Mechanical arm device for storing kelly rods in derrick and storage method thereof

Abstract

The present invention relates to a mechanical arm device and storage method for storing square drill rods in a derrick, the mechanical arm device comprises a telescopic mechanism, a rotating mechanism and a grabbing mechanism for fixing the square drill rods, the telescopic mechanism is fixedly arranged on a bracket, the bracket is hinged on the derrick; the rotating mechanism is arranged on the derrick, driving the bracket as a whole to rotate in a horizontal plane; the telescopic mechanism is connected to the grabbing mechanism through a telescopic arm, driving the grabbing mechanism to make linear motion. The present invention transfers square drill rods and swivels from the center of the wellhead to the side of the derrick, avoiding the operating space of the traveling carriage, avoiding the square drill rods and swivels occupying the drilling table space or the workload of placing the square drill rods and swivels on the ground; the present invention is particularly suitable for drilling rigs and well repair rigs with small drilling table areas and difficult to set up storage positions for square drill rods and swivels, especially well repair rigs without drilling platforms, which can greatly reduce labor intensity and improve operating efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas well drilling and production in oil and gas fields, and in particular to a mechanical arm device for storing kelly rods in a derrick and a storage method thereof. Background Art

[0002] In oil drilling rigs and workover rigs, when square drill rods and swivels are inserted into the rat holes of the drill floor, they occupy a large space on the drill floor, easily interfere with surrounding equipment, and affect the escape route of personnel. In addition, in some workover rigs, since they are not equipped with a drill floor, square drill rods and swivels must be placed on the ground when not in use, which increases the workload of operations.

[0003] In the existing method, the kelly and the faucet are inserted into the rat hole: the kelly and the faucet are lowered by the traveling block and the big hook, and the operator on the drilling table drags the lower end of the kelly to the rat hole, and the traveling block and the big hook continue to descend, and the kelly and the faucet are inserted into the rat hole;

[0004] Place the square drill rod and swivel on the ground: Place the square drill rod and swivel on the ground by using the traveling block hook and auxiliary lifting equipment.

[0005] The main problems of the existing methods are: 1. They occupy a large drilling floor space, are prone to interference with surrounding equipment, and the drilling rig and well repair rig drilling floor structure size is large; 2. They affect the escape route of personnel; 3. Rat holes need to be set in the well site foundation in advance; 4. Inserting the square drill rod into the rat hole or placing the square drill rod and the faucet on the drilling floor is labor-intensive. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a mechanical arm device and a storage method for storing square drill rods in a derrick, which can move the square drill rods and swivels from the center of the wellhead to the side of the derrick, avoiding the operating space of the traveling block, thereby avoiding the square drill rods and swivels occupying the drilling table space or the workload of placing the square drill rods and swivels on the ground.

[0007] The technical solution adopted by the present invention is: a mechanical arm device for storing square drill rods in a derrick, characterized in that it includes a telescopic mechanism, a rotating mechanism and a grasping mechanism for fixing the square drill rods, the telescopic mechanism is fixedly arranged on a bracket, and the bracket is hinged on the derrick; the rotating mechanism is arranged on the derrick, driving the bracket to rotate as a whole in a horizontal plane; the telescopic mechanism is connected to the grasping mechanism through a telescopic arm, driving the grasping mechanism to make linear motion.

[0008] Preferably, the bracket is in a right-angled triangle structure, including a vertical rod, a horizontal rod and an oblique rod; the horizontal rod is horizontally arranged, one end of which points to the center of the wellhead, and is provided with a telescopic mechanism; the telescopic mechanism is connected to one end of the telescopic arm, and the other end of the telescopic arm is connected to the grasping mechanism; the vertical rod is vertically arranged, the upper end is connected to the other end of the horizontal rod, and the lower end is connected to one end of the oblique rod; the other end of the oblique rod is connected to the horizontal rod; the horizontal rod is arranged on the derrick through a rotating pin and a rotating mechanism, and the rotating mechanism drives the horizontal rod to rotate in a horizontal plane along the rotating pin, so that the grasping mechanism moves closer to or away from the center of the wellhead.

