Bottom-hole pulses generating device

FIELD: drilling of soil or rock.

SUBSTANCE: group of inventions relates to drilling, namely to vibrations and hydraulic pulses generation in drilling well. Pulse generator comprises stator, connected to housing; rotor installed with possibility of rotation in housing; annular space formed between rotor and stator; inner channel, which is made passing through rotor; one or more external through holes ensuring fluid medium connection between annular space and internal channel; and retrievable valve unit, rotationally connected to rotor and at least partially installed in internal channel. Retrievable valve unit includes valve element made with possibility of rotation, having one or more main through flow holes, and linear adjustment device for moving of valve element made with possibility of rotation from first position into second position. Fluid medium path is periodically created by one or more external through flow holes, annular space and one or more main through flow holes during rotor rotation.

EFFECT: enabling drilling rig longer operating life.

18 cl, 11 dwg

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil producing industry and intended for improvement of oil recovery of productive formations. The method of excitement of wave field on the injection well face consists in that the flat constrained flow of liquid is supplied continuously from the slot-hole nozzle to the wedge nose. Meanwhile the area of primary generation of vortex structures in the zone behind the nozzle cut edge is formed. Periodic breakdown of ring vortex structures from the nozzle cut edge, their movement with flow and impact with the wedge nose are provided. Pressure disturbances are generated at deformation and destruction of vortex structures on the wedge nose. Propagation of periodic pressure disturbances from the wedge nose extensively in the form of elastic waves and their chaotic reflection from surrounding walls is performed. The excitation by energy of multiple vortex structures due to energy of elastic oscillations achieving primary generation area is conducted. The liquid flow on the wedge nose is deflected to one of two diverging outlet channels. The flow is divided at the inlet upstream the output channel and sent partially to the lateral chamber interfaced with the nozzle edge and the output channel. In the chamber the pressure is increased due to piston effect of the supplied flow and the flow is pushed away to the opposite output channel, formed from two of its sides by the pressure difference. Periodic switching of the liquid flow direction between output channels is provided. The liquid is displaced alternately from the diverging channels into the common punched output collector. The field of elastic oscillations is excite on the injection well face. Thus the elastic waves reflected from walls of each chamber are focused on the nozzle cut edge interfaced to it.

EFFECT: improvement of efficiency of conversion of kinetic energy of the flow to oscillatory energy of the wave field.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: according to the method acoustic, electric, mechanical and hydrodynamic compressing and pulling stresses are formed by acting by periodic short impulses by means of explosion of a calibrated conductor placed in a working interval of a well. This energy of explosion is brought to the coal seam. In the well the slot-hole perforation is created which is oriented in the directions of main stresses in the coal seam. An additional slot-hole perforation is formed in permeable rocks containing the coal seam. The direction of additional slot-hole perforation is oriented in the directions of the main stresses of the rocks containing the coal seam. It strengthens acoustic and hydrodynamic cavitation of gas bubbles emitted from coal, fractures, microfractures, pores, micropores, capillaries, microcapillaries of the coal seam. Fractures and microfractures are also formed in the permeable rocks containing the coal seam. It favors to development of mesh of abnormal microfracturing in the coal seam and additional fractures and microfractures in the permeable rocks containing the coal seam. In general all factors provide the maximum desorption and diffusion of methane.

EFFECT: increase of production of coal methane, reduction of energy consumption, improvement of safety and environmental friendliness of the process.

5 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: this device comprises hollow case with cover that has working fluid feed channels and bottom with discharge channel that features cross-section larger than that of working fluid feed channel for communication case inside with well bottom zone, moving working member that makes with said case the working chambers. Said working member is shaped to truncated ellipse fitted on the case at antifriction bearing and composed of axle with relationship between arms of top and bottom ends equal to 1:2. Aforesaid working member has the channel to communicate working chamber, antifriction bearing with the case bottom discharge channel. Nozzle is arranged under said bottom with communicating discharge channel and radial equal-cross-section area. Total cross-section area of said holes equals that of discharge channel. Cover bottom surface and bottom upper surface are composed of cylinder generatrix to allow displacement of working member top and bottom arms there over and isolation of working chambers.

