Method for installing a sea rig module base diagonal brace

Abstract

The application discloses a method for installing a diagonal bracing rod of a marine drilling rig module base. In order to realize offshore installation of a diagonal bracing pipe of a marine drilling rig module, a first guide slide and a guide pulley are arranged on a top frame of the drilling rig module base in advance, a supporting base, a second guide slide and other facilities are fixed on a bottom base, and the diagonal bracing rod is installed at two ends thereof by selecting different supporting points and under the action of a sling guide rope by using the above-mentioned facilities. The application rationally utilizes temporary storage of the diagonal bracing pipe by the supporting base so as to adjust the position of the sling, limits the position of the diagonal bracing structure during movement by the guide structure, realizes offshore installation of the diagonal bracing pipe of the marine drilling rig module base in a narrow space by a single crane, solves the problem of difficulty in installation of the marine drilling rig module base structure in a narrow space, and improves the efficiency of offshore installation of the marine drilling rig module base due to simple and safe and reliable operation during the whole installation process.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of offshore drilling rig module installation and construction, and particularly relates to a method for installing an inclined strut of a base structure of an offshore drilling rig module. BACKGROUND

[0002] Offshore oil and gas development is generally divided into three stages: early exploration, middle exploitation and later production. The drilling and production equipment required in different stages is different. If all the above equipment is configured on a drilling platform, it will inevitably cause resource waste in the process of oil development, and also increase the construction cost of drilling equipment, thereby increasing the cost of offshore oil and gas development.

[0003] In order to reduce the cost of offshore oil and gas development, some oil companies make the drilling rigs on the drilling platform into modules, and meet the demand for drilling and production equipment in different stages of offshore oil and gas development through module assembly, so as to reduce the comprehensive cost in different stages of offshore oil and gas development.

[0004] However, the biggest problem of the module drilling platform in the development process is the assembly of the drilling rig module at sea. In the assembly process, multiple offshore cranes, temporary auxiliary lifting tools and a large number of installation operators are required to realize the offshore installation requirements of the drilling rig module.

[0005] Especially in the area where the drilling rig module crane cannot cover and the operation space is small, a large number of installation auxiliary tools and operators are needed.

[0006] The most difficult part of the drilling rig module assembly process is the inclined strut of the drilling rig module base. The main function of the inclined strut is to support the base structure of the drilling rig module, prevent the frame of the base structure from losing stability, and cause damage to the base structure. Two eye plates are provided on the inclined strut. One eye plate is connected with the lower eye plate of the base structure of the drilling rig module, and the other eye plate needs to be connected with the upper air eye plate of the base structure of the drilling rig module. Because the inclined strut is arranged at the middle narrow space position of the drilling rig module, the crane cannot cover the upper eye plate position of the module base, therefore, the crane cannot be normally used during the installation of the inclined strut, and multiple lifting points need to be set on the platform to realize the installation of the upper eye plate of the inclined strut by using a hand-operated hoist.

[0007] In addition, the module drilling equipment needs to be removed and transferred to another oil field for reassembly after completing the drilling and production work in an oil field. When the drilling and production are completed, the equipment needs to be removed and transferred to another oil field for reassembly. This frequent disassembly and assembly operation increases the workload of the operators, and also increases the comprehensive cost of offshore installation of the drilling rig module. Because the operation space is narrow and multiple operators are needed, the installation operation of the inclined strut in this mode has a certain risk. If the operation is not proper, it will cause injury to the personnel. SUMMARY

[0008] To address the aforementioned problems, this invention provides a method for installing diagonal braces on the base of a marine drilling rig module, aiming to achieve convenient and rapid installation of the diagonal braces while ensuring safety. The technical solution adopted is as follows:

[0009] A method for installing a diagonal brace on a marine drilling rig module base includes an overall isosceles trapezoidal drilling rig module base and a diagonal brace. The drilling rig module base has a top frame and a bottom plate. Support legs are fixed between the top frame and the bottom plate. A first eye plate is provided at the bottom center of the top frame, and second eye plates are provided at both ends of the central axis of the bottom plate. The top and bottom of the diagonal brace are connected to the first eye plate and the second eye plate, respectively.

[0010] The first eye plate has two symmetrical eye holes. A "V"-shaped stop plate is set below the first eye plate. A downward-sloping first guide slide is set between the top of the support leg and the stop plate. A guide pulley is fixed above the top of the support leg and the top of the top frame.

