Mechanical counting device for downhole tool, downhole tool with this device and fracturing method with its use

FIELD: mining.

SUBSTANCE: mechanical counting device is proposed to be installed in the downhole tool and comprises a tubular housing with a channel, the first set of projections on the tubular housing shifted radially relative to the channel of the tubular housing between the projected and radially retracted positions, the second set of projections on the tubular housing shifted radially relative to the channel of the tubular housing between the projected and radially retracted positions. The tubular housing is made with possibility to advance linearly over the tool in accordance with the object shifted on the tubular housing and consistently interacting with the first and second sets of projections. Versions of the downhole tool with this counting device are also provided and methods of operating it.

EFFECT: downhole tool may be put in operation selectively.

26 cl, 11 dwg

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to mining and may be used to control a flow of a fluid medium in an underground well. Control of the fluid medium flow is carried out autonomously under the variation of a parameter of the fluid medium flow, for instance, density or viscosity. In one version of realisation the mechanism of flow divergence may move between the open and closed positions under the action of a variation of density of the fluid medium and perform the function of limitation of the fluid medium passage via an inlet of an assembled valve. This mechanism of flow divergence may rotate on the axis, rotate or otherwise move under the varied density of the fluid medium. In another version of realisation the flow divergence mechanism performs the function of control of the fluid medium flows ratio via two inlets of the valve. This ratio of flows is used to act at the valve control element, which limits the passage of the fluid medium via the valve. In another version of realisation the flow divergence mechanism moves under the action of variation in the fluid medium, thus causing the variation of the fluid medium flow scheme in the pipe section, and such variation of the flow scheme manages the operation of the assembled valve.

EFFECT: increased efficiency of fluid medium flow management.

49 cl, 28 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to mining engineering and can be used for well tools actuation. Mechanical counter for actuation of multiple output devices includes line indexing device that can count multiple actuation signals and conditions actuation of output devices when a given number of actuation signals is set for each output device. Mechanical counter can actuate a particular output device when a different actuation signal number is set. In this case, output devices are actuated sequentially.

EFFECT: improved reliability of well actuator.

23 cl, 11 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves landing of tubing string with packer to a well, packer seating, hydraulic fracture liquid injection by the tubing string with packer to a low-permeable formation, hydraulic fracturing of the low-permeability formation with further fracture fixation by injection of liquid carrier with propping agent via the tubing string, pressure relief in the well. Before tubing string landing to the well, water-bearing interlayer interval of the low-permeable formation is perforated to form perforation holes. Then at the wellhead the tubing string is filled upwards from the bottom with a plug, lower hole rows, packer, upper hole rows and additional packer. Inside the tubing string, a mobile bushing with radial channels is inserted to seal lower hole rows of the tubing string tightly in initial position and connecting the tubing string via upper hole rows and perforation holes to the ware-bearing interlayer. A seat is installed inside the mobile bushing, the mobile bushing and the seat are fixated in initial position against the tubing string by a differential shear element. The tubing string is landed to the well, packer and additional packer are seated in the well so as to shot water-bearing interlayer off tightly at two sides, upper water0bearing interlayer is isolated by injection and flushing of water isolation composition via the tubing string through upper hole rows to the water-bearing interlayer through perforation holes under pressure twice lower than hydraulic fracture pressure of the formation, process break is made for solidification of the water isolation composition, then a ball is dropped to the tubing string from wellhead, and overpressure is formed in the tubing string. First the shear element is destroyed, and under impact of overpressure above the ball, mobile bushing is shifted down along the tubing string to a stop against the tubing string plug, overpressure increase in the tubing string is continued, and the shear element is destroyed again. The seat is brought down to a stop against the plug under impact of overpressure above the ball. Upper hole rows of the tubing string are shut off tightly by the mobile bushing, and lower hole rows are connected to the tubing string by radial channels of the mobile bushing.

EFFECT: improved efficiency of hydraulic fracturing.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to mining and may be used in a string or equipment for wells completion. The mechanical sliding sleeve (101) includes a guard (105) with openings for interconnection with fluid, the first adapter (103) connected to the sleeve guard and the second adapter (107) connected to the sleeve guard. An insulating bushing (201) is placed in the inner channel formed by the sleeve guard, the first adapter and the second adapter thus forming an opening (113) for interconnection with fluid. The insulating bushing slides along contact surfaces between the first adapter, the second adapter and the sleeve guard in between the open position when fluid comes through openings and the closed position when fluid passage is prevented through openings. The sealing element is coupled functionally to the sleeve guard, the first adapter, the second adapter and the insulating bushing in order to prevent fluid passage through openings when the sleeve is not in the open position and to insulate at least part of contact surfaces from contact with borehole fluids.

