Method and equipment for interval research of formation parameters at tubes

FIELD: mining.

SUBSTANCE: method includes the downhole equipment lowering into the well to the specified depth, consisting of an oilwell tubing column (OWT), upper and lower inflatable packers with the radial holes in the inflation chambers, the outer and inner flexible sleeves with disposed between them the metal plate frame, switching of the upper and lower inflatable packers from transport to working position. The assembly and lowering of the downhole equipment is carried out in the following sequence: the plug, the circulation full bore tube valve with the shear pins, the lower centralizer, inflate and bypass valve of the inflatable packers layout (IBVIPL) underpackers, the lower inflatable packer and inflate valve, interpacker disconnect switch, interpacker IBVIPL, upper inflatable packer and inflate valve, the upper centralizer, overpacker disconnect switch, circulation valve. At the beginning of the downhole equipment lowering, the inflate valves of the inflatable packers, underpacker IBVIPL and interpacker IBVIPL are in the closed position. When the casing pressure is exceeded over the OWT column pressure, the opening of the bypass holes of underpacker and interpacker IBVIPL and filling of OWT column with borehole fluid is carried out. The bypass holes of underpacker and interpacker IBVIPL are closed automatically, then provide the first fluid supply. At that the inflate and bypass holes of underpacker and interpacker IBVIPL are closed and build the pressure, at which the upper and lower inflate valves of the upper and lower inflatable packers are opened respectively, bringing the inflatable chambers into the working position. The downhole equipment is stand under the pressure, then slowly carry out the first pressure releasing: if it reaches the value, the inflate valves are closed completely. The inflatable packers are moved to the working position and intervally overlap the wellbore. At the first pressure release in the underpacker IBVIPL there is the opportunity to open the bypass holes, then the fluid selection is carried out from the underpacker area. The inflate and bypass holes of interpacker IBVIPL are closed. The second fluid supply is performed and the constant pressure is built, at which the inflate holes are opened in underpacker IBVIPL . If necessary, the process fluid inflate to the underpacker area is carried out, during which the inflate and bypass holes of interpacker IBVIPL are closed. Produce the second pressure release, at which there is the opportunity to open the bypass hole in the interpacker IBVIPL. The fluid selection from interparcker area is performed during which the inflate and bypass holes of underpacker IBVIPL are closed. The third fluid supply is performed and the pressure is built, at which the inflate holes of interpacker IBVIPL are opened, and the inflate and bypass holes in underpacker IBVIPL are closed. Produce the third pressure release, at which the inflate and bypass holes of both IBVIPL come to the starting position.

EFFECT: acceleration of works on the sample fluid selection or process fluid inflate into the underpacker and interpacker well areas at one tripping process.

2 cl, 6 dwg

 



 

Same patents:

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to sampling of formation fluids. A method of fluid sampling in a position inside the borehole passing in underground layer where the sampling tool fitted with a packer is placed, in the borehole on the transportation unit the packer expansion is provided with formation of the sampling zone between the top restrictive interval and the bottom restrictive interval, fluid is taken from the top and the bottom restrictive intervals, and fluid is taken from the sampling zone. And at least two among the top restrictive interval, the bottom restrictive interval and the sampling zone have liquid isolation from each other by means of one or more packer sections.

EFFECT: decrease of pollution of fluids during injection into the downhole tool and/or during passing through the downhole tool.

10 cl, 6 dwg

Gas sampling system // 2552267

FIELD: oil and gas industry.

SUBSTANCE: system contains casing-well, cylindrical sampler comprising three main parts, top part is manifold chamber, middle part is connecting coupling with female thread and groove connecting bottom and top parts, bottom part is receiving chamber for accumulation of gas supplied via side holes of the casing-well, receiving chamber and manifold chamber are covered with lids, above the connecting coupling a discharge tube is installed, under it a receiving tube is installed, above it a ball valve is installed, top discharge tube passes through the manifold chamber, lid and goes outside, on it the inlet union valve is installed to inject air in the manifold chamber and safety union valve for overpressure relief, the pneumatic chambers are located one above, and another below the inlet holes in the sampler casing, in top lid of the sampler the outlet valve is installed, casing pipe is made out of n pipes connected by outside thread coupling, with side holes of same diameter uniformly distributed along length of the casing pipe-well.

