Guide pipe shoe capable of preventing guide pipe from rotating

Abstract

The utility model discloses a guide pipe shoe capable of preventing a guide pipe from rotating. The guide pipe shoe comprises a guide pipe shoe body, a plurality of body reinforcing ribs and at least one anti-rotating reinforcing rib used for increasing rotating resistance. One end of the guide pipe shoe body is provided with a concave groove; the body reinforcing ribs and the anti-rotation reinforcing ribs are distributed on the outer surface of the guide pipe shoe body at intervals in the circumferential direction of the guide pipe shoe body, and each body reinforcing rib and each anti-rotation reinforcing rib extend in the axial direction of the guide pipe shoe body. The guide pipe shoe capable of preventing the guide pipe from rotating is suitable for offshore drilling riser piling operation, the rotation resistance of the guide pipe in a stratum after the guide pipe enters mud is increased due to the additional arrangement of the anti-rotation reinforcing ribs, and the effect of preventing the guide pipe from rotating is achieved; the beveled edge is arranged at the end part of the guide pipe shoe, so that the purpose of directional piling of the guide pipe can be realized, and the guide pipe can be prevented from rotating.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore drilling operations, in particular to a catheter shoe for preventing the catheter from rotating. Background Art

[0002] In offshore drilling operations, directional riser piling technology can achieve pre-deflection of the riser, which is significantly beneficial for shallow-layer deflection in extended-reach wells and surface collision prevention in infill adjustment wells. Ensuring that the riser is pre-deflected in the designed orientation is key to achieving effective directional riser piling. Otherwise, the riser's rotation could lead to the opposite effect, causing complications downhole.

[0003] In existing directional piling operations, the main method is to mark the high side of the pipe and then align the marked line with the designed direction when connecting the pipe to ensure that the pipe is lowered in the intended direction. However, this method cannot prevent the pipe from rotating after it is driven into the mud, and the anti-rotation effect is poor.

[0004] Therefore, how to achieve the anti-rotation function during the directional piling of the water-proof conductor and ensure that the conductor is pre-inclined in the designed orientation is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a catheter shoe which can prevent the catheter from rotating.

[0006] The utility model solves the technical problem by adopting a technical solution: providing a catheter shoe for preventing catheter rotation, comprising a catheter shoe body, a plurality of body reinforcement ribs and at least one anti-rotation reinforcement rib for increasing rotation resistance; one end of the catheter shoe body is provided with an inwardly concave groove;

[0007] A plurality of the body reinforcement ribs and the anti-rotation reinforcement ribs are distributed at intervals on the outer surface of the catheter shoe body along the circumference of the catheter shoe body, and each of the body reinforcement rib and the anti-rotation reinforcement rib extends along the axial direction of the catheter shoe body.

[0008] Preferably, the groove comprises a horizontal section and an oblique section connected to each other, and the oblique section is connected to the horizontal section at its highest point.

[0009] Preferably, a side of the horizontal section opposite to the oblique section and a side of the oblique section opposite to the horizontal section respectively form a high side and a low side of the groove; and the anti-rotation reinforcement ribs are respectively provided on the outer surface of the catheter shoe body at positions corresponding to the high side and the low side.

[0010] Preferably, the connection point between the horizontal section and the oblique section is located in the diameter direction of the catheter shoe body.

[0011] Preferably, the protruding height of the anti-rotation reinforcement rib on the outer surface of the catheter shoe body is greater than the protruding height of the body reinforcement rib.

[0012] Preferably, the catheter shoe body is a steel pipe.

[0013] Preferably, the bevel is a bevel formed by cutting on the catheter shoe body.

[0014] Preferably, the body reinforcement rib and the anti-rotation reinforcement rib are respectively integrally formed on the catheter shoe body.