[0009] Preferably, the rotating mechanism comprises a rotating hydraulic cylinder, the cylinder body of the rotating hydraulic cylinder is arranged on the derrick, and the piston rod is hinged to the bracket.

[0010] Preferably, a safety limit mechanism is provided between the support and the derrick to prevent the support from over-rotating.

[0011] Preferably, the telescopic mechanism comprises a telescopic hydraulic cylinder, a cylinder body of the telescopic hydraulic cylinder is fixed on a bracket, and a piston rod is connected to the telescopic arm.

[0012] Preferably, the gripping mechanism comprises a clamp head, a shift rod and a locking fluid cylinder. The clamp head is in a U-shaped structure, with an open end pointing to the wellhead center and provided with a shift rod; a closed end is connected to the telescopic arm; the locking fluid cylinder is arranged on the clamp head, driving the shift rod to open or close the opening of the clamp head

[0013] A method for storing kelly rods in a derrick, characterized in that the storage is performed by using the above-mentioned mechanical arm device, and specifically comprises the following steps:

[0014] S1. Use the traveling block and the big hook to lift the swivel and the kelly rod so that the kelly rod tray is higher than the mechanical arm device;

[0015] S2. Open the stopper at the opening of the clamp head, rotate the bracket so that the clamp head faces the center of the wellhead, and extend the telescopic arm so that the clamp head is located at the center of the Kelly;

[0016] S3, close the stopper at the opening of the clamp head, lower the traveling block so that the Kelly tray is supported on the clamp head;

[0017] S4. Untie the connection between the big hook and the swivel, and operate the bracket to carry the swivel and the square drill rod to rotate to the side inside the derrick, avoiding the space where the traveling block and the big hook run up and down along the center of the wellhead.

[0018] The beneficial effects achieved by the present invention are as follows: the present invention is particularly suitable for drilling rigs and workover rigs with a small drilling floor area and difficulty in setting up storage positions for kelly rods and swivels, especially workover rigs without a drilling floor, which can greatly reduce labor intensity and improve operating efficiency; the present invention has the following advantages:

[0019] 1. Eliminate the rat holes of traditional drilling rigs and workover rigs, saving drilling platform area and the workload of digging rat holes;

[0020] 2. Avoid the large space requirements on the derrick when the kelly rod is inserted and pulled out of the rat hole, which is conducive to the miniaturization and lightweight of the derrick structure;

[0021] 3. Light labor intensity. The rat holes for placing square drill rods on traditional drilling rigs and workover rigs are far from the wellhead and require the cooperation of multiple people to complete. This robotic arm device is remotely controlled and can be completed by one person. In addition, for workover rigs that are not equipped with a drilling platform, there is no need to place square drill rods and faucets on the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the mechanical arm device of the present invention;

[0023] Figure 2 It is a schematic diagram of the connection between the telescopic mechanism and the grasping mechanism;

[0024] Figure 3 It is a schematic diagram of the gripping mechanism when it is closed;

[0025] Figure 4 This is a schematic diagram of the gripping mechanism when it is opened;

[0026] Figure 5 It is a top view of the Kelly located at the center of the wellhead;

[0027] Figure 6 A top view of the Kelly being moved to the side of the derrick;

[0028] Figure 7 This is a front view of the Kelly located at the center of the wellhead;

[0029] Figure 8 This is a front view of the Kelly being moved to the side of the derrick;