EFFECT: improving operational efficiency of the sliding sleeve.

15 cl, 15 dwg

FIELD: mining.

SUBSTANCE: fluid supply device features sensor of plugs (darts, balls, etc.) passing through tool. Actuator shifts tool insert after a preset number of plugs has passed through tool. Insert shift opens catcher in tool bushing. After next plug discharge, catcher connects to the plug in bushing so that fluid pressure applied to the plug installed in tubing string can move the bushing. Shifted bushing opens windows in tool, connecting tool channel to surrounding annular space, thus enabling treatment of formation interval adjoining well shaft to intensify flow. Actuator can use sensor of plugs passing through tool. Spring housed in tool can bend at approach to sensor when a plug passes tool, and sensor counts number of plug passes.

EFFECT: enhanced efficiency of multistage hydraulic fracture in one round trip operation.

32 cl, 25 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes simulating of formation and recording of data on borehole processes by a geophysical instrument run-in into the tubing string at a logging cable and self-contained instruments installed at the lower end of the tubing string. At that simulation of formation is made by breaking a breakable drain valve made of a brittle material of hemisphere shape and installed with a convex part downwards in the lower part of the tubing string; for this purpose a drill stem is fixed under the geophysical instrument and the geophysical instrument is run-in with the stem into the interval with speed sufficient to break the breakable drain valve. At that upper part of the tubing sting above the breakable drain valve is not filled with water and a packer is installed in tubular annulus at the level of the tubing string lower part.

EFFECT: increase of information content and reliability for borehole investigations; reduction of labour intensity, time consumption and equipment costs; possibility to use in wells with any producibility of the investigated formation.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: there is a description of pipe string for well completion installed in position neighbouring to zone or zones where hydraulic fracturing (HF) is to be performed and inflow is to be obtained. In preferable version its peculiarity concludes in valves with sliding couplings allowing implementation of at least two configurations; wide opening and opening of channel with filtering material located in it. Valve unit may have three positions where a position of complete closing is added to two above mentioned positions. After run-in-hole operation valves may be set to position of wide opening in any order required for HF. After completion of HF valves may be either closed or set to filtering position in a differentiated way to get inflow from the zone subjected to HF in any required order. There are various methods for valves actuation described. Pipe string may be provided with telescopic forcers providing HF if it is required to do string cementing. According to alternative version pipe string run in uncased well is just provided with holes for HF liquid passing through and outer packers for provision of HF in any required order.

EFFECT: proving HF in separated zones of formation in required order.

40 cl, 33 dwg

FIELD: oil and gas industry.

SUBSTANCE: multiposition device for selective switching over of flow through packer spindle between opposite directions contains: packer with packer spindle and sealing element designed so that spindle is retained in underground location when sealing element is in seating position; housing of crossflow coupling including components moved relative to each other and adjusted for its selective attachment near upper part of mentioned retained independently packer spindle, at that housing of cross-flow coupling when it is attached near upper part of packer spindle is able to generate relative movement providing opening and closing of channel on housing of cross-flow coupling.

EFFECT: reducing total length of device, orientation of device with higher accuracy.

13 cl, 6 dwg

FIELD: oil and gas production.

SUBSTANCE: down-hole valve includes housing with channel going through it, ball with through hole installed with the possibility of turning at its axis without longitudinal movement so that through hole coincides and not coincides with the said channel. The said ball axis is installed with the possibility of selective longitudinal movement in relation to the housing not depending upon the said turning.

EFFECT: increase of valve operation reliability via reliable keeping of open and closed position.

13 cl, 9 dwg

FIELD: oil and gas industry.

