CN211524747U - Windowing whipstock for anchoring diameter-variable riser - Google Patents

Abstract

The utility model discloses a variable water proof pipe of anchor diameter whipstock of windowing, including last window seeker, inclined plane backup pad, ramp body, lower window uide bushing, ramp body joint, go up reducing slip cover, go up reducing slips, rubber circle, go up the cone, go up slips, lower cone, lower reducing slip cover, the diameter-changing slips down, ramp body most advanced threaded connection and welding go up the window seeker, go up window seeker lower extreme and at ramp body back threaded connection and weld the inclined plane backup pad, ramp body joint threaded connection and welding lower window uide bushing, go up slips and lower slips and weld upper reducing slip cover and lower reducing slip cover, this variable water proof pipe of anchor diameter whipstock of windowing can realize that the whipstock instrument of a size model is used for the water proof pipe of multiple sizes to open the window, can show improvement tool machining manufacturing efficiency, the cost is reduced.

Description

Windowing whipstock for anchoring diameter-variable riser

Technical Field

The utility model relates to an oil gas well pit shaft sidetracking instrument technical field that windows especially relates to a variable water proof pipe whipstock that windows of anchoring diameter.

Background

The ocean oil and gas development mainly adopts a combination mode of cluster well groups and directional wells, well mouths are densely arranged, a water-resisting guide pipe is used as a holding structure of the well mouths, and the water-resisting guide pipe is arranged from a drilling platform to a seabed shallow layer and has the main function of isolating seawater to form a drilling fluid circulation channel. When the riser pipe is used for piling, the hammer rejection deformation is often generated due to the pile group effect, the riser pipe with slight deformation is usually repaired in a direct milling mode, and the riser pipe with serious deformation or collision with the track of the adjacent riser pipe is repaired in a feasible and effective mode by adopting windowing sidetrack drilling.

The technical principle commonly adopted for windowing the large-size riser is as follows: the method comprises the steps of anchoring an inclined plane body on the inner wall of a marine riser according to the designed depth and direction by adopting an axial anchoring device and a radial anchoring device, then milling a pipe column by adopting a hard alloy cone drill bit, wherein the drill bit penetrates through the pipe wall to form a well hole under the guidance of the inclined plane body, the anchoring unit is divided into radial anchoring and axial anchoring to limit the rotation and the movement of the inclined plane body, radial and axial anchoring slips are provided with conical inclined planes except for tooth form difference, in addition, other structures are the same, a cone-shaped piston is pushed by hydraulic force to extrude the anchoring slips to bite into the pipe wall, then a cone is locked by a stopping pipe, and then the. At present, to the riser windowing of 20 ", 24", 30 ", the riser instrument that can only adopt a specific model size to the riser of a size can only adopt the whipstock instrument, because whipstock instrument spare part size is huge, the structure is complicated, the prepare material of each model instrument, processing, the equipment degree of difficulty is big, the process cycle length, instrument preparation time accounts for than high in implementing the whole time cycle in-process of riser windowing, to technical service company, if prepare simultaneously the whipstock instrument of multiple model, the inevitable inefficiency on technical development, management and manufacturing to occupation cost is too high, also do not benefit to simultaneously and improve instrument preparation efficiency.

Disclosure of Invention

To the above problem, the utility model provides a variable water proof pipe windowing whipstock of anchoring diameter through increasing or changing specific structure, can make the whipstock instrument of a size model be used for the water proof pipe windowing of multiple size, to the rare instrument of this kind of market demand of water proof pipe windowing instrument, can show improvement tool machining manufacturing efficiency, reduce the comprehensive cost.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a variable water proof pipe of anchoring diameter whipstock of windowing, includes window seeker, inclined plane backup pad, inclined plane body, window uide bushing down, inclined plane body joint, goes up reducing slips cover, goes up the variable diameter slips, rubber circle, goes up the cone, goes up slips, slips under, cone, lower reducing slips cover, the variable diameter slips down, inclined plane body joint, go up the cone, go up slips, slips under and cone down, inclined plane body most advanced threaded connection welds window seeker concurrently, go up window seeker lower extreme and weld the inclined plane backup pad concurrently at inclined plane body back threaded connection, inclined plane body joint both welds window uide bushing down, go up slips and slips down weld upper reducing slips cover and lower reducing slips cover.

