Device to provide continuous circulation of drilling mud and corresponding plant

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the oil and gas production industry, in particular, to provision of continuous circulation of drilling mud during well drilling. A housing (2) of the circulation device (1) is provided with a central channel (4) designed to receive a portion of a pipe (38); a central channel (4) comprises the upper and lower sealing elements (30, 32); the sealing elements (30, 32) are provided with central holes (33) which, when said sealing elements are expanded (30, 32), can close or be in tight contact with the pipe (38) with inner sealing surface (34) pipe (38). Each of the sealing elements (30, 32) hermetically connected to a packer pipe (8) which is located in the housing (2) for rotation about the central axis (6) of the central channel (4) and is surrounded by a sealing unit (18, 20) closely fitted between the periphery of the packer pipe (8) and the housing (2).

EFFECT: simplified process to provide continuous circulation of drilling mud.

10 cl, 4 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: group of inventions relates to oil and gas industry, in particular to equipment and actions linked with the drilling well. Method includes comparison of the measured pressure in the discharge line with required pressure in the discharge line, and automatic choke control depending on the comparison results, as result difference between measured pressure in the discharge line and required pressure in the discharge line reduces. Pressure control system in discharge line contains controller generating set pressure in annulus based on comparison of the measured pressure in the discharge line with required pressure in the discharge line, and choke automatically controlled depending on specified set pressure in annulus. Well system contains the discharge line connected with drilling string, sensor measuring pressure in the discharge line, and controller generating set pressure in annulus, at least partially based on difference between the measured pressure in the discharge line and required pressure.

EFFECT: increased efficiency of pressure regulation.

20 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is referred to the sphere of drilling, and namely to drill rigs. According to one version the drill rig comprises a drill bit; input drive; system of pumps coupled functionally to the input drive; a compressor; a fluid clutch coupled to the input drive and compressor, at that the compressor design ensures technical capability of unlimited and limited delivery of air in response to the respective clutch position in connected and disconnected positions. The fluid clutch is coupled to input drive by clutch - input drive connection and comprises an end housing of the compressor coupled to the clutch by the coupling box separating compressor from the input drive. At that the fluid clutch is made so that it can change its position from connected position to disconnected one in process of the input drive operation. Hydraulic heat exchange system comprised of a settler and heat exchanger is made so that heat can be delivered from the hydraulic clutch. Heat exchanger is located in close vicinity to the drill rig radiator, which serves for cooling of the heat exchanger by convection of air coming from the radiator. Fluid delivery in the hydraulic heat exchange system is made from the fluid clutch to settler and then to heat exchanger in order to decrease temperature of the fluid and then to the fluid clutch, at that settler is located in direct vicinity to the system of pumps.

EFFECT: ensuring reduced volume of energy consumption by the input drive.

34 cl, 53 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment and may be used to measure parameters of a fluid pumped into a well. The system includes an electromagnetic flow metre, which is equipped with a controller making the base of the first measurement module, a vibration density metre equipped with a controller, making the base of the second measurement module. Modules are built into an injection line of a manifold with controlled medium, with the help of quick-split connections, the second measurement module is connected to the first measurement module, and the second module performs measurement of density, temperature and pressure. Modules are connected to a computer with the help of an information cable and a power supply unit. The computer is installed on a mounting base - all-terrain motor chassis. System supply is carried out from an AC network via a voltage stabiliser or from a board network of a vehicle.

EFFECT: increased universality, mobility, convenience of service, reliability, reduced dimensions.

3 dwg

FIELD: mining.

SUBSTANCE: group of inventions relates to mining and can be used for the fluid flow control in the wellbore. The method comprises providing a hydraulic diode in the channel of hydraulic communication with the wellbore and the displacement of fluid through the hydraulic diode. At that the hydraulic diode is located inside the wellbore. The tool comprises a tubular diode sleeve having a diode opening, a tubular intrachannel sleeve mounted concentrically in the diode sleeve, and the intrachannel sleeve comprises an inner passage which is in hydraulic communication with the diode opening, and a tubular external channel sleeve inside which the diode sleeve is concentrically mounted. Moreover the external channel sleeve comprises an outer channel which is in hydraulic communication with the diode opening. And, in this tool the shape of the diode opening, the position of the inner channel relative to the diode opening and the position of the outer channel relative to the diode opening determine the resistance to the flow of the fluid flowing into the inner channel from the outer channel, and the other resistance to the flow of the fluid flowing into the inner channel from the outer channel.

EFFECT: increase of the efficiency of controlling the fluid flow in the wellbore.

