阅读说明：本技术 分流器壳体保护装置 (Shunt casing protection device ) 是由 刘正礼 许亮斌 张新平 盛磊祥 *** 刘书杰 李彬 刘健 李朝玮 逄淑华 于 2020-07-27 设计创作，主要内容包括：本发明公开了包括一种分流器壳体保护装置,包括依次套设在隔水管外的扶正装置和防磨衬套,所述扶正装置和所述防磨衬套在进入所述分流器壳体之前预连接；所述防磨衬套包括使所述防磨衬套在所述壳体内轴向限位的限位凸缘,以及对壳体内壁进行保护的衬套本体,所述限位凸缘设于所述衬套本体的一端,并自所述衬套本体外壁沿径向向外延伸。本发明通过防磨衬套和扶正装置的配合使用,使得隔水管被固定在分流器壳体中心,不会在波流的作用下发生倾斜,同时,防磨衬套用于避免由于扶正装置相对分流器壳体上下移动导致的分流器壳体内壁的磨损,进而对分流器壳体进行保护,避免分流器的磨损消耗。(The invention discloses a flow divider shell protection device, which comprises a righting device and an anti-abrasion bushing which are sequentially sleeved outside a water-resisting pipe, wherein the righting device and the anti-abrasion bushing are pre-connected before entering the flow divider shell; the anti-abrasion bushing comprises a limiting flange which enables the anti-abrasion bushing to be axially limited in the shell, and a bushing body which protects the inner wall of the shell, wherein the limiting flange is arranged at one end of the bushing body and extends outwards along the radial direction from the outer wall of the bushing body. The anti-abrasion bushing and the centering device are matched for use, so that the marine riser is fixed at the center of the diverter shell and cannot incline under the action of wave flow, and meanwhile, the anti-abrasion bushing is used for avoiding abrasion of the inner wall of the diverter shell due to the fact that the centering device moves up and down relative to the diverter shell, so that the diverter shell is protected, and abrasion consumption of the diverter is avoided.)

1. A flow divider shell protection device is characterized by comprising a centering device (10) and an anti-abrasion bushing (20) which are sequentially sleeved outside a riser (60), wherein the centering device (10) and the anti-abrasion bushing (20) are pre-connected before entering a flow divider shell (50);

the anti-abrasion bushing (20) comprises a limiting flange (21) which enables the anti-abrasion bushing (20) to be axially limited in the shell, and a bushing body (22) which protects the inner wall of the shell, wherein the limiting flange (21) is arranged at one end of the bushing body (22) and extends outwards along the radial direction from the outer wall of the bushing body (22).

2. Diverter housing protection according to claim 1, characterized in that the centering device (10) and the bushing body (22) are pre-connected by at least one shear pin (30) that shears under shear forces, at least two shear pins (30) being circumferentially equispaced on the bushing body (22).

3. Diverter housing protection according to claim 2, characterized in that the riser (60) is fixedly connected to the centralizer (10), that there is a clearance fit between the centralizer (10) and the liner body (22), and that there is an interference fit between the liner body (22) and the diverter housing (50).

4. Diverter housing protection according to claim 3, characterized in that the righting means (10) is a righting post fitted over the riser (60), the righting post having an outer diameter smaller than the inner diameter of the bushing body (22).

5. The diverter housing protection device according to claim 3, wherein the centering device (10) comprises a central sleeve (11) sleeved outside the riser (60) and at least two centering pieces (12) symmetrically arranged outside the central sleeve (11), the central sleeve (11) is fixedly connected with the centering pieces (12), and a plurality of the centering pieces (12) are uniformly distributed along the outer wall of the central sleeve (11).

6. Diverter housing protection according to claim 5, characterized in that each righting segment (12) is provided with at least one shear pin (30), the bushing body (22) being pre-connected to the righting segment (12) by means of the shear pin (30).

