Earth or rock drilling; mining (E21)

Filter for mud cleaning

Filter for mud cleaning includes a body with mud inlet tubes and cleaned mud outlet tubes, a filtering element for solution treatment. The inlet and outlet tubes with maximum possible diameter are installed coaxially. The body is equipped with a sealed cover for installation of the filtering element made as a cassette with parallel rods, which are used as support for zigzag installation of the filter screen. On the opposite side of the cover in the body there is a sealed chamber with heat medium inlet and outlet tubes.

Method and device to improve reliability of point stimulation

Group of inventions is related to underground hydrocarbon inflow stimulation and more specifically to devices improving reliability of point stimulation. Essence of inventions: the invention envisaged pumping of liquid through a stimulator, bypassing of at least a part of the liquid through the stimulator, bypassing of at least a part of the liquid from the stimulator to an anchor unit connected to it so that they can communicate. At that the anchor unit includes housing with a movable former and a one-way restrictor movable inside the former. The one-way restrictor inside the former can be placed to the first position in which the restrictor passes a limited amount of the liquid through the housing. The liquid can be also introduced from the anchor unit in order to install a sand plug at the predefined position and to divert the liquid flow in this position by means of a sand plug.

Device for making perforation tunnels in well

Device for making perforation tunnels in a well which is installed at the casing string includes a body, a wedge with groove, a hydraulic cylinder and at least one operating device with jet tunnel placed at the support groove and the wedge with potential radial reciprocative movement. The wedge is installed above a piston of the hydraulic cylinder where the support of the operating device is fixed and the cavity below the piston is communicated by means of tubes with jet tunnel of the operating device and the cavity over the cavity of the operating fluid delivery.

Rock drilling plant and method of its positioning

Set of inventions relates to drilling plant positioning and to drilling plant. Proposed method consists in displacing the drilling plant over the rock by driving equipment without ICE. Drive motor generates required torque to be transmitted via mechanical gearing to drive wheel. Drilling plant is positioned by rock at drilling site in the case of rough or inclined surface of motion. Motor is used for displacement and stoppage of the plant at positioning. Ratio between drive motor rpm and drive wheel rotary speed at displacement of the plant at positioning is kept constant irrespective offload variation by torque. Rock drilling plant comprises carrier, drive equipment without ICE. Drive equipment comprises drive motor, control device, gearing elements, manipulator jug, rock drilling machine, control unit, mechanical gearing with antiskid component between drive motor and drive wheel and speed measuring device.

Erection of artificial supports in open areas

Proposed method comprises erection of framework and filling it with solid stowing material. Note here that said framework in chamber mined-out space is made of used tires. Said tires are laid in piles from soil to course roof, interconnected and filled with rock. Then, sealing coat is laid on framework over contact with roof to feed solid solution via hole in said coat. After cementation of said solution, said chamber is isolated from adjacent courses by webs and filled with hydraulic fill.

Drilling machine

Invention relates to drilling, particularly, to machine designed to drill wells in soil. Machine comprises carrier with hydraulic feed device, mast, skids displacing along said mast and skids driving hydraulic cylinder with piston with rod sliding therein. Note here that piston rod is secured at the mast while cylinder body is secured at said skids. One hydraulic control valve is secured at said skids and connected via at least one feed line and at least one central drain line with hydraulic feed device. Said hydraulic control valve is equipped with at least one hydraulic cylinder connector and at least one extra connector for drive motor at skids. Hydraulic cylinder is connected via hydraulic connector for hydraulic cylinder at skids with hydraulic feed device.

