Device of preliminary load and centering for milling underground barrier valves

FIELD: metallurgy.

SUBSTANCE: group of inventions relates to milling. Assembly for a tool operation on a device in an underground location on the bearing column includes a tool fixed on the column; a shoe joint carried by the column, arranged able to move relative to the tool; a displacing unit actuated by a relative displacement between the tool and the shoe joint. Relative axial displacement is ended, when the tool and the shoe joint are in separate locations on the device in the underground location to apply a preset force of preliminary load on the tool to the device when actuating the tool against the device and axially relative to the shoe joint, herewith the shoe joint is still retained by the device.

EFFECT: provided is retention of the milling cutter on the trajectory and acceleration of milling.

20 cl, 3 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: 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: 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.

Drilling rig // 2541972

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to drill rigs with movable rotary mechanism used for drilling of expendable wells. The drill rig includes mast, chain hoist for the string with movable rotary mechanism equipped with hydraulic chuck to retain drill pipes, chain hoist for drill pipe stands with elevator mounted above the chain hoist for the string and equipped with hydraulic chuck to retain drill pipe stands consisting of one or several pipes, carousel arrangement with circumferential cells for drill pipe stands, at that the above arrangement may be moved from the well axis and back, and stationary hydraulic pipe holder. Over chain hoist for the string with movable rotary mechanism there is identical chain hoist with movable straight-way making-up pipe holder coupled kinematically to the above one through two pairs of drive gear and having common reversible drive with it, in result when movable rotary mechanism moves upwards the making-up pipe holder moves downwards and vice a versa, a drill pipe stand pipe disconnected and connected to the string is taken by its upper end by hydraulic chuck of the elevator of chain hoist for drill pipe stands with elevator and removed from the carousel arrangement or accumulated in it with potential automation and synchronisation of operation for all elements the drill rig and alignment in time of working and idling operations for running in and out of drilling string and drill pipe stands as well delivery of the latter from the string to accumulation site and back. The drill rig provides drilling of wells with bore inclination at angle of 45-90 to the horizon.

EFFECT: sufficient reduction in duration of auxiliary operations of the drilling string run in and out is ensured due to their alignment in time.

4 cl, 4 dwg, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention is related to drilling, and namely to water extraction from bore wells using the well drilling device by percussion rotary drilling. The well drilling device by percussion rotary drilling comprises a chisel weight magnifier installed directly over the chisel - above-chisel bit weighting material - fixed to the drill stem and the chisel bit by means of adaptors. The chisel weight magnifier is made as a section of casing pipe, which can be installed at the drill pipe thrusted to the adaptor that connects the drill pipe with a chisel bit at the one side and connection by the adaptor with the drill string at the other side, at that the casing pipe section is centred in regard to the drill pipe by means of protective couplings while the space between these pipes is filled with lead pellet.

EFFECT: improved efficiency of well drilling due to increased rate of drilling.

2 dwg

FIELD: mining.

SUBSTANCE: device includes a drilling bit weight enlarging mechanism installed immediately above the drilling bit - an above-bit weighting device - and attached to a drill string and to the bit by means of adapters. The bit weight enlarging mechanism is made in the form of a piece of a casing pipe that can be installed on a drill pipe so that it is borne against an adapter attaching the drill pipe to the bit on one side and connected by means of the adapter to the drill string on the other side; with that, a piece of the casing pipe is aligned relative to the drill pipe by means of safety couplings, and space between these pipes is filled with lead shots and electrorheological liquid and equipped with an electric field creation device increasing viscosity of electrorheological liquid when striking on the bit.

EFFECT: improving well drilling efficiency due to increase of driving speed.

2 dwg

FIELD: mining.

