Well drilling method |
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IPC classes for russian patent Well drilling method (RU 2557029):
 Device and method of drilling with continuous bit rotation and continuous drill mud supply / 2552743
Group of inventions relates to the device and method of drilling with continuous bit rotation and continuous drill mud supply. The device for drilling rig that contains the first drilling machine with top drive, installed with possibility of vertical movement along guide, and second drilling machine installed between the first drilling machine and well with possibility of the vertical movement along the guide regardless of the first drilling machine with top drive and provided with rotary table, able to withstand weight of the drilling string, rotation drive ensuring continuous rotation of the drilling string, and mud chamber ensuring liquid connection between end of the drilling string and unit for mud supply, at that the mud chamber is equipped with holes for the drilling string containing devices that can close holes for the drilling string ensuring liquid tightness. The second drilling machine is also equipped with the driven casing tongs that ensure connection and disconnection of the element and drilling string, at that the specified driven casing tongs are installed in the mud chamber and are made with possibility of vertical movement to connect/disconnect element and drilling string.
Well drilling method / 2547862
Method includes drilling of a well borehole by an assembly with the lower power drive and usage of a circulation fluid as a drilling mud. A loss zone is entered and drilling is transferred to the drilling mud, at entry to the loss zone rotary assembly or the upper power drive is switched, a drill string is rotated with a rate of 60-90 rev/min, consumption rate of the drilling mud is set equal to 18-20 l/s at the wellhead pressure of 1-2.5 MPa, the drilling mud is used with a viscosity of 60-90 CP, at the entry to the loss zone cuttings are introduced in a quantity up to 30% of the drilling mud volume and in the progress of the loss zone the passage quantity of cuttings in the drilling mud is reduced up to 8-12% at the loss zone end, the well is washed by the drilling mud without cuttings with a viscosity of 40-60 CP, with the consumption rate of 30-35 l/s and the wellhead pressure of 1-2.5 MPa and drilling is continued till the design reference mark.
Well construction method / 2541978
Method includes drilling by an assembly with a hydraulic downhole motor, periodical reciprocating of a drilling string in the complicated zone with simultaneous rotating. Drilling is performed by a bit having a diameter of 220.7 mm, a sloughing rock horizon is drilled and the drilling fluid is used with a density of 1.3-1.4 g/cm3, viscosity of 50-90 CP, load to the bit is maintained within limits of 10-15 t, the drilling fluid is injected with a rate of 32-45 l/s, the productive formation is entered to a depth of 1.0-1.5 m with a zenith angle of 75-85 degrees. The sting below assembly is lifted above the sloughing rock horizon, the process is withheld within 1-2 hours, and the assembly is lifted from the well, logging survey is performed and the same assembly is run in. At running in the setting intervals are worked out, the assembly is lifted out of the well, the production string is run in to the bottomhole with a lower section of casing pipes, a docking device and an upper section of drill pipes, the borehole annulus of the lower section is cemented, the upper section is disconnected from the docking unit, the upper section of the drill pipes is lifted and the casing string with a diameter of 177.8 mm is run with the length from the docking device up to the wellhead, the strings are lined up and the borehole annulus is cemented. A packed-hole assembly with a bit of a diameter of 155.5 mm is run in inside the production string, the interval of the sections line-up is worked out and drilling of the productive formation is continued.
 Drilling rig / 2541972
Invention is referred to drill rigs with movable rotary mechanism used for drilling of expendable wells. The drill rig includes mast, chain hoist for the string with movable rotary mechanism equipped with hydraulic chuck to retain drill pipes, chain hoist for drill pipe stands with elevator mounted above the chain hoist for the string and equipped with hydraulic chuck to retain drill pipe stands consisting of one or several pipes, carousel arrangement with circumferential cells for drill pipe stands, at that the above arrangement may be moved from the well axis and back, and stationary hydraulic pipe holder. Over chain hoist for the string with movable rotary mechanism there is identical chain hoist with movable straight-way making-up pipe holder coupled kinematically to the above one through two pairs of drive gear and having common reversible drive with it, in result when movable rotary mechanism moves upwards the making-up pipe holder moves downwards and vice a versa, a drill pipe stand pipe disconnected and connected to the string is taken by its upper end by hydraulic chuck of the elevator of chain hoist for drill pipe stands with elevator and removed from the carousel arrangement or accumulated in it with potential automation and synchronisation of operation for all elements the drill rig and alignment in time of working and idling operations for running in and out of drilling string and drill pipe stands as well delivery of the latter from the string to accumulation site and back. The drill rig provides drilling of wells with bore inclination at angle of 45-90° to the horizon.
