Drill string overflow valve with screw well bottom engine

FIELD: oil and gas industry.

SUBSTANCE: device comprises a body with threaded projection in its lower part and an inner thread in the upper part, and radial holes in the middle part. In the body, there is a hollow step piston, a spring is placed on its lower step, in the wall of the piston lower step there is a first radial hole, a second radial hole made in the wall of the piston upper step. The piston has a middle step. A bushing is installed between the piston and the body. In the middle part of the bushing there is an inner circular belt which encloses the middle step of the piston. The first radial holes are made above the circular belt in the bushing wall communicating with radial holes the in body and with second radial holes made in the middle step of the piston. A conical bore is made in the upper step of the piston which inner diameter widens to the end face of the piston upper step, the bushing and the piston are fixed in a body in the working position by a nut, which inner surface is made conical and flush with conical recess of the upper step of the piston. The spring has a multilayer anticorrosive coating, its lower end is located in the lower circular groove which is made in the valve body.

EFFECT: reduced valve wear.

9 cl, 1 dwg

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: method includes the rotation and axial delivery of an assembly with a bit and supply of a flushing fluid through an inner cavity of the assembly to the bottomhole, in the flushing fluid loss zone the transfer of the fluid supply to an annular space over the downhole motor through the cross-over shoe by its activating. At the transfer of the fluid supply in the flushing fluid loss zone the isolating compound is supplied at a pressure of 2-6 MPa, flow rate of 8-12 l/s in a volume of 10-30 m3, upstream the injection volume drilling mud is placed, the assembly is put up to the drilling mud zone, pressure up to 3 MPa is generated in the annular space, the isolating compound is flushed to the loss zone in the full volume, the process is withhold until the isolating compound is set and hardened, the cross-over shoe is deactivated, circulation is restored and injection capacity is defined. If the injection capacity is less than 2 m3/h the drilling process is renewed.

EFFECT: increased efficiency of isolation for the flushing fluid loss zones at well drilling.

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the device and method of drilling with continuous bit rotation and continuous drill mud supply. The device for drilling rig that contains the first drilling machine with top drive, installed with possibility of vertical movement along guide, and second drilling machine installed between the first drilling machine and well with possibility of the vertical movement along the guide regardless of the first drilling machine with top drive and provided with rotary table, able to withstand weight of the drilling string, rotation drive ensuring continuous rotation of the drilling string, and mud chamber ensuring liquid connection between end of the drilling string and unit for mud supply, at that the mud chamber is equipped with holes for the drilling string containing devices that can close holes for the drilling string ensuring liquid tightness. The second drilling machine is also equipped with the driven casing tongs that ensure connection and disconnection of the element and drilling string, at that the specified driven casing tongs are installed in the mud chamber and are made with possibility of vertical movement to connect/disconnect element and drilling string.

EFFECT: connection/disconnection of pipe elements with drilling string is ensured with continuous bit rotation and with continuous mud supply.

10 cl, 7 dwg

FIELD: construction.

SUBSTANCE: invention relates to construction and processing (deactivation) of drilling wastes together with secondary wastes of thermal utilisation of oil slurries with ash and slag mixtures so that road-building composite materials are obtained. The task at which this invention is aimed is to create a processing method of drilling wastes on the territory of a cluster site. The processing method of drilling sludge on the territory of the cluster site involves arrangement at the site of components of the mixture and a processing capacity, placement of drilling sludge into the capacity, addition to the sludge of components and mixing of the mixture with an excavator so that road-building composite material is obtained; with that, the processing capacity is installed into soil so that its upper edge is elevated above relief to the height of not more than 0.5 m.

EFFECT: reduction of costs for transportation of wastes to the nearest sludge pit, a possibility of processing of drilling wastes immediately after their formation, a possibility of using secondary materials obtained as a result of processing at the site.