Laser-mechanical drilling of silica-bearing materials

Laser radiation is fed to bore face is delivered via quartz optical 0.2-1 mm dia fibre. Optical fibre is locked in pipe along the drilling tool inner space axis. Note here that radiating end of optical finer is spaced from ribbed bit cutters end surface for h≤d0/[2tg(arcsinNA)], where d0 is ribbed bit cavity diameter, NA is optical fibre numerical aperture. Protective gas flow is forced in circular gap between optical finer surface and pipe inner surface towards the face. Said face is irradiated with laser beam with radiation sport at face surface of diameter smaller than that of ribbed bit OD by (0.6÷2)Δ, where Δ=(20÷35)/q is depth of thermally weakened material layer (cm), q=P(l-R)(l-ρ) is absorbed laser radiation density (W/cm2), P is power density of incident laser radiation (W/cm2), R is the factor of reflection from material surface, ρ is heat loses from radiation from heated material. For this, prior to irradiation drill tool end surface is set at L=[D-d0-(0.6÷2)Δ]/[2tg(arcsinNA)] from face surface, where D is ribbed bit OD. Drilling is conducted in intermittent manner. In every cycle, face surface is irradiated for t=(45000÷130000)/q2 (s), for face surface heating to material fusion and boiling temperature. Then, face surface is cooled by coolant for 1-15 s at heat exchange factor of 300÷5000 W/m2·deg. Then, drill tool is displaced towards the face till the contact therewith by ribbed bit end cutters. Lengthwise forces are applied to mechanically crush said thermally weakened material to depth Δ with simultaneous forced removal of slime from face zone. Thereafter drill toll is shifted from face surface for distance L. Drill cycles are reiterated unless preset bore depth is reached.

Drilling machine adapter and drilling machine

Tip adapter (2) comprises long body (4) with outer and inner surfaces. Outer surface first part (17) is furnished with first antirust coat while second part of outer and/or inner surface is provided with second antirust coat. First antirust coat is a chromium ply while second antirust coat is a conversion ply. Note here that said conversion ply contains zinc phosphate zing and manganese phosphate or manganese phosphate. Conversion ply is oiled or polished with wax paste. Besides, invention covers the drilling machine with tip adapter (2).

Method of tunnelling

Several blast holes are drilled over tunnel contour. Then, several blast holes are drilled by diamond drilling at preset points inside said contour. Blast holes are connected by zones cut by diamond discs at fastening the cutting machine in blast holes. Separate blocks are produced to be destructed by wedge jacks. Lower and upper parts of blocks formed between said zones are cut off by diamond cable in the following order: diamond cable is fitted on rotary tool and rollers to be secured inside predrilled blast holes. Note here that said rotary tool is secured opposite said rollers. Then, said rotary tool is activated to make diamond cable move for cutting of blocks.

Method of underground gasification

Proposed method comprises well drilling from surface into processed interval in underground sea, placing the electrodes in the wells, application of voltage to said electrodes and heating of the seam of Joule heat. Voltage sufficient for producing of partial discharges and treeing is applied to electrodes to make the channel of electric-heat disruption of the seam, its formation being used for conclusion about decreased in electrode dap resistance. Then, current is passed via said channel of electric-heat disruption of the seam.

Control method of oil pool development

Method includes allocation of a pool area with wells intercoupled hydrodynamically, extraction of the product from producers with production rate analysis, injection of a displacement agent to injectors with definition of well interference contours and correction of the production rate for the producers. According to the invention production rate analysis and injection of a displacement agent to injectors is made on the basis of detected intercoupling with the respective producers against their total production rate at actual operation at the allocated areas using archive databases and current data for the whole optimisation period with increment of 1-3 months. By production rate control in the producers the volume of injection to the injectors is changed and redistributed considering impact of the respective producers and injectors. At that the total volume of injection is changed not more than per 10%. Remaining reserves are worked out using the available stock of wells with increase of total production rate of the producers and decrease in water cut or maintenance of this value at the current level.

Selective multistring packer module

Downhole equipment comprises casing, two flow channels, seal sliding at said casing, wedge grip assembly supported at said casing, channel in said casing and intermediate module. Note here that said intermediate module allows fluid flow between channel in the casing and one of two lengthwise flow channels.

Hydraulic jack for installation of shutter in well

Proposed device comprises pipe string for running, hollow hydraulic cylinders, circular pistons with hollow rods aligned in appropriate hydraulic cylinders to displace axially therein and mandrelling head for fitting of shutter. Hydraulic cylinders are connected from above with pipe string. Hollow rod is connected from below with mandrelling head. Every circular piston is composed by a sleeve with ring bulge with self-packing glands locked at this sleeve from top and bottom. Bulge outer surface is composed by ring belt. Rods of pistons are interconnected for limited radial and angular displacement.