 Well drilling device / 2540758
Invention is related to drilling, and namely to water extraction from bore wells using the well drilling device by percussion rotary drilling. The well drilling device by percussion rotary drilling comprises a chisel weight magnifier installed directly over the chisel - above-chisel bit weighting material - fixed to the drill stem and the chisel bit by means of adaptors. The chisel weight magnifier is made as a section of casing pipe, which can be installed at the drill pipe thrusted to the adaptor that connects the drill pipe with a chisel bit at the one side and connection by the adaptor with the drill string at the other side, at that the casing pipe section is centred in regard to the drill pipe by means of protective couplings while the space between these pipes is filled with lead pellet.
 Device for well drilling by application of rotary-percussion method / 2540675
Device includes a drilling bit weight enlarging mechanism installed immediately above the drilling bit - an above-bit weighting device - and attached to a drill string and to the bit by means of adapters. The bit weight enlarging mechanism is made in the form of a piece of a casing pipe that can be installed on a drill pipe so that it is borne against an adapter attaching the drill pipe to the bit on one side and connected by means of the adapter to the drill string on the other side; with that, a piece of the casing pipe is aligned relative to the drill pipe by means of safety couplings, and space between these pipes is filled with lead shots and electrorheological liquid and equipped with an electric field creation device increasing viscosity of electrorheological liquid when striking on the bit.
 Assembly drilling tool / 2528318
Drilling tool comprises a drill bit (2) connected to the drill rod (1) by a connector (3) of the drill bit. The drill rod is made of sections (11) of the drill rod. Each section of the drill rod comprises an inner section (111) of the rod and a hollow outer section (112) of the rod. The inner section of the rod is fixed with the ability of rotation in the outer rod section. The inner rod sections are joined together and form the inner rod (11') of the drill rod. The outer rod sections are connected together and form the outer rod (12') of the drill rod. The inner rod is connected to the output shaft of the power unit, and the outer rod is rigidly connected to the housing of the power unit.
 Drilling of horizontal wells in highly porous rocks / 2526032
Invention relates to drilling. Method of drilling the inclined and horizontal wells in highly porous rocks comprises generation of pressure difference in well-formation system by changing the flushing fluid density. To increase drilling rate by differential use of pressure difference range, additional pressure difference is created by increasing flushing fluid density.
Construction of oil production well / 2524089
At construction of production well, vertical shaft is drilled through rocks, including unstable mud shale, with entry into productive seam, going-in of production string to productive seam, cementing of annular space and drilling the shaft from production string into productive seam. At exposure of horizon with unstable mud shale, mechanical drilling rate is set not over 6 m/h for drilling with increased flushing fluid flow rate of about of 30-40 l/s using drilling solutions with density of 1.12-1.40 g/cm3. After well shaft drilling, drilling assembly performs cleanup job over well shaft with working of the shaft by rotary machine at rotor rpm of 40-100 rpm. Drilling fluid mixed with fibres in amount of 6-15 m3 is forced through the shaft and drill assembly reciprocates over the length of drive pipe. For well shaft casing operation string is lowered section-by-section. First 400-1000 m long section is lowered to well bottom on drill tool and annular space if cemented in interval from bottom to first section head. Cement is cured to lower production string second section. Sections are coupled, annular space is cemented and cement is cured. Production string is sealed.
 Plant for rock drilling and method for motion over slope / 2522210
Proposed plant comprises mobile running gear and drive hardware not including the ICE. Drive hardware comprises drive motor, elements to transfer power between drive motor and drive wheel, electrical system, pressurised working fluid system, jib moving along running gear and equipped with rock drilling machine and control unit. Control unit incorporates systems control algorithm. Drive motor serves as the generator and the main brake at long-term motion over the slope. Control unit can control electrical system and electric power generated at downslope motion for charging of storage battery. Proposed method consists in plant braking at long-term motion over the slope by drive motor solely. Storage battery is charged. Electric power is converted to pressure energy in response to demand in excess power, increasing the plant maximum speed at downslope motion.