[0015] The beneficial effects of the utility model are as follows: it is suitable for offshore drilling water-insulating conductor pile driving operations, and the addition of anti-rotation reinforcement ribs increases the rotational resistance of the conductor in the formation after entering the mud, thereby preventing the conductor from rotating; the bevel setting at the end of the conductor shoe can, on the one hand, achieve the purpose of directional conductor piling, and on the other hand, also help prevent the conductor from rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 This is a schematic side view of the structure of a catheter shoe that prevents catheter rotation according to an embodiment of the present invention;

[0018] Figure 2 This is a front structural schematic diagram of a catheter shoe for preventing catheter rotation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0020] like Figure 1 、 Figure 2 As shown, a catheter shoe for preventing catheter rotation according to an embodiment of the present invention may include a catheter shoe body 10 , a plurality of body reinforcement ribs 11 disposed on the outer surface of the catheter shoe body 10 , and at least one anti-rotation reinforcement rib 12 .

[0021] Several body reinforcement ribs 11 and anti-rotation reinforcement ribs 12 are spaced apart along the circumference of the catheter shoe body 10 and arranged on the outer surface of the catheter shoe body 10. Each body reinforcement rib 11 and anti-rotation reinforcement rib 12 extends axially along the catheter shoe body 10. The body reinforcement ribs 11 are conventional reinforcement ribs, primarily serving to enhance the catheter shoe's structural strength. The anti-rotation reinforcement ribs 12 increase the catheter shoe's rotational resistance, thereby preventing the catheter from rotating. Of course, the anti-rotation reinforcement ribs 12 also contribute to the catheter shoe's structural strength.

[0022] In order to reflect the anti-rotation effect of the anti-rotation reinforcement ribs 12, the protruding height of the anti-rotation reinforcement ribs 12 on the outer surface of the catheter shoe body 10 is greater than the protruding height of the body reinforcement ribs 11, which mainly increases the height of the reinforcement ribs on the outer surface of the catheter shoe body 10, expands the contact area between the reinforcement ribs and the formation, thereby increasing the catheter rotation resistance and achieving the purpose of preventing the catheter from rotating.

[0023] The protruding height of the anti-rotation reinforcement rib 12 can be a multiple (such as one, two or more) of the protruding height of the main body reinforcement rib 11, and the specific multiple is designed according to the size of the guide groove and the conduit. The width of the anti-rotation reinforcement rib 12 is the same as the width of the main body reinforcement rib 11.

[0024] Alternatively, the anti-rotation reinforcement rib 12 and the body reinforcement rib 11 may be integrally formed on the catheter shoe body 10 .

[0025] The catheter shoe body 10 has two opposite ends, and a concave groove 20 is provided at one end of the catheter shoe body 10. The groove 20 can achieve the purpose of directional piling of the catheter and also helps to prevent the catheter from rotating.

[0026] Specifically, the groove 20 includes a horizontal section 21 and an oblique section 22. The oblique section 22 is mainly used to achieve directional piling, and the horizontal section 21 is used to improve the stability of the guide tube and reduce the rotation of the guide tube.

[0027] The catheter shoe is placed in the direction of use as an example (such as Figure 1 The groove 20 is provided on the downward end of the catheter shoe body 10, and the oblique section 22 is connected to the horizontal section 21 at its highest point.

[0028] Horizontal section 21 is Figure 1 The BC section, oblique section 22 is Figure 1 The AB segment in the figure, wherein the B end is the highest point of the oblique segment 22 and the connection point with the horizontal segment 21. The A end is the lowest point of the oblique segment 22.

[0029] The angle α of the oblique section 22 (the angle between the oblique section 22 and the outer surface of the catheter shoe body 10) can be designed based on directional pre-deflection requirements, seabed geotechnical parameters, and catheter parameters. Generally speaking, the smaller the angle α, the better the directional pre-deflection effect and the stronger the penetration capability. This setting needs to be based on parameters such as the actual formation strength and the catheter's penetration depth.

[0030] Preferably, the connection point between the horizontal section 21 and the oblique section 22 is in the diameter direction of the catheter shoe body 10. In other words, the line connecting the connection points between the ends of the horizontal section 21 and the ends of the oblique section 22 passes through the center of the catheter shoe body 10.