Anchor and hydraulic setting device in assembly

Suggested group of inventions is related to downhole tools and may be used for actuation of anchors of the well liners. The anchor bend includes a non-deformable cylindrical anchor former, an expandable metal bushing movable along the external surface of the anchor former and a cylinder-shaped sub. At that the cylinder-shaped sub is supported by the external surface of the anchor former for the purpose of its axial movement from the first position which is the closest position to the bushing in axial direction to the second position under the bushing so that in result of the above sub movement the bushing can be expanded outside in radial direction.

Method of bottomhole support in sand wells

Method of bottomhole support in the formation with unstable rocks includes generation of a filter by preparation and injection of the polymer composition to the bottomhole zone. Before and after these operations a solution is injected which makes 10-30% by volume of the polymer composition. Thereafter the well is blown by a flow of gas and withhold for the composition reacting and curing. At that a mixture of silicone resin and solution Chimeco-P is used as the polymer composition in quantity of 95.0-98 wt %: hardener AGM-9 - 5-.0-2.0 wt % representing aminopropyltriethoxysilane. A mixture of xylol or a mixture of rectification residues KORE in quantity of 0.0-100 wt % and aromatic solvent Nefras A in quantity of 100.0-0.0 wt % is used as the solvent.

Creation of filling massif at development of deposit under permafrost conditions

Proposed method comprises construction of drainage dam, erection of pulp duct, feed of backfill pump and drainage of water via drain openings in bulkheads mounted on the side opposite the pulp feed. Drainage pipes in soluble airtight shell are fitted in filled goaf. Cooled compressed air is fed to said pipes at the feed of filling pulp. Note here that dressing tails thickened to pasty state are used as a filling pulp.

Hydraulic site for coal seam mining with underground closed-cycle water supply

Invention relates to mining and can be used for hydraulic process of coal production. Main and auxiliary openings are driven via tandem and/or single faces that delineate blocks, barrier and safety pillars. Water is forced into faces by pump stations after cleaning at drainage complexes, mechanised settlers and/or water headers. The latter are located in intercommunicated chambers located at lower points of hydraulic site blocks and exiting into accumulation openings via which hydraulic transport is performed and rock is discharged. Abandoned pillars are liquidated after working of extraction pillar at backstroke in tow-side or single-side cuts. Water is cleaned at mechanised settlers and/or water headers with application of combination of water cleaning technical means and processes. For this, used are, for example, water impermeable partitions with water bypass nearby bottom, thin-layer clarifiers, flotation, coagulation, water processing by constant pulsating current, etc.

Access ramp for trucks in open-pit mine

Access ramp for trucks in open-pit mine combined with inclined safety berm of open-pit mine includes empty and loaded branches and additional ramps to safety berms of open-pit mine located on side slopes of ramp for trucks. Herewith, empty and loaded branches of access ramp for trucks are separated and located in different half-trenches the bases of which are inclined safety berms of open-pit mine replacing sections of horizontal safety berms of open-pit mine along path of ramp for trucks and interconnected by additional ramps for auxiliary equipment located on side slopes of half-trenches, and additional ramps connecting access ramp for trucks with safety berms of open-pit mine are located at both sides of it.

Powered roof support for steep seams

Powered roof comprises basic and linear sections. Note here that manipulator with grippers is mounted at basic section base to displace said linear section after face advance and for installation and dismantling works. Besides, basic section goaf guard is composed of sliding pneumatic blade with the set of air cushions makes a thrust element that cuts off rock structures hung above the stull. Linear section incorporates air post as a thrust composed by a polymer film sleeve reinforced by polymer rings to rest on hardware compartment capsule. Linear section beam is coated with resilient polymer ply to facilitate the contact between lining and roof block structures.

