increasing the productivity of wells by bottom-hole treatment of oil wells.
A device for treatment of bottomhole formation zone of oil well, including air chamber with atmospheric pressure, the diaphragm and the receiving chamber of the solid composite material cylindrical shape, consisting of two parts: the first part, turned to an air chamber and consists of a solid with allocation during the combustion of composition, with axisymmetric cavity filled with a mixture of the first and second parts, done in the first part from the party turned to the second part and the second part is formed of the gassing agent during the combustion of composition, in which a receiving chamber made of lightweight material erodible as combustion hosted in her solid composite material, and the second part of the combustible solid composite material made with a strength in excess of bottom-hole pressure, with the first part comprises, mass%:
thermo
brand T-SAINT-2 -144-62
61-63nitric barium GOST 3771-65
29-31aluminum ASD-1 GOST 6058-73
2,9-3,1epoxy resin brand ED-20 GOST 10587-84
with hardener polyethylenepolyamine
STU-49-2529-62 in the ratio of 10:1
4,8-5,2,and as the second part of the combustible solid composite material with a strength exceeding bottom-hole pressure, used material, including granulated ammonium nitrate, potassium dichromate, epoxy resin, plasticizer brand BUILDERS and hardener Agidol brand AF-2M at the following component ratio, mass%:
ammonium nitrate granulated grade B
70-74potassium dichromate
3-5epoxy resin brand ED-20
19,5-21,5
plasticizer brand BUILDERS
1,5-2,0hardener Agidol brand AF-2M
3,5-4,5,and as easy material, destroyed during the combustion of solid composite material used tube of , polypropylene or polyethylene high density, see the RU Patent 2138630, IPC 21 43/25, 21 43/18 (2006.01), 1999.
The disadvantage of this device is the complexity of the design and implementation of the first part of the combustible composite material consisting of different elements made of materials of different compositions and of different forms ( with a cavity and cylindrical). Another disadvantage is the possibility of the device of the shift and the subsequent premature destruction of a material of the first part, which will lead respectively to premature triggering an air chamber and reduce the efficiency of the device. This is because the value of pressure, which is enabled, the air chamber, depends not only on the strength of the solid composite material of the first part serving simultaneously diaphragm cover, but also on the value of adhesion of the material of the first part to body material reception chamber. The specified bond strength in the device may be insufficient at high pressure in the mine, especially in the absence of a pick-up formation in the combustion process of the second part of the composite device.
The closest is essentially a technical device for the treatment of the formation zone of the oil wells, including air chamber with atmospheric pressure and suction chamber made of light material, which has consistently placed cylindrical composite materials, composite material with allocation during combustion, speaking to an air chamber and fixed radial metal pins motionless relatively to the case of the reception chamber, formed from the composition, comprising, mass%:
ammonium nitrate granulated grade B
45-46potassium dichromate
1-2epoxy resin brand ED-20
40-42plasticizer brand BUILDERS
2-3hardener Agidol brand AF-2M
9-10,and the combustion of composite material formed from the composition, comprising, mass%:
ammonium nitrate granulated grade B
70-74potassium dichromate
3-5epoxy resin brand ED-20
19,5-21,5
plasticizer brand BUILDERS
1,5-2,0hardener Agidol brand AF-2M
3,5-4,5,see the RU Patent 2313663, IPC 21 43/18 (2006.01), 09 8/70 (2006.01), 2007.
The disadvantages of this device is its low efficiency due to the lack of chemical effects on the skeleton of the breed acids, that can increase the porosity of the reservoir rock, increasing the efficiency of treatment of bottomhole formation zone wells, increased the weight of the device, as well as composite material on the basis of epoxy resin can be created method extrusion, which creates difficulties in its manufacture.
The objective of the invention is to increase the efficiency of the device due to the complex and chemical action of the bottomhole formation zone of oil-well, a decrease in the slag formation relative to the weight of the device and simplification of manufacture of the device.
Technical problem is solved by the device for bottom-hole treatment of oil wells, including air chamber with atmospheric pressure and suction chamber made of light material, which has a cylindrical composite materials, the combustion of composite material, speaking to an air chamber and fixed radial metal pins motionless relatively to the case of the reception chamber, formed from the composition, comprising, mass%:
ammonium nitrate granulated grade B
45-46potassium dichromate
1-2epoxy resin brand ED-20
40-42plasticizer brand BUILDERS
2-3hardener Agidol brand AF-2M
9-10,and the combustion of composite material, which the combustion of composite material formed from the composition, including, wt.%:
ammonium nitrate
78-85powdered butadiene-nitrile
rubber with dispersion 0.5-1.5 mm
12potassium dichromate
3-10,and between and gas-generating the combustion of composite materials receiving chamber of the device additionally contains gas and when combustion of composite material, which is formed from the composition, comprising, mass%:
ammonium nitrate
40-50powdered fluoro brand GFR-32
with dispersion 0.5-1.5 mm
10brand CP-1100
10-30fluoroplast marks the f-32L
10-40.Technical solution allows to increase efficiency of the device due to the complex and chemical action of the bottomhole formation zone of oil well, reduce the weight of the device in 3-5 times, and simplify the production of devices due to the formation of and gas and the combustion of composite materials by extrusion.
