The hinged diverter
(57) Abstract:The invention relates to the drilling of oil and gas wells, namely, controls the trajectory of the drilling wells. The invention consists in that the locking body of the device is made in the form of a slide valve, inside the unit installed managed hydrochory acting on the hollow shaft for changing the direction of drilling, coupled with the hollow spindle shaft has a possibility of deviation from the axis of the housing of the diverter due to the design of the bearings and the spindle is made to rotate in the bearings or ball bearing and bearing standoff on the walls of the well made as installed on the body of the whipstock lower coupling, which profesionaly longitudinal pointed to the top of the slots. The invention provides increased reliability and reducing the cost of drilling operations. 5 Il. The invention relates to the field of drilling oil and gas wells, and particularly to controls the trajectory of the drilling. Known downhole device for guiding shafts drilling wells without descent devices in the drill pipe for guiding diverters on the calculated azimuth: and. C. from 08. This device includes a housing, a hollow shaft, hydrochory, evenly spaced around the circumference of the housing, the valve system flow distribution of fluid on hydroclean containing the shut-off body is made slidable on the ends of the fittings mounted in the sleeve, hydraulic channels connecting each gidrotamir with the cavities of the housing, managing a pendulum suspended on a thin rod to the clutch and associated with the locking body, and the support of the whipstock at the borehole wall. The device meets the requirements of the control borehole trajectory, but limits the rate of recruitment of curvature of the wellbore up to 2-2,5o10 m of drilling in connection with the rigidity of the bottom of the drill string and the limited output of the reference elements of the device. In addition, as shown by the test device. C. N 1661346, when cutting a "window" in a casing for drilling sidetracks after 8-10 hours of work supporting elements hammered metal filings and become unmanageable.The aim of the invention is to increase reliability and reduce the cost of drilling operations.To solve this problem in the hinge whipstock comprising a housing mounted in cor the fluid flow, containing the shut-off body is made slidable on the ends of the fittings mounted in the sleeve, hydraulic channels connecting each gidrotamir with the cavities of the housing, and a control pendulum suspended on a thin rod to the clutch and associated with the locking body, a support standoff on the borehole wall, the locking body in the form of a spool, managed hydrochory mounted inside the housing of the device with the pressure on the hollow shaft for changing the direction of drilling, the hollow shaft is connected to the spindle of the swivel coupling and has the possibility of deviation from the axis of the housing of the diverter due to the design of bearings, and the spindle is made to rotate in samoustraniajutsia and radial-axial bearings or ball bearing and bearing standoff on the walls of the well made as installed on the body of the whipstock lower coupling, which profesionaly longitudinal pointed to the top of the slots.In the present invention, the hinge rotation of the spindle is set at the end of the device with the possibility of kinking the spindle axis relative to the axis of the device at a considerable angle, which will increase the rate of recruitment of curvature stole pipe, that will reduce the likelihood of slip of a router to cut the ledge with increased load from the weight of the drill string. At large skew angles of the axes is possible milling "Windows" without pre-setting cement plugs.The proposed device can be used in the turbine and rotary drilling for posting directional, vertical and horizontal wells, oriented cutting of casing and drilling new shafts in operational and emergency wells.The device illustrated by the drawings, where Fig. 1 shows a longitudinal section of the whipstock of Fig. 2 section a-a in Fig. 1, in Fig. 3-4 position of the working bodies of the whipstock respectively to increase and decrease the angle of inclination of the wellbore of Fig. 5 arrangement of the elements of the mechanism for changing the azimuth direction of the well.The diverter consists of a casing 1 in which is located the hollow shaft 2 connected to the spindle 3 swivel coupler 4 and through sub 5 with a column of drill pipe or shaft of the downhole motor. The spindle 