CN219081510U - Device for reducing fatigue damage of marine deep water drilling guide pipe - Google Patents

Abstract

The utility model relates to a device for reducing fatigue damage of a marine deep water drilling guide pipe, which comprises a cylindrical fastener, wherein the fastener is sleeved on the guide pipe, so that the inner wall of the fastener can be pressed on a joint of the guide pipe and an adjacent weld joint, the fastener is formed by combining two fastening parts, the cross section of each fastening part in the radial direction of the fastener is in a semicircular arc shape, the side surface of each fastening part is provided with a locking plate protruding outwards, the locking plates are provided with locking holes, and when the two locking parts are assembled, the locking parts pass through the locking holes of the two locking parts, so that the locking plates of the two locking parts are tightly attached, and the locking parts are further provided with first reinforcing rib plates extending outwards. The utility model can reduce fatigue damage of the marine deep water drilling conduit joint and the welding seam position and improve the safety.

Description

Device for reducing fatigue damage of marine deep water drilling guide pipe

Technical Field

The utility model relates to the technical field of petroleum and natural gas engineering, in particular to a deep water drilling technology.

Background

When the ocean deepwater drilling operation is performed, the guide pipe is connected with the underwater wellhead, the periphery of the guide pipe is contacted with the seabed soft soil, and the circulating load transmitted by the wellhead is born. In-situ practices and researches find that the underwater wellhead and the guide pipe are easy to generate fatigue phenomenon at the joint and weld joint part in the long-term operation process, and the water depth of the sea area is increased more seriously. Once serious fatigue problems occur, it can cause fracture of the conduit, deflection or sinking of the wellhead, which can cause difficulties and safety problems for drilling or subsequent hydrocarbon production operations. At present, fatigue of an underwater wellhead is generally relieved by improving a design structure and adding a fatigue monitoring device, but most joints and welding seams of a guide pipe are below a seabed mud line, so that direct fatigue monitoring is inconvenient. And because catheters are generally standardized, it is difficult to make structural modifications to the catheters.

Disclosure of Invention

The utility model aims to provide a device for reducing fatigue damage of a marine deep water drilling guide pipe, which aims to solve the problem that fatigue is easy to occur at the joint and welding seam position of the guide pipe under a deep water wellhead.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a reduce device of ocean deep water well drilling pipe fatigue damage, includes the fastener of cylinder, the fastener cup joints on the pipe, makes the inner wall of fastener can be pressed and hold on the joint and the adjacent welding seam of pipe, the fastener is formed by two fastening portion combination, the cross-section of fastening portion in the radial direction of fastener is semicircle arc, the side of fastening portion is equipped with outwards convex locking plate, be equipped with the locking hole on the locking plate, when two when the locking portion is assembled, pass two through the locking piece the locking hole of locking portion, make two the locking plate of locking portion closely laminates, the locking portion still is equipped with outwards extending first deep floor.

According to the technical means, the fastening piece is sleeved on the guide pipe, and on the premise that the structure of the guide pipe is not improved, the inner wall of the fastening piece can be pressed on the joint of the guide pipe and the adjacent welding seam, so that the joint and the welding seam can be protected.

Further, when the two locking parts are assembled, the connecting line of the first reinforcing rib plates of the two locking parts at the installation positions of the corresponding locking parts coincides with a certain diameter direction of the radial section of the fastener.

Further, a second reinforcing rib plate is arranged between the fastening part and the locking plate, and two ends of the second reinforcing rib plate are fixedly connected with the locking plate and the fastening part respectively.

Further, each fastening portion is provided with two fastening plates, and the two fastening plates are respectively located at positions where the maximum chord length direction of the fastening portion intersects with the fastening portion.

Further, the inner wall of the fastener is provided with an annular groove, the axial direction of the annular groove coincides with the axial direction of the fastener, when the fastener is assembled on the guide pipe, the joint of the guide pipe is positioned in the annular groove, and the welding seam adjacent to the joint is positioned in the rest space in the fastener.

