Derrick installation construction method

Abstract

The invention relates to a derrick installation construction method, which is suitable for a shallow well drilling machine and a workover rig with relatively high moving frequency, in particular to equipment adopting a sleeved derrick, and can remarkably improve the disassembly and assembly efficiency, reduce the hoisting cost and reduce the transport vehicle times. A well drilling winch lifts a derrick bottom section and a derrick top section through a propeller strut, and other sections of the derrick are lifted through the well drilling winch; the method has the following advantages that only one small-tonnage hoisting device is needed for hoisting, and the hoisting cost is low; the crown block, the traveling block, the drilling steel wire rope and the derrick top section are integrally mounted and transported, and the dismounting and mounting efficiency is high; the derrick bottom section and the derrick top section are horizontally hoisted, no overturning operation is needed, and safety is high.

Description

Technical Field

[0001] The invention relates to the technical field of drilling and well repairing equipment in oil and gas exploitation, and in particular to a derrick installation construction method. Background Art

[0002] At present, when installing an upright set derrick, large-tonnage lifting equipment is needed to flip the bottom section and the top section of the derrick from a horizontal state to a vertical state and install them on the base. The overhead crane, traveling block and drilling wire rope need to be disassembled from the top section of the derrick and transported separately, resulting in high lifting costs and low disassembly and installation efficiency.

[0003] The main problems of the prior art are: 1. At least two lifting devices are required for flipping, and one of the lifting devices requires a large lifting capacity; 2. There are many transport vehicles and the disassembly and installation efficiency is low. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a derrick installation construction method, which only requires a relatively small tonnage lifting equipment for lifting, can significantly improve the disassembly and installation efficiency, reduce the lifting cost, and reduce the number of transport vehicles.

[0005] The technical solution adopted by the present invention is: a derrick installation construction method, characterized in that it includes the following steps:

[0006] S1. Install the derrick support legs, rotating cathead, drilling winch and bracket on the base, install the buffer cylinder in the herringbone frame on the ground, use the lifting equipment to vertically install the herringbone frame on the derrick support legs, and fix it with a pin shaft;

[0007] S2. After assembling the derrick bottom section and all its accessories on the ground, hoist the derrick bottom section as a whole horizontally to the drilling floor, connect the tail end to the derrick support foot on the base, and place the middle part on the bracket;

[0008] S3, hoist the top section of the derrick horizontally and fit it into the bottom section of the derrick, and use locking pins to fix the top section of the derrick in the bottom section of the derrick;

[0009] S4, install pulley block I, pulley block II and lifting rope, one end of the lifting rope is fixed on the herringbone frame, and the other end is connected to the drilling winch, and the lifting rope passes through the pulley to avoid the herringbone frame structure;

[0010] S5. Use the drilling winch to rotate the derrick base and the derrick top section counterclockwise. When they are close to the upright position, use the buffer cylinder to stabilize them and fix the herringbone frame and the derrick bottom section.

[0011] S6, hoist the derrick section III horizontally, and hang the derrick section III at the lower part of the derrick top section;

[0012] S7, release the wire rope in the rotating cathead and connect it to the lower part of the derrick section III, take out the pulley block I from the herringbone frame, and lower the pulley block I to the vicinity of the base table;

[0013] S8. Use the rotating cathead to pull the derrick section III to an upright state, and install the connecting pin between the derrick section III and the derrick top section, and connect the pulley block I to the lower end of the derrick section III;

[0014] S9, start the drilling winch to suspend the derrick top section and derrick section III, open the lock pin, release the fixation between the derrick top section and the herringbone frame, and close the lock pin when the drilling winch lifts the derrick section III to the specified position. The lock pin fixes the derrick top section and derrick section III on the herringbone frame;

[0015] S10, hoisting and lifting the derrick section II, the steps are the same as the installation of the derrick section III;

[0016] S11. Hoist and lift the derrick section I, following the same steps as the installation of the derrick section III; complete the installation of the derrick main body.

