阅读说明：本技术 一种用于水下油气钻采的功能舱 (Functional cabin for underwater oil and gas drilling and production ) 是由 徐孝轩 熊泽华 邱伟伟 肖德雨 陈从磊 王伟超 于 2018-06-11 设计创作，主要内容包括：本申请提供了一种用于水下油气钻采的功能舱,该功能舱包括：舱体；下舱盖,其与所述舱体密封式连接,且其背离所述舱体的一侧用于与井口连接器密封式连接；干式钻采设备,其设置在由所述舱体和所述下舱盖形成的密闭空间内。通过本申请的功能舱,能够隔绝恶劣的深水环境,为舱内的干式钻采设备提供一个相对稳定的工作状态,提高水下装置的安全可靠性并可降低设备成本。(The application provides a function cabin for oil and gas is bored under water and is adopted, this function cabin includes: a cabin body; the lower cabin cover is hermetically connected with the cabin body, and one side of the lower cabin cover, which is far away from the cabin body, is used for being hermetically connected with the wellhead connector; and the dry drilling and production equipment is arranged in a closed space formed by the cabin body and the lower cabin cover. The functional cabin can isolate severe deep water environment, provides a relatively stable working state for dry drilling and production equipment in the cabin, improves the safety and reliability of an underwater device, and can reduce the equipment cost.)

1. A functional compartment for underwater oil and gas drilling, comprising:

A cabin body;

the lower cabin cover is connected with the cabin body in a sealing mode, and one side of the lower cabin cover, which is far away from the cabin body, is used for being connected with the well head connector in a sealing mode;

And the dry drilling and production equipment is arranged in a closed space formed by the cabin body and the lower cabin cover.

2. The functional compartment of claim 1, wherein the interior of the compartment body is provided with a truss structure to improve the structural strength of the functional compartment.

3. Functional compartment according to claim 2, characterized in that the truss structure comprises a plurality of i-shaped steel bars arranged in a grid-like or in the same plane parallel to each other.

4. Functional compartment according to any of claims 1-3, characterised in that the inner wall of the compartment body is provided with first stiffening ribs in the circumferential direction.

5. The functional compartment according to any one of claims 1 to 3, wherein the cabin body and the lower deck lid are connected by a bolt connection structure.

6. Functional cabin according to any one of claims 1 to 3, characterized in that the side of the lower deck lid facing away from the cabin body is provided with second stiffening ribs arranged in a grid-like manner.

7. The functional compartment according to any one of claims 1 to 3, wherein the functional compartment comprises a plurality of lifting lugs arranged on the outer wall of the functional compartment, and third reinforcing ribs are arranged on two sides of the lifting lugs.

8. functional cabin according to any one of claims 1 to 3, characterized in that the side of the lower deck lid facing the cabin body is provided with a plurality of arc-shaped grips along the circumferential direction.

9. Functional cabin according to any one of claims 1-3, characterized in that the cabin body and the lower deck lid are made of high-strength steel.

10. Functional cabin according to any one of claims 1-3, characterized in that the cabin body comprises an umbilical hole.

Technical Field

The invention relates to the technical field of offshore oil engineering, in particular to a functional cabin for underwater oil and gas drilling and production.

Background

Deepwater oil and gas drilling and production relate to a plurality of complex underwater drilling and production devices, wherein the lowering installation of the devices and the underwater connection between the devices need complex processes; due to special working environment, most of underwater drilling and production equipment is wet, and compared with dry equipment, the wet equipment is more complex in structure, lower in working stability during underwater work, expensive in use cost, high in maintenance difficulty and the like. At present, some companies and colleges at home and abroad carry out related research on functional cabins, for example, a pressure cabin of the united states weather ford company is used for carrying out an electrical sealing performance test on an underwater control module under an external pressure condition, and a horizontal structure is adopted, so that the maximum water depth can be simulated by 1500 m; the 40MPa high-pressure cabin of the middle ship heavy industry research institute adopts a vertical structure, and can carry out external pressure test on a solid or a model; the construction of the deepwater pressure cabin of Tianjin university provides great convenience for the research of deepwater submarine pipeline buckling, the deepwater submarine pipeline buckling is researched in a test mode, and then a pipeline buckling control method is provided, so that reference is provided for the design of deepwater submarine pipelines.