[0030] In the figure: 1. bracket; 11. horizontal bar; 12. vertical bar; 13. oblique bar; 2. telescopic mechanism; 21. telescopic cylinder; 22. telescopic arm; 3. rotating mechanism; 4. grabbing mechanism; 41. clamp head; 42. gear lever; 43. locking cylinder; 5. derrick; 6. faucet; 7. safety limit mechanism; 8. second-level platform; 10. wellhead center; 00. mechanical arm device; 01. square drill rod; 02. square drill rod tray; 03. traveling block; 04. big hook. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] like Figure 1-8 As shown, a mechanical arm device for storing a kelly rod in a derrick of the present invention comprises a telescopic mechanism 2, a rotating mechanism 3 and a grasping mechanism 4 for fixing the kelly rod 01, wherein the telescopic mechanism 2 is fixedly arranged on a bracket 1, and the bracket 1 is hinged on a derrick 5; the rotating mechanism 3 is arranged on the derrick 5, and drives the bracket 1 to rotate as a whole in a horizontal plane; the telescopic mechanism 2 is connected to the grasping mechanism 4 through a telescopic arm 22, and drives the grasping mechanism 4 to make a linear motion.

[0034] In this embodiment, the bracket 1 is a right-angled triangle structure, including a vertical rod 12, a horizontal rod 11 and an inclined rod 13; the horizontal rod 11 is horizontally arranged, one end of which points to the wellhead center 10, and is provided with a telescopic mechanism 2; the telescopic mechanism 2 is connected to one end of the telescopic arm 22, and the other end of the telescopic arm 22 is connected to the grasping mechanism 4; the vertical rod 12 is vertically arranged, the upper end is connected to the other end of the horizontal rod 11, and the lower end is connected to one end of the inclined rod 13; the other end of the inclined rod 13 is connected to the horizontal rod 11; the horizontal rod 11 is arranged on the derrick 5 through a rotating pin and a rotating mechanism 3, and the rotating mechanism 3 drives the horizontal rod 11 to rotate in a horizontal plane along the rotating pin, so that the grasping mechanism 4 is close to or away from the wellhead center 10.

[0035] In this embodiment, the rotating mechanism 3 includes a rotating hydraulic cylinder, a cylinder body of which is disposed on the derrick 5 , and a piston rod is hinged to the bracket 1 .

[0036] In this embodiment, a safety limit mechanism 7 is provided between the support 1 and the derrick 5 to prevent the support 1 from over-rotating.

[0037] In this embodiment, the telescopic mechanism 2 includes a telescopic hydraulic cylinder 21 , a cylinder body of the telescopic hydraulic cylinder 21 is fixed on the bracket 1 , and a piston rod is connected to the telescopic arm 22 .

[0038] Combination Figure 4As shown, in this embodiment, the grabbing mechanism 4 includes a clamp head 41, a shift rod 42 and a locking fluid cylinder 43. The clamp head 41 is in a "U"-shaped structure, with an open end pointing to the wellhead center 10 and provided with a shift rod 42; a closed end is connected to the telescopic arm 22; the locking fluid cylinder 43 is arranged on the clamp head 41, and drives the shift rod 42 to open or close the opening of the clamp head 41

[0039] A telescopic arm 22 is installed in the bracket 1, and the telescopic arm 22 is telescopically moved by the telescopic hydraulic cylinder 21 as a power; a grabbing mechanism 4 is arranged at the end of the telescopic arm 22, and a blocking rod 42 is pushed by a locking hydraulic cylinder 43 to realize the opening and closing of the clamp head 41. A kelly tray 02 is installed between the faucet 6 and the kelly 01, and is used to support the kelly 01 and the faucet 6 on the tongs 41.

[0040] Combination Figure 5-8 As shown, a method for storing kelly rods in a derrick of the present invention adopts the above-mentioned mechanical arm device 00 for storage, and specifically comprises the following steps:

[0041] S1, use the traveling block 03 and the big hook 04 to lift the faucet 6 and the kelly 01, so that the kelly tray 02 is higher than the mechanical arm device 00;

[0042] S2, open the stopper 42 at the opening of the clamp head 41, rotate the bracket 1, make the clamp head 41 face the wellhead center 10, extend the telescopic arm 42 so that the clamp head 41 is located at the center of the kelly 6;

[0043] S3, close the stopper 42 at the opening of the clamp head 41, lower the traveling block 03 so that the kelly tray 02 is supported on the clamp head 41;

[0044] S4. The personnel stand on the second-floor platform to untie the connection between the big hook 04 and the faucet 6, and operate the support 1 to carry the faucet 6 and the square drill rod 01 to rotate to the side of the inside of the derrick, avoiding the space where the traveling block 03 and the big hook 04 run up and down along the wellhead center 10.