EFFECT: simplified design.

3 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to equipment for determining consumptions and periodic water sampling from different horizons of a peat deposit, which are fixed as to depth. The complex includes a well casing pipe with a cone tip and a water intake structure. Besides, a sampling unit includes a cylindrical housing, on which there located are two elastic rubber cuffs with diameter equal to well diameter; in the wall of the cylindrical housing there are side holes - a middle one - for water receiving from a working horizon and is located between two cuffs; an upper one is located above the upper cuff; the lower one is located under the lower cuff; upper and lower holes are of a transit type and connected to each other with a tube passing inside the cylindrical housing of the sampling unit; the lower part of the cylindrical housing is connected to the water intake structure through a flange attached to the cylindrical housing; the upper part of the cylindrical housing is connected to a bracket for lifting the sampling unit and the water intake structure connected to it, the diameter of which is lower than inner diameter of the well casing pipe; the well casing pipe is pipes from one to N, which are connected to each other with external threaded couplings and side holes made throughout length of the pipes.

EFFECT: simpler design.

2 cl, 2 dwg

Wellhead equipment // 2547028

FIELD: oil and gas industry.

SUBSTANCE: wellhead equipment includes a housing, a shutoff valve, a casing-head stuffing box and a sampler. The sampler is installed outside the housing and made as a hollow blinded cylinder with a piston. The sampler is equipped with an adjusting device generating counter pressure. The adjusting device may be made as an adjustable valve or as dead weights.

EFFECT: improved quality of the taken sample and excluded necessity of welding a branch with a sampler in a manifold line.

4 cl, 3 dwg

Wellhead equipment // 2546707

FIELD: oil and gas industry.

SUBSTANCE: wellhead equipment includes pipe supports of the first and second rows of pipes, a seal nipple of the first row and samplers. The seal nipple is made as a bushing with conical surfaces at ends. In the pipe supports of the first and second rows there are bevelled edges made so that they may interact in a sealed way with the conical surfaces of the seal nipple. Each sampler is made as a hollow blinded cylinder with a piston; it is also equipped with an adjusting device generating counter pressure. The adjusting device may be used as an adjustable valve or as dead weights installed at the piston or cylinder.

EFFECT: simplifying the installation of the seal nipple, improved quality of the taken sample and exclusion of welding operations at the well head for welding of sampling cocks with branches.

4 cl, 2 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement of total gas content in non-traditional container rocks, such as gas-bearing container beds, which may be found in sedimentary rocks, volcanic or metamorphic rocks. The method includes stages of well drilling in the measurement range in a container bed to create a volume of drilling mud in annular space, which contains fragments of drilled rock and gas. At the same time the volume of annular space has the front edge and the rear edge, diversion of the front edge of the annular space volume so that entire volume of annular space is trapped in a degassing system for storage without its exposure to atmosphere, interruption of diversion of annular space volume after trapping of the front edge of annular space volume in the degassing system for storage in order to determine quantity of gas in terms of annular volume; and also in-situ calculation of the total gas volume in the container bed with account of gas and fragments of drilled rock in terms of fragments of drilled rock and gas, contained in the annular space volume.

EFFECT: increased reliability and accuracy of the method and the device for measurement of total gas content in non-traditional container rock.

25 cl, 2 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to a method and a system for analysis of fluid properties of a microfluidic device. Fluid is added under pressure to a microchannel, and phase states of fluid are optically detected in a number of places located along the microchannel. Gaseous and liquid phases of fluid are detected based on a variety of digital images of fluid in a microchannel. Two-level images can be created based on digital images, and a portion of liquid or gas in fluid depending on pressure can be evaluated on the basis of two-level images.