EFFECT: higher efficiency of stationary pulse injection of fluid.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: regulated hydrodynamic wave generator in the producer includes a sucker-rod pump unit and a two-piece piston with centrators placed in the production casing under dynamic level of the oil well fluid at the shank end or at the lower part of the production tubing made as the tubing string. The two-piece piston is made as a bank of elements chocking jets of the oil well fluid in the production casing. The bank is formed of choking elements so that they may be flown around their bodies and their flow passages are narrowed for the oil well fluid. The choking elements are made with sharpened outer edges and flow-around surfaces at least from the side faced towards dynamic level of the oil well fluid with potential narrowing in width of flow passages and speeding-up of the oil well fluid jets in the area of jets breaking from the outer edges of the choking elements.

EFFECT: improved oil recovery due to intensification of filtering processes in the productive stratum and involvement into operation of non-operated or low-operated interlayers in the development element.

5 cl, 4 dwg, 2 tbl, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to the oil producing industry and intended for the improvement of oil recovery of productive formations. The method for generating a wave field at an injector bottomhole with the automatic tuning of a generation constant frequency lies in the generation of pressure fluctuations in a fluid flow pumped to a productive formation through tubing strings by its pumping through the flow-excited Helmholtz resonator (FEHR). At that the flow rate at a cross-section of an input nozzle and the distance between the input nozzle and a bushing with a discharge outlet is maintained. Moreover the flow rate at the cross-section of the input nozzle and the distance between the input nozzle and bushing with the discharge outlet is maintained due to the movement of the bushing with the discharge outlet, thus ensuring an increase of this distance at an increased flow rate and the above decreased distance at a reduced flow rate. The device used to this end consists of FEHR installed inside the tubing string; it represents a hollow cylindrical chamber with flat bottoms, wherein the input nozzle is placed in the front bottom and the bushing with the discharge outlet is placed in the rare bottom. At that the bushing with the discharge outlet is made movable and inside the tubing string behind FEHR there is a fixed hydraulic cylinder with a spring-supported piston connected by a rod to the fixed bushing with the discharge outlet. At that the cavity inside the hydraulic cylinder in front of the piston is communicated downstream to the annular space while the cavity behind the piston is connected to the inner volume of the tubing string.

EFFECT: improved efficiency of the stable frequency generation of pressure fluctuations at the bottomhole.

4 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to the oil producing industry and intended for the improvement of oil recovery of productive formations. The method for generating a wave field at an injector bottomhole with the automatic tuning of a generation resonant mode lies in the generation of pressure fluctuations in a fluid flow pumped to a productive formation through tubing strings by its pumping through the flow-excited Helmholtz resonator (FEHR). At that the respective flow rate and the FEHR volume is maintained at the cross-section of a feed nozzle. Moreover the respective flow rate at the cross-section of the feed nozzle and the FEHR volume is maintained due to the movement of its downstream rare bottom, thus increasing the FEHR volume at a reduced flow rate and reduced FEHR volume at an increased flow rate. The device used to this end consists of FEHR installed inside the tubing string; it represents a hollow cylindrical chamber with flat bottoms. In the front chamber of the bottom the feed nozzle is mounted and a discharge outlet with sharp edges is made at the rare bottom. At that the rare bottom is made movable and inside the tubing string behind FEHR there is a fixed hydraulic cylinder with a spring-supported piston connected by a rod to the movable rare bottom. At that the cavity inside the hydraulic cylinder in front of the piston is connected downstream to the inner volume of the tubing string while the cavity behind the piston is communicated to the annular space.

EFFECT: improved efficiency to maintain the stable high intensity of the wave field at the bottomhole.