7. The diverter housing protection device according to claim 1, wherein the diverter housing (50) protection device further comprises a recovery mechanism (40) for recovering the wear bushing (20), wherein the bottom of the recovery mechanism (40) abuts against the riser (60) through a limiting device (41), and the limiting device (41) is fixedly connected with the riser (60).

8. The shunt housing protection device of claim 7, wherein the recovery mechanism (40) is a planar recovery mechanism (40) having a diameter less than an inner diameter of the shunt housing (50) and greater than an inner diameter of the bushing body (22).

9. The diverter housing protector according to claim 7, wherein the recovery mechanism (40) includes a recovery bottom surface (42) and a recovery sidewall (43) surrounding the recovery bottom surface (42), the recovery sidewall (43) being disposed on the recovery bottom surface (42) and oriented toward the wear bushing (20).

10. The shunt housing protection device according to claim 9, wherein the bushing body (22) further comprises at least one protrusion (23) disposed on an outer wall of the bushing body (22), a bottom surface of the protrusion (23) is a recovery end surface (221) in fit abutment with the recovery side wall (43), and a distance from the recovery end surface (221) to the bottom surface of the bushing body (22) is the same as a height of the recovery side wall (43).

Technical Field

The invention relates to the field of mechanical protection, in particular to a shunt shell protection device.

Background

In the prior art, a deepwater floating drilling platform is generally used for drilling, and a drilling platform of the deepwater floating drilling platform comprises a diverter housing arranged right below the platform, and a diverter on a drilling riser is matched to guide drilling fluid circulated out of a shaft into a drilling fluid treatment system. The internal diameter of deep water floating drilling platform's shunt casing is generally 60.5in, and about the external diameter 45in of drilling riser (including buoyancy piece), when hanging the riser, under the effect of ripples, the riser takes place to incline can collide the shunt casing, and frequent instantaneous collision impact probably damages shell structure and riser up-and-down motion contact wearing and tearing casing makes the shells inner wall take place wearing and tearing, is unfavorable for the permanent safe handling of shunt.

Disclosure of Invention

The present invention provides a shunt casing protection device, which aims at overcoming the defects of the prior art.

The technical scheme adopted by the shunt shell protection device for solving the technical problems is as follows:

the shunt shell protecting device comprises a righting device and an anti-abrasion bushing which are sequentially sleeved outside a riser, wherein the righting device and the anti-abrasion bushing are pre-connected before entering the shunt shell;

the anti-abrasion bushing comprises a limiting flange which enables the anti-abrasion bushing to be axially limited in the shell, and a bushing body which protects the inner wall of the shell, wherein the limiting flange is arranged at one end of the bushing body and extends outwards along the radial direction from the outer wall of the bushing body.

Preferably, the centering device and the bushing body are pre-connected through at least one shear pin sheared under the action of shearing force, and at least two shear pins are uniformly distributed on the circumference of the bushing body.

Preferably, the riser is fixedly connected with the centering device, the centering device is in clearance fit with the bushing body, and the bushing body is in interference fit with the diverter housing.

Preferably, the centering device is a centering column sleeved outside the riser, and the outer diameter of the centering column is smaller than the inner diameter of the bushing body.

Preferably, the centering device comprises a central sleeve sleeved outside the riser and at least two centering pieces symmetrically arranged outside the central sleeve, the central sleeve is fixedly connected with the centering pieces, and the centering pieces are uniformly distributed along the outer wall of the central sleeve.

Preferably, each righting piece is provided with at least one shear pin, and the bushing body is pre-connected with the righting piece through the shear pin.

Preferably, the shunt casing protection device further comprises a recovery mechanism for recovering the abrasion-proof bushing, the bottom of the recovery mechanism is abutted against the marine riser through a limiting device, and the limiting device is fixedly connected with the marine riser.

Preferably, the recovery mechanism is a planar recovery mechanism with a diameter smaller than the inner diameter of the diverter housing and larger than the inner diameter of the bushing body.