EFFECT: based on detected phase states of fluid, properties can be evaluated, such as values at the initial boiling point and/or distribution of volumetric ratio of fluid phases depending on pressure.

23 cl, 19 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to hydrodynamic and hydrochemical tests of waters of peat soils. According to the method, there determined is a law of distribution of a set of balance coefficients during different periods of unidirectional processes characterising relationship between chemical and hydrodynamic processes flowing as to thickness of a peat deposit. Flow rates of the incoming water are determined with a sampling complex. A calculation of balance coefficients of the obtained data is carried out by a unification method. They are brought to a uniform dimensionless form by a mathematical generalisation method. Change of a set of balance coefficients allows efficient assessment of a degree and dynamics of change of chemical water composition and its hydrodynamic mode due to duration and intensity of processes. Persistent interaction of balance coefficients distributed in time and depth shows balance of a swamp ecosystem.

EFFECT: determination of change of chemical composition of swamp waters as to depth of a peat deposit under conditions of their hydrodynamic mode in time.

8 tbl, 9 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: evaluation of fluid inflow fraction from every productive zone of multi-zone productive well comprises determination of pressure at wellhead. Integrated indicator curve (IPR1) is obtained to describe the relationship between pressure and fluid yield from first productive zone and integrated indicator curve (IPR2) is obtained to describe the relationship between pressure and fluid yield from second productive zone. Value for integrated indicator curve at the point of mixing (IPRm) is obtained with the help of IPR1 and IPR2. Initial fluid inflow fraction from first productive zone at mixing points and initial fluid inflow fraction from second productive zone are defined. First total curve of outflow (TPR1) is obtained describing the relationship between fluid pressure and yield, fluid flowing from mixing point to wellhead. First portion of fluid inflow from first productive zone (Q11) and first portion of fluid inflow from second productive zone (Q21) are defined at mixing point with the help of IPRm and TPR1. Machine-readable carrier accessible for processor comprise program including instructions for above listed jobs.

EFFECT: more efficient evaluation of the portion of influx from productive seam.

20 cl, 5 dwg

FIELD: instrumentation.

SUBSTANCE: set of inventions relates to sampling of formations and to analysis at formation estimation and testing. Module of transducers for metering unit is configured for in-well operation. Module of transducers comprises set of transducers for measurement of the formation selected parameters and control system for selective and independent operation of every said transducer of said set. Every said transducer is configured or designed as a discrete transducer element for individual communication and control. Every said transducer can incorporate electronics module to couple electronic components with control system.

EFFECT: perfected in-well transducer systems, hence, enhanced performances.

26 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: during development of multilayer oil deposit working fluid is injected through injectors with common well screen. Extraction of the reservoir product through producers is also performed with common well screen. The upper layer is developed in the mode of injection to withdrawal ratio by injection of working fluid at discharge pressure according to injectivity of the stratum. A pit is arranged close to the injector and working fluid is pumped through this pit to the injector with increased injection pressure sufficient for entry of working fluid both to the upper and lower strata. Producers are operated in the mode of permanent bottomhole pressure. Upon reaction of the producers to increased pressure of working fluid injection the development is continued in the mode of injection to withdrawal ratio by injection of working fluid. Injection to withdrawal ration is redistributed for two strata simultaneously from producers with high water cut and high bottomhole pressure to producers with low water cut and low bottomhole pressure. For this purpose at producers with increasing water cut operation time of pumping equipment is reduced at permanent bottomhole pressure. At producers with low water cut operation time of pumping equipment is increased at permanent bottomhole pressure.

EFFECT: improving oil recovery of the deposit.

