Offline root establishing device and method for offshore drilling

Abstract

The offshore drilling off-line root setting device comprises a derrick, the derrick is fixed to a drill floor face, a catwalk is installed on the front side of the drill floor face, an auxiliary iron roughneck is arranged between the catwalk and the drill floor face, the auxiliary iron roughneck is provided with a first rat hole and a second rat hole in an opposite mode, and a third rat hole is formed between the catwalk and a well mouth. A main iron roughneck is arranged on the side, close to the well mouth, of the drill floor face, and a bridge type lifting machine is installed on the derrick. The invention also discloses a method for establishing a root by using the root establishing device. According to the offshore drilling off-line root establishing device and method, the problem that top drive drilling operation and off-line root establishing operation of a single-derrick drilling system cannot be carried out at the same time is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of marine petroleum machinery and equipment, and in particular relates to an off-line root establishment device for marine drilling, and also relates to a root establishment method using the root establishment device. Background Art

[0002] In the field of offshore drilling, traditional drilling systems for fixed drilling platforms, mobile drilling vessels / platforms, and semi-submersible drilling platforms usually use a single derrick, a rotation system, and a lifting system. Although they are equipped with pipe handling equipment such as top drives, automated catwalks, iron roughnecks, and pipe handling manipulators to reduce the labor intensity of operators, top drive drilling operations and root establishment cannot be carried out simultaneously because the root establishment operation occupies the wellhead. Root stands must be established according to the well depth before drilling and placed in the drill platform root box. This not only reduces drilling efficiency and prolongs the drilling cycle, but also increases drilling costs.

[0003] Currently, the most advanced semi-submersible drilling platforms and drillships, both domestically and internationally, primarily utilize dual-derrick or primary-auxiliary derrick drilling systems. By adding a hoisting system and tubing handling equipment, the auxiliary drilling system can pre-connect casing, drill pipe, and disassemble drilling tools while the primary drilling system is performing riser lowering and drilling operations, thereby improving operational efficiency. However, the tower-type derricks of these drilling systems are heavy, occupy variable loads, and require additional drilling equipment, limiting their practical application and resulting in high construction investment costs. Summary of the Invention

[0004] The purpose of the present invention is to provide an off-line root establishment device for marine drilling, which solves the problem that the top drive drilling operation and the off-line root establishment operation of a single derrick drilling system cannot be carried out simultaneously.

[0005] Another object of the present invention is to provide a rooting method using the rooting apparatus.

[0006] The technical solution adopted by the present invention is to establish a root device for marine drilling offline, including a derrick, which is fixed on the drilling floor, a catwalk is installed on the front side of the drilling floor, an auxiliary iron roughneck is provided between the catwalk and the drilling floor, ratholes No. 1 and No. 2 are provided opposite the auxiliary iron roughneck, rathole No. 3 is provided between the catwalk and the wellhead, a main iron roughneck is provided on the side of the drilling floor close to the wellhead, and a bridge crane is installed on the second-level platform finger beam of the derrick.

[0007] The present invention is also characterized in that:

[0008] The bridge crane includes a crane winch, an electric drive moving device, a transverse sliding guide rail, a longitudinal sliding guide rail and a bridge crane control box. The bridge crane control box controls the electric drive moving device through wires to drive the crane winch to slide on the transverse sliding guide rail and the longitudinal sliding guide rail.

[0009] The bridge crane is equipped with a wire rope, and the end of the wire rope away from the bridge crane is provided with a lifting wire or an elevator.

[0010] Another technical solution adopted by the present invention is a method for establishing a root using a root establishment device, comprising the following steps:

[0011] Step 1. Use a bridge crane to hoist the first drill pipe into rathole No. 1;

[0012] Step 2. Use a bridge crane to hoist the second drill pipe into rathole II;

[0013] Step 3. Use a bridge crane and auxiliary iron roughneck to connect the third drill rod to the first drill rod to form a column;

[0014] Step 4. Use a bridge crane and auxiliary iron roughneck to connect the column formed in step 3 with the second drill pipe to establish the first stand;

[0015] Step 5. Use a bridge crane to hoist the first stand formed in step 4 into the stand box;

[0016] Step 6. Repeat steps 1-5 to build more root stands.