Device and method of drilling with continuous bit rotation and continuous drill mud supply / 2552743
Group of inventions relates to the device and method of drilling with continuous bit rotation and continuous drill mud supply. The device for drilling rig that contains the first drilling machine with top drive, installed with possibility of vertical movement along guide, and second drilling machine installed between the first drilling machine and well with possibility of the vertical movement along the guide regardless of the first drilling machine with top drive and provided with rotary table, able to withstand weight of the drilling string, rotation drive ensuring continuous rotation of the drilling string, and mud chamber ensuring liquid connection between end of the drilling string and unit for mud supply, at that the mud chamber is equipped with holes for the drilling string containing devices that can close holes for the drilling string ensuring liquid tightness. The second drilling machine is also equipped with the driven casing tongs that ensure connection and disconnection of the element and drilling string, at that the specified driven casing tongs are installed in the mud chamber and are made with possibility of vertical movement to connect/disconnect element and drilling string.
 Processing method of drilling wastes on territory of cluster site / 2551564
Invention relates to construction and processing (deactivation) of drilling wastes together with secondary wastes of thermal utilisation of oil slurries with ash and slag mixtures so that road-building composite materials are obtained. The task at which this invention is aimed is to create a processing method of drilling wastes on the territory of a cluster site. The processing method of drilling sludge on the territory of the cluster site involves arrangement at the site of components of the mixture and a processing capacity, placement of drilling sludge into the capacity, addition to the sludge of components and mixing of the mixture with an excavator so that road-building composite material is obtained; with that, the processing capacity is installed into soil so that its upper edge is elevated above relief to the height of not more than 0.5 m.
 Method and system for drilling acceleration by use of drill string vibration / 2550628
Set of inventions relates to drilling. Proposed system comprises the components that follow. Downhole device for decreasing of drill string vibration and injection and superhigh-pressure drill bit for downhole injector. Said downhole device for decreasing of drill string vibration and injection includes high-pressure channel. Said superhigh-pressure drill bit comprises channel to transfer superhigh-pressure mud fluid. Said channel to transfer superhigh-pressure mud fluid comprises superhigh-pressure mud fluid channel, high-pressure hose and high-pressure stiff pipe. Said high-pressure channel communicates with superhigh-pressure mud fluid transfer channel. One end of said high-pressure hose is connected with said superhigh-pressure mud fluid channel while opposite end of said hose is connected with high-pressure stiff pipe. Opposite end of said high-pressure stiff pipe is connected with superhigh-pressure mud fluid nozzle. Method for decreasing of drill string vibration uses the source of power generated by pressure oscillation at drill bit body. Besides, it exploits mud fluid forced into downhole device for decreasing of drill string vibration and injection after shunting by shunting mechanism. Note here that major part of mud fluid is forced through common pressure nozzle. Mud fluid remainder is forced to power converter via intake one-way valve in said downhole device for decreasing of drill string vibration and injection. Power source and power produced thereby are used to release mud fluid minor portion via discharge one-way valve connecting the high-pressure channel. Besides, superhigh-pressure mud fluid nozzle generates superhigh-pressure jet to facilitate rock destruction directly or indirectly. Power converter is composed of seal assembly, injection cylinder and cylinder guide bush.
Well drilling method / 2547862
Method includes drilling of a well borehole by an assembly with the lower power drive and usage of a circulation fluid as a drilling mud. A loss zone is entered and drilling is transferred to the drilling mud, at entry to the loss zone rotary assembly or the upper power drive is switched, a drill string is rotated with a rate of 60-90 rev/min, consumption rate of the drilling mud is set equal to 18-20 l/s at the wellhead pressure of 1-2.5 MPa, the drilling mud is used with a viscosity of 60-90 CP, at the entry to the loss zone cuttings are introduced in a quantity up to 30% of the drilling mud volume and in the progress of the loss zone the passage quantity of cuttings in the drilling mud is reduced up to 8-12% at the loss zone end, the well is washed by the drilling mud without cuttings with a viscosity of 40-60 CP, with the consumption rate of 30-35 l/s and the wellhead pressure of 1-2.5 MPa and drilling is continued till the design reference mark.