3 through the transmission 6 is connected with a chisel. The hollow shaft 2 together with the spindle 3 rotates inside the housing 1 by bearings 7, 8, is s 14, reinforced solid alloy. The spindle 3 in the sleeve 13 is rotated on the axial-radial bearing 10 and samoustraniajutsia the bearing 11. The inner ring of the bearing 10 fixedly mounted on the spindle 3 between the outer ring and the inner wall of the coupling 13 to the radius there is a gap, resulting in a bearing 10 radially offset on the size of the gap.The rear wall of the clutch 13, which supports the bearing 10 has a spherical shape provides constant contact with the bearing outer ring 10 when the deviation of the spindle 3 from the axis of the housing 1. Thus the bearing 10, taking axial load, allows the spindle 3 to deviate from the axis of the housing by a certain amount with the intersection of their axes in the diametrical center of the self-aligning bearing 11. Depending on the size and structure of the device, the angle of bend can be increased to almost any desired size. At large angles of inflection (up to 10o) that is required when cutting a "window" in a casing, the spindle bearings are mounted in a ball bearing 31, Fig. 3.On the upper end of the hollow shaft 2 has a radial ball bearing 7 and the axial 8, the outer qualcosa the hollow shaft 2 and the housing 1 within the 1owith the intersection of their axes in the center of the bearing 7. To the bottom of the clutch 12 and the screw is fixed to the pipe 15, which forms together with the housing 1 an annular chamber in which the control mechanism trajectory. On the lower end of the pipe 15 from the outside on the thread installed sleeve 16, which is fixed fittings 26. On the sleeve outside diameter mounted rubber seal 17. On the upper end of the pipe 15 from the inner side is set rubber seals 18, sealing the annular gap between the hollow shaft 2 and the inner walls of the pipe 15. The dimensions of the cuff and its elasticity to allow the displacement of the hollow shaft 2 about the axis of the housing 1 2-3 mm, without violating integrity.The hollow shaft 2 drilled holes 19, through which the flushing fluid enters the longitudinal slot 20 in the sleeve 12 and in the annular chamber of the control mechanism, which consists of a circular pendulum 21, suspended on thin rods 22 to the clutch 12. The pendulum 21 is connected with a thin bolts 23 with the annular valve 24. Bolts 23 to freely slide in the holes of the pendulum 21. Springs 25, dressed to the bolts 23 between the pendulum 21 and the spool 24, dampen vibration and provide a pressure valve to the fittings 26. The pendulum 21, tending to the Zenith of feasts 26. Input the holes in the fittings drilled offset from their axes. Eccentricity allows the inlet to get to the inner or outer wall of the annular chamber. The flushing liquid flows through the nozzles 26 in the tube 27 and through them in hydrochory 28, deflecting the spindle 3 in a given direction.From the chambers of the fluid constantly flows through the nozzles 29. The diameter of the holes in the jets 3-4 times less than the bore diameter of the fittings. Due to the difference in pressure loss in fittings and nozzles (15-20 times) hydrocorax supported pressure, providing the necessary force on the hollow shaft 2 and the bit in the borehole wall. In the annular chamber formed by the housing 1 and the pipe 15, the pressure is maintained by pressure loss in the nozzle 30, is screwed into the end of hollow shaft 2.The work of the whipstock as follows. Before lowering the whipstock in the well, depending on the tasks carried out setting the control mechanism: case 1 otsenivaetsya, rises above the sleeve 16.For increasing Zenith angle of inclination of the well bore fittings 26 in their nests turn the input channels to the outer wall of the annular chamber (Fig. 3). Tube 27 directly (the AMI 12 and 13.When the axis deviation of the borehole from the vertical at some angle the pendulum 21 is deflected from the axis of the device to the vertical and moves in the same direction of the spool 24, which opens the inlet for washing liquid to the nozzles 26 from the side of the wellbore inclination. Hydrochory 28 filled with the washing liquid, with a force due to the pressure drop across the nozzles 29 to displace the bearing 9, the bottom of the hollow shaft 2, the sleeve 4 and the upper end of the spindle 3 to the wall of the housing 1. When the spindle 3 is rotated in the diametrical center of the self-aligning bearing 11 in the plane and direction