[0017] Another technical solution of the present invention is also characterized in that:

[0018] The specific process of step 1 is: use the bridge crane to move to a position close to the catwalk, lower the bridge crane wire rope to lift the first drill rod from the catwalk into rathole No. 1.

[0019] The specific process of step 2 is: use the bridge crane to move to a position close to the catwalk, lower the bridge crane wire rope to lift the second drill rod from the catwalk into rathole No. 2.

[0020] The specific process of step 3 is: use the bridge crane to move to a position close to the catwalk, lower the bridge crane wire rope to lift the third drill rod from the catwalk to the top of rathole No. 1, use the auxiliary iron driller to buckle it up, and complete the docking.

[0021] The specific process of step 4 is: use the bridge crane to move to the position of rat hole No. 1, lower the bridge crane wire rope to lift the column out of rat hole No. 1 and move it horizontally to the top of rat hole No. 2, use the auxiliary iron driller to buckle it up to complete the docking.

[0022] The specific process of step 5 is: use the bridge crane to move to the position of rat hole No. Ⅱ, lower the bridge crane wire rope to lift the first stand out of rat hole No. Ⅱ, and put it into the stand box.

[0023] The beneficial effects of the present invention are:

[0024] The offshore drilling offline root establishment device and method provided by the present invention can maintain the structure of the derrick, second-layer platform and other structural types of the traditional offshore drilling platform drilling system, and do not need to add pipe arrangement devices, second-layer platform manipulators and other equipment. Only an auxiliary iron roughneck is added to the drilling floor. Through the cooperation of the second-layer bridge crane, No. 1 rathole and No. 2 rathole, while the existing drilling top drive occupies the wellhead for drilling, the offline root establishment operation is realized, thereby improving the pipe string processing efficiency, saving the root establishment time, shortening the drilling cycle, and reducing the drilling operation cost, and the overall equipment procurement cost is low, with considerable economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the off-line root establishment device for marine drilling of the present invention;

[0026] Figure 2 yes Figure 1 A top view of

[0027] Figure 3 Schematic diagram of the structure of the bridge crane of the offshore drilling off-line root establishment device of the present invention;

[0028] Figure 4 is a schematic diagram of step 1 of a rooting method using a rooting device according to the present invention;

[0029] Figure 5 is a schematic diagram of step 2 of the root establishment method using the root establishment device of the present invention;

[0030] Figure 6 is a schematic diagram of step three of the rooting method using the rooting device of the present invention;

[0031] Figure 7 2 is a schematic diagram of step 4 of the rooting method using the rooting device of the present invention.

[0032] In the figure, 1. Catwalk, 2. Auxiliary iron roughneck, 3. Main iron roughneck, 4. Rathole No. I, 5. Rathole No. II, 6. Rathole No. III, 7. Bridge crane, 8. Derrick, 9. Crane winch, 10. Electric drive moving device, 11. Transverse sliding guide rail, 12. Longitudinal sliding guide rail, 13. Bridge crane control box. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The present invention provides an off-line root establishment device for marine drilling, such as Figure 1 As shown, it includes a derrick 8, which is fixed on the drilling floor. A catwalk 1 is installed on the front side of the drilling floor. An auxiliary iron roughneck 2 is provided between the catwalk 1 and the drilling floor. Figure 2As shown, the auxiliary roughneck 2 is opposite to ratholes No. 1 and No. 2, and ratholes No. 3 6 is provided between the catwalk 1 and the wellhead. A main roughneck 3 is provided on the side of the drilling floor near the wellhead. A bridge crane 7 is installed on the second-level finger beam of the derrick 8 for hoisting the drill rods placed on the catwalk 1 in front of the drilling floor into and out of the ratholes. The auxiliary roughneck 2 is used for joint connection between the two drill rods, and the main roughneck 3 is located near the center of the wellhead for drilling and breaking out joints. Figure 2 As shown, the bridge crane 7 includes a crane winch 9, an electric drive moving device 10, a transverse sliding guide rail 11, a longitudinal sliding guide rail 12 and a bridge crane control box 13. The bridge crane control box 13 controls the electric drive moving device 10 through a wire, and the motor drives the gear mechanism to drive the crane winch 9 to slide on the transverse sliding guide rail 11 and the longitudinal sliding guide rail 12; the bridge crane 7 is provided with a wire rope, and the end of the wire rope away from the bridge crane 7 is provided with a lifting wire or a lifting card. The crane winch 9 is driven by a hydraulic motor to rotate the drum to lower or retract the wire rope for lifting the drill pipe.