 Well flushing method / 2541984
While implementing the method a tubing string is run in to a well up to a bottomhole with a tube having a diameter more than the diameter of the tubing string with triangular windows and inner sharp tabs faced upwards under an angle of 25-30° to the vertical, circulation of the borehole fluid with a consumption rate within limits from 3.5 up to 8 l/s through the annular space, tube and tubing string through a holding tank in the volume not less than the well volume and lifting of the tubing string with the tube from the well.
Completion method of horizontal well / 2541979
Method includes drilling of a well, running in of a production string to a horizontal part of the well with a mud-inflatable packer, a stop ring and a stage cementing collar at the end, injection of the cement grout to the annular space, the process withhold for the time of the cement hardening, drilling of the stop ring and collar and the well development. At running in the production string is stopped at a distance from the bottomhole, drilling of the stop ring and collar is made with the usage of a drilling fluid with a density from 1.20 up to 1.25 g/cm3, it is injected with a rate of 18-21 l/s at a pressure of 8-10 MPa at the wellhead. The interval from the production string end till the bottomhole is worked out by a bit, the well is washed by the drilling fluid at a wellhead pressure of 8-10 MPa, a filtering string of a low diameter is run in through the production string and an interval from the bottomhole until the production string is covered with partial covering of the production string end; the filtering string remains in the interval of the productive formation. At running in the production string is stopped at a distance from the bottomhole equal to 50-150 m. Partial covering of the production string end by the filtering string is made per 5-10 m.
Well construction method / 2541978
Method includes drilling by an assembly with a hydraulic downhole motor, periodical reciprocating of a drilling string in the complicated zone with simultaneous rotating. Drilling is performed by a bit having a diameter of 220.7 mm, a sloughing rock horizon is drilled and the drilling fluid is used with a density of 1.3-1.4 g/cm3, viscosity of 50-90 CP, load to the bit is maintained within limits of 10-15 t, the drilling fluid is injected with a rate of 32-45 l/s, the productive formation is entered to a depth of 1.0-1.5 m with a zenith angle of 75-85 degrees. The sting below assembly is lifted above the sloughing rock horizon, the process is withheld within 1-2 hours, and the assembly is lifted from the well, logging survey is performed and the same assembly is run in. At running in the setting intervals are worked out, the assembly is lifted out of the well, the production string is run in to the bottomhole with a lower section of casing pipes, a docking device and an upper section of drill pipes, the borehole annulus of the lower section is cemented, the upper section is disconnected from the docking unit, the upper section of the drill pipes is lifted and the casing string with a diameter of 177.8 mm is run with the length from the docking device up to the wellhead, the strings are lined up and the borehole annulus is cemented. A packed-hole assembly with a bit of a diameter of 155.5 mm is run in inside the production string, the interval of the sections line-up is worked out and drilling of the productive formation is continued.
 Method of washover of horizontal well / 2536723
Method comprises the creation of drilling fluid circulation using the direct layout of washover by pumping through the drilling pipe string with bit, lowered into a well of main drilling fluid and drilling fluid with viscosity, ensuring the increased cutting-carrying capacity. An aerated flush fluid is used as a drilling fluid. During washover with aerated flush fluid the drilling pipes are lowered at the axial speed 20 m/h and at rotational speed 40 rpm. After passing of each 5 m the string lowering is paused and it is raised by 2 meters, the circulation with aerated flush fluid is performed at increased flow rate during 15 minutes, then the lowering is continued. Polymeric bars from acrylic copolymer, soluble paper and soluble cork soluble in aerated flush fluid are used as a drill fluid with the increased cutting-carrying capacity. Bars are thrown off into the pipe string from the wellhead at extension of each pipe of the drill column, starting from the interval of build angle of open borehole above higher 40 degrees at washover of horizontal well and until achievement of the open borehole foot.