6 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to drilling. Proposed system comprises the components that follow. Downhole device for decreasing of drill string vibration and injection and superhigh-pressure drill bit for downhole injector. Said downhole device for decreasing of drill string vibration and injection includes high-pressure channel. Said superhigh-pressure drill bit comprises channel to transfer superhigh-pressure mud fluid. Said channel to transfer superhigh-pressure mud fluid comprises superhigh-pressure mud fluid channel, high-pressure hose and high-pressure stiff pipe. Said high-pressure channel communicates with superhigh-pressure mud fluid transfer channel. One end of said high-pressure hose is connected with said superhigh-pressure mud fluid channel while opposite end of said hose is connected with high-pressure stiff pipe. Opposite end of said high-pressure stiff pipe is connected with superhigh-pressure mud fluid nozzle. Method for decreasing of drill string vibration uses the source of power generated by pressure oscillation at drill bit body. Besides, it exploits mud fluid forced into downhole device for decreasing of drill string vibration and injection after shunting by shunting mechanism. Note here that major part of mud fluid is forced through common pressure nozzle. Mud fluid remainder is forced to power converter via intake one-way valve in said downhole device for decreasing of drill string vibration and injection. Power source and power produced thereby are used to release mud fluid minor portion via discharge one-way valve connecting the high-pressure channel. Besides, superhigh-pressure mud fluid nozzle generates superhigh-pressure jet to facilitate rock destruction directly or indirectly. Power converter is composed of seal assembly, injection cylinder and cylinder guide bush.

EFFECT: higher rate of drilling, stability, reliability and safety.

13 cl, 11 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes drilling of a well borehole by an assembly with the lower power drive and usage of a circulation fluid as a drilling mud. A loss zone is entered and drilling is transferred to the drilling mud, at entry to the loss zone rotary assembly or the upper power drive is switched, a drill string is rotated with a rate of 60-90 rev/min, consumption rate of the drilling mud is set equal to 18-20 l/s at the wellhead pressure of 1-2.5 MPa, the drilling mud is used with a viscosity of 60-90 CP, at the entry to the loss zone cuttings are introduced in a quantity up to 30% of the drilling mud volume and in the progress of the loss zone the passage quantity of cuttings in the drilling mud is reduced up to 8-12% at the loss zone end, the well is washed by the drilling mud without cuttings with a viscosity of 40-60 CP, with the consumption rate of 30-35 l/s and the wellhead pressure of 1-2.5 MPa and drilling is continued till the design reference mark.

EFFECT: improved reliability of the loss zone isolation, sticking of drilling tools is excluded.

FIELD: oil and gas industry.

SUBSTANCE: while implementing the method a tubing string is run in to a well up to a bottomhole with a tube having a diameter more than the diameter of the tubing string with triangular windows and inner sharp tabs faced upwards under an angle of 25-30 to the vertical, circulation of the borehole fluid with a consumption rate within limits from 3.5 up to 8 l/s through the annular space, tube and tubing string through a holding tank in the volume not less than the well volume and lifting of the tubing string with the tube from the well.

EFFECT: raised efficiency of the well cleaning.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes drilling of a well, running in of a production string to a horizontal part of the well with a mud-inflatable packer, a stop ring and a stage cementing collar at the end, injection of the cement grout to the annular space, the process withhold for the time of the cement hardening, drilling of the stop ring and collar and the well development. At running in the production string is stopped at a distance from the bottomhole, drilling of the stop ring and collar is made with the usage of a drilling fluid with a density from 1.20 up to 1.25 g/cm3, it is injected with a rate of 18-21 l/s at a pressure of 8-10 MPa at the wellhead. The interval from the production string end till the bottomhole is worked out by a bit, the well is washed by the drilling fluid at a wellhead pressure of 8-10 MPa, a filtering string of a low diameter is run in through the production string and an interval from the bottomhole until the production string is covered with partial covering of the production string end; the filtering string remains in the interval of the productive formation. At running in the production string is stopped at a distance from the bottomhole equal to 50-150 m. Partial covering of the production string end by the filtering string is made per 5-10 m.

EFFECT: increased well productivity.