[0035] The present invention uses a root establishment device to establish a root method, comprising the following steps:

[0036] Step 1. Use the bridge crane 7 to hoist the first drill rod into the rat hole 4, as shown in the following figure: Figure 4 As shown;

[0037] The specific process of step 1 is as follows: use the bridge crane 7 to move to a position close to the catwalk 1, lower the bridge crane 7 wire rope to lift the first drill rod from the catwalk 1 into the rat hole 4 No. 1;

[0038] Step 2. Use the bridge crane 7 to hoist the second drill pipe into the rat hole 5, as shown in the following figure: Figure 5 As shown;

[0039] The specific process of step 2 is as follows: use the bridge crane 7 to move to a position close to the catwalk 1, lower the wire rope of the bridge crane 7 to lift the second drill pipe from the catwalk 1 into the rat hole 5 No. II;

[0040] Step 3. Use the bridge crane 7 and the auxiliary iron roughneck 2 to connect the third drill rod with the first drill rod to form a column, as shown in FIG. Figure 6 As shown;

[0041] The specific process of step 3 is as follows: use the bridge crane 7 to move to a position close to the catwalk 1, lower the bridge crane 7 wire rope to lift the third drill pipe from the catwalk 1 to the top of the No. 1 rathole 4, use the auxiliary iron roughneck 2 to make it up, and complete the docking;

[0042] Step 4. Use the bridge crane 7 and the auxiliary iron roughneck 2 to connect the column formed in step 3 with the second drill pipe to establish the first root. Figure 7 As shown;

[0043] The specific process of step 4 is as follows: use the bridge crane 7 to move to the position of rat hole 1 4, lower the wire rope of the bridge crane 7 to lift the column out of rat hole 1 4 and move it horizontally to the top of rat hole 2 5, use the auxiliary iron roughneck 2 to make it buckle up and complete the docking;

[0044] Step 5. Use the bridge crane 7 to hoist the first stand formed in step 4 into the stand box;

[0045] The specific process of step 5 is as follows: use the bridge crane 7 to move to the position of rat hole 5 No. II, lower the wire rope of the bridge crane 7 to lift the first stand from rat hole 5 No. II, put it into the stand box, move it to the designated position of the stand box, place the lower part of the first stand on the stand box, and place the upper part of the first stand in the second-floor platform finger beam;

[0046] Step 6. Repeat steps 1-5 to build more root stands.

[0047] Example 1

[0048] The offshore drilling offline root device proposed in this embodiment is as follows: Figure 1 As shown, it includes a derrick 8, which is fixed on the drilling floor. A catwalk 1 is installed on the front side of the drilling floor. An auxiliary iron roughneck 2 is provided between the catwalk 1 and the drilling floor. Figure 2 As shown, the auxiliary iron roughneck 2 is opposite to rathole No. Ⅰ 4 and rathole No. Ⅱ 5, rathole No. Ⅲ 6 is provided between the catwalk 1 and the wellhead, the main iron roughneck 3 is provided on the side of the drilling platform close to the wellhead, and a bridge crane 7 is installed on the second-level platform finger beam of the derrick 8.