4 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: rotary hydraulic vibrator includes a hollow body with spool installed coaxially to it. The body comprises an axial cylindrical channel with process openings in it matched by channels to the spool openings. The body is blinded from below. The spool is installed at the support coaxially to the body. In the axial cylindrical channel process openings are made by four openings in two rows, at that they are radial and mutually perpendicular in pairs. Spool openings matched to them and placed in the upper row are made radial, while the openings placed in the lower row and matched by a grove are offset tangentially. Jet nozzles are installed in the spool openings. Spool openings are made so that replaceable jet nozzles of different diameter and configuration may be set in them.

EFFECT: improved quality of cleanup for the reservoir perforated interval and increased permeability of rock within the well perforated interval due to provided effective parameters of impact and pulsed action at simplified design of the used equipment and reduced power requirement for the ground pumping equipment.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to oil producing industry and intended for improvement of oil recovery of the productive formations. The invention represents the method for wave field generation at the injector bottomhole with permanent rate of generation and adjustment of Helmholtz flow resonator for maintenance of fixed rate of pressure fluctuations in the liquid flow injected to the formation at changed formation pressure. The method lies in automatic adjustment of the flow section area for output opening in compliance with changes of formation pressure. It is required to maintain the permanent rate of the flow at the nozzle cut defining generation frequency to ensure a stable high amplification factor. The novelty lies in the unit in the output opening of Helmholtz flow resonator of the movable conical slide valve with hydraulic drive ensuring automatic movement of the valve at change in pressure drop at the device.

EFFECT: improved efficiency of permanent tone frequency maintenance at the opening.

3 cl, 1 dwg

Downhole pulsator // 2539087

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular, to devices used for formation simulation. Device for hydropercussion simulation of the formation included into the assembly of flow string comprises a hydraulic cylinder with crossover shoe, a plunger with radial openings, a spring-actuated pusher with circular bore and a ring piston. At that the hydraulic cylinder is fixed rigidly to a chamber with a landing ring installed in it and longitudinal grooves at its outer side. The pusher is equipped with outside protrusion, a saddle and a ball valve in the axial channel. The pusher lower end is passed to the axial channel of the landing ring and equipped with a locking ring interconnected with the pusher by a shear pin. The chamber axial channel is covered from below by a thrust ring and equipped with a hollow rod with the end valve pressed by a spring to the landing ring. At that in the end valve body there is a bore with a loose locking ring installed in it and the plunger is equipped with a ring piston thus forming an annular gap with the hydraulic cylinder coupled hydraulically to annular space by bypass ports.

EFFECT: improved efficiency of hydropercussion simulation of the formation.

4 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil and gas production, particularly, to the recovery of the well permeability and can be used for the well repair. The proposed method comprises using the laser radiation to act on the well fluid at a power to develop plasma breakdowns in the fluid. Note here that, first, the laser pulse or intermittent radiation is used to generate the said breakdown and, thereafter, the frequency of an acoustic signal originating at the said breakdown is measured. Then, further effects in the pulse mode are used at the said frequency of the laser radiation.

EFFECT: profound effects on the well walls, higher permeability of the well (oil yield).

3 cl, 1 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: vibrator has body with inlet and outlet channels and rotor with blades, supported by bearing. A valve is mounted in body, made with slits and bottom with apertures in middle portion. Valve is mounted in body on thread with possible axial displacement. Rotor with blades and apertures in bottom is mounted on bearing in axial channel of valve. Slits of valve are made lower than rotor mounting position, to feed liquid into well, bypassing the valve, and above rotor position, with possible feeding of liquid into valve onto rotor blades after its axial displacement. Axial channel of valve is covered by lid with rod, with possible insertion thereof into rotor axial channel. Valve drive in the body is limited by transfer pipe at lower portion.

EFFECT: higher quality.

3 dwg

FIELD: oil industry, particularly vibration generating arrangements for boreholes or wells, for instance for stimulating production.