Preferably, the recovery mechanism includes the recovery bottom surface and encloses and establish retrieve the lateral wall around retrieving the bottom surface, it locates to retrieve the lateral wall on the bottom surface and towards the setting of abrasionproof bush direction.

Preferably, the bush body is provided with at least one protrusion arranged on the outer wall of the bush body, the bottom surface of the protrusion is a recovery end surface which is in fit butt joint with the recovery side wall, and the distance from the recovery end surface to the bottom surface of the bush body is the same as the height of the recovery side wall.

The invention has the following beneficial effects: the anti-abrasion bushing and the centering device are matched for use, so that the marine riser is fixed at the center of the diverter shell and cannot incline under the action of wave flow, and meanwhile, the anti-abrasion bushing is used for avoiding abrasion caused by the fact that the centering device moves up and down relative to the diverter shell, so that the diverter shell is protected, and abrasion consumption of the diverter is avoided.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of the invention in a state ready for entry into a diverter housing;

FIG. 2 is a schematic view of the present invention in a configuration after the diverter housing has been entered and the shear pin has not been sheared;

FIG. 3 is a schematic view of the present invention in a configuration after the shear pin has broken after entering the diverter housing;

FIG. 4 is a schematic view of the recovery mechanism of the present invention in a configuration abutting the wear bushing;

FIG. 5 is a schematic view of the recovery mechanism of the present invention in a configuration for recovery with the riser along with the wear sleeve;

FIG. 6 is a sectional view taken along line A-A of FIG. 2 in accordance with a first embodiment of the present invention;

fig. 7 is a sectional view taken along line a-a of fig. 2 in a second embodiment of the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The invention provides a diverter housing protection device which can be particularly used for a deep water floating drilling platform and can avoid abrasion caused by frequent collision of the inner wall of a diverter housing 50 by a riser 60. As shown in fig. 1, the splitter casing protection device may include a centralizer 10 and an anti-wear liner 20 that are sequentially fitted over the riser 60, wherein the centralizer 10 and the anti-wear liner 20 are pre-connected before entering the splitter casing 50, and enter the splitter casing 50 along with the riser 60.

In some embodiments, the centralizer 10 is used to fix the position of the riser 60 in the diverter housing 50, and prevent the suspended riser 60 from tilting under the action of wave current and further colliding against the inner wall of the diverter housing 50. as a first embodiment of the present invention, referring to fig. 6, the centralizer 10 is embodied as a centralizer column having an inner diameter equal to the outer diameter of the riser 60, the outer diameter of the centralizer column is smaller than the inner diameter of the wear-resistant bush 20, the centralizer column is sleeved outside the riser 60, and cooperates with the wear-resistant bush 20 to keep the riser 60 at the center of the diverter housing 50 without tilting; as a second embodiment of the present invention, referring to fig. 7, the centralizer 10 includes a central sleeve 11 sleeved on the riser 60 and a plurality of centralizing pieces 12 uniformly distributed along the outer wall of the central sleeve 11, preferably, the plurality of centralizing pieces 12 are equal in width, and the width direction of the plurality of centralizing pieces is arranged along the radial direction of the central sleeve 11. The central sleeve 11 is fixedly connected to the centralizing pieces 12, and preferably, the centralizing pieces 12 are symmetrically arranged on the central sleeve 11 in pairs, so that the riser 60 arranged in the central sleeve 11 is always located in the center of the diverter housing 50.