3 cl

FIELD: oil and gas industry.

SUBSTANCE: method includes drilling by an assembly with a hydraulic downhole motor, periodical reciprocating of a drilling string in the complicated zone with simultaneous rotating. Drilling is performed by a bit having a diameter of 220.7 mm, a sloughing rock horizon is drilled and the drilling fluid is used with a density of 1.3-1.4 g/cm3, viscosity of 50-90 CP, load to the bit is maintained within limits of 10-15 t, the drilling fluid is injected with a rate of 32-45 l/s, the productive formation is entered to a depth of 1.0-1.5 m with a zenith angle of 75-85 degrees. The sting below assembly is lifted above the sloughing rock horizon, the process is withheld within 1-2 hours, and the assembly is lifted from the well, logging survey is performed and the same assembly is run in. At running in the setting intervals are worked out, the assembly is lifted out of the well, the production string is run in to the bottomhole with a lower section of casing pipes, a docking device and an upper section of drill pipes, the borehole annulus of the lower section is cemented, the upper section is disconnected from the docking unit, the upper section of the drill pipes is lifted and the casing string with a diameter of 177.8 mm is run with the length from the docking device up to the wellhead, the strings are lined up and the borehole annulus is cemented. A packed-hole assembly with a bit of a diameter of 155.5 mm is run in inside the production string, the interval of the sections line-up is worked out and drilling of the productive formation is continued.

EFFECT: excluded sticking of drilling tools when passing the well through complicated zones.

FIELD: oil and gas industry.

SUBSTANCE: method comprises the creation of drilling fluid circulation using the direct layout of washover by pumping through the drilling pipe string with bit, lowered into a well of main drilling fluid and drilling fluid with viscosity, ensuring the increased cutting-carrying capacity. An aerated flush fluid is used as a drilling fluid. During washover with aerated flush fluid the drilling pipes are lowered at the axial speed 20 m/h and at rotational speed 40 rpm. After passing of each 5 m the string lowering is paused and it is raised by 2 meters, the circulation with aerated flush fluid is performed at increased flow rate during 15 minutes, then the lowering is continued. Polymeric bars from acrylic copolymer, soluble paper and soluble cork soluble in aerated flush fluid are used as a drill fluid with the increased cutting-carrying capacity. Bars are thrown off into the pipe string from the wellhead at extension of each pipe of the drill column, starting from the interval of build angle of open borehole above higher 40 degrees at washover of horizontal well and until achievement of the open borehole foot.

EFFECT: washover performance, drilling fluid stability is increased, probability of differential sticking of the string is decreased.

2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: device comprises cylindrical case with inner cavity, thrust ring and valve. Said cylindrical case can be secured to tubing. Note here that case thrust ring has high-pressure channel for hydraulic communication of cylindrical cavity with hole annuity. Half the circumference of cylindrical case bottom end is composed by saw-like ripper while another half has skew cut. Case thrust ring on ripper side has at least two high-pressure channels, aligned with case axis. Hole is made in the case thrust ring on skew cut side, off centre of case axis. Valve arranged inside the case opposite said bore to allow the down-up flow is composed of valve box with ball fitted in thrust ring bore. Valve box is rigidly secured to thrust ring.

EFFECT: higher reliability and efficiency of flushing.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: downhole tool includes a drill bit on its lower end and a drill motor containing a casing with a rotor rotating in the rotor channel in the casing when the drill tool passes through it. The rotor has a bypass channel for bypassing some portion of the drill mud via it. The valve includes a plate of the valve, which is installed upstream of the motor and has at least one flow pass and at least one bypass passing through the same plate. At least one flow pass is hydraulically interconnected with the rotor channel for passage of the drill mud passing through it. The rotor is made so that it can be rotated in the casing. At least one bypass is selectively hydraulically interconnected with the bypass valve when the rotor is being rotated in the casing, and the bypass channel is selectively moved in a position of alignment with at least some part of at least one bypass for bypass of some part of the drill mud via it, thus generating an impact action on the hammer.