SUBSTANCE: selective well completion device includes a tube slide valve installed on the tube, the body of which is connected to the section of casing string, which is located opposite the productive formation and equipped with holes. Slide valve is equipped with two ring-shaped stops by means of which it is connected to the catch from time to time. Catch includes cylindrical housing with spring-loaded extendable cams and conical brace with a drive, which are located in it, and is connected by means of mechanical draft to the ground lifting mechanism attached to the ground power supply and control unit. At that, the device also includes independent electrical power supply located in the catch housing and made in the form of electrical accumulator or a set of electric batteries, at least two reed relays, similar number of signaling devices - electric lamps and at least three concentrically ring-shaped constant magnets installed in the well, as well as two radio contact devices mutually connected by means of radio on air. One of radio contact devices is located on the catch and equipped with the antenna in the form of electroconductive mechanical draft and connected to the independent power supply, and the other one is located on the ground surface and is connected via control unit to the ground power supply. Mechanical draft is flexible and made in the form of electroconductive rope. Drive of the brace includes electric heater equipped with thermostat, the working member located within its coverage and having the effect of shape memory in the form of straight-line wire from titanium nicelide and reverse element of the working member which is balanced and made in the form of a brace, and electric heat-insulating housing. At that, through the radio contact device fixed in the catch, the heater and each reed relay is separately connected to independent power supply, and by means of both radio contact devices the heater through the control unit and each reed relay separately through the control unit and one of the lamps are connected to the ground power supply.

EFFECT: enlarging functional capabilities of the device.

3 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to mining engineering and can be used for well tools actuation. Mechanical counter for actuation of multiple output devices includes line indexing device that can count multiple actuation signals and conditions actuation of output devices when a given number of actuation signals is set for each output device. Mechanical counter can actuate a particular output device when a different actuation signal number is set. In this case, output devices are actuated sequentially.

EFFECT: improved reliability of well actuator.

23 cl, 11 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes placement of equipment along continuous pipeline with diameter less than diameter of tubing string, arrangement of the lower end of continuous pipeline with attachment with sealed and permanent connection in borehole environment, joint running in of continuous pipeline and tubing string. The attachment is made as a cone with its peak oriented downwards. Diameter is determined for the cone, which is made with diameter less than inner diameter of the borehole per diameter of tubing string. Continuous pipeline is fixed rigidly in the cone concentrically. At first the continuous pipeline with cone is pushed to horizontal or directed borehole until it is stopped in abnormal interval of the borehole; whereupon tubing string at the wellhead is equipped with a plug and operational equipment, tubing string is run down to horizontal or directed borehole in parallel to the continuous pipeline up to thrust of the lower end of tubing string to butt end of the cone base, then tubing string is unloaded to the cone and continuous pipeline is pulled until they leave abnormal interval of the borehole; thereafter the continuous pipeline is pushed with cone up to bottomhole and tubing string is set in the preset interval for operational equipment in horizontal or directed borehole.

EFFECT: higher efficiency and reliability of equipment delivery.

1 dwg

FIELD: mining.

SUBSTANCE: as per method of hydraulic fracturing of underground medium, many sliding couplings are placed in a well passing into underground media; sliding couplings are placed in mutually spaced places along the well and provided with a possibility of control after arrangement in the well in any specified sequence; many signal devices are moved along a control line arranged in the well; each of the signal devices opens at least one of the multiple sliding couplings and performs hydraulic fracturing of underground media in any specified sequence in mutually spaced places along the well passing into underground media; sliding couplings are used at hydraulic fracturing and left in the well at performance of hydraulic fracturing.

EFFECT: optimisation of stresses created due to hydraulic fracturing from mutually spaced places along the well shaft.

16 cl, 5 dwg

FIELD: mining.

SUBSTANCE: in process of drilling on a casing string the drilling mud is pumped via a discharge pipeline leading into a channel in the grip of the casing string and downwards along the casing string. The drill string assembly is installed on the lower end of the casing string for drilling of the well bore. The drill string assembly bottom is raised by installation of the circulation sub with a side outlet hole in the casing string below the grip of the casing string. The return flow line is used to connect the outlet hole with the circulation system. The operator supplies fluid medium downwards along the circular space behind the casing string and back upwards along the casing string, providing for upward movement of the drilling string assembly bottom. The fluid medium passing back upwards along the casing string is drained via the outlet hole in the circulating sub into the circulation system without passing through the channel in the grip of the casing string.

EFFECT: increased efficiency of raising a drilling string assembly bottom.

20 cl, 14 dwg

FIELD: mining.