Further, in some embodiments, in order to prevent the righting device 10 from moving up and down relative to the inner wall of the diverter housing 50 together with the platform due to the settling motion of the platform under the influence of waves and further to wear the inner wall of the diverter housing 50, the invention further provides an anti-wear bushing 20 outside the righting device 10, wherein the anti-wear bushing 20 comprises a limit flange 21 for limiting the anti-wear bushing 20 on the housing in the axial direction, and a bushing body 22 capable of being placed in the diverter housing 50, and particularly, the limit flange 21 is used for limiting the downward movement tendency of the anti-wear bushing 20 in the axial direction. In some embodiments, a stop flange 21 is provided at one end of the bushing body 22, extending radially outward from the outer wall of the bushing body 22, and has an outer diameter greater than the inner diameter of the diverter housing 50. the stop flange 21 abuts the top end of the diverter housing 50 on the diverter housing 50, so that the wear bushing 20 is hung on the diverter housing 50 to provide an axially downward stop. In some embodiments, to prevent the riser 60 from moving the wear sleeve 20 upward during lifting, an interference fit is provided between the sleeve body 22 and the splitter housing 50 such that the wear sleeve 20 is axially fully retained against the splitter housing 50 inner wall to protect the splitter housing 50 inner wall. Further, in some embodiments, a plurality of protrusions 23 are uniformly distributed on the outer wall of the bushing body 22, in some embodiments, the protrusions 23 are annular protrusions, wherein one or a plurality of annular protrusions may be provided, and the plurality of annular protrusions are axially arranged on the outer wall of the bushing body 22 at intervals along the axial direction of the bushing body 22; in other embodiments, the protrusions 23 are in a dot shape or a block shape, and the protrusions 23 are disposed at intervals and annularly and uniformly distributed on the outer wall of the bushing body 22, so as to appropriately reduce the resistance when the wear-resistant bushing 20 enters the diverter housing 50, thereby facilitating the operation of a worker. When the bushing body 22 is externally provided with a plurality of protrusions 23, the bushing body 22 provided with the protrusions 23 is in interference fit with the inner wall of the diverter housing 50.

In the invention, the shear pin 30 means that the pin can be used as a connecting device in a normal state, so that the centralizer 10 and the anti-wear bushing 20 are fixedly connected, after the limit flange 21 of the anti-wear bushing 20 is abutted to the diverter housing 50, downward pressure is continuously applied to the marine riser 60, and at the moment, the shear pin 30 is subjected to certain shearing force and is sheared under the action of the shearing force, so that the centralizer 10 and the anti-wear bushing 20 are relatively separated along the axial direction. In some embodiments, the plurality of shear pins 30 are uniformly distributed on the liner body 22 along the circumference, when the wear-resistant liner 20 is separated from the centralizer 10 relatively, the wear-resistant liner 20 is hung on the splitter casing 50, when the platform subsides to drive the marine riser 60 to move axially, the centralizer 10 and the wear-resistant liner 20 form an axial up-and-down motion pair, the wear-resistant liner 20 protects the inner wall of the splitter casing 50 from being worn, and the centralizer 10 can still centralize the marine riser 60. In some embodiments, the wear bushing 20 is a clearance fit with the centralizer 10 such that the separated centralizer 10 can be moved smoothly downward relative to the wear bushing 20. In this embodiment, the centralizer 10 and the anti-wear liner 20 are pre-assembled by the shear pin 30 and enter the diverter housing 50 together with the riser 60, so that the anti-wear liner 20 and the riser 60 can be simultaneously installed in a single operation, multiple launching operations are not required, and the operation is convenient.

Further, after the riser 60 is finished, since the centralizer 10 is separated from the anti-wear liner 20, when the riser 60 drives the centralizer 10 to move back, the anti-wear liner 20 needs to be recovered together. The present invention also includes, in some embodiments, a recovery mechanism 40 for recovering the wear sleeve 20, the outer diameter of the recovery mechanism 40 being smaller than the inner diameter of the diverter housing 50 and larger than the inner diameter of the sleeve body 22, so that when the riser 60 moves up, the recovery mechanism 40 brings the wear sleeve 20 up by abutting against the bottom of the wear sleeve 20, thereby recovering the wear sleeve 20.