The above research on pressure function compartments has mainly focused on simulation of actual conditions and testing of related equipment, while research on actual underwater-working function compartments is currently relatively rare. Therefore, a new functional compartment for underwater oil and gas drilling and production is needed to solve the problem that dry drilling and production equipment cannot be used underwater.

Disclosure of Invention

to the problem among the above-mentioned prior art, this application has provided a neotype function cabin for oil gas drilling under water adopts equipment to put into the deep water district under in a confined space with dry-type drilling to replace wet-type drilling equipment, carried out the drilling operation under water, improved the fail safe nature of device under water.

the application provides a function cabin for oil and gas is bored under water and is adopted, and this function cabin includes: a cabin body; the lower cabin cover is hermetically connected with the cabin body, and one side of the lower cabin cover, which is far away from the cabin body, is used for being hermetically connected with the wellhead connector; and the dry drilling and production equipment is arranged in a closed space formed by the cabin body and the lower cabin cover. The underwater functional cabin can isolate severe deep water environment, provides a relatively stable working state for dry drilling and production equipment in the cabin, improves the safety and reliability of an underwater device, and can reduce the equipment cost.

In one embodiment, the interior of the cabin body is provided with a truss structure to improve the structural strength of the functional cabin.

In one embodiment, the truss structure comprises a plurality of i-section steel bars arranged in a grid or parallel to each other in the same plane. Through this embodiment, on the one hand can strengthen the overall structure intensity of function cabin under water, on the other hand can place the steel sheet again on the plane that the billet formed to divide into the cabin body and go up the cabin body and lower cabin body, improved space utilization.

In one embodiment, the inner wall of the cabin is provided with a first reinforcement rib in the shape of a ring. Through this embodiment, can further strengthen the structural strength of cabin body, improve compressive capacity.

In one embodiment, the cabin body is connected with the lower cabin cover by adopting a bolt connection structure. Through this embodiment, can further improve the stability under water of function cabin.

In one embodiment, the side of the lower deck lid facing away from the nacelle is provided with second stiffening ribs arranged in a grid-like manner. Through this embodiment, can strengthen lower deck lid structural strength and lighten its own weight simultaneously.

In one embodiment, the cabin comprises a plurality of lifting lugs arranged on the outer wall of the cabin, and third reinforcing ribs are arranged on two sides of each lifting lug. Through this embodiment, outside cable can be through the lug and with the function cabin transfer under water, simultaneously through setting up the second strengthening rib, can strengthen being connected between lug and the cabin body, improves the stability in function cabin.

In one embodiment, the side of the lower deck lid facing the nacelle is provided with a plurality of arc-shaped fingers along the circumferential direction. Through the implementation mode, a Remote Operated Vehicle (ROV) can be stabilized by the arc-shaped gripper during working, and when the functional compartment is in butt joint with a wellhead connector and has deviation, the ROV can adjust the position of the functional compartment by gripping the gripper to complete butt joint operation.

In one embodiment, the nacelle body and said lower deck lid are made of high-strength steel. Through this embodiment, can further strengthen the structural strength of function cabin under water, increase compressive capacity.

In one embodiment, the enclosure includes an umbilical port. Through the embodiment, on one hand, a channel can be provided for the umbilical cable to provide support for electric power, signals and the like for the underwater functional cabin, and on the other hand, the umbilical cable inlet can release stress concentration generated during casting of the cabin body.

the beneficial effect of this application does: through the functional cabin for underwater oil gas drilling and production, dry drilling and production equipment for land can be put into a closed space and put into a deep water area to carry out underwater drilling and production operation, a dry environment with isolated seawater and stable structure is provided, and wet drilling and production equipment is replaced.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 is a schematic perspective cross-sectional view of a functional compartment according to an embodiment of the present invention;

FIG. 2 is a schematic view of a functional compartment according to another embodiment of the present invention;

Fig. 3 is a schematic view of a lower deck of a functional deck provided with drilling equipment according to a further embodiment of the invention;

FIG. 4 is a front view of a body of a functional compartment according to yet another embodiment of the present invention;

FIG. 5 is a top view of a body of a functional compartment according to yet another embodiment of the present invention;

FIG. 6 is a top view of a lower deck lid of a functional compartment according to yet another embodiment of the present invention;

FIG. 7 is a bottom view of a lower deck lid of a functional compartment according to yet another embodiment of the present invention;

Fig. 8 is a right side view of a lower deck lid of a functional compartment according to yet another embodiment of the present invention.