Reservoir recovery improvement method

Invention relates to the field of oil production, in particular, to well stimulation methods. The well stimulation method include running in the source of pulsed infrasonic radiation at a logging cable to the well. The source is installed opposite the productive formation in the well perforation interval. Hydraulic impact is made. At that the source of pulsed infrasonic radiation represents a cable infrasonic hydrovibrator that includes a hollow body with a pair of pistons made of non-magnetic material and placed in its cavity. A compression spring is placed between the pistons. The body is equipped with openings placed at the body ends and in the spring area. Each piston is placed inside a coil. Hydraulic impact is made due to high-speed ejection of liquid jets from the source of pulsed infrasonic radiation when a control signal is sent from the pulse current source.

Hybrid drill bit with variable cutter ledge

Set of inventions relates to hybrid drill bits. Drill bit comprises bit body with nose, flexure part and gaging part. Besides it has several fixed cutting elements secured to said body to define fixed cutter profile and roller cone secured to said body and having several cutting elements to define the roller cone profile. Fixed cutter profile extends beyond the roller cone profile at, at least its one part while roller cone profile extends beyond the fixed cutter profile at, at least one its part.

Threaded connection of drill pipes

Invention relates to drilling engineering and refers mainly to threaded connection of drill pipe joints used for geological surveying and oil well drilling. The threaded connection consists of a sleeve, a nipple and a slotted spring installed between the sleeve lip and thrust face of the nipple. At that a gap is formed between the sleeve lip and the nipple thrust face, this gap is liquidated in process of the connection tightening and spring compression and it is equal to the spring pitch and according to its parameters it corresponds exactly to the preset axial load to the inner thrust joint. Upon tightening of the connection the exact axial loads is provided to the outer thrust joint. Reliable functioning of both thrust joints allows increasing axial force of the threaded connection 1.5 times and improving its statistical strength and cyclic life.

Determination of rock specimen mechanical properties

Specimen is loaded by two spherical indenters directed in opposition till its cracking. Destructive force is registered to define cracking surface area in destructed specimen that extends through loading axis, geometrical parameters of destructed zones in areas of contact with spherical indenters, specimen rupture stretching stress and mean compressive stress at the boundary of the larger of destructed zones are calculated. Breaking point and shear resistance are defined as mechanical properties of the specimen. Debris of crushed specimen are used to compose a composite specimen for determination of geometrical parameters of crushed zones at the ends of said composite specimen. Diameter of residual marks of indenters and indent hole length along fracture surface are defined. Surface area of larger destructed zone at contact with indenters, breaking point at uniform stretching, maximum shear resistance and Poisson factor are defined by the formulas.

Skid yoke

Skid yoke comprises body with handle and mouth for drill string. It differs from known designs in that said body has channels made on both sides of the mouth, parallel with its sidewalls and arc-like slot at its top end connected with one channel of the body. Note here that said yoke incorporates L-like rod retainer to close the retainer case mouth. Retainer crosswise part is secured at one of body channels to turn thereabout. Opposite end of said retainer is furnished with stop arranged in working position at another channel of said body. Note here that retainer stop is composed by rod with head, detachable disc and spring arranged between disc opposite faces and lengthwise rod. Retainer crosswise part is furnished with detachable threaded nut while stepped channel in the body will receive the retainer crosswise part. Note also that compression spring is fitted in the cavity formed by walls of stepped channel and threaded nut.

Vertical stem lining

Internal water impermeable layer is assembled of iron tubing. External load-bearing layer is made from solid mix with activated dressing tails as a binder and classified mining wastes as a coarse and fine filler. External load-bearing layer is bonded with rock massif by the system of anchors.

Skid yoke

Skid yoke comprises body with handle and mouth for drill string. It differs from known designs in that said body has intersecting vertical and horizontal channels, the latter being stepped. Note here that yoke has a fork-shape retainer with teeth arranged in the body vertical channels, at outer surface with circular groove. Note also that spring-loaded retainers are arranged in retainer tooth circular grooves at working position. Retainers are composed by balls.

Method of methane extraction from coal seam

Invention relates to mining and can be used for methane production from coal seams. Proposed method comprises drilling or opening of used vertical well at methane-coal bed and determination of seam depth in well cross-section. Coal grade composition is defined and short high-pressure directed pulses source is fitted via working interval of vertical well in said methane-coal bed. Said bed is subjected to the effects of energy of plasma generated by the blast of calibrated metallic conductor as intermittent directed short high-pressure pulses. The number of high-pressure pulses and duration of said effects in interval of methane-coal bed is defined by bed depth in well cross-section and coal grade composition.