[0045] 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.

[0046] 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 mechanical arm device for storing kelly rods in a derrick, characterized in that: It includes a telescopic mechanism, a rotating mechanism and a grabbing mechanism for fixing the square drill rod. The telescopic mechanism is fixedly arranged on a bracket, and the bracket is hinged on a derrick. The rotating mechanism is arranged on the derrick to drive the bracket to rotate as a whole in a horizontal plane. The telescopic mechanism is connected to the grabbing mechanism through a telescopic arm to drive the grabbing mechanism to move linearly.

2. The mechanical arm device for storing kelly rods in a derrick according to claim 1, characterized in that: The bracket is a right-angled triangle structure, including a vertical rod, a horizontal rod and an inclined rod; the horizontal rod is horizontally arranged, one end of which points to the center of the wellhead, and is provided with a telescopic mechanism; the telescopic mechanism is connected to one end of the telescopic arm, and the other end of the telescopic arm is connected to the grasping mechanism; the vertical rod is vertically arranged, the upper end is connected to the other end of the horizontal rod, and the lower end is connected to one end of the inclined rod; the other end of the inclined rod is connected to the horizontal rod; the horizontal rod is arranged on the derrick through a rotating pin and a rotating mechanism, and the rotating mechanism drives the horizontal rod to rotate along the rotating pin in a horizontal plane, so that the grasping mechanism is close to or away from the center of the wellhead.

3. The mechanical arm device for storing kelly rods in a derrick according to claim 1, characterized in that: The rotating mechanism comprises a rotating hydraulic cylinder, a cylinder body of the rotating hydraulic cylinder is arranged on the derrick, and a piston rod is hinged to a bracket.

4. The mechanical arm device for storing kelly rods in a derrick according to claim 1, characterized in that: A safety limit mechanism is provided between the support and the derrick to prevent the support from over-rotating.

5. The mechanical arm device for storing kelly rods in a derrick according to claim 1, characterized in that: The telescopic mechanism comprises a telescopic hydraulic cylinder, a cylinder body of the telescopic hydraulic cylinder is fixed on a bracket, and a piston rod is connected to a telescopic arm.

6. The mechanical arm device for storing kelly rods in a derrick according to claim 1, characterized in that: The grabbing mechanism includes a clamp head, a shift rod and a locking fluid cylinder. The clamp head is in a "U"-shaped structure, with an open end pointing to the center of the wellhead and provided with a shift rod; the closed end is connected to the telescopic arm; the locking fluid cylinder is arranged on the clamp head and drives the shift rod to open or close the opening of the clamp head.

7. A method for storing kelly rods in a derrick, characterized in that: The storage is performed using the mechanical arm device according to any one of claims 1 to 6, specifically comprising the following steps: S1. Use the traveling block and the big hook to lift the swivel and the kelly rod so that the kelly rod tray is higher than the mechanical arm device; S2. Open the stopper at the opening of the clamp head, rotate the bracket so that the clamp head faces the center of the wellhead, and extend the telescopic arm so that the clamp head is located at the center of the Kelly; S3, close the stopper at the opening of the clamp head, lower the traveling block so that the Kelly tray is supported on the clamp head; S4. Untie the connection between the big hook and the swivel, and operate the bracket to carry the swivel and the square drill rod to rotate to the side inside the derrick, avoiding the space where the traveling block and the big hook run up and down along the center of the wellhead.

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