The claimed device includes, see Figure 1, air chamber 1 from the atmospheric pressure to the cable head 7 air chamber is connected the cable through the delivery of an electric shock on igniter 8, located on the end of the reception chamber from composite material 5; receiving chamber 2, made of light material as easy material, destroyed during the combustion of solid composite material can be used pipe from , polypropylene or polyethylene of high density. The receiving chamber placed cylindrical composite materials: the combustion of composite material 3, speaking to an air chamber 1 and fixed radial metal pins motionless relatively to the case of the reception chamber 2, gassing agent during the combustion of composite material 5, between and gas-generating the combustion of composite materials receiving chamber of the device additionally contains a gas and the combustion of composite material 4, the ends of the reception chamber 2 covered with sealing layer of sealant on the basis of 6, of a thickness of 20 mm material is destroyed as combustion of composite materials, i.e. as sequential combustion composite material 5, then gas and 4, and then composite material with emitting at combustion 3.
Composition material 3, speaking to an air chamber with 2 allocation during combustion, formed from the composition, comprising, mass%:
ammonium nitrate granulated grade B
45-46potassium dichromate
1-2epoxy resin brand ED-20
40-42plasticizer brand BUILDERS
2-3hardener Agidol brand AF-2M
9-10,gas and the combustion of composite material 4, formed from the composition, comprising, mass%:
ammonium nitrate
40-50powdered fluoro brand GFR-32
with dispersion 0.5-1.5 mm
10brand CP-1100
10-30fluoroplast marks the f-32L
10-40,gassing agent during the combustion of composite material 5 formed from the composition, comprising, mass%:
ammonium nitrate
78-85powdered butadiene-nitrile
rubber with dispersion 0.5-1.5 mm
12potassium dichromate
3-10.The device works as follows.
By connecting to the cable head 7 cable-rope device down in the bottom of a well and set the receiving chamber of the 2 opposite treated interval of the reservoir. Wells through the cable serves electrical impulse to the igniter 8, which is located in the centre of the end of the reception chamber from composite material 5. the combustion of composite material 5 is easily ignited by the igniter 8 and serves as a reliable ignition of gas and the combustion of composite material 4, the latter has the combustion temperature at 500K lower than composite material 5. According to the calculated data the temperature of the combustion gas and composite material 4 is about 1450 and composite material 5 is 1950. After the ignition and combustion process composite material 5, and then gas and composite material 4 highlights gaseous products of combustion and hydrochloric and hydrofluoric acids, which are located at elevated temperature and pressure. Thermogas dynamic stimulation of bottom-hole formation zone is carried out by the emission of the combustion of gases under high pressure penetrate the pores and cracks in the bottom zone melting are pollution in the form of and paraffin sediments. Molten pollution stem from perforations, thanks to which restored hydrodynamic relationship reservoir well. Chemical effects is ensured by the fact that, when burned, is allocated hydrochloric and hydrofluoric acids, which impact on the skeleton of the breed, increasing the porosity of the reservoir rock. Due to the integrated and chemical resistant products of combustion of the bottomhole formation zone of oil-well increases the efficiency of its treatment.
After the combustion of gas and composite material burning securely transmitted during combustion composite material 3, due to the fact that the combustion temperature of the latter on 500K less combustion temperatures of the previous composition of the material and is estimated to order 950.
By the time of disclosure air chamber 1 due to the combustion of composite material 3 gaseous products formed during the combustion of composite materials 5 and 4, are evicted from the area of the receiving chamber of the borehole liquid, which flows into the air chamber. Also in layers burned body of chamber 2. Due to the flow of fluids from the well into the air chamber in the bottom of a created a sharp decrease in pressure (implosion), and pollution, in the form of pre-melted and paraffin sediments are removed from the well bottom-hole zone.
Provide examples of specific performance.
Example 1.