of the curvature of the borehole. With the deepening of the borehole inclination angle of curvature will increase.To reduce the Zenith angle of inclination of the borehole when configuring fittings inlet holes 26 are rotated against the inner wall of the annular chamber (Fig. 4). Channels, as well as in the first case, connected with hidrocharme lying on the same axis (on one line). Managing the pendulum 21, seeking to take a position closer to the vertical, opens the channels on the fittings on the side opposite the direction of curvature of the borehole, and hydrochory 28, pressing the bottom of the hollow shaft 2, and the upper part of the spindle 3 to the wall of the housing, raspolojeny.To change the azimuth of the direction of curvature of the wellbore at a certain angle to the right or left of the actual direction of the wellbore is necessary when setting up a control mechanism to direct the flow of fluid from the nozzles 26 in hydrochory 28 offset to the calculated angle. In Fig. 5 shows the offset spindle direction from the direction of inclination of the well to the right on the 90o. This is ensured by the length and shape of the tubes 27.Against rotation in the well, the device is fixed longitudinal slots 14 on the clutch 13, which is pressed against the borehole wall by the reaction caused by the pressing spindle drill on the opposite wall. Simultaneously, the longitudinal shape of the slots allows you to move the device along the axis of the borehole together with a column of drill pipe at a corresponding pressure. When random tangential slippage of the support elements and housings relative to the walls of the borehole, the control mechanism switches hydrochory 28 in accordance with the setting direction of the spindle 3 with respect to the plane of inclination of the wellbore. The hinged diverter comprising a casing mounted in the housing hollow shaft, evenly spaced around the circumference of the body herotu slip on the ends of the fittings, mounted in the sleeve, hydraulic channels connecting each gidrotamir with the cavities of the housing, and a control pendulum suspended on a thin rod to the clutch and associated with the locking body, a support standoff on the borehole wall, wherein the locking body in the form of a spool, managed hydrochory mounted inside the housing with impact on the hollow shaft for changing the direction of drilling, the hollow shaft is connected to the spindle of the swivel coupling and has the possibility of deviation from the axis of the housing of the diverter due to the design of bearings, and the spindle is made to rotate in samoustraniajutsia and radial-axial bearings or ball bearing and bearing standoff on the walls of the well made as installed on the body of the whipstock lower coupling, which profesionaly longitudinal pointed to the top of the slots.
FIELD: mining industry.
SUBSTANCE: device has two bodies, laced between drilling pipes and rock-destroying element, drilling assembly changing assembly, mounted between bodies. Bodies are placed at a space between each other and interconnected moveably by drill angle changing assembly, made in form of bushing, inside of which a rubber bushing is placed, passing through inner hollows of bodies. Rubber bushing is provided with compacting element and elements for excluding its deformation. Value of space is selected from condition providing for drilling along planned trajectory, providing for exit from slanting portion into horizontal. Elements for excluding deformation of rubber bushing are made in form of steel rings. Fixing elements are made in form of two pairs of coaxial stops in lower and upper bodies respectively at angle of 90° to each other.
EFFECT: higher productiveness.
2 cl, 1 ex, 1 dwg
FIELD: drilling equipment.
SUBSTANCE: device has body, shaft, mounted in body on bearings, drive made in form of hollow spring-loaded rod with outer slits, movement converter made in form of outer bushing with spiral grooves, interacting with response shelves of inner hollow bushing, piston with compaction, spring-loaded ring, provided with slits and toothed half-sleeve. Outer bushing of movement converter is connected to body, and inner one is connected to piston and provided with toothed half-sleeve, interacting with toothed half-sleeve of spring-loaded rod. Rod spring is supported by body via stop ball bearing. Spring-loaded ring, interacting to response half-sleeve of shaft by toothed half-sleeve, is engaged with body by slits.
EFFECT: higher reliability.
FIELD: mining industry.