SUBSTANCE: drill string assembly bottom for drilling on a casing string is connected as capable of release with a casing string. The lifting tool is lowered in the casing string and fixed on the drill string assembly bottom. Wedge grips are installed on the lifting tool and are drawn-in in process of lowering. The pressure difference moves the lifting tool and the drill string assembly bottom upwards, and wedge grips are engaged with the casing sting to prevent downward movement, if the pressure difference reduces too much. The channel stretches via the lifting tool and the drill string assembly bottom. A check valve in the lifting tool provides for flow passage downwards via the channel, but it prevents passage of the flow upwards, therefore, fluid medium may be circulated via the lifting tool and the drill string assembly bottom suspended on wedge grips.

EFFECT: increased efficiency of raising a drilling string assembly bottom.

20 cl, 14 dwg

FIELD: mining.

SUBSTANCE: drill string assembly bottom in process of the drilling operation on a casing string is raised by displacement of fluid medium in the casing string with the fluid medium of less density compared to the fluid medium in the annular space. The drill string assembly bottom moves upwards in the casing string under action of upward force specified by different density of fluid media in the casing string and in the annular space. The displaced fluid medium exits from the casing string via a throttling hole of the nozzle that limits the flow. The throughput section of the throttling hole varies in process of movement of the drill string assembly bottom upwards to control speed of upward movement of the drill string assembly bottom.

EFFECT: increased efficiency of raising a drilling string assembly bottom.

20 cl, 14 dwg

FIELD: mining.

SUBSTANCE: during operation in casing string, drill string bottom layout is raised by reducing fluid density in casing string above drill string bottom layout, creating upward force applied to drill string bottom layout. When drill string bottom layout is lifted in casing string, fluid is pumped to top end of annular space, and displaced fluid is discharged from top end of casing string. Fluid flow supplied to top end of annular space is monitored and compared to displaced fluid flow discharged from casing string.

EFFECT: enhanced efficiency of drill string bottom layout lifting.

20 cl, 14 dwg

FIELD: mining.

SUBSTANCE: drill string bottom layout is raised through casing string by reducing drilling mud density in casing string above drill string bottom layout to a value below drilling mud density in annular space behind the casing string. Drill string bottom layout moves up the casing string under effect of force generated by fluid density difference. During upward movement, less dense fluid displaced by raising drill string bottom layout exits casing string. When drill string bottom layout stops rising wedge, slips suspend the layout in middle point in casing string. Then operator reduces drilling mud density in casing string below drill string bottom layout once more creating upward force affecting drill string bottom layout by raising it upwards in casing string.

EFFECT: force required to release and raise drill string bottom layout is created.

20 cl, 14 dwg

FIELD: mining.

SUBSTANCE: system comprises a separate hydraulic line for transfer of a signal device, capable of generation of one or several individual signals to one or more tools in an underground well. Each tool may be equipped with a reading device to receive signals from the signal device and to send signals to the signal device. Each reading device may control action of a tool connected to with it, if the reading device is programmed to react to signals received from the control device. The working liquid of the hydraulic system used for control of tool action may move along the separate hydraulic line or an individual hydraulic line. The individual hydraulic line may be used to return the tool into the initial position. At the same time the control line have a channel with a diameter sufficient for displacement of the signal device through it, but insufficient for provision of commercial quantities of produced fluid media.

EFFECT: increased efficiency of tools control in a well bore.

44 cl, 10 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to drilling horizontal wells for which measurements should be made. Proposed device comprises connectors for connection at well bottom with diagraphy cable arranged inside drill rod carrying said support device, means for communication drill inside with support device outside part. Note here that said communication means are arranged between said probe and said communication means. Proposed device comprises also swinging shutter arranged between communication means and connectors to allow fluid circulation from inside to outside and preventing it circulation from outside to inside of said support device.

EFFECT: higher safety in horizontal diagraphy.

6 cl, 3 dwg

FIELD: mining; transporting.

SUBSTANCE: invention is designed for lowering geo-physical apparatus and for supply of process fluid at performing geo-physical works and process operations in wells. The method of delivery equipment into a required interval of a well consists in placement and lowering equipment on a wire or cable, or load carrying capillary pipeline or geo-physical cable along a continuous pipeline of a diameter less, than a diameter of pump-compressor pipes (PCP); the equipment is secured on the exterior surface of PCP. The continuous pipeline is lowered together with PCP, while displacement of equipment in the continuous pipeline is performed due to hydro-dynamic pressure of fluid or gas supplied into the continuous pipeline.

EFFECT: facilitating delivery of equipment into required interval of well of various profile and facilitating changing position of equipment in well in process of operation.

2 dwg

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