[0011] A support base is fixed near the second eye plate on the bottom plate. A second guide slide is fixed between the support base and the second eye plate. The support base and the second guide slide are connected.

[0012] The diagonal brace is set vertically, with a third eye plate at the top and a fourth eye plate at the bottom. A fifth eye plate is fixed to the side of the third eye plate and the main body of the plate. The eye hole of the fifth eye plate is smaller than that of the third eye plate.

[0013] The procedure for installing the diagonal brace inside the drilling rig module base is as follows:

[0014] The crane hook is connected to the third eye plate via a sling rope to lift the diagonal brace. Directly above the support base, the bottom of the diagonal brace passes through the first guide slide and is transported downwards. When the bottom of the diagonal brace is lowered to the support base, the crane is adjusted to tilt the top of the diagonal brace along the first guide slide toward the guide pulley.

[0015] At this point, the sling of the hook passes around the guide pulley and connects to the fifth eye plate. After connection, the crane lifts the diagonal brace and removes it from the support base. At this time, the bottom of the diagonal brace slides along the second guide slide towards the second eye plate. When the fourth eye plate at the bottom of the diagonal brace slides to the second eye plate, the second eye plate and the fourth eye plate are fixedly connected.

[0016] After the second and fourth eye plates are fixed, the hook releases the sling guide rope downwards. The top of the diagonal brace slides along the first guide slide towards the first eye plate. When the top of the diagonal brace stops sliding at the stop plate, the first and third eye plates are fixedly connected. After the first and third eye plates are fixed, the sling guide rope is separated from the third eye plate, and the diagonal brace on one side of the drilling rig module base is installed.

[0017] The diagonal bracing on the other side of the drilling rig module base is installed in the same way.

[0018] Furthermore, in the above-mentioned method for installing the inclined support rod of the marine drilling rig module base, the first guide slide is located directly above the second guide slide.

[0019] Furthermore, in the above-mentioned method for installing the inclined support rod of the marine drilling rig module base, the first guide slide is inclined and one end of the first guide slide stop plate is lower than the other end.

[0020] Furthermore, in the above-mentioned method for installing the diagonal brace of the marine drilling rig module base, the main body of the support base is U-shaped, and two side plates are provided inside the U-shaped main body. The distance between the two side plates is greater than the thickness of the fourth eye plate and less than the outer diameter of the diagonal brace.

[0021] Furthermore, in the above-mentioned method for installing the diagonal brace of the marine drilling rig module base, the top frame is cubic in shape, and diagonally intersecting steel pipes are installed inside the top frame.

[0022] Furthermore, in the above-mentioned method for installing the inclined strut of the marine drilling rig module base, the second guide slide is set horizontally.

[0023] Furthermore, in the above-mentioned method for installing the diagonal brace of the marine drilling rig module base, both the first guide slide and the second guide slide are composed of two parallel steel pipes. The distance between the two parallel steel pipes is greater than the thickness of the third eye plate and the fourth eye plate, but less than the outer diameter of the diagonal brace.

[0024] Furthermore, in the above-mentioned method for installing the diagonal brace of the marine drilling rig module base, the two eye holes of the first eye plate are symmetrically arranged.

[0025] Furthermore, in the above-mentioned method for installing the inclined strut of the marine drilling rig module base, there are two first guide slides, located on both sides of the first eye plate.

[0026] Furthermore, in the above-mentioned method for installing the diagonal brace of the marine drilling rig module base, there are two second guide slides, which are symmetrically arranged on both sides of the bottom plate.

[0027] The advantages of this invention are as follows:

[0028] 1. This installation scheme can meet the installation requirements of the diagonal bracing during the offshore assembly of the offshore drilling rig module, and solves the problem of difficult offshore installation of the diagonal bracing of the offshore drilling rig module;

[0029] 2. The installation scheme of this invention solves the problem of installing the diagonal bracing rods at sea in the confined space of the marine drilling rig module. At the same time, only one crane is needed to carry out the installation operation of the diagonal bracing rods of the drilling rig module at sea, which reduces the installation difficulty and saves installation costs. Attached Figure Description

[0030] Figure 1 This refers to the state in which the crane lifts the diagonal brace into the assembly position for installation during the operation of the present invention.

[0031] Figure 2 This refers to the state in which the diagonal brace is placed on the support base by the crane during the operation of the present invention.