SUBSTANCE: drilling toll has body with thread and inner washing channel, as well as matrix, contacting pin by its inner surface and having outer end spherical surface, provided with rock-destroying means. Pin in body is mounted coaxially. Outer end spherical surface of matrix with rock-destroying means is made with diameter equal to outer diameter of drilling toll, and inner surface of matrix and outer surface of pin are made spherical, centers of which coincide with center of outer end spherical surface of matrix. Between inner surface of matrix and spherical pin, balls are mounted in recesses of contact surfaces. Recesses for balls made in matrix are elongated in vertical directions from ball center for distance L=(R+r)tgΨ, where R - radius of pin spherical outer surface, m; r - ball radius, m; Ψ - maximally possible angle of matrix rotation in vertical plane, in degrees.
EFFECT: higher reliability.
FIELD: oil and gas industry.
SUBSTANCE: device has body, provided with anchor, lowered on pipes to given depth, having guide and ring-shaped compaction of hydro-drive, and also made with possible displacement inside pipes and body by displacement means, hydraulic engine, passing through compaction, hollow of which is connected to destroying tool hollow, consisting of flexible shaft, provided with destroying head. Device also has tool for destroying casing column and tool for destroying rock, while hydro-drive consists of hollow leading and following shafts, made with possible rotation and longitudinal movement of the latter inside leading shaft until mounting in socket of leading shaft, forming non-pressurized couple cylinder-piston, while torque from leading shaft to following shaft is passed via ratchet gear, body has hydraulic channel, connecting guide hollow to ring-shaped well space, while on the side, opposite to output aperture of guide hydraulic deflector of piston-cylinder type is mounted on it, and in upper portion of body a cylindrical recess is present, made with possible hermetic mounting of leading shaft with rotation, while outside the body an anchor is mounted, being in threaded connection to sub connected to body, and engine is made with possible hermetic mounting in ring-shaped compaction, mounted above recess in body at a distance, lesser than total length of engine and leading shaft, while on the inner surface of body a stop is mounted made with possible interaction with shelves on outer surface of engine body. For making perforation channels in abrasive rocks rock-destroying tool is used, consisting of flexible shaft and chisel. As movement means flexible pipes are used, hollow of which connects to engine hollow.
EFFECT: higher reliability, higher efficiency.
7 cl, 5 dwg
FIELD: oil production, particularly for drilling oil and gas well cluster.
SUBSTANCE: method involves lowering pipe string into casing pipe, wherein pipe string has deflector connected to one end thereof; opening-out casing pipe within the necessary range; alternately lowering flexible tube having nozzle in pipe string up to reaching opened-out casing pipe area under the action of the deflector; supplying high-pressure liquid through flexible tube having nozzle simultaneously with translation thereof for necessary length to form additional well bores; initial removing flexible tube from pipe string and turning pipe string with deflector through necessary angle to obtain required number of additional well bores; final removing flexible pipe with nozzle out of casing pipe. The casing pipe is opened-out over the full diameter thereof within the necessary range and after casing pipe opening deflector is installed in opened area. After additional well bore forming and before pipe string with deflector rotation flexible tube with nozzle is removed from opened-out area of casing pipe.
EFFECT: reduced number of round-trip operations for well cluster forming under the action of liquid head and, as a result, reduced costs.
FIELD: drilling equipment, particularly for directional drilling, namely control devices adapted to control angle and reactive moment.
SUBSTANCE: control device has hollow central member and three hollow tubular noncoaxial members connected to hollow central member. Inner member is disposed in center between the first and the second members. The first and the second members are connected with inner members by threaded connection. The first member is connected to spindle by threaded coupling, the second member is attached to engine body by threaded coupling and central member is connected to inner member by spline. Each of central member and the first member are provided with sectional contact seats located from spindle connection side, wherein a pair of sectional contact seats arranged from either sides of meridional spindle plane in drilling string curvature plane are defined between central and the first members. Sectional contact seats defined between central and the first members are spaced a distance L from the nearest edges of sectional contact seats of central and the first members along central axis of the first member. The distance L is more or equal to spindle diameter D. Angular deviation of the sectional contact seat formed in the first member from meridian spindle plane in drilling string curvature plane is oppositely directed relative reactive drilling bit moment.
EFFECT: increased stability and angle of gerotor engine deflection and increased accuracy of non-uniform well bottom zone penetration.