Protection of development entries

Proposed method comprises mechanised pre-working and stabilisation in coal massif, protection of opened space against adjacent column by coal post. Compensation cavities are made in virgin massif, nearby bed soil, and separated by coal post. Cavities and coal posts there between on massif side and opened space are arranged in staggered manner. Width, height and depth of cavities are defined on the basis of coal seam mining and geological conditions and heading machine performances. Coal post width between compensation cavities is calculated with due allowance for empirical factor equal to 1.3 at working in virgin massif and equal to 1.6 at working in adjacent column abutment pressure zone, seal depth (post height) and seam cubical compression strength.

Acoustic downhole emitter

Acoustic downhole emitter contains an electronic unit, the upper head ensuring connection to a cable terminal connector, the lower head, a channel for electric wires and metal tight bodies interconnected into the whole structure with piezoelectric transducers placed in them. Inner and outer surface of each body has groove-shaped caves. At that in the bodies there are bushings with screw nuts fixed to them so that the two neighbouring bodies can be fixed towards each other by means of metal wires fixed to two screw nuts of the neighbouring bodies simultaneously. Besides the bodies are also fixed to each other by parts formed by moulding of a rubber-plastic compound at joints of a gap between the two neighbouring bodies.

Bubble-point pressure determination method

Bubble-point pressure determination method includes measurement of bottomhole pressure at different oil production rates and registration of bottomhole pressure change curves upon returning the well to production in linear and nonlinear oil influx modes above or below bubble point pressure. At that wellhead pressure change curves and dynamic level changes in annular space are recorded additionally. By measurement results average density is calculated at each moment of time for the mixture column at annular space and the curve of average density changes in time at annular space is plotted. The free gas release is fixed when a gas separator releases it to the annular space. The value of bubble point pressure is determined by comparison of the mixture density change curve with pressure changes at pump suction at a certain period of time.

Vibrator

Vibrator comprises body connected with upper and lower adapters, rod arranged in upper adapter casing and provided with flange-like hammer and cams to interact with upper adapter anvil and lower adapter cams, and ball cage arranged between anvil working elements and hammer working elements. Said anvil working elements and hammer working elements are composed by bearing cages articulated with upper adapter and rod flange.

Method and device for mounting protective nets on tunnel walls or ceilings

Present invention is related to a method of installing protective nets on tunnel walls or ceilings. The method of installing the protective nets on the tunnel walls or ceilings at which the protective net in the form of a tape is unwounded from a roll. The roll rotation is controlled by means of the press roller, contacting with the roll surface for unwinding the protective net. In this case the press roller is rotated by means of a control device and moved to the roll in the radial direction. The roll is mechanically moved along the tunnel walls or ceiling. A device for implementing the method is equipped with a holder intended for a shaft attachment on which the roll with the protective net is situated, with the possibility to control the rotation around the shaft by means of the facilities. The protective net which is unwound at each stage is preferably tensioned and fastened mechanically.

Method of open working of minerals with groundwater influx

Proposed method comprises erection of sludge pond, opening and mining of quarry field. At quarry nonworking board bench located on the side of maximum ground water mark in quarry field contour erected is buttress anti-filtration shield, under the level of ground waters beyond the boundaries the prism of possible collapse of underlying bench, over the entire length of ground water layer. Note here that buttress shield height is defined from mathematical relationship.

Method for development of separate small oil lenses

While developing separate small oil lenses penetrated by a single well extraction of the formation fluid is alternated with injection of a displacement agent. Injection of a displacement agent is made at pressure that does not exceed breakdown pressure determined against geological and physical parameters of the lens until intake reduces per 50% in comparison with the initial value. Fluid extraction is made till the oil production rate decreases per 20-60% in comparison with the initial value. At that injection periods at the initial stage are made through equal time intervals until formation pressure reaches the initial value. Extraction periods at the initial stage are also made in equal time intervals until formation pressure reduces up to 80-90% of bubble point pressure. At that the initial development stage is considered completed when the initial oil production rate decreases in the second and next extraction cycles up to 30-60% of the initial oil production rate in the first cycle.