SUBSTANCE: drilling tool comprises a drill bit (2) connected to the drill rod (1) by a connector (3) of the drill bit. The drill rod is made of sections (11) of the drill rod. Each section of the drill rod comprises an inner section (111) of the rod and a hollow outer section (112) of the rod. The inner section of the rod is fixed with the ability of rotation in the outer rod section. The inner rod sections are joined together and form the inner rod (11') of the drill rod. The outer rod sections are connected together and form the outer rod (12') of the drill rod. The inner rod is connected to the output shaft of the power unit, and the outer rod is rigidly connected to the housing of the power unit.

EFFECT: reduction of friction force between the drill rod and the borehole wall.

14 cl, 7 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to drilling. Method of drilling the inclined and horizontal wells in highly porous rocks comprises generation of pressure difference in well-formation system by changing the flushing fluid density. To increase drilling rate by differential use of pressure difference range, additional pressure difference is created by increasing flushing fluid density.

EFFECT: higher rate of drilling.

4 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: at construction of production well, vertical shaft is drilled through rocks, including unstable mud shale, with entry into productive seam, going-in of production string to productive seam, cementing of annular space and drilling the shaft from production string into productive seam. At exposure of horizon with unstable mud shale, mechanical drilling rate is set not over 6 m/h for drilling with increased flushing fluid flow rate of about of 30-40 l/s using drilling solutions with density of 1.12-1.40 g/cm3. After well shaft drilling, drilling assembly performs cleanup job over well shaft with working of the shaft by rotary machine at rotor rpm of 40-100 rpm. Drilling fluid mixed with fibres in amount of 6-15 m3 is forced through the shaft and drill assembly reciprocates over the length of drive pipe. For well shaft casing operation string is lowered section-by-section. First 400-1000 m long section is lowered to well bottom on drill tool and annular space if cemented in interval from bottom to first section head. Cement is cured to lower production string second section. Sections are coupled, annular space is cemented and cement is cured. Production string is sealed.

EFFECT: ruled out sticking of drill tool in drilling unstable mud shale.

2 cl, 3 ex

FIELD: oil and gas industry.

SUBSTANCE: method includes isolation of some well sections, and monitoring of their inflow. Preliminary place of the problem section is determined, and device is run in the well, at least closing zone of the problem section inside the first completion. The device contains isolating elements located above and/or below the problem section, elements of second completion and suspension. The isolating elements and suspension contain sealing devices, isolating along the internal surface of the well string.

EFFECT: increased efficiency of elimination of the problem sections upon simultaneous decreasing of the time expenses.

13 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: device includes a frame with a table, a rotation drive and two cutting tool supply mechanisms. The frame is made in the form of a fixed annular housing, includes four supports inside it from below in four radial bores of the housing and its rectangular vertical recesses located along the perimeter of the central hole of the housing and coaxially to its bores; the above four supports are made as mating parts to the bores and recesses of the housing and provided with adjustment screws, prismatic stops with cross-shaped corrugations on the working surfaces and spacers providing attachment of the device for cutting pipes of different diameters. From above the frame there located is a table rotating on rollers arranged on rolling bearings of eccentric axes of the frame and made as an integral part of a gear rim of an external gear connection. The frame and the table are detachable and have a possibility of disconnection and connection of their halves at alignment of the division plane of the table with the division plane of the frame with fixation of their combined position. Each of the two mechanisms for supply of the cutting tool is provided with two types of slides and holders with cutter inserts.

EFFECT: reducing overall dimensions and weight of the device; enlarging technological capabilities.

6 cl, 17 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: electrochemical cell is created with anode making the section of pipe to be destructed and cathode making the tubular structure located opposite the destruction point. Electrolyte is fed to pipe wall and forced continuously from the surface over flow string via active zone, that is, annulus between section to be destructed and tubular cathode. Voltage is fed to cause electrochemical anode dissolution of pipe section. This process is realised with the help of two or more electrochemical cells. One or more cells are used for destruction of pipe section or sections. Another part is used to generate supply voltage for induction of electric current and composed of galvanic elements arranged as close as possible to the zone of galvanic cell soluble section.