2 cl, 10 dwg
FIELD: oil and gas well drilling equipment with the use of hydraulic downhole motors.
SUBSTANCE: support-and-centering member is made as metal hub with blades connected to spindle connector. Spindle connector has support cone formed on outer surface thereof and adapted to provide rigid connection with metal hub from inner surface thereof. Support cone of the connector is formed from side of conical thread connecting spindle body with connector. Spindle connector has splines to connect thereof with metal hub. Metal hub is pressed with pressing cone, retaining washer and nut from another side thereof. Metal hub may be installed concentrically or eccentrically to spindle connector axis or outer surface thereof may be differently shaped and arranged eccentrically, concentrically or obliquely with respect to spindle connector axis.
EFFECT: reduced costs of spindle usage.
FIELD: drilling equipment, particularly for deflecting the direction of boreholes.
SUBSTANCE: device includes deflecting wedge with fastening mechanism made as corrugated tube with one sealed end and sub disposed between deflecting wedge and fastening mechanism. Device also has channel to supply fluid into corrugated tube, movable joint between sub and wedge and cutting tool. Device also comprises holding unit for deflecting wedge installed in the sub and made as a piston with rod and fixing means arranged in hydraulic cylinder. Hydraulic cylinder interior communicates with that of corrugated tube. Upper rod part is installed to cooperate with lower part of the wedge from guiding plane side. Channel for flushing fluid supplying is made as hydraulic line connecting drill pipe interior and that of cutting tool with corrugated tube interior, wherein the cutting tool is secured to upper part of deflecting wedge by means of shear bolt.
EFFECT: increased rigidity of deflecting wedge fixation in casing pipe of the well.
3 cl, 2 dwg
FIELD: well construction, particularly to built cluster wells.
SUBSTANCE: method involves lowering pipe string provided with deflector on end thereof in casing pipe; perforating the casing pipe within previously selected interval; performing the following alternating operations including lowering flexible pipe with nozzle in casing string into above perforation area under the action of the deflector, supplying pressurized liquid through flexible pipe with nozzle, translating thereof to form additional well bores having predetermined depths and lifting the flexible pipe after the predetermined number of well bores forming, finally removing the flexible pipe from the casing pipe. Before casing pipe lowering casing pipe is provided with retained guide. The guide includes process case with through orifices and bush. Formed on inner surface of process case are guiding slots and cylindrical recess located in through orifice area. The bush is inserted in the recess to seal through orifices. The bush is restricted from axial downward displacement by rest. During the lowering operation performing through orifices are arranged within above perforation interval and casing pipe is secured, deflector provided with a number of guiding channels and spring-loaded inserts displaces the bush up to the rest and the spring-loaded inserts cooperate with guiding slots to bring outlet orifices of guiding channels in register with through orifices. To obtain demanded number of well bores flexible pipe with nozzle is removed only from pipe string and deflector after each additional well bore creation.
EFFECT: reduced number of trip operations during well construction.
4 dwg, 1 ex
FIELD: oil and gas production industry, particularly multilateral well construction.
SUBSTANCE: method involves lowering pipe string provided with diverter at end thereof; cutting casing pipe within predetermined interval; lowering flexible pipe with nozzle until flexible pipe enters into opened casing pipe zone under the action of the diverter in alternation with supplying pressurized liquid via flexible pipe provided with nozzle; performing translational flexible pipe movement to create additional well bores having necessary lengths along with removing the flexible pipe to create predetermined number of additional bores. Before casing pipe lowering in the well the casing pipe is provided with acid-soluble insert arranged opposite to formation to be opened. Casing pipe cutting is performed around the full perimeter thereof for necessary length within predetermined opening interval by solving the acid-soluble insert during acid supplying through pipe string into above predetermined interval. After that the diverter having several diverting channel is installed in the interval. After each additional well bore forming flexible string with nozzle is removed only from the pipe string and diverter to create predetermined number of additional bores. After that the flexible pipe with nozzle is finally removed from the casing pipe.
EFFECT: reduced number of trips.