The layout for the window cutting in the production string
(57) Abstract:The invention relates to techniques for drilling, namely the recovery of idle or marginal wells by drilling of additional barrels of production casing. The invention consists in that the device for fastening the start of a router on the wedge-diverter is made in the form of a circuit breaker placed in the holes of the starting a router and guide stopper chute whipstock, and the push rod anchor whipstock is located inside the past and has a tapered surface for engagement with a sliding dies, while the push rod is made with emphasis on the face. The invention provides a fast and reliable disconnection of the starting a router with a wedge-diverter. 1 Il. The invention relates to techniques for drilling, namely the recovery of idle or marginal wells by drilling of additional barrels of production casing.Recovery wells by drilling of additional barrels of operational colon economically justified and finds more widespread in oil and gas producing areas Rossi who omonovca to cut a window in the production string type MOD includes a set of mill-reamer and the whipstock (Miraliev S. B. and technology sidetracking wells. M., Nedra, 1967, S. 42-56).The disadvantage of this layout is that the slope and installing a whipstock is made to drain the wedge connected to the wedge-whipstock by means of two bolt connections for cutting which requires additional effort, which may cause damage to the drill pipe, the weight of which creates the necessary load.In addition, the disadvantage is that you need to make an extra trip to pick up the sling wedge and pull the starter mill to cut the window.A known arrangement for cutting a window in the production string, which includes the initial mill and whipstock containing the anchor with a pusher, sliding dice and slide guide stopper that is fixed by bolt connection associated with the starting mill. The bolt is placed in the holes of the starting a router and guide stopper chute whipstock (U.S. patent 5341873 published 30.08.94,, N. CL 166/117.5).The anchor is a hollow cylinder, inside of which is and created the weight of the drilling tool. Pusher, moving up inside the anchor, makes dies on inclined protrusions to contact and traction with the wall of the production string.The disadvantage of the above arrangement is the possibility of breakage of the drill pipe, through which the force for removal of the bolted connection that secures the starter mill with guide stopper chute whipstock.Another drawback is the possibility of rotation of the whipstock around the axis of the bore in the unreliable mounting plates anchor whipstock with the wall of the production casing, which is also due to the strength characteristics of drill pipes, the weight of which creates a load on the plunger anchor whipstock.The present invention is fast, reliable disconnection of the starting a router with a wedge-whipstock and reliable fastening of the anchor whipstock with the wall of the production string.The solution of this problem is achieved by the fact that in the known arrangement for cutting a window in the production string, which includes the initial mill and whipstock, as the RA and guide stopper chute whipstock, contains an anchor with a pusher and a pull-out dies, according to the invention, the device for fastening made in the form of an isolator placed in the holes of the starting a router and guide stopper chute whipstock, and the push rod is located inside the anchor whipstock and has a tapered surface for engagement with a sliding dies, while the push rod is made with emphasis on the borehole bottom.NC represents, for example, plunger couple or other separation device located in the holes of the starting a router and guide stopper chute whipstock. The guide stopper is a body breaker. The circuit breaker is triggered when creating a differential pressure of drilling fluid in the hydraulic system proposed layout and produces a fast and reliable separation of the starting mill from the whipstock.Mounted anchor whipstock is achieved by the fact that the outer working surface of the plunger armature is made conical, as in the case of anchors placed hole die (crackers). Under the influence of the load, the weight of the drilling tool, the plunger into the will idigam die through holes to contact and traction with the wall of the production string.The starting mill is progolosuju structure having a hollow channel for pumping drilling fluid, the thread for connection with the drill, tubing or downhole motor and carbide cutting edges, employees working bodies for cutting the wall of the production string.The whipstock includes a cone-shaped groove of the guide stopper and anchor, is a hollow cylinder within which progressively moves the tapered plunger having a cylindrical stem, resting the bottom on the bottom of a well.The chute and the anchor are connected, for example, threaded, grooved or swivel.The layout for the window cutting in the production string shown on the accompanying drawing.The layout for the window cutting in the production string includes: starter mill 1, screw on the pipe or shaft of the downhole motor (not shown) and connected through the circuit breaker 2 with wedge-diverter 3.NC 2 accommodated in the housing and is at the same time the guide stopper whipstock 3.Whipstock 3 includes indecency hollow body 7 with holes 8 for cylindrical pointed die 9, held in the depressed condition of the springs 10 to the conical surface of the plunger 11, which is a one or two step truncated cone, having in the lower part of the cylindrical rod 12. Die 9 tapered surfaces of the pusher 11 extended through the openings 8 to contact and introduction of the pointed ends in the wall of the casing 13 when the stop rod 12 to the bottom 14.The layout for the window cutting in the production string is as follows. The layout down to the bottom 14 of the well (roof cement bridge or straddle packer - not shown) and is fixed in a given direction under the weight of the drill or other tool (not shown). Includes pump (not shown) and the pressure of the flushing fluid actuates the circuit breaker 2, separates the start of a router 1 from the whipstock 3. When the rotor or the rotating shaft of the downhole motor (not shown) is served starting 1 mill down the body of the circuit breaker 2 trough 4 whipstock 3 to contact and introduction of the working surfaces of the start of a router 1 with the wall of the casing 13. Is life ledge and cutting Windows in the walls EMA layout for the window cutting in the production string budget, simple in manufacture and operation, has a rapid and reliable separation of the starting mill from the whipstock without the application of additional load, more reliable fastening anchor whipstock in the wellbore casing, prevents rotation of the whipstock and the likelihood of breakage of the drill pipe or other tool, through which you are loading the layout. The layout for the window cutting in the production string, which includes the initial mill and whipstock are rigidly connected together by a device for fastening placed in the holes of the starting a router and guide stopper chute whipstock containing the anchor with a pusher and a pull-out dies, characterized in that the device for fastening made in the form of an isolator placed in the holes of the starting a router and guide stopper chute whipstock, and the push rod is located inside the anchor whipstock and has a tapered surface for engagement with a sliding dies, while the push rod is made with emphasis on the face.
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.