Bottomhole zone treatment method for horizontal well

Bottomhole zone treatment method for a horizontal well includes running-in into the treated bottomhole zone of a hydroperforator with a one-way acting pipe string with nozzles faced upwards, impact of hydrocarbon solvent jet through it, then impact by acid solution, process withhold for reaction with acid, running-out of the equipment from the well, swabbing and bringing the well into production. Before running-in, at the head of a horizontal well, the lower end of the pipe string is equipped bottom upwards with a centralising tube, the one-way acting hydroperforator with nozzles faced upwards, a pulsed liquid pulsator, a valve consisting of a saddle and body with openings covered tightly by the saddle fixed by a shear pin in regards to the body, the pipe string is run in into the bottomhole of a horizontal well until it backs the centralising tube. Then in pulse mode, in two stages, the bottomhole zone is impacted through the hydroperforator at first by a hydrocarbon solution jet, then by a jet of hydrochloric acid. While implementing two stages with simultaneous injection of hydrocarbon solvent or hydrochloric acid the pipe string is moved from the bottomhole to the head at constant speed along the length of the horizontal well screen. When injection of hydrochloric acid is completed the hydroperforator is placed at the well screen end from the well head side, then a plug is set at the head to the pipe string and flushed by process liquid through the pipes till it sets at the valve saddle and the shear pin is destroyed under pressure in the pipe string. Then the process is withhold during 1 hour, at that in process of this withhold the pipe string is run in until the hydroperforator rests in the bottomhole of a horizontal well. Then, during three cycles, 0.5 m3 of process liquid is injected to the pipe string and tubing-casing annulus in turn. When withhold time is over reaction products are washed out by return circulation in one and a halve volume of the well.

Muck cleanup at steeply-dipping deposits

Proposed method comprises laying of perforated pipes to be advanced as ore is broken, filling said pipes with substance generating the power for broken ore cleanup and broken ore cleanup. Explosive is used as power generating substance. Explosive is fitted in said pipe and initiated while ore cleanup is performed by blast shock wave. Pipe perforations are located so that hole axes are parallel with laying side plane which allows pipe breaking in line of said holes and directing major part of blast air wave to lying side.

Well operation device

Proposed device comprises casing, extra production string and flow string. Extra production string is used which does not extend to well head. Flow string is equipped with fixed external coupling secured above extra production string and nearby the top of extra production string. Said coupling represents that with OD larger than ID of extra operation string and not larger than OD of standard string gage for casing and with OD-to-coupling height varying from 0.70 to 0.83.

Visualised logging and device to this end (versions)

Proposed method comprises tripping the video camera in hole with turbid medium on logging cable over tubing. Logging zone is isolated by packer and web in tubing suspension wherein suspended rock is settled by gravity. Visualised logging is executed in column of laminated optically clear fluid by displacement of video camera inside tubing suspension. Logging results are used to estimate operating conditions of the hole. If required, extra web is used to confine the logging zone. In compliance with first version, logging device comprises tubing suspension with packer separating the logging zone from hole behind-the-packer chamber, logging cable, video camera suspended from logging cable inside the suspension. Web is hooked to video camera to fit in suspension seat and to be detached at camera tripping in hole along suspension to logging zone. Web and seat in suspension are furnished with locking elements. Web has a central hole with gland for logging cable to slide there over and can have filter cells. Said web features OD smaller than tubing ID. Video camera is equipped with centring skid. Logging cable is coated with polyamide shell over logging length. In compliance with second version, logging device comprises tubing suspension with packer separating the logging zone from hole behind-the-packer chamber, logging cable, video camera suspended from logging cable inside the suspension. Web is secured to video camera to slide by its edges over suspension wall. Video camera is equipped with centring skid. Gland seals are arranged over web edges. Said web can be made of filter material. Said web features OD smaller than tubing ID.