1 ex

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is referred to versions of a control unit and a produced fluid flow meter for a multipay well. According to the first version the unit comprises a body limited from bellow by a docking device with channels for formation fluid flows and from above by a docking device with adjustable valves installed on it in the quantity equal to that of operated formations. In the body there are interconnected cups, which are coupled hermetically by their hollow butt end to the upper docking device, and cylinders installed by the opposite end in the respective channels of the lower docking device thus forming a tubular annulus and to detached longitudinal channels intended for fluid flows from the respective formations at the wellhead. In the cups there is a crossover seat with radial channels in the cup wall along both sides of the seat. Below the crossover seat from the side of the cup end there are radial channels. Above the crossover seat there is a needle valve made as a slide; at the latter there is a gasket, which facilitates the sealed movement of the needle valve in the cup from an electric drive placed in the sealed part of the cup and fixed in the docking device transferring reciprocal motion to the needle valve in regard to the crossover seat. Electric drives of the needle valves are equipped with devices measuring linear movements of the needle valve with Hall sensors. In the longitudinal channels of the cylinders there are instruments coupled functionally by a cable to a telemetry unit and/or well power supply and/or control point placed in the cup wall so that it may transmit control commands to adjustment valves and data on process parameters of the fluid in the well formations through a cable connector. In the second version of the unit in the cup below the crossover seat there is a channel axial to the crossover seat connecting the longitudinal channel to the tubular annulus and the instruments are placed in the wall of each cylinder and interconnected by a cable in the tubular annulus.

EFFECT: improved reliability for the dual operation of the multipay wells.

4 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to mining and can be used for selective flow regulation in a multilateral well. Pipe string system is formed for selective regulation of separate fluid mix flows with varying speeds for well construction, injection or production of mixes of fluids, gases and/or solid particles that can be injected to, or produced from one or several close zones of ground bore, ground cavern, hydrocarbon or geothermal reservoir. Fluid mix running through radial passage in distribution reducer of the pipe string system between the strings and at least one other pipe can be regulated by at least one flow regulation element connected to a concentric and/or annular passage closest to axis line. Fluid medium transfer can be adjusted selectively in different configurations of one or several mainly hydrocarbon and/or mostly water wells below the common main wellbore and wellhead equipment.

EFFECT: enhanced efficiency of flow regulation in a multilateral well.

20 cl, 123 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes mounting in the well of a pump unit consisting of flow column, driven centrifugal pump and reciprocating pump, a cable feeding the electric drive of the centrifugal pump from the ground control station, a packer with cable entry separating strata in a certain interval of the well, and submersible telemetry systems related by a cable with the control station. When mounting is complete, the above pumps are started simultaneously or separately in order to pump out fluid from strata through the flow column to the well surface with potential recording of their flow rates at the control station. Depending on volume of gas extracted by the lower stratum of the well fluid pumping out by the centrifugal pump is made either by direct flow through the flow column or through a nozzle of liquid jet ejector installed downstream the reciprocating pump with potential gas cap releasing from below-packer annulus cavity of the well; to this end turbulent fluid flow at output of the centrifugal pump is transferred to laminar flow. When fluid pressure drops at output of the centrifugal pump and/or power consumed by the pump is exceeded, then underground washing of the centrifugal pump is made. To this end the reciprocating pump and liquid jet ejector are removed from the pump unit by the installation tool and a bypass unit consisting of coaxial pipes with communicating radial channels is installed instead of the ejector. Then from the well mouth along the flow column through coaxial cavity and radial channels of the bypass unit washing fluid is pumped to below-packer annulus cavity of the well; the centrifugal pump is washed under pressure of washing fluid through input module and the used fluid from the latter is directed under remaining pressure through coaxial cavity and radial channels of the bypass unit to the well moth though below-packer annulus cavity of the well. Upon completed washing of the centrifugal pump the bypass unit is dismounted and liquid jet ejector and reciprocating pump are installed at its place, then pumping of the fluid from strata to the well surface is continued.

