A modular automatic drilling rod tripping system for well repair

Abstract

The present invention discloses a modular automatic drilling rod pulling system for well repair, comprising a gripping rod mechanism, a feeding rod mechanism, a centralizer and a working platform, wherein a gripping mechanism mounting seat is arranged on the working platform, the gripping rod mechanism is arranged on the gripping mechanism mounting seat, the centralizer is arranged on the working platform, and the feeding rod mechanism is independently placed on a side close to the gripping rod mechanism. The modular automatic drilling rod pulling system for well repair provided by the present invention can realize automated operation, can realize accurate positioning of the pulling rod through modular functional combination, and the arrangement position of the drill rod box has a large adjustable space, and the construction is efficient and easy to operate.

Description

Technical Field

[0001] The invention relates to a modular automatic drilling rod tripping system for well repair, belonging to the technical field of full-automatic well repair machines. Background Art

[0002] During the well repair service of oil and gas wells, it is necessary to frequently lift and replace the drill pipe to complete the well repair operation, which is also a key task in the entire well repair work. In traditional well repair operations, the elevators that come with the well repair rig are mostly used, and the elevators are dragged to the drill pipe box by manpower, and the drill pipe is lifted and lowered by the elevators, which consumes a lot of manpower and has major safety hazards; in some oil and gas wells, there are also independent automatic rod-raising and lowering mechanisms, which are used in conjunction with traditional well repair rigs. Although they can achieve automatic operation, they are mostly separated from the working mechanism of the well repair rig, making it difficult to center the operation, and they are generally independently powered and bulky, requiring separate personnel to operate, and the actual use effect is not good. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a modular automatic drilling rod tripping and lowering system for well repairing, which can achieve precise positioning of the drilling rod tripping and lowering through a modular functional combination, and the arrangement position of the drilling rod box has a large adjustable space, efficient construction, and easy operation.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A modular automatic drilling rod tripping system for well repair comprises a rod grabbing mechanism, a rod delivery mechanism, a centralizer and a working platform. A rod grabbing mechanism mounting seat is arranged on the working platform, the rod grabbing mechanism is arranged on the rod delivery mechanism mounting seat, the centralizer is arranged on the working platform, and the rod delivery mechanism is independently placed on a side close to the rod grabbing mechanism.

[0006] The grab rod mechanism includes a rotating base, which is arranged on the grab mechanism mounting seat, one end of the main arm is hingedly connected to the rotating base, the other end of the main arm is connected to the grab arm mechanism through a swing cylinder, the middle of the main arm is hingedly connected to the bottom end of the telescopic cylinder, the telescopic ends of the telescopic cylinder are respectively hingedly connected to one end of the first swing arm and the second swing arm, the other ends of the first swing arm and the second swing arm are respectively hingedly connected to the rotating base and the main arm.

[0007] The grab arm mechanism comprises a swing rod, both ends of which are respectively provided with mechanical grippers, and the swing rod is connected to the swing cylinder via a connecting sleeve.

[0008] The mechanical gripper is an articulated structure driven by a cylinder.

[0009] The stabilizer includes a support arm, the lower end of which is connected to the working platform, a first base is fixed to the support arm, one end of the first base is connected to one end of a straightening cylinder, the other end of the first base is hingedly connected to two swing arms, the other end of the straightening cylinder is connected to a second base, one end of two connecting rods is connected to the second base, the other ends of the two connecting rods are movably connected to the ends of the two swing arms respectively, and a clamp is provided at the front end of the movable arm.

[0010] The rod delivery mechanism comprises a bracket, a drill rod box is installed on the top of the bracket, a lifting cylinder and a rod delivery mechanism are installed between the bracket and the drill rod box, and a leg cylinder is installed at the bottom of the bracket.

[0011] Beneficial effects of the present invention: The present invention provides a modular automatic drilling rod lifting and lowering system for well repair, in which a grabbing rod mechanism and a straightener are installed on a working platform of the well repair rig, and are leveled and centered together with the main machine during operation. The rod delivery mechanism is arranged according to site conditions and is placed on one side of the grabbing mechanism. Through a modular combination of functions, precise positioning of the lifting and lowering rods is achieved, and the arrangement position of the rod delivery mechanism has a large adjustable space, efficient construction, and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a modular automatic drilling rod tripping system for well repairing according to the present invention;

[0013] Figure 2 It is a structural schematic diagram of the grab bar mechanism in the present invention;

[0014] Figure 3 It is a structural schematic diagram of the mechanical gripper in the present invention;

[0015] Figure 4 It is a structural schematic diagram of the feeding rod mechanism in the present invention;

[0016] Figure 5 It is a structural schematic diagram of the centralizer in the present invention.