In some embodiments, the bottom of recovery mechanism 40 is abutted against riser 60 by stop 41 so that when riser 60 is retracted back up, recovery mechanism 40 moves up with it. In some embodiments, stop device 41 is fixedly disposed on riser 60 and has an outer diameter greater than the outer diameter of riser 60 for abutting against recovery mechanism 40. As a first embodiment of the present invention, the recycling mechanism 40 is a planar recycling mechanism 40, and can be used to abut against the bottom of the anti-wear bush 20, so as to drive the anti-wear bush 20 to move upward together for recycling; as a second embodiment of the present invention, the recovery mechanism 40 includes a recovery bottom surface 42 and a recovery sidewall 43 surrounding the recovery bottom surface 42 to prevent the wear sleeve 20 from tilting and even dropping out of the riser 60 after being recovered out of the diverter housing 50. Preferably, the recycling side wall 43 is disposed around the recycling bottom surface 42, perpendicular to the recycling bottom surface 42, and facing the installation direction of the anti-wear bush 20; corresponding to the recovery side wall 43, the liner body 22 is provided with a recovery end surface 221 abutted to the recovery side wall 43 in a matching manner, the recovery end surface 221 may specifically be a bottom surface of the protrusion 23 on the outer wall of the liner body 22, wherein, referring to fig. 4, in this embodiment, the outer diameter of the liner body 22 is smaller than or equal to the inner diameter of the recovery side wall 43, the distance from the recovery end surface 221 to the bottom surface of the liner body 22 is the same as the height of the recovery side wall 43, so that the recovery side wall 43 abuts to the recovery end surface 221 of the liner body 22, the recovery bottom surface 42 may abut to the bottom surface of the liner body 22, when the liner body 22 is completely separated from the diverter housing 50, the recovery side wall 43 plays a role in centering the anti-. By arranging the recovery mechanism 40 on the marine riser 60, the abrasion-proof lining can be recovered while the marine riser 60 is recovered, and the recovery is simple and efficient without needing to operate at a single time.

In the present invention, fig. 1-5 show the working flow of the present invention in some embodiments, when the inner wall of the diverter needs to be protected, referring to fig. 1, the abrasion-proof bushing 20 and the centralizer 10 are pre-connected by the shear pin 30, and the recovery mechanism 40 is installed on the riser 60 below the centralizer 10; referring to fig. 2, the riser 60 is lifted by a platform drilling rig hook (not shown), and moves down together with the anti-wear liner 20, the centralizer 10 and the recovery mechanism 40, and is installed in the diverter housing 50, after the limit flange 21 of the anti-wear liner 20 abuts against the top end of the diverter housing 50, the riser 60 is continuously pressed down by the platform drilling rig hook, so that the shear pin 30 is broken, referring to fig. 3, the anti-wear liner 20 is separated from the centralizer 10, the anti-wear liner 20 is suspended on the diverter housing 50, the centralizer 10 starts to work as the riser 60 continues to move down, when the platform subsides to drive the riser 60 to move axially, an axial up-and-down motion pair is formed between the centralizer 10 and the anti-wear liner 20, the anti-wear liner 20 protects the inner wall of the diverter housing 50 from being worn, and meanwhile, the centralizer 10 continuously centralizes the suspended riser 60, so that the riser 60 is always centered in the splitter housing 50. When the riser 60 is moved upwards for recovery, referring to fig. 4-5, the recovery mechanism 40 moves upwards together with the riser 60 through the limiting device 41, and when the recovery mechanism 40 is lifted up together with the riser 60 to abut against the anti-wear bush 20, the bottom surface of the anti-wear bush 20 is abutted against the recovery bottom surface 42 in a matching manner, and the recovery end surface 221 of the anti-wear bush 20 is abutted against the recovery side wall 43 in a matching manner, so that the anti-wear bush 20 is driven to be recovered and taken out together, and recovery is completed.

It will be appreciated that in figures 1-5 the positions of the splitter housing 50 and the riser 60 are shown, but in the present invention the splitter housing 50 and the riser 60 are used only to assist in the description of the inventive solution and neither the splitter housing 50 nor the riser 60 should be understood as part of the inventive protective protector device.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.