Reference numbers in the figures: 10-a functional compartment; 100-a cabin body; 110-truss structure; 111-h-section steel bars; 120-a first stiffener; 130-a lifting lug; 140-a third reinforcing rib; 150-bolted connection; 160-round steel plate; 170-umbilical cord hole; 200-lower hatch cover; 210-ROV working panel; 220-arc-shaped grippers; 230-a second reinforcing rib; 240-oil pipe sleeve; 250-a guide hole; 300-dry drilling and production equipment; 310-a dry blowout preventer; 320-an electric control cabinet; 330-liquid control cabinet; 340-oil pipe; 350-a mechanical arm; 360-dry drilling through christmas tree; 370-a booster pump; 380-a centrifuge; 390-Standby Box.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

Detailed Description

The invention will be further explained with reference to the drawings.

Fig. 1 and 2 show a perspective view and a front view, respectively, of a functional compartment 10 for subsea oil and gas drilling according to the present application. As shown in fig. 1 and 2, the functional compartment 10 includes: a cabin 100; a lower deck lid 200 sealingly connected to the hull 100 and having a side facing away from the hull 100 for connection to a wellhead connector (not shown); and a dry drilling and production apparatus 300 disposed in the closed space formed by the nacelle body 100 and the lower deck lid 200.

by the functional cabin 10, severe deep water environment can be isolated, a relatively stable working state is provided for the dry drilling and production equipment 300 in the cabin, the safety and reliability of the underwater device are improved, and the equipment cost can be reduced.

It will be appreciated that functional compartments for subsea oil and gas drilling are generally required to meet three requirements: firstly, as the functional cabin is applied to the exploitation of an oil field with the water depth of 1500m, the shell of the functional cabin needs to bear huge seawater pressure, the upper part of the functional cabin needs to be connected with a production manifold and also needs to bear huge pressure, and according to the factors, the structural bearing capacity of the shell of the functional cabin is very important; secondly, because a plurality of production devices (specifically, explained in the following text) need to be placed in the functional cabin, the devices generate a large amount of heat during production and operation, and the reasonable layout of the devices affects the overall heat dissipation capacity of the functional cabin; finally, the functional cabin is connected with a production manifold above, and the sealing problem is involved; the lower part is connected with a wellhead, which relates to the problems of wellhead pressure bearing, sealing and functional cabin fixing.

Preferably, the inner part of the cabin body 100 of the functional cabin 10 of the present application is provided with a truss structure 110 for increasing the structural strength of the cabin body 100, thereby improving the pressure resistance of the functional cabin, wherein the contact part of the truss structure 110 and the inner wall of the cabin body 100 is provided with a reinforcing rib (not shown) connected by welding.

Specifically, the truss structure 110 may be composed of a plurality of i-shaped steel bars 111, and the i-shaped steel bars 111 may be combined in various forms, for example, arranged in parallel with each other in the same plane in the cabin 100, wherein the i-shaped steel bars 111 are preferably arranged in parallel at equal intervals; or arranged in a grid within the cabin 100.

In the grid-like arrangement of embodiments, the i-section bars 111 may be in the same plane. In addition, preferably, as shown in fig. 1 and 2, the plurality of i-shaped steel bars 111 are divided into two layers, the upper layer of partial steel bars 111 are parallel to each other, the lower layer of partial steel bars 111 are parallel to each other, the upper layer of steel bars 111 and the lower layer of steel bars 111 are crossed with each other and arranged in a grid shape, and the contact surfaces of the two layers of steel bars are fixed by bolts or by welding. More preferably, the upper steel bars 111 and the lower steel bars 111 are perpendicular to each other, so that the structural strength of the nacelle 100 can be improved well.