EFFECT: preventing seizures of a drill tool, reducing vibration, increasing drilling efficiency with a downhole tool so that the bit damage is prevented.

25 cl, 14 dwg

FIELD: oil and gas industry.

SUBSTANCE: method consists in movement of a housing of a continuous circulation tool to an adapter having a channel passing through it and intended for connection in a pipe string in the well and selective movement of drilling fluid between the housing and a side hole in the adapter; in addition, the continuous circulation tool includes a shutoff device, and actuation of a shutoff mechanism to introduce a shutoff element of the shutoff device through the side hole in the adapter for insulation of drilling fluid flow through at least one section of the channel. A system for carrying out well operations with continuous circulation of drilling fluid, which contains a continuous circulation tool interconnected with a tubular column of the well, which contains an adapter and is intended for selective shutoff of the drilling fluid flow to tubular column of the well, a pipe manipulating device near the adapter, which contains the following: a pipe wrench, pipe wrenches, a pipe wrench, a retaining wrench, a pipe wrench and a spinning wrench and a device for mechanised suspension and unscrewing of pipes.

EFFECT: maximum drilling speed.

34 cl, 27 dwg

FIELD: oil and gas production.

SUBSTANCE: device comprises a spring-loaded stop element, an elastomer seat with guide ribs, collars with central holes, valve seats. The valve is installed in the nipple of the hinged joint or torsion bar of the spindle in a screw bottomhole motor, in which holes are made for possible passage of a working medium.

EFFECT: simplified design, higher reliability.

6 cl, 6 dwg

Shaker machine // 2442876

FIELD: mining equipment.

SUBSTANCE: The invention relates to mining equipment, in particular, to shaker machines which create oscillations in liquid during direct and indirect flushing of mining equipment and well bottom, during bed stimulation and discharge of producing energy. The device comprises a frame where a rotatable crankshaft is installed on the axis. Furthermore, valves are fixed with pins at both ends of the crankshaft. The installation of valves at upper and lower part of the crankshaft allows to oscillate the liquid in both directions during direct and indirect flushing. The lower valve creates a hydraulic resistance to the liquid flow, reduces oscillation frequency for the upper valve, thus increasing the oscillation amplitude of the liquid.

EFFECT: production of the said device.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: borehole circulation adapter or valve includes tubular housing having external hole and valve piston installed with possibility of sliding inside the housing. Primary fluid medium flow trajectory passes through internal delivery orifice of the housing and valve piston. In the first position the valve piston covers the external opening for decoupling with fluid medium between internal delivery orifice and annular gap of well shaft. In the second position the valve piston moves to lock the internal delivery orifice and connect the external opening to internal opening and to establish the connection by means of fluid medium between internal delivery orifice and annular gap of the well. Dividing mechanism is fixed between the housing and valve piston for direction of movement of valve piston between the first and the second positions. In the versions of the implementation the dividing mechanism includes turning element.

EFFECT: random fluid medium circulation inside the well shaft, possibility of continuous operation of the valve and reduction of the valve stroke.

24 cl, 13 dwg

FIELD: oil and gas production.

SUBSTANCE: back valve consists of case with seat, and of locking device installed in bore, interacting with seat and equipped with spring elements in form of two plate springs. The locking device has two locking elements made of halves of circular cylinder by section of each with two mutually transverse inclined surfaces, upper one of which is inclined at angle below 90 to plane of cylinder circumference, while the side surface is inclined at the same angle to its axis. Upper ends of the locking elements interacting with the seat and their side interacting surfaces are covered with elastomer. A unit of fixation of locking and flexible elements in the case is made in form of a ring secured in the bore of the case.

EFFECT: simplified design, raised reliability and expanded functionality at minimal overlapping area of pass-through channel.

5 dwg

FIELD: oil and gas production.