EFFECT: reduced labour costs for maintenance of the well.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes separate run and installation in well of the pipe string with packer system for two production reservoirs comprising packers, between packers pipe, perforated branch pipe and polished insert. At that top packer has directing funnel and maximum possible diameter of the through channel sufficient for pipes and devices assembly passage. Separate run of pipes string equipped with electric submerged pump, tail, bottom secured pump equipment, or remote control unit, or tight or untight casing of the electric drive presented by string of pipes or rods, on which as least one packer separated reservoir liquid flows, controlled electrical or electromechanical valves regulating or disconnecting fluid supply from the reservoirs to the well, units of sensors monitoring work parameters of the reservoirs, sensors are located within the perforation depth of each production reservoir or above perforation depth of each production reservoir. At that pressure and temperature sensors are located under solenoid or electromechanical valves, thus ensuring regulation of the bottom hole pressure and control of the reservoir pressure and temperature. Humidimeters and flowmeters are located above the solenoid or electromechanical valves or under the solenoid or electromechanical valves. Control of the solenoid or electromechanical valves and information exchange with units of sensors of work parameters of the reservoirs are performed over the both separate electric line having at least one core, or as forth core of submersed power cable of the electric pumps, or via separate electric line instead of the forth core of the submerged power cable of the electric pumps, or from "zero point" of the electric submerged pump, or from the remote control system of the electric submerged pump. If electric line is routed over casing of the submerged motor can or can not be used the insert out of electric line with small diameter closed against mechanical damages by the protective enclosure or by protectors, or can be closed or unclosed against mechanical damages by the enclosure installed similarly to the cooling enclosure of the electric-centrifugal pump. The tail can be equipped or unequipped with emergency disconnector with shear elements designed for definite load, with stroke compensator of thermobaric changes of length of pipes string. Based on the data provided by sensors the optimal modes of simultaneous separate or successive operation of the productive well reservoirs are determined. Determination of the optimal operation modes of the reservoirs and their further updating are performed by operation of valve units that control operation of the reservoirs under automatic or manual modes, automatic system of operation control of the well system ensures remote on-line monitoring of the field development system and to make corrections to operation modes of the well reservoirs.

EFFECT: improved efficiency of well control upon simultaneous and separate operation.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: installation comprises underground equipment assembly run in the well using the pipes string, including funnel-positioner, lower packer, reducer-positioner, device of injection distribution, top packer, extension. Device of injection distribution contains casing and removable parts, is equipped with to independent pressure gauge, middle independent pressure gauge, and bottom independent pressure gauge. Top and bottom unions are installed in the removable part of the device of injection distribution with possibility of both unions removal by one round run operation.

EFFECT: assurance of possibility of information acquisition on injection pressure upstream and downstream each union for long time period, reception of reliable data on injection mode, increased process reliability.

4 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: aggregate includes lifting string, cable, liner, packers, electric immersed pump with check valve for product extraction with input unit and electric motor, a housing encasing the motor with cable and input unit and connected to the liner featuring several channels each entering a well section, pressure gauges with functional connection to aggregate control unit, switch valve with case and shutting unit, positioned downstream of the housing and connecting a well section with the housing space through respective channel. Switch valve features a stem with lengthwise channel connecting space under the valve to the housing, and the check valve is mounted in the lengthwise stem channel. The stem travels by a limited longitudinal path together with the check valve down under effect of differential pressure in the lift string and liner channel entering a well section, or up under effect of the produced fluid flow. The stem can engage with actuator that can open liner channels in turns while shutting the other channels upon each reciprocal travel of the stem.

EFFECT: enhanced efficiency of dual bed operation in a well.

5 cl, 3 dwg

FIELD: mining.