The utility model provides a go up window seeker is ring cover form clinohedral, and the pointed end is the great drill bit guide face of angle, with the drill bit guide face link up be with the axis become the well orbit guide face of certain angle, be the bolt hole at entity lateral wall intermediate position, at bolt hole both sides symmetric distribution welding hole.

The utility model provides a lower window uide bushing is the ring box body for the window lower extreme passes through, increases the smoothness degree, and the cover lateral wall has one to become the inclined plane of certain angle with the axis, is well orbit guide face, in the mantle wall of guide face both sides, symmetrical arrangement welds hole, bolt hole and breather hole in proper order.

The utility model provides an go up reducing slip cover and become diameter slips structure down the same, set body one end inner wall has a spacing step, a plurality of slip grooves that run through the cover body wall of radial equipartition in the middle of the cover body, the welded hole that the equipartition runs through between the slip groove, and cover body main aspects and spacing step inboard have a rubber circle recess for place the rubber circle and guarantee that the cover body is placed between two parties, the outer arris limit chamfer in cover body both ends is used for preventing to cut and rub.

The utility model has the advantages that: by adding or replacing specific structural parts, the whipstock tool with one size and model can be used for windowing riser pipes with various sizes, the efficiency of the whipstock tool in the processes of technical development, management and processing and manufacturing can be greatly improved, and the comprehensive cost of tool development is reduced.

Drawings

FIG. 1 is a side cross-sectional structural view of a windowing whipstock for an anchoring diameter variable riser;

FIG. 2 is a block diagram of the upper window seeker of FIG. 1;

FIG. 3 is a view of the lower window guide sleeve of FIG. 1;

FIG. 4 is a structural view of the upper reducing slip sleeve of FIG. 1.

In the drawing, 1, a riser pipe, 2, an upper window guide head, 3, an inclined plane support plate, 4, an inclined plane body, 5, a lower window guide sleeve, 6, an inclined plane body joint, 7, an upper reducing slip sleeve, 8, an upper variable diameter slip, 9, a rubber ring, 10, an upper cone, 11, an upper slip sleeve, 12, a lower slip sleeve, 13, a lower cone, 14, a lower reducing slip sleeve, 15, a lower variable diameter slip, 201, a drill guide surface, 202, a borehole trajectory guide surface, 203, a bolt hole I, 204, a welding hole I, 501, a trajectory guide surface, 502, a welding hole II, a bolt hole, 504, a breathing hole, 901, a large rubber ring groove, 902, a slip groove, 903, a welding hole, 904 and a small rubber ring groove are shown in the drawing.

Detailed Description

The present invention will be further described with reference to fig. 1.

In fig. 1, an anchoring diameter variable riser windowing whipstock comprises an upper window guide head 2, a slope support plate 3, a slope body 4, a lower window guide sleeve 5, a slope body joint 6, an upper reducing slip sleeve 7, an upper variable diameter slip 8, a rubber ring 9, an upper cone 10, an upper slip 11, a lower slip 12, a lower cone 13, a lower reducing slip sleeve 14 and a lower variable diameter slip 15, wherein the minimum anchoring diameter whipstock comprises the slope body 4, the slope body joint 6, the upper cone 10, the upper slip 11, the lower slip 12, the lower cone 13 and the like, when the anchoring diameter needs to be increased, the upper window guide head 2 is connected and welded to the tip of the slope body 4 by a thread, the slope support plate 3 is connected and welded to the lower end of the upper window guide head 2 and to the back of the slope body 4 by a thread, the lower window guide sleeve 5 is connected and welded to the upper slip sleeve 11 and the lower slip 12 by a thread, and the maximum anchoring diameter of the whipstock is increased by using the upper variable diameter slips 8 and the lower variable diameter slips 15.

The upper window guiding head 2 is a small semi-circular sleeve-shaped inclined plane body, the tip end of the upper window guiding head is a drill guiding surface 201 with a larger angle, a well track guiding surface 202 which forms a certain angle with the axis is connected with the drill guiding surface, the middle position of the solid side wall is a bolt hole I203, and welding holes I204 are symmetrically distributed on two sides of the bolt hole.