Air chamber 1 device for bottom-hole treatment wells, see Figure 1, is made of standard tubing diameter 73 mm and a length of 8 m and attached to it Luggage reception 2 is made from solid PVC pipe length is 1.4 m, wall thickness 4 mm with internal diameter of 66 mm The receiving chamber the combustion of composite material 3, speaking to an air chamber, fixed radial metal pins motionless relatively to its casing. Composite material with emitting at combustion 3, speaking to an air chamber 1, formed from the composition, comprising, mass%:
ammonium nitrate granulated grade B
45potassium dichromate
2epoxy resin brand ED-20
40plasticizer brand BUILDERS
3hardener Agidol brand AF-2M
10,receiving chamber of the device additionally contains gas and when combustion of composite material 4, which is formed from the composition, comprising, mass%:
ammonium nitrate
40powdered fluoro brand GFR-32
with dispersion 0.5-1.5 mm
10brand CP-1100
30fluoroplast marks the f-32L
10,for gas and the combustion of composite material 4 reception Luggage contains gassing agent during the combustion of composite material 5, which is formed from the composition, comprising, mass%:
ammonium nitrate
78powdered butadiene-nitrile
rubber with dispersion 0.5-1.5 mm
12potassium dichromate
10.To compare the characteristics of the device composite materials of chamber on the declared object, as the prototype, used the same mass, 5,5 kg
the combustion of composite material 3 of the reception chamber has a tensile strength of 90 MPa, density 1.40 g/cm3 and weight 0.5 kg Gas and the combustion of composite material 4 of the reception chamber has a density of 1.50 g/cm 3 , height 1000 mm, weight 4,0 kg Gassing agent during the combustion of composite material 5 of the reception chamber has a density of 1.55 g/cm 3 , height 120 mm, weight 0.5 kg
Examples of specific performance by example 2-4 same as in the example 1. Data for examples 1-4, specifying the characteristics of the proposed device and prototype are given in the table.
TableName compositions of composite materials and names of parts of compositions
Examples of specific performance
prototype
the declared object
№1 №2 №3 №4 1 2 3 4 5 6Composition the combustion of composite material:
Ammonium nitrate granulated grade B
45 45 46 45 46Potassium dichromate
2 2 1 2 1Epoxy resin brand ED-20
40 40 42 40 42Plasticizer brand BUILDERS
3 3 2 3 2Hardener Agidol brand AF-2M
10 10 9 10 9Continued of table
1 2 3 4 5 6Composition the combustion of composite material:
Ammonium nitrate granulated grade B
71Potassium dichromate
3Epoxy resin brand ED-20
20Plasticizer brand BUILDERS
2Hardener Agidol brand AF-2M
4The composition of the gas and the combustion of composite material:
Ammonium nitrate
50 50 40 40Powdered fluoro brand GFR-32 dispersion 0.5-1.5 mm
10 10 10 10brand CP-1100
30 20 10 20Fluoroplast marks the f-32L
10 20 40 30Composition the combustion of composite material:
Ammonium nitrate
78 85 85 78Powdered butadiene-nitrile rubber with dispersion 0.5 1,5 mm
12 12 12 12Potassium dichromate
10 3 3 10The device features
Weight acids in the numerator-the concentrated hydrochloric / in the denominator - hydrofluoric emitted during the combustion of one kg of composite materials, kg/kg
0/00,30/0,11
0,22/0,16
0,20/0,27
0,24/0,22
composite materials on the device's weight, %
10-15 3-5 2-4 4-5 4-5Specific heat of combustion of composite materials, kJ/kg
1800 1850 1860 1830 1800Specific gas formation of composite materials, m /kg
0,8 0,84 0,86 0,82 0,80Of data table shows that the combustion of 1 kg of composite materials filed object is allocated 0,11-0.27 kg hydrofluoric acid and 0.20-0.30 kg of concentrated hydrochloric acid, and at combustion of composite materials on a prototype acids are not highlighted. After the combustion of composite materials on the declared object is formed in 3-5 times less toxins, pollutants well, compared with the reference in this case indicators specific gassing and specific heat of combustion claimed object and prototype are on the same level.
Solution technical problems allows to increase the efficiency of the device due to the complex and chemical action of the bottomhole formation zone of oil well, reduce the weight of the device in 3-5 times, and simplify the manufacturer of the device by formation and gas and composite materials by extrusion.
Device for bottom-hole treatment of oil wells, including air chamber with atmospheric pressure and suction chamber made of light material, in which has a cylindrical composite materials, the combustion of composite material, speaking to an air chamber and fixed radial metal pins motionless relatively to the case of the reception chamber, formed of the composition, including, wt.%:
ammonium nitrate granulated grade B
45-46potassium dichromate
1-2epoxy resin brand ED-20
40-42plasticizer brand BUILDERS
2-3hardener Agidol brand AF-2M
9-10,and the combustion of composite material, wherein during combustion composite material formed from the composition, comprising, mass%:
ammonium nitrate
78-85powdered butadiene-nitrile
rubber with dispersion 0.5-1.5 mm
12potassium dichromate
3-10,and between and gas-generating the combustion of composite materials reception Luggage the device additionally contains gas and the combustion of composite material, which is formed from the composition, comprising, mass%:
ammonium nitrate
40-50powdered fluoro brand GFR-32
with dispersion 0.5-1.5 mm
10brand CP-1100
10-30Teflon mark the f-32L
10-40