Overground operating string delivery mechanism

[0016] Example 1: Refer to the attached figure 1 , image 3 with Figure 4 , The lower end of the ramp 8 of the uphole operation pipe string conveying device of the present invention is connected to the catwalk support 9, the catwalk body 5 is above the catwalk support 9, and the upper end of the catwalk body 5 is horizontally provided with a V-shaped slide 11, The drill block 4 can slide in the V-shaped slide 11. A lifting support leg 6 and a sliding support leg 3 are connected between the catwalk body 5 and the catwalk support 9. Both ends of the lifting support leg 6 are hinged with the catwalk support 9 and the catwalk body 5 respectively, and the lifting support leg 6 and the sliding support leg 3 are hinged in an X shape at their respective midpoint positions. One end of the sliding support leg 3 slides in the lower rail 7, and the other end of the sliding support leg 3 slides in the upper rail 2 and is connected to the horizontal hydraulic cylinder 10. A guide conveyor belt 1 is provided at one end of the V-shaped slide 11 close to the ramp, and the guide conveyor belt 1 is connected to a motor. The catwalk body 5 is also provided with a tube conveyor belt 12 and a slot. The two tube conveyor belts 12 are placed in the slot in parallel and perpendicular to the V-shaped slide 11. The pipe drive belt 12 connects the lifting hydraulic cylinder 13 and the bidirectional hydraulic motor 14.

[0017] Process of uploading the pipe string: reference image 3 In the starting position, the sliding support leg 3 and the lifting support leg 6 of the uphole operation pipe string conveying device are placed in the catwalk support 9, and the catwalk body 5 is placed horizontally on the catwalk support 9 and is in contact with The tube racks on both sides have the same height, the height of the tube conveyor belt 12 is lower than the V-shaped slide 11, and the terminal of the tube rack is close to the catwalk body 5. in Figure 4 In the position shown, the piston rod of the lifting hydraulic cylinder 13 is extended to lift the tube conveyor belt 12. Since the length of the tube conveyor belt 12 is greater than the width of the catwalk body 5, the pipe string on the tube rack closest to the catwalk body 5 will be Lift up. The lifting hydraulic cylinder 13 stops lifting, and the bidirectional motor 14 drives the pipe conveyor belt 12 to move, moving the pipe string to the top of the V-shaped slide 11, and then retracts in the lifting hydraulic cylinder 13, the pipe conveyor belt 12 descends, and the pipe string stays in the V-shaped Inside the slide 11. When raising the pipe string, under the action of the horizontal hydraulic cylinder 10, the two ends of the sliding support leg 3 slide along the upper rail 2 and the lower rail 7 respectively, and the sliding support leg 3 and the lifting support leg 6 jointly support the catwalk body 5. The catwalk body 5 is also approaching the drill floor as it rises. figure 1 Position, the catwalk body 5 reaches or slightly higher than the height of the drill floor surface, and one end of the catwalk body 5 is close to the edge of the drill floor. At this time, the lifting stops and the drill carriage 4 starts to push the pipe string to the drill floor wellhead. When one end of the pipe string reaches the surface of the drill floor and is close to the wellhead, use the drawworks on the drill floor or the top drive elevator to clamp one end of the pipe string and lift it up to the wellhead as a whole, and the process of sending the pipe string is completed.

[0018] Lower string process: reference figure 1 , The top drive elevator lifts the pipe string vertically and tilts the pipe string to push against the catwalk body 5. The bottom end of the pipe string first falls on the guiding conveyor belt 1 at the end of the V-shaped slide 11 near the slope, and then the drill carriage 4 The guide string enters the V-shaped slide 11 as a whole. The horizontal hydraulic cylinder 10 works, and the catwalk body 5 descends horizontally and descends to the initial position. Finally, the lifting hydraulic cylinder 13 works, and the pipe row conveyor belt 12 lifts the pipe string in the V-shaped slide 11 and transmits it to the pipe racks on both sides, and the process of lowering the pipe string is completed.

[0019] The role of the guiding conveyor belt 1 provided at the end of the V-shaped slide 11 near the ramp is: the guiding conveyor belt 1 drives the bottom end of the pipe column to move. When the slope of the pipe string is large, the friction between the bottom end of the pipe string and the V-shaped slide 11 is very large, and the bottom end of the pipe string is likely to be stuck in the process of lowering the pipe string by the top drive. The guiding conveyor belt 1 solves the problem. This problem allows the bottom end of the pipe string to slide smoothly on the V-shaped slide 11.

[0020] Example 2: Reference figure 2 On the basis of the structure of the pipe string conveying device for uphole operations in Example 1, one end of the sliding support leg 3 close to the catwalk body 5 is a telescopic arm with a built-in hydraulic cylinder.

[0021] The process of uploading the pipe string: First, the catwalk body 5 is at the initial position, and the pipe conveyor belt 12 transfers the pipe string on the pipe rack to the V-shaped slide 11, and the drill carriage 4 moves to the pipe string along the V-shaped slide And against one end of the pipe string. Then the telescopic arm of the sliding support leg 3 is extended, so that the end of the catwalk body 5 close to the drill floor is tilted, and the catwalk body 5 is in an inclined state. The horizontal hydraulic cylinder 10 works, and the catwalk body 5 starts to lift. When the end of the catwalk body 5 close to the drill floor rises to the top of the drill floor and approaches the wellhead, the lifting stops. At this time, the catwalk body 5 still maintains a certain inclination with the horizontal plane. . Then, the drill block 4 is sent to push the pipe string to the wellhead, the top drive elevator clamps one end of the pipe string and lifts the pipe string to the wellhead, and the process of sending the pipe string is completed.

[0022] Lower pipe string process: The top drive elevator lifts the pipe string vertically and makes the bottom end of the pipe string fall on the V-shaped slide 11 or the guiding conveyor belt 1 near the end of the ramp. Because the catwalk body 5 has a certain inclination with the horizontal plane, The pipe string is easier to move on the V-shaped slide 11. The drill carriage 4 guides the entire pipe string into the V-shaped slide 11, and then the horizontal hydraulic cylinder 10 works, the catwalk body 5 descends, and land on the catwalk support 9, at this time the telescopic arm of the sliding support leg 3 is retracted, The catwalk body 5 is restored. Finally, the lifting hydraulic cylinder 13 works, and the pipe row conveyor belt 12 lifts the pipe string in the V-shaped slide 11 and transmits it to the pipe racks on both sides, and the process of lowering the pipe string is completed.