EFFECT: reduced power losses, simplified production and operation.

2 cl, 3 dwg

FIELD: mining.

SUBSTANCE: device comprises a pipe cutter housing with a slot, where on the pin a cutter is mounted. Cutter moving unit is implemented as a bottom hydraulic cylinder, where a power piston with a plunger is installed, on the bottom end of which a tip with cone attachment, supported by spring-loaded cutter is installed. The bottom hydraulic cylinder is connected through the top end with the spear housing, in the openings of which the dies are mounted. The spear housing is connected through the top end with the upper hydraulic cylinder and is fitted with an expanding cone. The upper hydraulic cylinder comprises a ring piston with hollow stem connected with expanding cone of the spear, enclosed by dies. The top end of the hollow plunger forms movable connection with the expanding cone, which forms with the spear housing a cavity, hydraulically connected through a circulating hole in the hollow step body with its axial channel. The circulating hole in the initial position is shut with shutter with a sitting bevel fitted to a ball valve. The upper hydraulic cylinder of the device through a sleeve and sub is connected to a drilling string. The cutter is supported by a spring-loaded thruster in a bore of the pipe cutter housing, on external side of which a bearing box with a protective bush is installed.

EFFECT: improvement of reliability, expansion of technical capabilities.

3 cl, 3 dwg

FIELD: mining.

SUBSTANCE: device comprises a housing with a grooves, the pull-out cutters hingedly attached in the grooves of the housing, radial channels formed in the housing in the plane of pulling-out of the cutters and directed into the cutting zone, at that the cutters are made with the ability to fix them in the pulled-out and the transport positions, the hydraulic drive capable of interacting with the surface of the cutters in the plane of their cutting edge. The drive is made in the form of a hollow piston spring-loaded from the housing with the shoulder and ends with a wedge surface, the latter has a cutout for the bearing surface of the cutters. The drive is placed in an annular cavity made in the housing above the pull-out cutters. The hollow piston is equipped with a fitting. In the housing above the drive three radial channels are made, tightly overlapped by the hollow sleeve, fixed relative to the housing by the breakable screw. Below the hollow sleeve in the housing the inner annular groove is made, in which the stopping split ring is located. On the top the hollow sleeve is provided with a plug catching baffle for the ball thrown from the wellhead. The hollow sleeve is made with the ability to move axially downwards under the action of the excess hydraulic pressure in the device cavity and fixing by the stopping split ring the upper end after its interaction with the stopper.

EFFECT: increased reliability and service life.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: tool includes a case with a spring-loaded piston equipped with a fluid passage for operating fluid delivery, a grove with a hinged tool holder fixed at the pin, a locking mechanism made as the upper sleeve bearing of the lower ball bearing equipped with a cover shell. The outside diameter of the sleeve bearing and cover shell of the ball bearing is bigger than the outside diameter of the case. The piston is equipped with a pusher passing in its axial channel and containing a grove with the upper and lower bevels. The tool holder has a protrusion and it is installed so that it can be placed in the matching groove of the pusher. The case is equipped with a cage fixed to it rigidly, and in the cage axial channel there is a cup supported by the pusher butt end.

EFFECT: increase in reliability and operational efficiency, extension of scope of application.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: device includes a hollow adapter, a hollow housing, a hollow shaft, an anchoring assembly including a spring-loaded ram holder arranged in the middle part, provided with longitudinal inclined slots and three rams on the surface, three friction rams with a group of screw cylindrical springs, and a wedge device. An external housing of the adapter is made in the form of a cylinder with a cross section. An internal housing - a cylinder having outside diametre for inside diametre of the external housing. Rams are installed in openings of the housing and the ram holder and provided with teeth in the form of polyhedrons on front surface. The ram holder is made in the form of a straight hollow cylinder, through longitudinal slots - openings for rams are made in the centre of this cylinder. Cutters are arranged in the cutter holder and consist of a working cutting part and a shank in the form of an asymmetric rhomb. The cutter holder is made in the form of a straight cylinder with longitudinal slots throughout the cylinder length; spring-loaded cutters are arranged in three of them, and H-shaped tie rods are arranged in the other three of them. Below the cutter holder a shaped sleeve has a wedge part contacting with its inclined surface to the cutter. In the middle part there arranged in a detachable housing-sleeve is an assembly with two sliding bearings. The lower end part of the external housing of the adapter is T-shaped. The hollow shaft has radial through holes in the lower part.