[0032] Figure 3 This is the state in which the crane pulls the upper end of the diagonal brace into the first guide slide near the guide pulley during the operation of the present invention.

[0033] Figure 4 During the operation of this invention, the hoist's sling guide rope passes around the guide pulley and moves to the fifth eye plate;

[0034] Figure 5 This refers to the state in which the crane lifts the diagonal brace from the temporary storage seat during the operation of the present invention.

[0035] Figure 6 This refers to the connection state between the fourth eye plate and the second eye plate at the bottom of the diagonal brace during the operation of the present invention.

[0036] Figure 7 In the operation of this invention, the crane lowers the sling guide rope, and under the action of gravity, the top of the diagonal brace rotates towards the stop plate with the second eye plate pin of the bottom base as the center.

[0037] Figure 8 This refers to the state in which the third eye plate at the top of the diagonal brace is rotated to the position of the first eye plate and connected and installed with the first eye plate during the operation of the present invention.

[0038] Figure 9 This is a plan view of the bottom base and the fourth eye plate of the diagonal brace in the present invention.

[0039] Figure 10 This is a schematic diagram of the top frame structure of the present invention;

[0040] Figure 11 This is a side view of the support base structure of the present invention;

[0041] Figure 12 This is a top view of the support base structure of the present invention;

[0042] Figure 13This is a schematic diagram of the structure of the diagonal brace of the present invention placed inside the support base;

[0043] Figure 14 This is a schematic diagram of the third and fourth eye plates at both ends of the diagonal brace of the present invention;

[0044] Among them: 1-diagonal brace, 2-first eye plate, 3-guide pulley, 4-first guide slide, 5-stop plate, 6-support base, 7-second guide slide, 8-second eye plate, 9-hook, 10-outrigger, 11-sling guide rope, 12-third eye plate, 13-fourth eye plate, 14-fifth eye plate, 15-side plate. Detailed Implementation

[0045] The invention will be further described with reference to the accompanying drawings.

[0046] A method for installing the diagonal brace of a marine drilling rig module base, such as... Figure 1 As shown, the drilling module base is generally in the shape of an isosceles trapezoid and has a diagonal brace 1. The drilling module base has a top frame and a bottom plate, and a support leg 10 is fixed between the top frame and the bottom plate. Figure 10 As shown, the top frame is cubic, with diagonally intersecting steel pipes inside. A first eyeplate 2, with two symmetrically arranged eyelets, is located at the center of the bottom of the top frame. Second eyeplates 8 are located at both ends of the horizontal central axis of the bottom plate. The top and bottom of the diagonal brace are connected to the first eyeplate 2 and the second eyeplate 8, respectively. Figure 14 As shown, a third eye plate 12 is fixed to the top of the diagonal brace, and a fourth eye plate 13 is fixed to the bottom. The middle part is a steel structure of steel pipe. The first eye plate 2 is fixedly connected to the third eye plate 12, and the second eye plate 8 is fixedly connected to the fourth eye plate 13. A small fifth eye plate 14 is provided on the side of the fourth eye plate for hoisting and rotating adjustment during the installation of the diagonal brace. The fifth eye plate is fixed to the main body of the fourth eye plate, and the eye holes in the fifth eye plate are smaller than those in the fourth eye plate.

[0047] A herringbone-shaped stop plate 5 is installed below the first eye plate. A downwardly inclined first guide slide 4 is installed between the top of the support leg and the stop plate. The first guide slide is composed of two parallel steel pipes. The end of the first guide slide closer to the stop plate is lower than the other end. A guide pulley 3 is fixed directly above the top of the support leg and at the top of the top frame.

[0048] A support base 6 is fixed to the bottom plate near the second eye plate, such as... Figure 9 As shown, a second guide slide 7 is fixed between the support base and the second eye plate. The support base and the second guide slide are connected, and the first guide slide is located directly above the second guide slide. Figure 11 , 12As shown, the support base has a U-shaped main body, inside which are two side plates. The distance between the two side plates is greater than the thickness of the fourth eye plate but less than the outer diameter of the diagonal brace. The bottom of the diagonal brace is placed inside the support base as shown. Figure 13 As shown.

[0049] This invention enables the offshore installation of the inclined support pipe of an offshore drilling rig module base within a confined space using slings and with the assistance of a support base, guide frame, and guide pulleys installed on the bottom of the drilling rig module. The specific operation for the offshore installation of the inclined support pipe of the offshore drilling rig module according to this invention is as follows:

[0050] First, manufacture the aforementioned components according to the design plan.