The lower window guide sleeve 5 is an annular sleeve body and is used for transition at the lower end of a window and increasing smoothness, an inclined plane which forms a certain angle with an axis is arranged on the side wall of the sleeve and is a well track guide surface 501, and a welding hole II 502, a bolt hole 503 and a breathing hole 504 are sequentially and symmetrically arranged in the sleeve wall on two sides of the guide surface.

Go up reducing slip cover 7 and down variable diameter slips 14 structure the same, cover body one end inner wall has a spacing step, radially equipartition is a plurality of slip grooves 902 that run through the cover body wall in the middle of the cover body, and the equipartition welds the hole 903 that runs through between the slip groove, and cover body main aspects and spacing step inboard have rubber circle recess 901 and 904 for place the rubber circle and guarantee the cover body between two parties, cover body both ends outer arris limit chamfer for prevent cutting to scratch.

The utility model provides a variable water proof pipe windowing whipstock of anchoring diameter, its use is as follows: the inclined plane body 4, the inclined plane body joint 6, the upper cone 10, the upper kava pieces 11, the lower kava pieces 12, the lower cone 13 and the like form a smallest anchoring diameter whipstock, when the anchoring diameter needs to be increased, the tip of the inclined plane body 4 is connected and welded with the upper window guide head 2 by screw thread, the lower end of the upper window guide head 2 is connected and welded with the inclined plane support plate 3 by screw thread on the back of the inclined plane body 4, the inclined plane joint 6 is in threaded connection and welded with a lower window guide sleeve 5, upper and lower variable diameter slip sleeves 7 and 14 are welded at the upper and lower slip fragments 11 and 12, and an upper and a lower variable diameter slips 8 and 15 are adopted, when the whipstock is hydraulically pressed to push the variable- diameter slip 8 and 15, the maximum anchoring diameter of the whipstock is increased, and the whipstock is further applied to windowing of the riser with larger size.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. The utility model provides a variable riser of anchoring diameter whipstock of windowing which characterized by: the device comprises an upper window guide head (2), an inclined plane support plate (3), an inclined plane body (4), a lower window guide sleeve (5), an inclined plane body joint (6), an upper reducing slip sleeve (7), an upper variable diameter slip (8), a rubber ring (9), an upper cone body (10), an upper slip bowl (11), a lower slip bowl (12), a lower cone body (13), a lower reducing slip sleeve (14) and a lower variable diameter slip (15), wherein the tip of the inclined plane body (4) is in threaded connection with the upper window guide head (2), the lower end of the upper window guide head (2) is in threaded connection with the lower inclined plane body (4) at the back of the inclined plane body (4), the inclined plane body joint (6) is in threaded connection with the lower window guide sleeve (5), the upper reducing slip sleeve (7) and the lower reducing slip sleeve (14) are welded with the upper slip bowl (11) and the lower slip bowl (12).

2. The whipstock of claim 1, wherein the whipstock comprises: the upper window guide head (2) is a small semi-circular sleeve-shaped inclined plane body, the tip of the upper window guide head is a drill guide surface (201) with the angle of 30-50 degrees, the drill guide surface (201) is connected with a well track guide surface (202) forming a certain angle with an axis, a first bolt hole (203) is formed in the middle of the side wall of the drill guide surface (201), and first welding holes (204) are symmetrically distributed on the two sides of the first bolt hole.

3. The whipstock of claim 1, wherein the whipstock comprises: lower window uide bushing (5) are the ring box body, the box body lateral wall is equipped with the orbit guide surface (501) that becomes certain angle with the axis, and the both sides of orbit guide surface (501) symmetrical arrangement welding hole two (502), bolt hole (503) and breathing hole (504) in proper order.

4. The whipstock of claim 1, wherein the whipstock comprises: go up reducing slip cover (7) and lower reducing slip cover (14) structure the same, cover body one end inner wall has a spacing step, radially equipartition is a plurality of slip grooves (902) that run through the cover body wall in the middle of the cover body, and the equipartition is between the slip groove welded hole (903) that run through, and cover body main aspects and spacing step inboard have rubber circle recess (901) and (904), the outer arris limit chamfer in cover body both ends.

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