[0031] refer to Figure 1In this embodiment, the side of the horizontal section 21 opposite to the oblique section 22 and the side of the oblique section 22 opposite to the horizontal section 21 respectively form the high side and the low side of the groove 20. On the outer surface of the catheter shoe body 10, anti-rotation reinforcement ribs 12 are provided at positions corresponding to the high side and the low side. That is, Figure 1 In the illustrated embodiment, two anti-rotation reinforcement ribs 12 are provided on the outer surface of the catheter shoe body 10 . The two anti-rotation reinforcement ribs 12 are located on opposite sides of the catheter shoe body 10 and on the high side and the low side of the groove 20 , respectively.

[0032] In combination with the arrangement of the groove 20 , the anti-rotation reinforcement ribs 12 and the body reinforcement ribs 11 extend from the outer surface of the catheter shoe body 10 to the edge of the groove 20 .

[0033] The catheter shoe body 10 is usually formed of a steel pipe, and the groove 20 can be cut and formed on the catheter shoe body 10 .

[0034] The utility model is suitable for the directional piling operation of the riser conductor in shallow pre-deflection and densification adjustment wells of offshore large-displacement wells.

[0035] refer to Figure 1 、 Figure 2 During the operation, the guide shoe is welded to the lowest end of the watertight riser, which is typically composed of several guides connected in sequence to form a guide string of the designed length. A pile hammer is then used at the rig to hammer the guide string into the seabed to the set depth. Under the action of the inclined section 22 of the guide shoe's groove 20, the guide tube will tilt toward end A, achieving the purpose of pre-inclined directional piling. The anti-rotation reinforcement ribs 12 and the horizontal section 21 of the groove 20 restrict the guide tube's rotation in the formation, achieving an anti-rotation effect for directional piling.

[0036] The anti-conduit rotation conduit shoe of the utility model is not only suitable for offshore watertight conduit directional piling, achieving the purpose of preventing conduit rotation and enhancing the directional effect of watertight conduit directional piling, but is also suitable for installation projects of other building pile foundations.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A catheter shoe for preventing catheter rotation, characterized in that: It includes a catheter shoe body, a plurality of body reinforcement ribs and at least one anti-rotation reinforcement rib for increasing rotation resistance; one end of the catheter shoe body is provided with an inwardly concave groove; A plurality of the body reinforcement ribs and the anti-rotation reinforcement ribs are distributed at intervals on the outer surface of the catheter shoe body along the circumference of the catheter shoe body, and each of the body reinforcement rib and the anti-rotation reinforcement rib extends along the axial direction of the catheter shoe body.

2. The catheter shoe according to claim 1, characterized in that The groove includes a horizontal section and an oblique section connected to each other, and the oblique section is connected to the horizontal section at its highest point.

3. The catheter shoe according to claim 2, characterized in that: The side of the horizontal section opposite to the oblique section and the side of the oblique section opposite to the horizontal section respectively form the high side and the low side of the groove; The anti-rotation reinforcement ribs are respectively provided on the outer surface of the catheter shoe body at positions corresponding to the high side and the low side.

4. The catheter shoe according to claim 2, characterized in that: The connection point between the horizontal section and the oblique section is located in the diameter direction of the catheter shoe body.

5. The catheter shoe according to any one of claims 1 to 4, characterized in that: The protruding height of the anti-rotation reinforcement rib on the outer surface of the catheter shoe body is greater than the protruding height of the body reinforcement rib.

6. The catheter shoe according to any one of claims 1 to 4, characterized in that: The catheter shoe body is a steel pipe.

7. The catheter shoe according to claim 6, characterized in that: The groove is a groove formed by cutting on the catheter shoe body.

8. The catheter shoe according to any one of claims 1 to 4, characterized in that: The body reinforcement ribs and the anti-rotation reinforcement ribs are respectively integrally formed on the catheter shoe body.

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