[0051] Install the first hole plate 2 of the drilling module base to the bottom center of the top frame, and install the stop plate 5 below the first hole plate 2.

[0052] Install the first guide slide 4 between the stop plate 5 and the top of the outrigger.

[0053] Install the support base 6 onto the bottom base near the end, and then install the second guide slide.

[0054] When the offshore drilling rig module is ready to carry out drilling operations at sea, the main structure of the drilling rig module base structure is first assembled according to the design plan.

[0055] At this point, the first eye plate 2, guide pulley 3, first guide slide 4, stop plate 5, support base 6, second guide slide 7, and second eye plate 8 of the drilling rig module base are assembled and positioned together with the other components of the drilling rig module base.

[0056] When starting to install the diagonal brace tube 1, as follows Figures 1-8 As shown, firstly, one end of the sling guide rope 11 is connected to the third eye plate 12 of the inclined support pipe 1 via a shackle, and the other end is connected to the hook 9 of the crane. The inclined support pipe 1 is lifted using the hook 9 and the sling guide rope 11, and passes through the middle of the first guide slide 4 installed on the upper part of the drilling rig module base, then reaches above the support base 6. The hook 9 and the sling guide rope 11 continue to lower the inclined support pipe 1, inserting the fourth eye plate 12 of the inclined support pipe 1 between the two side upright plates of the support base 6. The crane hook 9 and the sling guide rope 11 continue to lower the inclined support pipe 1, transferring the entire weight of the inclined support pipe 1 from the crane to the support base 6.

[0057] The inclined support pipe 1 is pulled horizontally towards the guide pulley 3 by the hook 9 and the sling rope 11. At this time, the lower part of the inclined support pipe 1 is still sitting on the support base, but the upper part of the inclined support pipe 1 tilts towards the guide pulley 3 under the action of the crane until the upper part of the inclined support pipe 1 touches the end of the first guide slide below the guide pulley 3.

[0058] In order to facilitate the connection between the upper third eye plate 12 and the first eye plate 2 of the diagonal brace tube 1, the sling guide rope 11 is removed from the third eye plate 12 of the diagonal brace tube 1 in advance, and then the sling guide rope is connected to the fifth eye plate 14 through the guide pulley 3.

[0059] The hook 9 slowly pulls the sling guide 11 upwards, and the diagonal brace 1 connected to the sling guide 11 will also move upwards along with the sling guide 11 until it detaches from the support base 6.

[0060] The diagonal brace 1, detached from the support base 6, will automatically move towards the sling guide 11 under the influence of gravity. With the assistance of the second guide slide 7, the fourth eye plate 13 at the bottom of the diagonal brace 1 will automatically reach the area of ​​the second eye plate 8.

[0061] Connect the fourth eye plate 13 at the bottom of the inclined support tube 1 to the second eye plate 8 of the base plate of the drilling rig module using a pin. After the connection is completed, check and confirm that the pin connects the two eye plates together.

[0062] The hook 9 lowers the sling guide rope 11 until the weight of the diagonal brace tube is fully transferred to the second eye plate 8 through the connecting pin. The sling guide rope 11 is then lowered. Because the second eye plate 8 is positioned outside the center of gravity of the diagonal brace tube 1 during the design, the diagonal brace tube 1 will automatically tilt towards the center of gravity under the action of gravity as the crane hook is lowered.

[0063] The first eye plate 2 is designed to be located inside the center of gravity of the diagonal brace tube 1. Therefore, as the crane hook 9 continuously lowers the sling guide rope 11, the diagonal brace tube 1 will rotate towards the first eye plate 2 with the second eye plate 8 and the pin connected to it as the center. With the assistance of the first guide slide 4, the third eye plate 12 of the diagonal brace tube 1 will slowly move towards the stop plate 5.

[0064] Connect the third eye plate 12 of the inclined support pipe 1 to the first eye plate 2 of the drilling rig module base using a pin. After the two eye plates are connected, remove the crane hook 9 and the sling guide rope 11 from the fifth eye plate 14 on the inclined support pipe 1.

[0065] This completes the installation of the diagonal brace on one side of the offshore drilling rig module; the other side is installed in the same manner.