[0049] Example 2

[0050] The offshore drilling offline root device proposed in this embodiment is as follows: Figure 1 As shown, it includes a derrick 8, which is fixed on the drilling floor. A catwalk 1 is installed on the front side of the drilling floor. An auxiliary iron roughneck 2 is provided between the catwalk 1 and the drilling floor. Figure 2 As shown, the auxiliary iron roughneck 2 is opposite to rathole No. 1 4 and rathole No. 2 5, rathole No. 3 6 is provided between the catwalk 1 and the wellhead, a main iron roughneck 3 is provided on the side of the drilling platform close to the wellhead, and a bridge crane 7 is installed on the second-floor finger beam of the derrick 8; the bridge crane 7 includes a crane winch 9, an electric drive moving device 10, a transverse sliding guide rail 11, a longitudinal sliding guide rail 12 and a bridge crane control box 13. The bridge crane control box 13 controls the electric drive moving device 10 through wires to drive the crane winch 9 to slide on the transverse sliding guide rail 11 and the longitudinal sliding guide rail 12.

[0051] Example 3

[0052] The offshore drilling offline root device proposed in this embodiment is as follows: Figure 1As shown, it includes a derrick 8, which is fixed on the drilling floor. A catwalk 1 is installed on the front side of the drilling floor. An auxiliary iron roughneck 2 is provided between the catwalk 1 and the drilling floor. Figure 2 As shown, the auxiliary iron roughneck 2 is provided with rathole No. Ⅰ 4 and rathole No. Ⅱ 5, a rathole No. Ⅲ 6 is provided between the catwalk 1 and the wellhead, a main iron roughneck 3 is provided on the side of the drilling floor near the wellhead, and a bridge crane 7 is installed on the second-level platform finger beam of the derrick 8; Figure 2 As shown, the bridge crane 7 includes a crane winch 9, an electric drive moving device 10, a transverse sliding guide rail 11, a longitudinal sliding guide rail 12 and a bridge crane control box 13. The bridge crane control box 13 controls the electric drive moving device 10 through wires to drive the crane winch 9 to slide on the transverse sliding guide rail 11 and the longitudinal sliding guide rail 12; the bridge crane 7 is equipped with a wire rope, and a lifting wire or a lifting card is provided at the end of the wire rope away from the bridge crane 7.

[0053] Example 4

[0054] The method for establishing a root using the root establishment device proposed in this embodiment includes the following steps:

[0055] Step 1. Use the bridge crane 7 to hoist the first drill rod into the rat hole 4, as shown in the following figure: Figure 4 As shown;

[0056] The specific process of step 1 is as follows: use the bridge crane 7 to move to a position close to the catwalk 1, lower the bridge crane 7 wire rope to lift the first drill rod from the catwalk 1 into the rat hole 4 No. 1;

[0057] Step 2. Use the bridge crane 7 to hoist the second drill pipe into the rat hole 5, as shown in the following figure: Figure 5 As shown;

[0058] The specific process of step 2 is as follows: use the bridge crane 7 to move to a position close to the catwalk 1, lower the wire rope of the bridge crane 7 to lift the second drill pipe from the catwalk 1 into the rat hole 5 No. II;

[0059] Step 3. Use the bridge crane 7 and the auxiliary iron roughneck 2 to connect the third drill rod with the first drill rod to form a column, as shown in FIG. Figure 6 As shown;

[0060] The specific process of step 3 is as follows: use the bridge crane 7 to move to a position close to the catwalk 1, lower the bridge crane 7 wire rope to lift the third drill pipe from the catwalk 1 to the top of the No. 1 rathole 4, use the auxiliary iron roughneck 2 to make it up, and complete the docking;

[0061] Step 4. Use the bridge crane 7 and the auxiliary iron roughneck 2 to connect the column formed in step 3 with the second drill pipe to establish the first root. Figure 7 As shown;

[0062] The specific process of step 4 is as follows: use the bridge crane 7 to move to the position of rat hole 1 4, lower the wire rope of the bridge crane 7 to lift the column out of rat hole 1 4 and move it horizontally to the top of rat hole 2 5, use the auxiliary iron roughneck 2 to make it buckle up and complete the docking;

[0063] Step 5. Use the bridge crane 7 to hoist the first stand formed in step 4 into the stand box;

[0064] The specific process of step 5 is as follows: use the bridge crane 7 to move to the position of the No. II rat hole 5, lower the wire rope of the bridge crane 7 to lift the first stand out of the No. II rat hole 5 and place it in the stand box;

[0065] Step 6. Repeat steps 1-5 to build more root stands.