[0017] The beneficial effects achieved by the present invention are as follows: the present invention is suitable for medium and shallow well drilling rigs and workover rigs with a high relocation frequency, especially for equipment using a set derrick, which can significantly improve the efficiency of dismantling and installation, reduce the hoisting cost, and reduce the number of transportation vehicles; the present invention uses a drilling winch to lift the bottom section and the top section of the derrick through a herringbone frame, and the remaining sections of the derrick are lifted by the drilling winch; the present invention has the following advantages:

[0018] 1. Only a small tonnage lifting equipment is needed for lifting, and the lifting cost is low;

[0019] 2. The overhead crane, traveling block, drilling wire rope and top section of the derrick are installed and transported in an integrated manner, with high installation and disassembly efficiency;

[0020] 3. The bottom section and top section of the derrick are hoisted horizontally without flipping operation, which is highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1-11 It is a schematic diagram of the installation of the derrick of the present invention;

[0022] In the figure: 1. A-frame; 2. Bottom section of derrick; 3. Section I of derrick; 4. Section II of derrick; 5. Section III of derrick; 6. Top section of derrick; 7. derrick legs; 8. Buffer cylinder; 9. Rotating cathead; 10. Drilling winch; 11. Base; 12. Bracket; 13. Locking pin; 14. Pulley block I; 15. Pulley block II; 16. Hoisting rope; 17. Pulley; 18. Wire rope; 19. Connecting pin shaft; 20 Second-level platform. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] A derrick installation construction method of the present invention is characterized by comprising the following steps:

[0026] S1, such as Figure 1 As shown, the derrick support leg 7, the rotating cathead 9, the drilling winch 10 and the bracket 12 are installed on the base 11, the buffer cylinder 8 is installed in the herringbone frame 1 on the ground, and the herringbone frame 1 is vertically installed on the derrick support leg 7 using a lifting device and fixed with a pin shaft;

[0027] S2, such as Figure 2 As shown, after assembling the derrick bottom section 2 and all accessories on the derrick bottom section 2 on the ground, the derrick bottom section 2 is hoisted horizontally as a whole to the drilling floor, the tail of the derrick bottom section 2 is connected to the derrick support leg 7 on the base 11, and the middle part is placed on the bracket 12;

[0028] S3, such as Figure 3 As shown, the derrick top section 6 is hoisted horizontally and fitted with the derrick bottom section 2, and the derrick top section 6 is fixed in the derrick bottom section 2 using a locking pin 13;

[0029] S4, such as Figure 4 As shown, pulley block I 14, pulley block II 15 and hoisting rope 16 are installed, one end of the hoisting rope 16 is fixed on the herringbone frame 1, and the other end is connected to the drilling winch 10, and the hoisting rope 16 avoids the herringbone frame structure through the wheel 17;

[0030] S5, such as Figure 5 As shown, the drilling winch 10 is used to rotate the derrick base 2 and the derrick top section 6 counterclockwise around the pin shaft on the derrick support leg 7. When the derrick base 2 and the derrick top section 6 are rotated to a nearly upright position, the buffer cylinder 8 is used to steadily position the herringbone frame 1 and the derrick bottom section 2;

[0031] S6, such as Figure 6 As shown, the derrick section III 5 is hoisted horizontally, and the derrick section III 5 is hung at the lower part of the derrick top section 6;

[0032] S7, such as Figure 7 As shown, the wire rope 18 in the rotating cathead 9 is released and connected to the lower part of the derrick section III 5, the pulley block I14 is removed from the herringbone frame 1, and the pulley block I14 is lowered to the vicinity of the base 11 table;

[0033] S8, such as Figure 8 As shown, the rotating cathead 9 is used to pull the derrick section III 5 to an upright state (the derrick section III 5 is connected to the bottom of the derrick top section 6), and the connecting pin 19 between the derrick section III 5 and the derrick top section 6 is installed, and the pulley block I 14 is connected to the lower end of the derrick section III 5;