The i-section bars 111, due to their high bending strength, in the preferred embodiment described above, arranged in parallel or vertically, due to their special construction, can be placed on the underside of the bars with robotic arms that are moved linearly over the bars, improving the maneuverability of the drilling and production equipment.

As shown in fig. 1 and 2, in order to further reinforce the structural strength of the nacelle 110, it is preferable that a plurality of first reinforcing beads 120 are provided on the inner wall of the nacelle 100 along the circumferential direction thereof. The cross section of the first reinforcing rib 120 along the length direction of the cabin body may be in various shapes, such as a rectangle, a triangle, or a trapezoid, and the invention is not limited thereto. In the rectangular embodiment, the first reinforcing rib 120 protrudes from the inner wall of the cabin 100 by a length of 200mm, and has a thickness of 50 mm. The plurality of first reinforcing ribs 120 may be uniformly distributed on the inner wall of the cabin body, so that each part of the cabin body 100 has the same structural strength, and the structural stability of the functional cabin 100 is improved.

A plurality of lifting lugs 130 are uniformly arranged on the outer wall of the cabin 100. The ground equipment may put the functional cabin 100 under water through the lifting lug 130, and meanwhile, in order to enhance the bonding firmness between the lifting lug 130 and the outer wall of the cabin 100, third reinforcing ribs 140 may be disposed at both sides of the lifting lug 130 and connected by welding.

Preferably, the number of the lifting lugs 130 is 3.

As shown in fig. 2, 4 or 5, a screw connection mechanism 150 is axially disposed at the connection between the cabin 100 and the lower deck cover 110, instead of the conventional flange connection structure, so as to achieve a sealed connection between the cabin 100 and the lower deck cover 200. Because must need add the strengthening rib and strengthen the flange when setting up the flange, transfer the in-process at the cabin body, the outside outstanding strengthening rib of cabin body can receive the impact of nonlinear wave current, makes the cabin body transfer the process very unstable, nevertheless uses novel bolted connection structure 150, and cabin body surface is continuous type surface, and when the cabin body received wave current and assaulted, can be a relatively stable state.

Alternatively, the bolt coupling structure 150 may be provided in various manners, for example, by making the lower end portion of the nacelle 100 in an "L" shape, and coupling the bolt to the lower deck lid 200 through the protruding portion; alternatively, the lower end of the nacelle 100 may be provided with a structure having a gradually increasing wall thickness, and the bolts may be coupled to the lower deck lid 200 through the protruding portions, as shown in fig. 1, 2, or 4.

Optionally, in addition to the bolt connection structure 150, a sealing structure (not shown) may be provided at the connection between the cabin 100 and the lower deck 200 to achieve a better sealing effect, and the sealing structure may be in various forms, such as a welding layer, a sealing ring, or an adhesive layer capable of being used under high pressure and underwater environment, and the invention is not limited thereto.

Preferably, the circular steel plate 160 can be placed on the plane formed by the truss structure 110 for placing equipment, so that the truss structure 110 and the circular steel plate 160 divide the cabin body 100 into an upper layer and a lower layer together, and by applying the structure, the structural strength of the cabin body of the whole functional cabin 10 can be improved, the upper space of the functional cabin 10 can be opened up, and the space utilization rate can be improved. Alternatively, the circular steel plate 160 is preferably welded to the inner wall of the nacelle 100.

As shown in fig. 4 and 5, a plurality of umbilical holes 170 are provided on the nacelle body 100, and the umbilical holes 170 can provide a passage for an umbilical to provide power, signals, and the like for the underwater functional nacelle, and can release stress concentration generated during casting of the nacelle body. The umbilical cable can provide power for the subsea production system, provide a hydraulic channel for subsea production system control, provide chemical agent pipelines required for oil and gas field development, and transmit control signals of the upper module and subsea production system sensor data.

in the present application, the cabin 100 may have various shapes, such as a rectangular parallelepiped, a cube, or a sphere. Preferably, as shown in fig. 1, the upper part of the cabin 100 is a hemisphere with an open lower end, and the lower part is a cuboid with two open ends, and the two parts are combined together to form the cabin 100. While the lower dimension of the hull 100 should be smaller than the dimension of the lower deck lid 200 attached thereto to achieve a complete seal.