[0017] The reference numerals in the figure are as follows: 1-grabbing rod mechanism; 2-rod delivery mechanism; 3-straightening device; 4-working platform; 11-rotating base; 12-main arm; 13-first swing arm; 14-second swing arm; 15-telescopic cylinder; 16-swing cylinder; 17-grabbing arm mechanism; 171-swing rod; 172-connecting sleeve; 173-mechanical gripper; 21-bracket; 22-outrigger cylinder; 23-lifting cylinder; 24-rod delivery mechanism; 25-drill rod box; 31-support arm; 32-straightening cylinder; 33-first base; 34-connecting rod; 35-swing arm; 36-clamp; 37-second base. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the protection scope of the present invention.

[0019] like Figure 1 As shown, the present invention provides a modular automatic drilling rod system for well repair, including a rod grabbing mechanism 1, a rod delivery mechanism 2, a straightener 3 and a working platform 4. The rod delivery mechanism 2 is used to deliver and retract the drill rod, and the rod grabbing mechanism 1 is used to grab the drill rod. The straightener 3 is used to straighten the drill rod. A grabbing mechanism mounting seat is provided on the working platform 4, the rod grabbing mechanism 1 is arranged on the grabbing mechanism mounting seat, and the straightener 3 is arranged on the working platform 4, and the rod delivery mechanism 2 is independently placed on the side close to the rod grabbing mechanism 1. The rod grabbing mechanism 1 and the straightener 3 are installed on the working platform of the well repair machine, and are leveled and aligned together with the main machine during operation. The rod delivery mechanism 2 is arranged according to the site conditions and is placed on one side of the rod grabbing mechanism 1. When raising the rod, the rod grabbing mechanism 1 is rotated and adjusted on the working platform 4 to a position convenient for grabbing the drill rod in the delivery rod mechanism 2. After the rod is grabbed, it is rotated to a predetermined position, and the telescopic cylinder 15 is extended to the maximum position. After the grab arm swings to the center of the hole, the straightener 3 straightens it, and the positioning work of the rod is completed; when lowering the rod, the straightener 3 straightens the raised drill rod, and after the grab arm swings to the center of the hole, the grab arm grabs the drill rod, and then the rod grabbing mechanism 1 is rotated to a position convenient for placing the drill rod in the delivery rod mechanism 2, and the packing work of the lower rod is completed. The present invention realizes the precise positioning of the lifting and lowering rods through a modular functional combination, and the layout position of the delivery rod mechanism has a large adjustable space, efficient construction, and convenient operation.

[0020] like Figure 2 As shown, the grabbing rod mechanism 1 includes a rotating base 11, which is arranged on a grabbing mechanism mounting seat, and the grabbing rod mechanism 1 is installed on a working platform 4 through the rotating base 11. One end of a main arm 12 is hingedly connected to the rotating base 11, and the other end of the main arm 12 is connected to the grabbing arm mechanism 17 through a swing cylinder 16. The middle of the main arm 12 is hingedly connected to the bottom end of a telescopic cylinder 15, and the telescopic ends of the telescopic cylinder 15 are respectively hingedly connected to one end of a first swing arm 13 and a second swing arm 14, and the other ends of the first swing arm 13 and the second swing arm 14 are respectively hingedly connected to the rotating base 11 and the main arm 12. The present invention controls the angle between the main arm 12 and the rotating base 11 through the telescopic control of the telescopic cylinder 15, so as to achieve the height adjustment of the main arm 12. The grabbing arm mechanism 17 includes a swing rod 171, and mechanical grippers 173 are respectively arranged at both ends of the swing rod 171, and the swing rod 171 is connected to the swing cylinder 16 through a connecting sleeve 172. The two mechanical grippers 173 are used to grab the two ends of the drill pipe. The mechanical gripper 173 is an articulated structure driven by a cylinder, and its specific structure is as follows: Figure 3 shown.

[0021] like Figure 5As shown, the centralizer 3 includes a support arm 31, the lower end of which is connected to the working platform 4, and the centralizer 3 is installed on the working platform 4 through the support arm 31. A first base 33 is fixed on the support arm 31, one end of the first base 33 is connected to one end of the centralizing cylinder 32, the other end of the first base 33 is hingedly connected to two swing arms 35, the other end of the centralizing cylinder 32 is connected to the second base 37, and the centralizing cylinder 32 is telescopic to drive the second base 37 to move forward and backward. The second base 37 is connected to one end of two connecting rods 34, the other ends of the two connecting rods 34 are movably connected to the ends of the two swing arms 35, and a clamp 36 is provided at the front end of the swing arm 35. In the present invention, the working principle of the stabilizer 3 is as follows: the extension of the straightening cylinder 32 drives the second base 37 to move away, the second base 37 drives the movable arm 35 to rotate inward through the connecting rod 34, and the clamp 36 on the movable arm 35 clamps the drill pipe; the contraction of the straightening cylinder 32 drives the second base 37 to move closer, the second base 37 drives the movable arm 35 to rotate outward through the connecting rod 34, and the clamp 36 on the movable arm 35 loosens the drill pipe.