Oil and gas well repair unit and method for running coil tubing in and out by means of this unit

Group of inventions is related to oil industry and intended for workover, geophysical and thermal and hydrodynamic surveys of oil, gas and other wells using coil tubing and for well intervention. The unit (Fig. 1) includes a transportation basis 1 with two outriggers 12, the operator's cabin with control system 9, a drum 2 with drive 4, coil tubing 3, a winder 10 for winding of coil tubing to the drum, an injector with jigging blocks 5 with a guider 11 installed before it, the injector drive 6, sealing and BOP equipment 7 connected to the well Christmas tree 8 and a logging module 14, at that the drum drive is a power drive unit, the guider is made as a roll, coil tubing (Fig. 2) is a polymer-coated steel tubing; at the unit there is an installed pump 13 and a speed sensor measuring speed of the tubing feed to the well, two delivery force sensors and a metre measuring length of the tubing in the well, at that the above sensors, a temperature sensor and a well-pressure gage, the third delivery force sensor, a gamma-activity indicator, an accelerometer, a collar locator and the metre measuring length of the tubing in the well are connected to the control system, at that the logging module includes a temperature sensor and a well-pressure gage, a collar locator, a gamma-activity indicator, an accelerometer and the third delivery force sensor.

Roller bit

Roller bit comprises legs with inclined pins shifted parallel about bit axis and cutters inclined to their generating lines and having honed or cast teeth and flushing assembly. Said flushing assembly is located in bit axis while all teeth rows feature skewed teeth. Said skewed teeth are inclined to pin axis so that total axial component of simultaneous mechanical force applied by all skewed teeth to face fluid for every bit is equal and directed from centre to periphery. Alternatively, inclination of skewed teeth working surfaces to drill bit generatrix makes 5-45 degrees. Smaller inclination corresponds to larger inclination of pin axis to drill bit axes.

Method for determining and evaluating effectiveness of asphalt paraffin deposit solvents

Method for determining and evaluating effectiveness of asphalt paraffin deposit solvents involves selection of samples of asphalt paraffin deposits from oil equipment, application of the deposits on a metal plate, weight determination, attack by a solvent. Besides, the method includes weight determination as a result of attack by the solvent, fixation of results, hanging of the metal plate with the applied sample on the balance hook, continuous measurement of the sample weight, determination of weight of the metal plate with the sample, lowering it into a vessel with the test solvent, the vessel thermostatic control, fixing of the results; similar preparation of other samples and lowering them into the vessel with other solvent, conduction of similar measurements, comparison of the test data of different solvents and taking into account the "wall effect". In this case, the sample with native (without fusing) structure is used; the metal plate with the applied sample is hung on the hook of the torsion balance arm, and comparison of the test data of different solvents is performed by kinetic curves of their dissolution, obtained via the anamorphosis. At that, the order of dissolution reactions and limiting stages, rate constants of dissolution, time during which the half of the amount of the asphalt paraffin deposits pass into a solution, provided that the process flows as the first-order reaction, as well as the effective activation energy of the deposit destruction are calculated, and effectiveness of asphalt paraffin deposit solvents is estimated by the received values of kinetic parameters at one or another temperature.

Method and device for lubrication of rock-drill steel shank

Invention relates to lubrication of rock-drill steel shank. At least portion of fluid is forced to drill bit shank drive hydraulic circuit, or drilling machine drive, or device for pushing of drill bit shank from still tool of drilling machine. Note here that pressurised lubing fluid is circulated back into drill bit shank drive hydraulic circuit, or drilling machine drive, or device for pushing of drill bit shank from still tool of drilling machine.

Reinforced elastomers

Group of inventions is related to elastomers, and namely to reinforced elastomers. The well sealing technique for the well borehole includes receipt of a basic polymer and reinforcing active filler, which contains a matrix of discreet parts of the first material paced in the basic polymer. At the first stage the well sealing is unfolded in the well borehole. Impact is made on fluid sealing in the well borehole, at that transfer of the sealing to the second stage is made under action of the fluid in the borehole. At that discreet part of the first material differ between themselves and/or with the basic polymer by weaker values before impact of the borehole fluid than after impact. At that the first stage is differentiated by the first elastic modulus and the second stage is differentiated by the second elastic modulus, and the second modulus is bigger than the first one.