 Device for well bottom flushing / 2529067
Device comprises cylindrical case with inner cavity, thrust ring and valve. Said cylindrical case can be secured to tubing. Note here that case thrust ring has high-pressure channel for hydraulic communication of cylindrical cavity with hole annuity. Half the circumference of cylindrical case bottom end is composed by saw-like ripper while another half has skew cut. Case thrust ring on ripper side has at least two high-pressure channels, aligned with case axis. Hole is made in the case thrust ring on skew cut side, off centre of case axis. Valve arranged inside the case opposite said bore to allow the down-up flow is composed of valve box with ball fitted in thrust ring bore. Valve box is rigidly secured to thrust ring.
 Method for borehole bottom flushing / 2527433
Method includes flow string running to the borehole bottom with a wing at the end till it gets into sump contamination, pumping of flushing fluid through the string and its withdrawal through borehole tubular annulus. A ripper is made at the lower end wind. Inside the wing there is a partition with openings of smaller diameter made off-centre over the ripper. Opposite the openings of smaller diameter in the partition there is an opening of a bigger diameter and a return valve with a valve cage is installed over the partition, at that the valve passes fluid bottom upwards. The flow string is run in to the well; rotation of the flow string is made simultaneously with injection of flushing liquid through openings of smaller diameter and liquid lifting through tubular annulus. The return valve is closed. Rotation of the flow string with injection of flushing liquid is continued till the tubing hanger is unloaded in place per 10 kN. Then rotation and injection are stopped. Flushing direction is changed and flushing liquid is injected through tubular annulus under pressure that does not exceed the permitted value. Ripped and eroded sludge is lifted through the flow string till weight of the tubing hanger is recovered. Working operations are repeated.
 Well-drilling device / 2250343
Device has column of double drilling pipes, pilot chisel, expander with body, mounted on double drilling pipes column with possible axial displacement and combined rotation. It is provided with subs, made in form of additional double drilling pipes with outer profiled surface. Expander body is provided with spring-loaded stop for supporting subs. Expander with body is mounted with possible axial displacement and rotation by profiled connection. Expander body is provided with stabilizer. Expander and stabilizer are made detachable.
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FIELD: oil and gas industry. SUBSTANCE: method includes the rotation and axial delivery of an assembly with a bit and supply of a flushing fluid through an inner cavity of the assembly to the bottomhole, in the flushing fluid loss zone the transfer of the fluid supply to an annular space over the downhole motor through the cross-over shoe by its activating. At the transfer of the fluid supply in the flushing fluid loss zone the isolating compound is supplied at a pressure of 2-6 MPa, flow rate of 8-12 l/s in a volume of 10-30 m3, upstream the injection volume drilling mud is placed, the assembly is put up to the drilling mud zone, pressure up to 3 MPa is generated in the annular space, the isolating compound is flushed to the loss zone in the full volume, the process is withhold until the isolating compound is set and hardened, the cross-over shoe is deactivated, circulation is restored and injection capacity is defined. If the injection capacity is less than 2 m3/h the drilling process is renewed. EFFECT: increased efficiency of isolation for the flushing fluid loss zones at well drilling.
The invention relates to oil industry and can find application in drilling. The known method of drilling a well comprising rotating and axial flow layout with a chisel and a flow of washing fluid from the internal cavity layout using a chisel on the bottom, in the zone of absorption of the washing liquid part of the flow of washing fluid from the internal cavity layout is directed into the annulus above the bit (Patent RF №2024723, CL. AV 21/00, publ. 15.12.94). The disadvantages of this method include the precariousness of work in the areas of washing fluid absorption, especially intensive care washing liquid, because pressed in permeable wall of the borehole filter cake does not lead to clogging of the disclosed channels of the absorbing species. The known method of drilling a well comprising rotating and axial flow layout with a chisel and a flow of washing fluid through the internal cavity of the layout on the bottom, in the zone of absorption of the washing liquid serves the entire flow of washing fluid in the annular the annular space above the chisel (Patent RF №2024729, CL. AV 21/00, publ. 15.12.94). The disadvantages of the known method include the technical complexity of practical implementation because of the high probability of sticking of the bit in line in the order book, which his floor�the spine of the covers. The closest to the proposed invention the technical