EFFECT: improving reliability, processibility and maintainability.

9 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed device comprises cylindrical casing made of dielectric material with tapered inner bottom part. Casing end has circular conical ledge 4. Resilient lugs 6 of cathode are secured to said ledge, said cathode being shaped to truncated cone and composed by thin resilient trapezoidal plates. Wide end of said plates is secured at conical ledge while narrow ends are bent off from casing axis and assembled inside resilient split ring and lap ring-electrode 7. Tow ring bolts 8 are arranged at casing top end for connection to transport system while union 10 is arranged thereat for connection to electrolyte feed system. Four holes 5 in casing wall are made above conical ledge 4 to allow electrolyte to flow from casing inside. Electrolyte feed and DC current source switched on cause electric current the circuit: DC current source "plus", casing string 2, cut pipe 1, electrode system-cathode, electrode gap, conductor 12, DC source "minus". Note here that anodic dissolution of cut pipe wall metal occurs in circle opposite the -cathode 7.

EFFECT: higher reliability, lower applied forces.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry. The device includes housing (5) of cylindrical form made of dielectric in which two axially symmetric dead holes are made. Bottom of the upper hole is the bottom of cavity (9) for electrolyte. In the upper part of this cavity, at inner surface, there is thread with metal cover (13) screwed in it. At inner face of the cover (13) there is membrane (17) dividing the cavity into two - the upper cavity (16) over the membrane connected with inner cavity of production string (20) and providing connection to handling system and the lower cavity (9) for electrolyte located under the membrane. Inside this cavity there is an electric pump (8) connected to inner cavity of metallic tool-electrode (1) having cylindrical form. By its upper face with crew (4) it is screwed into the housing (5) and its lower face thickened at wall has dielectric pads (21). Tool-electrode (1) is connected to negative terminal of direct-current source located at day surface. Cut object being an electrode is connected to positive terminal of the same source through production string (20) that touches the cut object (19).

EFFECT: achieving high reliability in division into parts of fallen objects having different form and dimensions.

1 dwg

FIELD: mining.

SUBSTANCE: device comprises a body with a central passage channel, in which a hollow valve seat is placed with overflow channels, connected to the body with the help of a temporary breakable joint with the possibility of fixation in the working upper position with the help of a spring fixator and tight closure of overflow channels. The body is connected by thread with the bottom of the shaped shutter, is equipped on the top with a head for a crowfoot and holes displaced in radial direction, communicated with the central channel, and also upper end ledges for unfolding. In the body below the holes of the body there is a ledge installed as coaxial with the valve seat, made as capable of tight insertion into the seat cavity in the working position to close overflow channels.

EFFECT: increased reliability, expanded process capabilities.

2 dwg

Well pipe cutter // 2255201

FIELD: oil and gas industry.

SUBSTANCE: device has body with radial ports, cutting assembly and drive. Cutting assembly has three disk cutters, evenly positioned around circle of body with possible rotation together with pipes column. Cutters are made with back teeth and square-shaped profile axes, set vertically in square side grooves of wedge casings. Drive has upper and lower spring-loaded wedge-shaped pistons. Pistons are made with possible movement towards each other and contact with wedge casings. Pipe cutter is connected to pipes column.

EFFECT: higher reliability, higher efficiency.

2 cl, 2 dwg

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