The diverter

 

(57) Abstract:

The invention relates to drilling equipment and is intended for changing the direction of the borehole when drilling downhole motor. The invention consists in that the whipstock in the well-known directional drilling of wells containing prefabricated housing, cylinder, placed in it a piston with a hollow stem and executed on the rod straight and helical slots, the recoil piston, oil filled hermetically sealed cavity, a rotary spindle, kinematically associated with helical teeth on the hollow piston rod, the kinematic connection of the rotary spindle with screw slots of the hollow piston rod carried swivel clip, made in the form of a rotor with an inner crown screw slot and dogs swivel clip, made with the possibility of interaction with the ratchet crown on the rotary spindle and a stationary yoke without the slot, the pawl which is arranged to interact with the same ratchet crown on the rotary spindle, the latter is connected with the angular sub made with the possibility of deviation of the instrument. The invention allows to enhance the technical and HC for a drilling technique and is intended for changing the direction of the wellbore while drilling downhole motor.

Known is closest in design to the whipstock directional drilling of wells, comprising a housing, a cylinder, a piston with a hollow stem and made it straight and helical slots, interconnected at the ends, a return spring of the piston, oil sealed cavity, a rotary spindle, kinematically linked arms with straight and helical slots (RF patent 2015287, CL MCI 5 E 21 7/08).

A significant drawback of this diverter are:

- the difficulty of placing a large number of levers and a slot around the circumference of the device that does not reduce the rotation step, resulting in straight and helical slots along the length is not posted, it reduces the technological capabilities;

it is practically impossible to perform under this scheme, the diverter diameter less than 100 mm, the levers out tiny and do not provide the strength;

it is impossible to change the course, and therefore the rotation angle in the finished design, closed slots do not allow this.

An object of the invention is the expansion of technological capabilities of the finished design of the diverter and increase the durability of the small diametral size.

In the proposed diverter lack of communication between helical and straight slots allows them to spread along the length of the different crowns, thereby increasing their number, i.e., to have a greater choice of step. In addition, by adjusting interchangeable alimentacion dogs. Extra set of dogs allows for a small number of teeth of the ratchet to reduce the angle of rotation of the spindle and to increase the size of the tooth. The larger the tooth, the greater its strength. In combination with a power circuit dogs on the outer cylindrical surface carried this greatly increases its efficiency and durability.

Thus, the claimed diversion meets the criteria of the invention of "novelty" and "inventive step".

In Fig.1 shows a longitudinal section of the whipstock.

In Fig.2 shows a cross section along a-a swivel clip dogs.

In Fig.3 shows a cross section along b-B of the fixed casing dogs.

The diverter directional drilling of wells contains prefabricated housing 1 consisting of an upper section 2, middle 3 and bottom 4, a cylinder 5, a piston 6 with the hollow shaft 7, on which cut straight slots 8 and the screw slots 9, the return spring 10, oil filled hermetically sealed cavity 11, separated by a piston 6 on the upper and lower parts, the rotary spindle 12, the rotary yoke 13, a fixed yoke 14. Oil filled hermetically sealed cavity 11 formed of glass 15 recorded flood clavioline box 21, in the bearing 19 is a window 22 in the lower section 4 - window 23. Straight slots 8 interact with the splines of the sleeve 24, is fixed with a screw 25. Turning the yoke 13 made in the form of a rotor and provided with a shank in the form of a Cup 26, which is cut narrow crown screw slot 27, and the boxes are placed on the axes 28 of the pawl 29 and an extra set of 30 dogs. Dogs are biased by springs 31, which is closed by the cover 32. Coaxially with the axis 28 is made the head of the dog to the diameter D, the axle 28 has the flats and into the hole doggie planted with a gap of 0.4. ..0,5 mm Fixed ferrule 14 is fixed by a screw 33 and is different from the rotatable only in the absence of the shank of the Cup 26. The rotary spindle 12 is equipped with a crown 34 hrapovic teeth interact with dogs clips. The rotary spindle mounted in the bearing 19 and axially fixed thrust ball bearings 35 and 36, the nut 37 and inserts 38, from hrapovic teeth replaceable ring 39 of the regulation of the stroke of the piston. On the threaded end of the rotary spindle mounted angular sub 40 with the possibility of deviation of the instrument.

The diverter works as follows.

When the flow of drilling mud through the Windows 21 and he gets p is wratney the spring 10, moving down to lock it in a removable ring 39. Straight slots 8 and the sleeve 24 does not allow the piston to rotate around the axis. Screw slots 9, interacting with crown screw slot 27 swivel clip 13 will rotate the ring clockwise step, which will be determined by the number of teeth of the ratchet crown 34 and the stroke length of the piston L. Oil in a sealed cavity 11 will inflate the rubber sleeve 18, the mortar between it and the lower section 4 will be squeezed out through the vent window 23. When turning on step dog fixed clip fall into the tooth ratchets crown. When the supply of drilling fluid, the piston will go up, turning the yoke will take its original angular position, and the rotary spindle 12 will remain in the rotated one step position to return it to its original position will not allow the dog fixed clip. The spindle is connected with the angular sub 40 made with the possibility of rotation of the tool.

By repeating the cycle, the spindle will turn on the next step and so as much as you want.

The angle of the slot and the length of stroke of the piston L can be chosen so that only the replacement of replaceable rings 39 can change the angle of rotation, for example, 2 times.

In the proposed primerica execution allows you to set the angle of rotation of the spindle 20onote that without additional set of dogs turning on the angle you will need 18 teeth, but the teeth will be small, and therefore, their strength is low.

Power circuit dogs 29 passes through line 41 in the window clips in place 42 and tooth ratchets crown 34 in place 43. The head of the dog is made with a diameter D, the Windows of the clips under the heads of the dogs made the return bore diameter D in alignment with the axis 28, resulting from the presence of a gap in the axis 28 of the load will be divided by the diameter D, the axle 28 is fully unloaded.

The existence of a power circuit on the outer diameter surface of the pawl, the possibility of using a large tooth can improve the strength characteristics, the ability to change the stroke length of the piston and rotation of the spindle distinguishes the proposed diversion from the prototype and can significantly reduce the diametrical dimensions ceteris paribus.

The diverter directional drilling of wells containing prefabricated housing, cylinder, placed in it a piston with a hollow stem and executed on the rod straight and helical slots, the recoil piston, oil filled hermetically sealed cavity, the rotation of animationsa communication rotatable spindle with screw slots of the hollow piston rod carried swivel clip, made in the form of a rotor with an inner crown screw slot and dogs swivel clip made with the possibility of interaction with rapovymi crown on the rotary spindle and a stationary yoke without the slot, the pawl which is arranged to interact with the same ratchet crown on the rotary spindle, the latter is connected with the angular sub made with the possibility of deviation of the instrument.

 

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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.

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2 cl, 1 ex, 1 dwg

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EFFECT: higher reliability.

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Drilling tool // 2246603

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7 cl, 5 dwg

FIELD: oil production, particularly for drilling oil and gas well cluster.

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EFFECT: reduced number of round-trip operations for well cluster forming under the action of liquid head and, as a result, reduced costs.

1 dwg

FIELD: drilling equipment, particularly for directional drilling, namely control devices adapted to control angle and reactive moment.

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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.

5 dwg

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.

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