19 cl, 13 dwg

FIELD: mining.

SUBSTANCE: drilling mud is circulated by forcing it through drill string with adapter mounted at the start of horizontal section and including hollow case with radial channels made in said case to 30-60 degrees to its axis. Drill mud flow in said adapter in divided into two parts. One part of said flow is ejected via radial channels as a turbulent flow to force slime particles to the well vertical section while another part is fed as a laminar flow to the well horizontal section.

EFFECT: higher quality of cleanup.

2 dwg

FIELD: mining.

SUBSTANCE: method involves reduction of supplied drilling fluid by means of a pump interconnected with a drill string in a well, outflow of fluid medium from the well to the first auxiliary pipeline connected to a water separating string, covering of a seal around the drill string, downward pumping of fluid medium via the second auxiliary pipeline with velocity chosen to maintain certain pressure in the well and stoppage of drilling fluid flow through the drill string.

EFFECT: improving reliability and simplifying the technology.

4 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves determination of inflow of hydrocarbons into a well bore, determination of reduction of rate of hydrocarbons inflow, switch of control of outlet from a well bore for maintaining selected pressure in the well bore to control of rate of fluid outlet from the well bore to ensure its constant rate, if it drops, return of control of outlet from the well bore for maintaining selected pressure, when inflow of hydrocarbons into the well bore is at the acceptable level.

EFFECT: increased efficiency of drilling through a bed with limited volume of hydrocarbons.

5 cl, 3 dwg

FIELD: mining.

SUBSTANCE: formation method of a well in a coal layer involves drilling of the well mainly having a horizontal shaft in the coal layer using a flushing solution containing liquid, and pressure reduction in a down well so that drilling modes are not higher than balanced ones for drilling, mainly of the horizontal shaft owing to supplying flushing solutions by means of a pump mainly from the horizontal shaft of the well to surface.

EFFECT: drilling in layers with ultralow pressure without any risk of loss of flushing liquid and blockage of the layer.

30 cl, 11 dwg

FIELD: oil and gas production.

SUBSTANCE: present invention aims to create the zone of programmed pressure near bottom-hole assembly with drilling bit by means of sealing installation near bottom-hole assembly, pressure adjustment approximately at the level or insignificantly lower than the threshold pressure of bottom-hole zone surface for provision of influx from the stratum, and adjustment during drilling by means of pumping from bottom-hole assembly or fluid supply restriction into bottom-hole assembly between the zone at programmed pressure and annular space of well bore to prevent overbalance pressure in the zone at programmed pressure, if it is not required for well control.

EFFECT: invention allows combining overbalanced drilling for minimisation of risks usually connected with underbalanced drilling with drilling advantages in the zone of programmed pressure and overbalance.

30 cl, 34 dwg

FIELD: mining.

SUBSTANCE: circulation method of fluid medium in system of wells involves drilling of the first well from surface to underground zone, drilling of the second well from surface to underground zone; at that, the second well crosses the first well at connection point near underground zone, drilling of drain hole from connection point to underground zone by using drill pipes passing through the second well, pumping of drill fluid through drill pipes during drain hole making; at that, drill fluid leaves drill pipes near drill bit of drill pipe, supply of hydraulic fluid downwards via the first well through pipeline; at that, pipeline has hole made at connection point so that fluid leaves the pipeline at connection point and in which fluid mixture is returned upwards via the first well outside the pipeline; at that, fluid mixture includes drill fluid after the latter leaves the drill pipes.

EFFECT: increasing safety of drilling system

56 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to rotary drilling, namely to a pipe string suspension facility. The rotary table is fitted with the pipe string suspension facility and contains the rotary ring installed with a possibility of rotation around the central axis of the rotary table, meanwhile the rotary table is supported by the contact surface located perpendicular to the rotary table central axis. The rotary ring is formed by two or more sections of the ring, each of which is connected with the system containing the bearing housing section implemented with a possibility of rotation with reference to the base section. On the base contact surface of the bearing housing section the bearing housing groove is made. The corresponding base groove is made on the opposite surface of the bearing housing in the base section. The named grooves form curvilinear guide for a rolling body and have the centre of curvature coinciding with the central axis of the rotary table, the rolling diameter of the rolling body exceeds the total depth of the named grooves. In section of the bearing housing the channel is made which connects the ends of the groove of the bearing housing which contains transitional parts, each of which is fitted with a guiding part fitting into a base groove.

EFFECT: improvement of reliability of the device operation is provided.

1 cl, 5 dwg

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