[0066] This invention makes reasonable use of the temporary storage of the inclined support tube on the support base to facilitate the position adjustment of the slings and the position restriction of the guide structure on the movement of the inclined support structure. It realizes the installation of the inclined support tube of the marine drilling rig module base in a narrow space by a single crane at sea, and solves the problem of difficult installation of the marine drilling rig module base structure in a narrow space. At the same time, because the entire installation process is simple to operate and safe and reliable, it improves the efficiency of marine drilling rig module base installation at sea.

Claims

1. A method for installing a diagonal brace on a marine drilling rig module base, characterized in that: The installation method uses a drilling module base that is an isosceles trapezoid in shape. The drilling module base has a top frame and a bottom plate. Support legs are fixed between the top frame and the bottom plate. A first eye plate is set at the bottom center of the top frame, and second eye plates are set at both ends of the central axis of the bottom plate. The top and bottom of the diagonal brace are connected to the first eye plate and the second eye plate, respectively. The first eye plate has two symmetrical eye holes. A "V"-shaped stop plate is set below the first eye plate. A downwardly inclined first guide slide is set between the top of the support leg and the stop plate. A guide pulley is fixed above the top of the support leg and the top of the top frame. A support base is fixed near the second eye plate on the bottom plate. A second guide slide is fixed between the support base and the second eye plate. The support base and the second guide slide are connected. The diagonal brace is set vertically, with a third eye plate at the top and a fourth eye plate at the bottom. A fifth eye plate is fixed to the side of the third eye plate and the main body of the plate. The eye hole of the fifth eye plate is smaller than that of the third eye plate. The procedure for installing the diagonal brace inside the drilling rig module base is as follows: The crane hook is connected to the third eye plate through the sling rope to lift the diagonal brace. Directly above the support base, the bottom of the diagonal brace passes through the first guide slide and is transported downwards. When the bottom of the diagonal brace is lowered to the support base, the crane is adjusted to tilt the top of the diagonal brace along the first guide slide toward the guide pulley. At this time, the sling of the hook passes around the guide pulley and connects to the fifth eye plate. After the connection, the crane lifts the diagonal brace and separates it from the support base. At this time, the bottom of the diagonal brace slides along the second guide slide to the second eye plate. When the fourth eye plate at the bottom of the diagonal brace slides to the second eye plate, the second eye plate and the fourth eye plate are fixedly connected. After the second and fourth eye plates are fixed, the hook releases the sling guide rope downwards, and the top of the diagonal brace slides along the first guide slide towards the first eye plate. When the top of the diagonal brace slides to the stop plate and stops, the first eye plate and the third eye plate are fixedly connected. After the first and third eye plates are fixed, the sling guide rope is separated from the third eye plate, and the diagonal brace on one side of the drilling rig module base is installed. The diagonal bracing on the other side of the drilling rig module base is installed in the same way.

2. The installation method of the diagonal brace of the marine drilling rig module base according to claim 1, characterized in that: The first guide slide is located directly above the second guide slide.

3. The method for installing a diagonal brace for a marine drilling rig module base according to claim 1, characterized in that: The first guide slide is inclined, and one end of the first guide slide stop plate is lower than the other end.

4. The installation method of the diagonal brace of the marine drilling rig module base according to claim 1, characterized in that: The main body of the support base is U-shaped, and there are two side plates inside the U-shaped main body. The distance between the two side plates is greater than the thickness of the fourth eye plate and less than the outer diameter of the diagonal brace.

5. The method for installing a diagonal brace for a marine drilling rig module base according to claim 1, characterized in that: The top frame is cubic, and diagonally intersecting steel pipes are installed inside the top frame.

6. The method for installing a diagonal brace for a marine drilling rig module base according to claim 1, characterized in that: The second guide rail is set horizontally.

7. The method for installing the diagonal brace of the marine drilling rig module base according to claim 1, characterized in that: The first and second guide tracks are each composed of two parallel steel pipes. The distance between the two parallel steel pipes is greater than the thickness of the third and fourth eye plates, but less than the outer diameter of the diagonal brace.

8. The method for installing the diagonal brace of the marine drilling rig module base according to claim 1, characterized in that: The two eyeholes of the first eyeplate are set symmetrically.

9. The method for installing a diagonal brace for a marine drilling rig module base according to claim 1, characterized in that: There are two first guide tracks, located on both sides of the first eye plate.

10. The method for installing a diagonal brace for a marine drilling rig module base according to claim 1, characterized in that: There are two second guide tracks, which are symmetrically arranged on both sides of the bottom plate.

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