essence is a way of opening the seams, including the rotation and axial feed of the layout with a chisel and a flow of washing fluid through the internal cavity of the layout on the bottom, in the zone of the productive layer flow the total flow of drilling fluid into the annulus of the well. Opening with the flow of washing fluid through the internal cavity of the link at the bottom leads to the roof of the productive strata, without opening them, is lowered and cemented the casing with wedge seat ring in a Shoe part, continue opening the flow of washing fluid through the internal cavity of the link at the bottom to the reservoir at the opening of the productive formation divide the annulus of the well above the productive formation, the flow of the entire flow of washing fluid through the internal cavity of the composition in the annulus of the well above the point of separation, simultaneously set in the annulus below the separation of the low blood pressure and depression on productive layer and ejection liquid with the sludge from the bottom through the internal cavity of the composition in the annulus above the point of separation, mix with the flush liquid and sent to the mouth of the well. For drilling use the layout on�consisting of a first sub of the drill string and bit. In the side surface of the sub installed destructible membrane, and below it - the saddle and the locking element with a Central hole (patent RF №2279535, CL. AV 21/00, EV 10/18, publ. 10.07.2006 - prototype). When drilling in the area with a washing liquid absorption throw the locking element in the drill column. The increased pressure destroys the membrane and the portion of the stream through a side opening of the sub. On the bottom, causes accumulation of sludge and the formation of a thick mixture of cuttings and mud. Reaming elements bit pressed sludge solids and the mixture in the well wall. Occurs clogging of pores of the reservoir, preventing the absorption of the washing liquid. The disadvantage of this method is the unreliability of work in the areas of washing fluid absorption, especially intensive care washing liquid, because pressed in permeable wall of the borehole filter cake does not lead to clogging of the disclosed channels of the absorbing species. The invention solves the problem of increasing the efficiency of the isolation zones absorption of washing fluid during drilling operations. The task is solved in that in the method of drilling a well comprising rotating and axial flow layout with a chisel and a flow of washing fluid through the internal cavity of the layout on the bottom, in the zone of absorption rinsing�: fluid transfer fluid in the annulus above the bit, according to the invention when transferring liquid in the absorption zone as the fluid serves the insulating composition at a pressure of 2-6 MPa, the flow rate of 8-12 l/s in the amount of 10-30 m3above the pumping volume is placed drilling mud, pick up the layout in the area of drilling fluid, creating pressure up to 3 MPa in the annulus, forced the insulating composition in the absorption zone in the volume of the insulating structure, conduct technology exposure to the setting and hardening of the insulating composition, deactivates the sub, restore circulation and determine the acceleration, when the acceleration is not more than 2 m3/hour restore the drilling process. Summary of the invention When drilling a particular challenge is called area care washing liquid. Despite the development, the problem of drilling through areas full or partial care of the washing liquid remains unsolved. In the proposed invention solves the problem of increasing the efficiency of the isolation zones absorption of washing fluid during drilling operations. The problem is solved as follows. When drilling is carried out rotation and axial feed of the layout with a chisel and a flow of washing fluid through the internal cavity of the layout at the bottom. In the zone of washing fluid absorption stimulate the sub, located� above a downhole motor. Translate flow of fluid from the bit in the annulus above the downhole motor. As fluid from the well bore via the drill pipe serves the insulating composition at a pressure of 2-6 MPa, the flow rate of 8-12 l/s in the amount of 10-30 m3. Chosen mode of feeding of the insulating composition is optimal from the point of view of filling in the zone of absorption and prevent complete withdrawal of the composition in the absorption zone. Higher volume injection post drilling mud. Raise layout to the area of the drilling mud to prevent seizing of the layout of hardening the insulating composition. Create pressure to 3 MPa in the annulus and forced the insulating composition in the absorption zone in the volume of the insulating composition. Pressure up to 3 MPa allows crushing of the insulating composition in the absorption zone at sufficient insulation depth without full care composition in the absorption zone. Conduct technology shutter speed for setting and hardening the insulating composition. Deactivate the sub and restore circulation of washing fluid through the drill pipe through the bit. Determine the injectivity of the well. If