Further, in the axial direction of the annular groove, one half of the annular groove is located on one of the fastening portions, and the other half is located on the other fastening portion.

The utility model has the beneficial effects that:

the utility model can be quickly installed on the existing conduit with the same size and specification without changing the structure of the conduit, when the fastener is sheathed on the conduit, the inner wall of the fastener is pressed on the joint and the welding seam to play a role in preventing the conduit from rotating, the vertical and horizontal bearing capacity of the conduit is moderately improved, the protection part is further subjected to lower load, the groove structure in the fastener can tightly wrap the joint of the conduit and the upper and lower welding seam, the load born by the joint of the conduit and the upper and lower welding seam is transferred to the fastener, and the fastener bears the load, thereby reducing fatigue damage of the joint of the conduit and the welding seam of the marine deep water drilling well, and improving the safety.

Drawings

FIG. 1 is a schematic view of a retaining member installation position;

FIG. 2 is a schematic view of a locking member;

fig. 3 is a schematic view of the internal structure of the locking member.

Wherein, 1-well mouth; 2-a catheter; 3-a fastener; 31-a first reinforcing rib plate; 32-a fastening part; 33-locking member; 34-a second reinforcing rib plate; 35-locking plate; 36-an annular groove; 37-convex surface; 38-locking holes; 4-welding seams; 5-linker.

Detailed Description

Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the following description of the embodiments of the present utility model with reference to the accompanying drawings and preferred examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

The embodiment provides a device for reducing fatigue damage of an ocean deep water drilling guide pipe, as shown in fig. 1-3, the device comprises a fastening piece 3, the fastening piece 3 is of a cylindrical structure, the fastening piece 3 is formed by combining two fastening parts 32, the fastening parts 32 are of a semi-cylindrical structure, the fastening piece 3 is of a circular shape on the section of the fastening piece 3 in the radial direction, and the fastening parts 32 are of a semicircular shape.

The conduit 2 is installed below the wellhead 1, the fastener 3 is sleeved on the conduit 2 before the conduit 2 is lowered below the seabed mud line, and the joint 5 and the adjacent weld 4 are positioned in the fastener 3, so that the inner wall of the fastener 3 can tightly wrap the conduit 2.

Be equipped with first deep floor 31 on fastening portion 32, first deep floor 31 outwards protrusion, when fastener 3 cup joints on pipe 2 to when pipe 2 goes into under the seabed mud line through the mode of spraying, first deep floor 31 can insert among the seabed weak soil, and then can strengthen the contact force of pipe 2 and surrounding soil layer, on the other hand, when the pipe takes place the skew in seabed earth, first deep floor 31 plays the effect that blocks earth, thereby promotes the bending rigidity of fastener 3, and then better promotion fastener 3 prevent tired effect.

In this embodiment, the fastener 3 has two first reinforcing ribs 31, which are in one-to-one correspondence with the fastening portions 32, and the connecting line between the connecting positions of the two first reinforcing ribs 31 and the corresponding fastening portions 32 coincides with a certain diameter direction of the radial cross section of the fastener 3. Further improving the fatigue-preventing effect of the fastenable member 3.

The fastening portion 32 is provided with a locking plate 35, the locking plate 35 protrudes outwards, the locking plate 35 is provided with a locking hole 38, when the two fastening portions 32 are assembled into the fastening piece 3, the locking plates 35 of the fastening portions 32 are attached, then the locking piece penetrates through the locking hole 38 of the locking plate 35, the locking plates 35 are tightly attached, and then connection of the two fastening portions 32 is completed. In the present embodiment, two locking plates 35 are provided on each fastening portion 32, and the mounting positions of the two locking plates 35 on the fastening portion 32 correspond to two positions at which the maximum chord length on the radial cross section of the fastening portion 32 intersects with the circular arc of the fastening portion 32.

In this embodiment, the connection line of the mounting positions of the two locking plates 35 on the fastening portion 32 is perpendicular to the connection line of the two first reinforcing rib plates 31 on the corresponding fastening portion 32 connection positions.

