阅读说明：本技术 一种带有保护壳的深水隔水管 (Deepwater marine riser with protective shell ) 是由 金国林 金鑫 江俊西 于 2019-09-09 设计创作，主要内容包括：本发明公开了一种带有保护壳的深水隔水管,包括套管、法兰、圆形缓冲珠、波纹管,所述法兰设置在套管两端,法兰面上间隔设置螺栓孔与凹槽,所述缓冲珠设置在上下两片法兰之间的凹槽内,所述凹槽面积大于缓冲珠最大截面积,凹槽深度为缓冲珠直径的1/4-1/3,所述波纹管设置在上下两片法兰外侧。本发明在深水隔水管外侧设有可移动保护罩,可以保护隔水管,延长隔水管的使用寿命。(The invention discloses a deepwater marine riser with a protective shell, which comprises a casing, flanges, circular buffer beads and a corrugated pipe, wherein the flanges are arranged at two ends of the casing, bolt holes and grooves are arranged on the surfaces of the flanges at intervals, the buffer beads are arranged in the grooves between an upper flange and a lower flange, the area of each groove is larger than the maximum sectional area of the buffer bead, the depth of each groove is 1/4-1/3 of the diameter of the buffer bead, and the corrugated pipe is arranged on the outer sides of the upper flange and the lower flange. The movable protective cover is arranged on the outer side of the deepwater marine riser, so that the marine riser can be protected, and the service life of the marine riser is prolonged.)

1. The utility model provides a deep water riser with protective housing which characterized in that: the novel corrugated pipe is characterized by comprising a sleeve, flanges, circular buffering beads and corrugated pipes, wherein the flanges are arranged at two ends of the sleeve, bolt holes and grooves are formed in the flange faces at intervals, the buffering beads are arranged in the grooves between the upper flange and the lower flange, the area of each groove is larger than the maximum sectional area of each buffering bead, the depth of each groove is 1/4-1/3 of the diameter of each buffering bead, and the corrugated pipes are arranged on the outer sides of the upper flange and the lower flange.

2. The deepwater riser with protective casing according to claim 1, wherein: the side face of the flange protrudes outwards to form an auxiliary area, and the auxiliary area is arranged on an extension line from the center of the flange to the center of the groove.

3. The deepwater riser with protective casing according to claim 1, wherein: the sleeve is a STB33 seamless steel tube.

4. The deepwater riser with protective casing according to claim 1, wherein: the flange is a flat welding flange.

5. The deepwater riser with protective casing according to claim 1, wherein: the cross section of the groove is circular.

6. The deepwater riser with protective casing of claim 5, wherein: the diameter of the bottom of the groove is more than or equal to 2 times of the diameter of the buffer bead.

Technical Field

The invention belongs to the technical field of marine risers, and particularly relates to a deepwater marine riser with a protective shell.

Background

An offshore riser is a casing from the bottom of an offshore drilling platform to the shallow seabed, and is mainly used for isolating seawater, leading in a drilling tool and the casing and forming a channel for slurry circulation. The upper fluid director and the lower blowout preventer are connected to form an important underwater drilling device, and in the offshore oil exploration process, a drilling riser is an important and weak link in the whole drilling system and is an important factor influencing the offshore drilling safety, so that the pressure resistance and the corrosion resistance of the riser need to be considered in a key manner, in addition, the transverse impact of ocean currents and the impact of certain foreign objects can damage the riser, and researchers are required to develop a protection structure to protect the riser.

Disclosure of Invention

In order to solve the problems, the invention discloses a deepwater riser with a protective shell, wherein a movable protective cover is arranged on the outer side of the deepwater riser to protect the riser and prolong the service life of the riser.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the deepwater marine riser with the protective shell comprises a casing, flanges, circular buffer beads and a corrugated pipe, wherein the flanges are arranged at two ends of the casing, bolt holes and grooves are formed in the surfaces of the flanges at intervals, the buffer beads are arranged in the grooves between an upper flange and a lower flange, the area of each groove is larger than the maximum sectional area of each buffer bead, the depth of each groove is 1/4-1/3 of the diameter of each buffer bead, and the corrugated pipe is arranged on the outer sides of the upper flange and the lower flange.

As a modification of the invention, the flange side surface is protruded outwards to form an auxiliary area, and the auxiliary area is arranged on an extension line from the flange center to the groove center.

As a refinement of the present invention, the sleeve is a STB33 seamless steel tube.

As an improvement of the invention, the flange is a flat welding flange.

As a refinement of the invention, the cross section of the groove is circular.

As an improvement of the invention, the diameter of the bottom of the groove is more than or equal to 2 times of the diameter of the buffer bead.

The invention has the beneficial effects that:

according to the deepwater riser with the protective shell, the movable protective cover is arranged on the outer side of the deepwater riser, so that the riser can be protected, and the service life of the riser is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of a flange according to the present invention.

Fig. 3 is a cross-sectional view of a groove according to the present invention.

List of reference numerals:

1. sleeve pipe, 2, flange, 3, buffering pearl, 4, recess, 5, bolt hole, 6, auxiliary area, 7, lock nut, 8, bellows.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in the figures, the deepwater riser with the protective shell comprises a casing 1, flanges 2 and circular buffer beads 3, wherein the flanges 2 are arranged at two ends of the casing 1, bolt holes 5 and grooves 4 are arranged on the surfaces of the flanges 2 at intervals, the buffer beads 3 are arranged in the grooves 4 between an upper flange and a lower flange 2, the area of the grooves 4 is larger than the maximum sectional area of the buffer beads 3, the depth of the grooves 4 is 1/4-1/3 of the diameter of the buffer beads 3, and corrugated pipes 8 are arranged on the outer sides of the upper flange and the lower flange (the corrugated pipes 8 are hot-welded on the outer sides of the casing up and down to ensure water tightness and can slide left and right).

During the use with the riser from the intraductal seabed that stretches into of sleeve, that is to say to the riser, the sleeve pipe has played the effect of protection casing, sleeve pipe 1 has adopted STB33 seamless steel pipe, the rigidity is good, compressive property is high, it is corrosion-resistant, long service life, on the other hand, set up buffering pearl 3 in the recess 4 between two upper and lower flanges 2, under the impact of the horizontal ocean current in seabed, buffering pearl 3 rolls and removes in the recess, it can the rock left and right sides and unload the power to drive the sleeve pipe, reduce the impact force to the riser body, the protection riser.

The buffering beads 3 are arranged in the grooves 4 between the upper flange and the lower flange 2, the two flanges are connected through bolts and nuts (note that the buffering beads 3 can move or rotate between the two flanges, namely, the distance between the two flanges is fixed through locking nuts to ensure that the buffering beads can freely run), and the outer sides of the flanges are provided with sealed corrugated pipes to form a protective cover for protecting the marine riser.

The side surface of the flange 2 protrudes outwards to form an auxiliary area 6, the auxiliary area 6 is arranged on an extension line from the center of the flange to the center of the groove 4, the auxiliary area is used for increasing the area of the flange plane and ensuring that the groove is large enough, the diameter of the bottom of the groove 4 is more than or equal to 2 times of the diameter of the buffer bead 3, and the buffer bead can freely run in the groove; the cross section of the groove 4 is circular, the inner side surface of the groove is arc-shaped, and the buffer beads cannot be flushed out of the groove.

The flange 2 is a flat welding flange.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.