SUBSTANCE: facility has bottomhole striking tool, hoisting device arranged inside borehole and connected to striking tool and anvil. Hoisting device comprises body. Located in the body are piston with through orifice, valve and upper stop adapted to limit upward piston movement. Valve is connected with striking tool by rod and is formed as lower stop used to limit downward piston movement. Striking tool with rod and valve are used to transmit impacts of falling piston to anvil. Facility includes jet device arranged on tubing string. Inlet chamber of jet device communicates with over-piston space of hoisting device. Jet device diffuser is communicated with borehole bottom and with under-piston space of hoisting device.

EFFECT: extended range of application.

1 dwg

FIELD: oil production, particularly vibration generating arrangements for boreholes or wells for stimulating production.

SUBSTANCE: device comprises bottomhole tool for applying impacts arranged in well borehole, lifting device connected to bottomhole tool and anvil. Lifting device has case for piston with through channel, valve and upper stop adapted to limit upward piston movement arrangement. Space between outer case surface and inner well surface is closed with packer. Over-piston space of lifting means is hydraulically connected with suction line of downhole equipment. Bottomhole tool is installed in container with support placed on the anvil and connected to the case. Container is provided with orifices for liquid. Container bottom serves as the anvil.

EFFECT: increased efficiency due to improved working ability thereof and reduced turnaround time.

5 cl, 4 dwg

FIELD: oil production, particularly vibration generating arrangements for boreholes or wells for stimulating production.

SUBSTANCE: method involves applying impacts to oil reservoir by falling bottomhole tool simultaneously with oil recovery from stimulating well. Bottomhole tool lifting is performed when recovered product flow pressure in area between lifting device and anvil is less than bubble-point pressure. Gas-and liquid mixture is extracted after lifting device by immersed pump with gas separator or by immersed pump-ejector system including immersed pump, gas separator and jet device with check valve installed at inlet thereof or by water-jet pump with check valve at inlet thereof or by gas-lift assembly.

EFFECT: increased efficiency due to increased speed of bottomhole tool falling, increased frequency and power of impacts applied to oil reservoir.

15 cl, 6 dwg

FIELD: oil production, particularly for oil well yield recovery under difficult development conditions, for instance to increase well output and to recover marginal wells.

SUBSTANCE: method involves exciting sound emitting device by electric signal having process frequency band; transforming electric signal energy into energy of acoustic vibrations acting on neighboring production well zone over perforated intervals with predetermined time steps; performing action on remote production well zone with low-frequency oscillations of combinative frequency of non-linear cooperation of process band oscillations. Acoustic oscillation action of neighboring production well zone is performed by succession of frequency-modulated signals beginning from the highest frequency and with frequency reduction. Low-frequency oscillation action on remote production well zone is performed beginning with combinative difference frequencies with frequency reduction and action is terminated beginning with minimal combinative difference frequencies with frequency increase. After that neighboring production zone is treated by a succession of frequency-modulated signals beginning from the lowest frequency with frequency increase.

EFFECT: increased efficiency of oil well bottom zone treatment.

1 ex, 1 dwg

FIELD: oil industry.

SUBSTANCE: on watered oil deposit, opened by at least one well, position of deposit portions with immobile oil phase is determined. At level of productive bed seismic probe is placed, amplitudes and phases of vertical and two horizontal components of seismic oscillations are measured at different frequencies of seismic effect. Amplitude and phase of total horizontal component for each frequency of seismic effect are determined. Bed is affected with at least one oscillations source at working frequency. As working frequency, frequency is used, at which vertical and horizontal components are of equal amplitude, but of different phase for 90°.

EFFECT: higher oil yield.

5 cl, 5 dwg

FIELD: geophysics.