In this embodiment, a second reinforcing rib plate 34 is further provided, two ends of the second reinforcing rib plate 34 are respectively and fixedly connected with the fastening portion 32 and the locking plate 35, so that the strength of the fastening portion 32 and the connection strength of the two fastening portions 32 are enhanced.

In this embodiment, an annular groove 36 is provided on the inner wall of the fastener 3, the axial direction of the annular groove 36 coincides with the axial direction of the fastener 3, and since the joint 5 protrudes in the radial direction of the conduit 2 relative to the weld bead 4, when the fastener 3 is sleeved on the conduit 2, the joint 5 is located in the annular groove 36, the annular groove 36 can clamp the joint 5, and another part of the inner wall of the fastener 3 is a protruding surface 37 relative to the bottom of the annular groove 36, the weld bead 4 is located in the space between the protruding surfaces 37 in the radial direction, and the protruding surface 37 is pressed against the weld bead 4.

In the present embodiment, in the axial direction of the annular groove 36, one half of the annular groove 36 is located on one of the fastening portions 32, and the other half is located on the other fastening portion 32.

In this embodiment, the shape and size of the annular groove 36 are matched with those of the catheter joint to be protected, so that the joint 5 and the upper and lower weld joints 4 can be tightly wrapped when the device is locked. The load born by the joint 5 and the upper and lower weld joints 4 is transferred to the fastener 3 and borne by the fastener 3. Even if fatigue failure of the final fastener 3 occurs with time, the fatigue damage time of the joint 5 and the upper and lower weld 4 portions to be protected is shortened.

Because of the difference in stress conditions experienced by the pipe below the mud line, the stress is greater at a location below the mud line (which is related to both soil layer properties and pipe properties, e.g., 30 m), and decreases to zero as depth increases. Therefore, the device is mainly arranged at the upper part of the pipe section, and the lower part does not need to be arranged. The specific installation quantity can be determined according to the ocean environment working condition, the soil layer property below the seabed mud line and the conduit performance.

The above embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model.

Claims (6)

1. The utility model provides a reduce device of ocean deep water drilling pipe fatigue damage which characterized in that: including the fastener of cylinder, the fastener cup joints on the pipe, make the inner wall of fastener can be pressed and hold on the joint and the adjacent welding seam of pipe, the fastener is formed by two fastening portion combinations, the cross-section of fastening portion in the radial direction of fastener is semicircle arc, the side of fastening portion is equipped with outwards convex locking plate, be equipped with the locking hole on the locking plate, when assembling two during the fastening portion, pass two through the locking piece locking hole of fastening portion makes two the locking plate of fastening portion closely laminates, fastening portion still is equipped with outwards extending first deep floor.

2. The apparatus according to claim 1, wherein: when the two fastening parts are assembled, the connecting line of the first reinforcing rib plates of the two fastening parts at the mounting positions of the corresponding fastening parts coincides with a certain diameter direction of the radial section of the fastening part.

3. The apparatus according to claim 2, wherein: a second reinforcing rib plate is arranged between the fastening part and the locking plate, and two ends of the second reinforcing rib plate are fixedly connected with the locking plate and the fastening part respectively.

4. A device according to claim 3, characterized in that: each fastening part is provided with two fastening plates, and the two fastening plates are respectively positioned at the intersection position of the maximum chord length direction of the fastening part and the fastening part.

5. The apparatus according to claim 1, wherein: the inner wall of the fastener is provided with an annular groove, the axial direction of the annular groove coincides with the axial direction of the fastener, when the fastener is assembled on the guide pipe, the joint of the guide pipe is positioned in the annular groove, and the welding seam adjacent to the joint is positioned in the rest space in the fastener.

6. The apparatus according to claim 5, wherein: in the axial direction of the annular groove, one half of the annular groove is located on one of the fastening portions, and the other half is located on the other fastening portion.

Images