[0034] S9, such as Fig. 9 As shown, the drilling winch 10 is started to suspend the derrick top section 6 and the derrick section III 5, and the locking pin 13 is opened to release the fixation of the derrick top section 6 and the herringbone frame 1. When the drilling winch 10 lifts the derrick section III 5 to the specified position through the lifting rope 16 and the pulley block, the locking pin 13 is closed, and the locking pin 13 fixes the derrick top section 6 and the derrick section III 5 on the herringbone frame 1;

[0035] S10, such as Fig.10 As shown, hoisting and lifting the derrick II section 4, the steps are the same as the installation of the derrick III section 5 (i.e., steps S6-S9);

[0036] S11, such as Fig.11 As shown, the derrick section I 3 is hoisted and lifted, and the steps are the same as the installation of the derrick section III 5 (ie, steps S6-S9); the installation of the derrick body is completed.

[0037] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims.

[0038] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A derrick installation construction method, characterized in that: The following steps are involved: S1. Install the derrick support leg, rotating cathead, drilling winch and bracket on the base, with the rotating cathead and drilling winch arranged on one side of the derrick support leg and the bracket arranged on the other side of the derrick support leg; after installing the buffer cylinder in the herringbone frame on the ground, use the lifting equipment to vertically install the herringbone frame on the derrick support leg and fix it with a pin shaft; S2. After assembling the derrick bottom section and its accessories on the ground, hoist the derrick bottom section as a whole horizontally to the drilling floor, connect the tail end to the derrick support foot on the base, and place the middle part on the bracket; S3, hoist the top section of the derrick horizontally and fit it into the bottom section of the derrick, and use locking pins to fix the top section of the derrick in the bottom section of the derrick; S4. Install the pulley assembly and the hoisting rope. One end of the hoisting rope is fixed on the herringbone frame, and the other end passes through the pulley assembly and is connected to the drilling winch; S5. Use the drilling winch to drive the derrick base and the derrick top section to rotate around the derrick support feet to an upright position, and fix the herringbone frame to the derrick bottom section; S6. Horizontally hoist the derrick section III and hang the derrick section III at the lower part of the derrick top section; S7. Release the wire rope in the rotating cathead and connect it to the lower part of the derrick section III. Take out the pulley block I from the herringbone frame and lower the pulley block I to the vicinity of the base table. S8. Use the rotating cathead to pull the derrick section III to an upright state, and install the connecting pin between the derrick section III and the derrick top section, and connect the pulley block I to the lower end of the derrick section III; S9, start the drilling winch to suspend the derrick top section and derrick section III, open the lock pin, release the fixation between the derrick top section and the herringbone frame, and close the lock pin when the drilling winch lifts the derrick section III to the specified position. The lock pin fixes the derrick top section and derrick section III on the herringbone frame; S10, repeat steps S6-S9, hoist and lift the derrick section II and derrick section I in sequence, and complete the installation of the derrick main body.

2. The derrick installation construction method according to claim 1, characterized in that: A buffer oil cylinder is installed on the upper part of the herringbone frame.

3. The derrick installation construction method according to claim 2, characterized in that: In step S5, the drilling winch is used to drive the derrick base and the derrick top section to rotate around the derrick support legs as a whole. When approaching the upright position, a buffer cylinder is used to steadily put them into place.

4. The derrick installation construction method according to claim 1, characterized in that: The pulley assembly comprises a pulley block I and a pulley block II, wherein the pulley block I is mounted on the top of the herringbone frame and the pulley block II is mounted on the top of the bottom section of the derrick; one end of the lifting rope is fixed on the herringbone frame, and the other end is connected to the drilling winch after passing through the pulley block II and the pulley block I in sequence.

5. The derrick installation construction method according to claim 4, characterized in that: The pulley assembly also includes a passing wheel, which is installed on the top of the herringbone frame, and the lifting rope passes through the passing wheel to avoid the herringbone frame.

6. The derrick installation construction method according to claim 1, characterized in that: A two-layer platform is installed on the upper part of the derrick section II.

7. The derrick installation construction method according to claim 1, characterized in that: Suitable for upright set derrick.

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