Claims

1. Offline root device for offshore drilling, characterized in that, The invention comprises a derrick (8), wherein the derrick (8) is fixed on a drilling platform, a catwalk (1) is installed on the front side of the drilling platform, an auxiliary iron driller (2) is provided between the catwalk (1) and the drilling platform, a rat hole No. Ⅰ (4) and a rat hole No. Ⅱ (5) are provided opposite to the auxiliary iron driller (2), a rat hole No. Ⅲ (6) is provided between the catwalk (1) and the wellhead, a main iron driller (3) is provided on the side of the drilling platform close to the wellhead, and a bridge crane (7) is installed on the second-floor platform finger beam of the derrick (8).

2. The offshore drilling offline root establishment device according to claim 1, characterized in that: The bridge crane (7) includes a crane winch (9), an electric drive moving device (10), a transverse sliding guide rail (11), a longitudinal sliding guide rail (12) and a bridge crane control box (13). The bridge crane control box (13) controls the electric drive moving device (10) through a wire to drive the crane winch (9) to slide on the transverse sliding guide rail (11) and the longitudinal sliding guide rail (12).

3. The offshore drilling offline root establishment device according to claim 2, characterized in that: The bridge crane (7) is provided with a steel wire rope, and one end of the steel wire rope away from the bridge crane (7) is provided with a lifting wire or an elevator.

4. Offline root establishment method for offshore drilling, characterized in that: The method of using the offshore drilling offline root establishment device as claimed in claim 3 comprises the following steps: Step 1. Use a bridge crane (7) to hoist the first drill rod into rat hole No. 1 (4); Step 2. Use the bridge crane (7) to hoist the second drill pipe into rat hole II (5); Step 3. Use the bridge crane (7) and the auxiliary iron roughneck (2) to connect the third drill rod to the first drill rod to form a column; Step 4. Use the bridge crane (7) and the auxiliary iron roughneck (2) to connect the column formed in step 3 with the second drill pipe to establish the first stand; Step 5. Use a bridge crane (7) to hoist the first stand formed in step 4 into the stand box; Step 6. Repeat steps 1-5 to build more root stands.

5. The method for establishing roots offline in marine drilling according to claim 4, characterized in that: The specific process of step 1 is: using a bridge crane (7) to move to a position close to the catwalk (1), lowering the bridge crane (7) wire rope to lift the first drill rod from the catwalk (1) into the No. 1 rat hole (4).

6. The method for establishing roots offline in marine drilling according to claim 4, characterized in that: The specific process of step 2 is: using the bridge crane (7) to move to a position close to the catwalk (1), lowering the bridge crane (7) wire rope to lift the second drill rod from the catwalk (1) into the No. II rat hole (5).

7. The method for establishing roots offline in marine drilling according to claim 4, characterized in that: The specific process of step 3 is as follows: using the bridge crane (7) to move to a position close to the catwalk (1), lowering the wire rope of the bridge crane (7) to lift the third drill rod from the catwalk (1) into the position just above the No. 1 rathole (4), and using the auxiliary iron driller (2) to buckle it up to complete the docking.

8. The method for establishing roots offline in marine drilling according to claim 4, characterized in that: The specific process of step 4 is as follows: using a bridge crane (7) to move to the position of rat hole No. 1 (4), lowering the wire rope of the bridge crane (7) to lift the column out of rat hole No. 1 (4) and horizontally move it to the top of rat hole No. 2 (5), and using an auxiliary iron driller (2) to buckle it up to complete the docking.

9. The method for establishing roots offline in marine drilling according to claim 4, characterized in that: The specific process of step 5 is: using a bridge crane (7) to move to the position of rat hole No. II (5), lowering the wire rope of the bridge crane (7) to lift the first stand out from rat hole No. II (5) and put it into the stand box.

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