SUBSTANCE: device is connected to load-bearing geophysical cable with surface block and has upper head with contact device for cable headpiece, hermetical body with electronics block and piezoconverters of piezoceramic washers positioned thereon. No less than two washers in each piezoconverter are made with segments, electrically insulated from the rest of washer surface, performing functions of sensors of piezoconverters state control. Electronics block is provided with set-point generator, power amplifier, microprocessor, piezoconverters status control module, modem, current displacer, overpower protection module, energy-independent memory block, frequency meter, current converter. Microprocessor is connected by its first control input through set-point generator to power amplifier. Generator can dispense signals with alternating frequency in range, determined during oration of deice in well ion basis of minimal and maximal resonance frequencies of separate piezoconverters included in device composition, while dispensed frequency from generator can not be less than minimal and more than maximal from ranger of resonance frequencies of piezoconverters. To second controlling input of microprocessor overload protection module is connected, to measuring inputs of processor through frequency meter output of set-point generator, signaling output of power amplifier, measuring output of current transformer, piezoconverters status control module output are connected. Microprocessor via two-side connection is connected to energy-independent module and through modem - to current mixer. To piezoconverters control module independently from each other in-built sensors are connected for controlling status of piezoconverters.

EFFECT: higher efficiency, higher durability.

4 dwg, 3 cl

FIELD: oil production industry, particularly for well bottom cleaning.

SUBSTANCE: method involves supplying active liquid medium through pressure booster; applying impulse action to liquid medium; supplying active liquid medium into jet means nozzle and extracting passive liquid medium from formation zone. The active liquid medium is mixture including aliphatic and aromatic hydrocarbon solvents to which treated demulsifier is added. The active liquid medium is formed in formation under 10-20 MPa pressure and held in the formation for 12-24 hours. Passive liquid medium is removed from well productive zone by performing two-stage impulse-wave depression action. Then hydroimpulsive treatment of bottom zone intervals is performed with the use of pressure booster with flat jet head, which generates flat fan-like jets of technological liquid, wherein impulse frequency is 50-300 impulse per minute, pressure is 1.5-2.5 static pressures in well at formation level. Then passive liquid medium is finally removed from formation zone. The technological liquid is all-purpose surfactant solutions. Device comprises flow string, jet means installed in flow string and provided with active nozzle, mixing chamber, diffuser, active and passive liquid media inlet and outlet channels, as well as packer and pressure booster arranged under jet means. The pressure booster is located under well zone perforation area so that pressure booster may be lifted in several stages. The jet means may operate in two modes. Pressure booster has flat jet head located in lower part thereof. Device additionally has depression impulse generator and impulse-wave depressor arranged in predetermined locations.

EFFECT: increased oil and gas well recovery, improved injection well intake capacity, increased initial well bottom zone permeability.

3 cl, 6 dwg

FIELD: oil production, particularly oil field development.

SUBSTANCE: method involves providing injection wells with piston pumping units, flow strings and hydraulic vibrators installed at well bottom; installing composite acoustic transducer, which transforms noise of quarter-wave resonators having several resonance frequencies in injection line of piston pump unit; converting low-frequency noise of piston pump unit into ultrasound; flattening low-frequency pulsations in injection line over hydraulic vibrator and creating uniform liquid flow to hydraulic vibrator; uniformly forcing liquid into bed by applying pressure pulses to the liquid along with well bottom treatment zone increase.

EFFECT: optimized bottomhole vibrator operation due to reduced flow pulsation during treatment operations or liquid forcing into low-permeable beds.

3 dwg

FIELD: well equipment, particularly for pipe or pipe string cleaning of scales by repeatedly striking pipe walls with working body with high frequency and regulated amplitude, to eliminate pipe sticking in well by exciting transversal oscillations by striker.

SUBSTANCE: device comprises pipe string and striker adapted to hit pipe walls. The device is connected to additional pipe string provided with support on lower end and is submerged in pipe string to be cleaned. Pendulum-like striker is suspended in additional pipe string so that the striker is spaced predetermined distance from additional pipe string bottom to provide free radial striker movement. Ball-like flow shutoff means is arranged over pendulum-like striker and has diameter less than inner diameter of additional pipe string. Ratio between ball-like flow shutoff means diameter and inner additional pipe string diameter is defined as d/Din≤0.85, where Din is inner additional pipe string diameter, d is ball-like flow shutoff means diameter.

EFFECT: increased efficiency of pipe interior cleaning of scale.

1 dwg

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