SUBSTANCE: method comprises pumping oil from a lower layer by the centrifugal pump with feeding under pressure of liquid jet ejector into the nozzle. Using this ejector the oil from the upper layer is simultaneously pumped with oil from the lower layer through the column of oil-well tubing to the wellhead. At that the oil from the lower layer is pumped to the nozzle of the liquid jet ejector with laminar flow of oil flow with low gas content. Pumping oil at the wellhead is carried out with a centrifugal pump with the pressure given by the condition of the pressure distribution on the rise of the oil masses from the lower layer to the nozzle of the liquid jet ejector and oil mixture from both layers along the column of oil-well tubing and the work of the liquid jet ejector. The flow cross-sections of the nozzle and the mixing chamber of the liquid jet ejector are set directly proportional to production rate of the lower layer and the production rate of both layers of the wells, respectively.

EFFECT: increase in reliability of operation of the well.

3 cl, 2 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: pump packer system includes a packer lowered into the well and put between formations and a pump unit above it, which consists of an electric motor with a cable, hydroprotection, telemetering, lower and upper pumps with receiving stations and a casing with a cable entry, the upper end of which envelopes the receiving station of the lower pump, and the lower end is located below the electric motor. The system is provided with a housing and a branch pipe with side outlet channels, the first one of which is connected from above to the lower end of the casing, and the second one is connected from above to the electric motor and from below to the packer. With that, the branch pipe is compacted in the housing and thus disconnects the cavity of the casing from the upper formation and connects it through side outlet channels to the lower formation. With that, the branch pipe is provided for fluid of the lower formation either with a control controlled with the electric motor or with a flow meter or with a mechanical check valve. The upper pump is connected with the receiving station to the lower pump, and the latter that is located above the casing is connected with the receiving station to the hydroprotection of the electric motor. With that, the receiving station of the lower pump is made in the form of an inlet module or a gas disperser, and the receiving station of the upper pump is made either in the form of an inlet module provided with a longitudinal through internal channel for a fluid flow of the lower formation and a cutoff with a side inlet channel for the fluid flow of the upper formation, which is controlled by electric, electromagnetic or hydraulic action, or in the form of an inlet module or a gas separator provided from below with a branch pipe with side outlet channels at backside of the well for fluid flow of the lower formation. The packer is either of mechanical action and is installed by creation on it, without any transfer to the casing, of the specified value of axial load from the weight of the pipe string with further maintenance or removal of this load after tight fit of the packer, or is of hydraulic action, provided with a disconnector and installed between formations before the pump unit is lowered by creation inside the packer of excess pressure, or is of hydrodynamic action and provided inside the well with a pulse tube transmitting discharge pressure of the upper pump to the hydraulic cylinder of the packer, or is of electric or electromagnetic action and is connected to the electric motor.

EFFECT: improving reliability and efficiency of a pump unit at simultaneous and separate operation of two formations of one and the same well.

5 dwg

Downhole pump // 2549937

FIELD: oil-and-gas industry.

SUBSTANCE: proposed unit comprises mouth power unit, downhole hydraulic drive with moving stepped plunger connected with said power unit via hydraulic channels to transmit sign-variable load via drive medium thereto. Downhole pump is connected with flow string. Besides, it comprises extra downhole pump connected with extra flow string. Said plunger represents a three-step design. Hydraulic drive chambers arranged between plunger steps and its case have hydraulic communication with top and bottom borehole displacement pumps. Plunger steps are arranged in separate adjacent chambers connected with drive hydraulic channels. Plunger mid section and extreme sections are sealed at outlet from every adjacent section.

EFFECT: higher reliability and efficiency of well operation.

4 cl, 6 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has operation columns of upper and lower well zones, placed eccentrically one inside the other in upper zone of well, double airlift column, mounted in upper well zone, and double airlift column, connected to operation well of lower well zone, separation column, mounted coaxially to operation column of upper well zone, and cementation pipe. According to invention, in a well with significant power of non-productive zone it is equipped with additional separating column with cleaning channels for lowering drilling tool therein and drilling well to lower well zone with removal of drilling slurry by double airlift column of upper zone through cleaning channels. Additional separating column is combined coaxially with operation column of lower well zone and is rigidly fixed to separation column.

EFFECT: higher efficiency.

1 dwg, 3 cl

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