SUBSTANCE: circulating valve consists of coaxial case and piston inter-engaged by means of pins and slots. The first system consists of a case, of a closer with channels communicating an internal cavity of the system with annular space of a well, of a packing, of an upper and lower arresters of piston travel; while the piston system consists of the piston with a throughput channel and a packing, of a valve switch with radial channels and of a compression spring. The throughput channel of the piston converges at an inlet section and diverges at an outlet section. At a section of maximal convergence a bypass channel is made in the piston; the channel hydraulically communicates the throughput channel with a behind-the piston cavity.

EFFECT: reliability of valve, reduced output of hydraulic power for drilling and hole conditioning.

4 cl, 9 dwg

FIELD: oil and gas production.

SUBSTANCE: valve consists of cylinder case with stepped hole and radial (overflow) hole. There can be several overflow holes. A holder in form of a segment is installed in the stepped hole of the case. In the holder there is made a cylinder cavity wherein there is installed a seat, ball, and a return spring positioned between a bottom of the cylinder cavity and the ball pressing the ball to a stop made in form of a cage with lengthwise holes for liquid flow. The seat is set in the stepped hole of the cylinder cavity and is clutched with the stop installed in the holder, by means, for example, of threaded connection. A threaded radial hole coaxial to the radial hole of the case for flow of liquid is made in the holder. A screw with filtering holes and a hole for flow of liquid is screwed into the holder through the radial hole of the case. The screw maintains the holder in radial and axial directions.

EFFECT: raised reliability and resource of valve operation.

2 cl, 3 dwg

Check valve // 2393326

FIELD: mechanics.

SUBSTANCE: check valve includes body with axial channel, seat, cover with rocker arm, which is suspended on the axis. Axis with elastic coating is installed in the body hole and in holes of protrusions of the rocker arm of the cover pressing the spring to the seat. The seat is formed with the seat bushing and the seat cup from elastic material. Inner groove of the body is provided with annular slot, and outer part of the seat cup is L-shaped and has a ring protruding towards the annular slot. Seat bushing is cylinder-shaped and made in the form of thin-wall ring and is intended for attachment of the seat cup. Body is cylinder-shaped and has two openings located opposite each other between one of the ends of the housing and middle part of the body.

EFFECT: simple design, improved operating reliability, and easy installation and removal.

2 dwg

FIELD: mining.

SUBSTANCE: invention relates to drilling technique and can be used as a valve unit for screw-type downhole motors in a drilling pipe string for connection or disconnection of the internal cavity of drilling pipes and the annular space following the pre-set technological sequence. The valve contains a case, a valve pair provided with a sliding ring, the seat mounted in the case and a hollow plunger accommodated inside the seat, with radial holes in them, a spring mounted on the hollow plunger and gaskets. The valve pair is of the slide type, in which the diameter of the flowing channel is 0.10-0.12 of the length of the hollow plunger and the area of all radial overflow holes of the hollow plunger is equal to the area of flow channel in the cross-section of the hollow plunger. The hollow plunger is of cylindrical form with the sliding ring and the circular collar, located in the lower part of the sliding ring and spring-loaded up to the stop by the upper end of the circular collar to the lower end of the seat. Radial overflow holes of the hollow plunger and the radial holes in the seat and in the case are located at the same level and the spring is mounted between the case stop and the lower end of the circular collar of the hollow plunger.

EFFECT: high reliability of operation of the valve in the process of drilling, excluding spill of flush fluid during lifting the drilling pipe string and filling the internal cavity of pipes during dropping.

2 dwg

Well drilling rig // 2271435

FIELD: mining industry, particularly well drilling with direct or reverse circulation of mud, as well as well repair.

SUBSTANCE: rig comprises double pipe string with annular cavity defined in-between and jet device provided with check valve. The injection device is formed as body connected with inner pipe string. The body is provided with radial channels and annular nozzle set having receiving channels. The receiving channels are aligned with the radial channels to supply compressed air through annular nozzles in annular space at an angle to jet device axis.

EFFECT: increased pulp lifting capacity due to improved efficiency of pulp mixing with compressed air.

4 cl, 1 dwg

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