[0022] like Figure 4 As shown, the rod delivery mechanism 2 includes a bracket 21, a drill rod box 25 is installed on the top of the bracket 21, and a lifting cylinder 23 and a rod delivery mechanism 24 are installed between the bracket 21 and the drill rod box 25. The lifting cylinder 23 can be raised to take out the drill rod from the drill rod box 25, and the lifting cylinder 23 can be lowered to put the drill rod back into the drill rod box 25. The support leg cylinder 22 is installed at the bottom of the bracket 21.

[0023] The specific working process of the present invention is as follows: when grabbing the drill rod from the delivery rod mechanism 2, the lifting cylinder 23 is lifted to take out the drill rod from the drill rod box 25, and then dropped to place the drill rod on the delivery rod mechanism 2. After the delivery rod mechanism 2 delivers the drill rod to the predetermined position, the rotating base 11 is rotated to adjust the grabbing rod mechanism 1 to the grabbing position, the telescopic cylinder 15 is retracted, the main arm 12 is dropped to a suitable position, and the rotating cylinder 16 rotates the grabbing arm mechanism 17 to the grabbing position, and the mechanical gripper 173 is used to grab the drill rod. After the grabbing is completed, the telescopic cylinder 15 is raised to lift the main arm 12 to the maximum position, the rotating base 11 is rotated to the center of the orifice, and the rotating cylinder 16 is rotated to rotate the grabbing arm mechanism 17 to the installation position. The straightening cylinder 32 in the straightening device 3 extends to drive the second base 37 to move, and pushes the swing arm 35 to move, completing the tightening straightening action. When unloading the drill rod, the above actions are performed in reverse order.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A modular automatic drilling rod tripping system for well repair, characterized in that: The invention comprises a grabbing rod mechanism (1), a feeding rod mechanism (2), a centralizer (3) and a working platform (4); a grabbing mechanism mounting seat is arranged on the working platform (4); the grabbing rod mechanism (1) is arranged on the grabbing mechanism mounting seat; the centralizer (3) is arranged on the working platform (4); the feeding rod mechanism (2) is independently placed on a side close to the grabbing rod mechanism (1); the grabbing rod mechanism (1) comprises a rotating base (11); the rotating base (11) is arranged on the grabbing mechanism mounting seat; a main arm ( The main arm (12) is connected to one end of the main arm (12), the other end of the main arm (12) is connected to the arm grabbing mechanism (17) through a swing cylinder (16), the middle of the main arm (12) is hingedly connected to the bottom end of the telescopic cylinder (15), the telescopic ends of the telescopic cylinder (15) are respectively hingedly connected to one end of a first swing arm (13) and a second swing arm (14), the other ends of the first swing arm (13) and the second swing arm (14) are respectively hingedly connected to the rotating base (11) and the main arm (12), the arm grabbing mechanism (17) comprises a swing rod (171), both ends of the swing rod (171) A mechanical gripper (173) is respectively provided, the swing rod (171) is connected to the swing cylinder (16) through a connecting sleeve (172), the centralizer (3) comprises a support arm (31), the lower end of the support arm (31) is connected to the working platform (4), a first base (33) is fixed to the support arm (31), one end of the first base (33) is connected to one end of the centralizing cylinder (32), the other end of the first base (33) is hingedly connected to two swing arms (35), and the other end of the centralizing cylinder (32) is hingedly connected to the second base (3 7), one end of two connecting rods (34) are connected to the second base (37), the other ends of the two connecting rods (34) are respectively movably connected to the ends of the two swing arms (35), and a clamp (36) is provided at the front end of the swing arm (35). The rod delivery mechanism (2) comprises a bracket (21), a drill rod box (25) is installed on the top of the bracket (21), a lifting cylinder (23) and a rod delivery mechanism (24) are installed between the bracket (21) and the drill rod box (25), and a leg cylinder (22) is installed at the bottom of the bracket (21).

2. A modular automatic drilling rod tripping system for well repair according to claim 1, characterized in that: The mechanical gripper (173) is an articulated structure driven by a cylinder.

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