you pick no more than 2 m3/h is considered the zone of absorption zaizolirovali. Restore the process of drilling and gaboriaud well to the design level. Examples of specific performance Example 1. Drilled squag�well with the application layout with a downhole motor, a chisel and a sub mounted on the downhole motor. Carry out the rotation and axial feed of the layout with a chisel and a flow of washing fluid through the internal cavity of the layout at the bottom. In the zone of absorption of the washing liquid at a depth of 1530 m activate the sub is located above the bit. Translate flow of fluid from the bit in the annulus above the downhole motor. As fluid from the well bore via the drill pipe serves an insulating composition including a filler in the form of crumb rubber - 0.07 t, the biopolymer - 0,03 t, lime - 0.1 t, at a pressure of 2 MPa, flow rate 8 l/s in a volume of 10 m3. Above the pumping volume placed clay drilling mud density 1.65 g/cm3. Raise the layout in the area of drilling mud. Create a pressure of 2 MPa in the annulus and forced the insulating composition in the absorption zone in the volume of the insulating composition. Conduct technology shutter speed for setting and hardening the insulating composition for 2 hours. Deactivate the sub and restore circulation of washing fluid through the drill pipe through the bit. Determine the injectivity of the well. Acceleration is 2 m3/h. Consider the area of absorption zaizolirovali. Restore the process of drilling and gaboriaud well to the design level. Example 2. Perform as if�EP 1. In the zone of absorption of the washing liquid at the depth of 1532 m activate the sub is located above the bit. Translate flow of fluid from the bit in the annulus above the downhole motor through the sub by its activation. As fluid from the well bore via the drill pipe serves an insulating composition comprising a clay solution with a density of 1.3 g/cm3containing fibrous filler in the form - Cordoba fiber at the rate of 2,0 m310 m3solution, at a pressure of 6 MPa, flow rate 12 l/s (30 m3. Above the pumping volume placed clay drilling mud density 1.6 g/cm3. Raise the layout in the area of drilling mud. Pressure of 3 MPa in the annulus and forced the insulating composition in the absorption zone in the volume of the insulating composition. Conduct technology shutter speed for setting and hardening the insulating composition for 2 hours. Deactivate the sub and restore circulation of washing fluid through the drill pipe through the bit. Determine the injectivity of the well. Throttle response is equal to 1 m3/h. Consider the area of absorption zaizolirovali. Restore the process of drilling and gaboriaud well to the design level. Example 3. Perform as example 1. In the zone of absorption of the washing liquid at the depth of 1531 m activate transl�DNIC, located above the bit. Translate flow of fluid from the bit in the annulus above the downhole motor through the sub by its activation. As fluid from the well bore via the drill pipe serves an insulating composition comprising a clay solution with a density of 1.4 g/cm3containing crumb rubber based 3,0 m310 m3solution, at a pressure of 4 MPa, the flow rate of 10 l/s in a volume of 20 m3. Above the pumping volume placed clay drilling mud density 1.5 g/cm3. Raise the layout in the area of drilling mud. Create a pressure of 2.5 MPa in the annulus and forced the insulating composition in the absorption zone in the volume of the insulating composition. Conduct technology shutter speed for setting and hardening the insulating composition for 2 hours. Deactivate the sub and restore circulation of washing fluid through the drill pipe through the bit. Determine the injectivity of the well. Throttle response is $ 0. Consider the area of absorption zaizolirovali. Restore the process of drilling and gaboriaud well to the design level. The result is a fully insulated area of absorption without the use of tripping on replacement drill layout on flushing. Application of the proposed method will allow to solve the problem of increasing the efficiency�spine isolation zones absorption of washing fluid during drilling operations. Method of drilling a well comprising rotating and axial flow layout with a chisel and a flow of washing fluid through the internal cavity of the layout on the bottom, in the zone of absorption of wash liquid transfer fluid in the annulus above the downhole motor through the sub by its activation, characterized in that when transferring the fluid into absorption zone as the fluid serves the insulating composition at a pressure of 2-6 MPa, the flow rate of 8-12 l/s in the amount of 10-30 m3above the pumping volume is placed drilling mud, pick up the layout in the area of drilling fluid, creating pressure up to 3 MPa in the annulus, forced the insulating composition in the absorption zone in the volume of the insulating structure, conduct technology exposure to the setting and hardening of the insulating composition, deactivates the sub, restore circulation and determine the acceleration, when the acceleration is not more than 2 m3/hour restore the drilling process.
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