the lower deck lid 200 may be of various shapes, such as rectangular, circular or oval, with a circular shape being preferred, the diameter of the circle being approximately 6000 mm.

since the functional compartment 10 needs to be aligned and connected with the wellhead connector by means of an ROV after entering water, as shown in fig. 1, 2 or 6, the lower deck lid 200 includes an ROV working panel 210 arranged along the circumferential direction, and the ROV can control the installation of the wellhead connector through the ROV working panel 210. Meanwhile, the lower deck lid 200 preferably further includes a plurality of arc-shaped grippers 220 arranged along the circumferential direction, the underwater ROV can hold itself by gripping the arc-shaped grippers 220 during operation, and when deviation occurs during docking of the functional compartment 10 with the wellhead connector, the ROV can adjust the position of the whole functional compartment by gripping the grippers to complete docking operation.

Preferably, the number of the arc-shaped grips 220 is 3, which can reduce the weight of the lower deck lid 200 and reduce the space.

preferably, in the case where the lower deck cover 200 is circular, the curvature of the arc-shaped grip 220 is equal to that of the circular lower deck cover.

The lower deck cover 200 is required to bear the weight of not only the cabin body 100 but also all the dry drilling and production equipment 300 in the cabin, and in order to improve the structural strength of the lower deck cover and reduce the weight of the lower deck cover, a second reinforcing rib 230 shown in fig. 7 is included/arranged on the side of the lower deck cover 200 facing away from the cabin body 100 and is connected to the side of the lower deck cover 200 facing away from the cabin body 100 by welding.

Preferably, the second reinforcing beads 230 are arranged in a grid.

Oil pipe sleeves 240 (see fig. 7 and 8) are also uniformly distributed on the lower hatch cover 200 and are used for connecting with wellhead casings; there are also a plurality of guide holes 250 (see fig. 6 and 7) for cooperating with guide posts around the wellhead connector to achieve a preliminary centering action in actual engineering installation.

Preferably, in consideration of the deep water and high pressure environment of the functional compartment 10, as described above, the functional compartment 10 needs to bear a great underwater pressure, and thus the capsule body 100 and/or the lower deck lid 200 are made of high-strength steel through a casting process.

Because the overall arrangement of cabin body internal equipment has many bodies heat dissipation problem, equipment shockproof problem, equipment dead weight pressure problem, in order to solve above problem, the function cabin 10 of this application follows following principle when arranging the cabin interior equipment: the equipment is placed close to the hull of the chamber body to enhance heat transfer, the booster pump is far away from the wellhead to reduce impact on the wellhead, the equipment is symmetrically distributed with equivalent mass, and the drilling equipment is placed in the wellhead. As shown in fig. 1 and 2, the equipment in the functional compartment 10 of the present application are all land dry drilling and production equipment, and these dry drilling and production equipment 300 includes a dry blowout preventer 310, an electric control cabinet 320, a hydraulic control cabinet 330, an oil pipe 340, a robot arm 350, a dry drilling-through type christmas tree 360, a booster pump 370, a centrifuge 380, and a reserve tank 390.

As shown in fig. 1, 2 or 3, in the embodiment in which the hull 100 is divided into upper and lower hulls, an oil pipe 340, a robot arm 350, a dry drill-through christmas tree 360, a booster pump 370, a centrifuge 380, and a reserve tank 390 are disposed in the lower hull, wherein the dry drill-through christmas tree 360, the booster pump 370, the centrifuge 380, and the reserve tank 390 are disposed on the lower deck lid 200, and the dry blowout preventer 310, the electric control cabinet 320, and the hydraulic control cabinet 330 are disposed on a circular steel plate, i.e., in the upper hull. By such an equipment layout, the space utilization rate of the cabin 100 can be improved, and the principle of the equipment layout is satisfied.

Through the functional cabin for underwater oil gas drilling and production, dry drilling and production equipment for land can be put into a closed space and put into a deep water area to carry out underwater drilling and production operation, a dry environment with isolated seawater and stable structure is provided, and wet drilling and production equipment is replaced.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.