Multi-seat pdc-drill bit and method of pdc-cutter arrangement at drill bit blades

Set of inventions relates to PDC-drill bits for well boring and to method of PDC-cutter arrangement at drill-bit blades. PDC-drill bit comprises several blades including primary blades and secondary blades. Primary blades are reinforced by PDC-cutters in compliance with single-seat method. Secondary blades are reinforced by PDC-cutters in compliance with multi-seat method so that every cutter at secondary blade sits in radial position identical to single-seat cutter located at primary blade, immediately ahead of said secondary blade. At least one said secondary blade is arranged immediately behind every primary blade to make a balanceable PDC-drill bit.

Downhole device for generation and transfer of flexure oscillations to productive stratum

Device includes a sucker-rod pump unit and liner of pipes below the productive interval. The liner part covering the productive interval is assembled of resilient elements with flexural stiffness less than flexural stiffness of the pipes placed above it.

Production simulation method in oil wells and device for its implementation

Invention is related to the field of oil and gas industry, mainly to production of viscous and superviscous oil, and it may be used for production stimulation of oil with viscous components and deposits. High-frequency impulse current is generated by a group HF surge-current generators in a group of twin-transmission power lines in a group of wells and consisting of two isolated conductors or one isolated conductor and used as the second metal conductor of pipelines in the group of wells. The impact is made by an electromagnetic high-frequency pulsed field generated by high-frequency impulse current of conductors in the groups of twin-transmission power lines to the metal surface of pipelines in the group of wells. Thermal and acoustic impact is made on intratubal liquid in the well group and through it on the oil deposit by heating and mechanical vibration of the pipeline metal which occurs at passage of high-frequency impulse current through the twin-transmission power line. Additional thermal and acoustic impact is made on intratubal liquid in the well group and through it on the oil deposit by heating and pressure fluctuations which occur at the end of the twin-transmission power line in result of high-frequency impulse charge through intratubal liquid. At that the HF surge-current generators are set so that they generate high-frequency current pulses with identical pulse length and repetition.

Coal seam degassing

Proposed method comprises drilling of degassing walls directed to mining face, performing of coal seam interval frac therefrom and tapping of released gas Degassing wells are drilled in ascending direction from mounting chamber and face entries cut across extraction pillar till exit to adjacent face entry board. Interval frac is performed with the use of Novec 1230 fluid. Then, degassing well mouth is sealed while released recess is discharged by its free outflow from said wells to degassing circuit.

Roller bit with asymmetric flushing

Proposed roller bit comprises legs with inclined pins with roller cones with cast or honed teeth, sludge withdrawal channel and flushing assemblies arranged between roller cones. All roller cones feature skewed teeth. Note here that first roller cone is arranged between flushing assemblies and has teeth inclined to pin axis so that total axial component of force of all skewed teeth acting on hydraulic fluid of the roller cone bottom is directed from periphery to centre and that of adjacent roller cones is directed in opposite direction.

Crown bit grooved joint

Invention is intended for engagement and transmission of torque and moment of revolution from cylindrical ring part with radial grooves to plate-like parts, including for attachment of plate cutters to crown bit. This invention consists in formation of fixed straight dovetail joint by clasp of cutter shank by outer and inner rings fitted in circular recesses over bit body OD and ID and fitting their part in bit body radial grooves so that cutter shank is pressed to radial groove leading wall. Thus, cutter shank proves fixed radially and axially by said outer and inner rings and clamped between deformed outer and inner rings on one side and, on opposite side, and leading wall of bit body radial groove. As a result cutter shank proves rigidly fixed in circular bit to make a press-fit connection.

Method of deposition open working

Proposed method comprises excavation of working trench, mounting of transport communications, working of quarry field, excavation of minerals and access rock by benches. Note here that quarry field development is varied out from centre to its flanks while after development of quarry field for angle α between working trench and transport communications to be defined from mathematical relationship. Access rock is dumped into internal dumps located between working trench and transport communications. After complete development of quarry field working trench is elongated and transport communications are installed, cycle being reiterated several times.