CN102691485B - Continuous pipe working device and rotation speed control method of same - Google Patents

Abstract

A coiled tubing operation device includes an injection head, a coiled tubing, a car body, a drum arranged on the car body, a drum driving mechanism and a pipe row mechanism. One end of the continuous tube is connected to the injection head, and the other end is fixed on the drum after passing through the tube arrangement mechanism. The drum is used for winding the continuous pipe, and can rotate under the driving mechanism of the drum. The pipe row mechanism can guide the continuous pipe to move in the axial direction of the drum. The axis of the drum is parallel to the longitudinal direction of the vehicle body. Because the axial direction of the drum of the above-mentioned coiled tubing operation device is parallel to the longitudinal direction of the car body, the length of the drum increases, which increases the length of the coiled tubing wound on the drum, thereby increasing the working depth of the coiled tubing operation device.

Description

Coiled tubing operation device and its speed control method

technical field

The invention relates to an operating device used in oil and natural gas development, workover, drilling and other constructions, in particular to a coiled tubing operating device.

Background technique

At present, the use of coiled tubing for oil and gas development and workover, drilling, and fracturing stimulation operations has gradually become popular. Coiled tubing replaces drill pipes for oil and natural gas operations, which can avoid disassembly and assembly of drill pipes, thereby reducing downhole accidents such as joint disconnection, reducing labor intensity of workers, saving operating time and improving operating efficiency.

Existing coiled tubing devices usually include a car body, drum, hydraulic station, injection head, etc., wherein the car body is used to carry the drum, hydraulic station and injection head. The drum is used to wind the coiled tubing, and the axis of the drum is perpendicular to the long direction of the vehicle body. However, due to the influence of factors such as road height restrictions and width restrictions, the length and diameter of the drum are limited. Therefore, the length of the continuous pipe wound on it is also limited, thereby affecting the working depth.

Contents of the invention

In view of this, it is necessary to provide a coiled tubing operation device capable of increasing the working depth.

A coiled tubing operation device, comprising an injection head, a coiled tubing, a car body, a roller arranged on the car body, a roller driving mechanism and a pipe arrangement mechanism, one end of the continuous pipe is connected to the injection head, and the other end passes through the row The pipe mechanism is then fixed on the drum, the drum is used to wind the continuous pipe, and can rotate under the drive of the drum driving mechanism, the pipe arrangement mechanism can guide the continuous pipe to move in the axial direction of the drum, The axis of the drum is parallel to the longitudinal direction of the vehicle body.

The vehicle body includes a front and a trailer frame connected to the front. The trailer frame includes a roller support portion, and the roller support portion includes two opposite beams, and the two ends of the roller are respectively hinged on the two beams.

The pipe arrangement mechanism includes a guide rod, a screw rod, a sliding seat and a screw drive mechanism, the guide rod and the screw rod are arranged parallel to the axis of the drum, and the sliding seat is slidably arranged on the guide rod, And engage with the screw mandrel, the screw mandrel driving mechanism is used to drive the screw mandrel to rotate, and the continuous tube passes through the slide seat.

The pipe arrangement mechanism also includes a lifting mechanism, the lifting mechanism is hinged on the vehicle body, and the two ends of the guide rod and the screw rod are respectively fixed on the lifting mechanism.

The lifting mechanism includes two supporting parts, two connecting rods, two fixing parts and a lifting oil cylinder. The two supporting parts are respectively relatively fixed on the two vehicle bodies. One end is fixed on two fixed parts, and the two fixed parts are used to fix the two ends of the two guide rods and screw rods respectively. One end of the lifting cylinder is fixed on one of the two beams, and the other end is fixed on the corresponding connecting rod. , to drive the connecting rod to rotate relative to the supporting part.

The sliding seat includes a traction part, an engagement part fixedly connected with the traction part, and a sliding part. The traction part is provided with a through hole for the continuous tube to pass through. The engagement part is engaged with the screw mandrel, and the sliding part Slidingly arranged on the guide rod.

The sliding seat also includes a fixing part, a pressing block and an elastic part, the sliding part is arranged between the pressing block and the pulling part, and the fixing part passes through the elastic part to lock the pressing block on the pulling part.

The coiled tubing operation device further includes a hydraulic station, and the hydraulic station and the injection head are both arranged on the car body, and the hydraulic station and the injection head are respectively arranged at both axial ends of the drum.

The vehicle body includes a headstock and a trailer frame connected to the headstock, and the trailer frame includes a hydraulic station support part, an injection head support part and a roller support part connecting the hydraulic station support part and the injection head support part.

The supporting part of the hydraulic station and the supporting part of the injection head are formed by cross-welding of multiple steel bars. The middle part of the supporting part of the drum is hollowed out, and it includes two oppositely arranged beams, which respectively support the sides of the drum. Axial ends.

A speed control method for a coiled tubing unit, assuming that at time When , the instantaneous rotational speed that can be measured by the drum is , at time Total measurable length of coiled tubing for internal injection or lifting , then the layer radius of coiled tubing on the drum , the linear velocity of the injection head for instantaneous injection or lifting , the coiled tubing is in the layer of the drum Axial speed on , the speed of the pipe arrangement .

Because the axial direction of the drum of the above-mentioned coiled tubing operation device is parallel to the longitudinal direction of the car body, the length of the drum can be increased, so that the length of the coiled tubing wound on the drum increases, thereby increasing the working depth of the coiled tubing operation device.

Description of drawings

Fig. 1 is a perspective view of a preferred embodiment drilling coiled tubing operating device.

Fig. 2 is a perspective view of the coiled tubing operation device in Fig. 1 without coiled tubing.

Fig. 3 is a perspective view of the vehicle frame of the coiled tubing working device in Fig. 2 .

Fig. 4 is a DD1 view of the coiled tubing operation device in Fig. 2 .

Fig. 5 is a partial enlarged view of IV of the coiled tubing operation device in Fig. 2 .

specific embodiment

As shown in FIGS. 1 and 2 , a coiled tubing operation device 100 according to a preferred embodiment of the present invention includes a car body 10 , a drum assembly 20 , a hydraulic station 30 , an injection head 40 and a coiled tubing 50 . The car body 10 is used to carry the drum assembly 20 , the hydraulic station 30 and the injection head 40 . The drum assembly 20 is arranged between the hydraulic station 30 and the injection head 40 , and the injection head 40 is arranged at the rear of the car body 10 , and the hydraulic station 30 is arranged at the front of the car body 10 . One end of the continuous pipe 50 is used to connect the injection head 40 , and the other end is fixed on the drum assembly 20 .

Please also refer to FIG. 3 , the vehicle body 10 is used to carry the roller assembly 20 , the hydraulic station 30 and the injection head 40 , which includes the vehicle head 11 and the trailer frame 13 connected with the vehicle head 11 . The trailer frame 13 includes a hydraulic station support part 131 , an injection head support part 133 and a roller support part 135 connecting the hydraulic station support part 131 and the injection head support part 133 . Both the supporting part 131 of the hydraulic station and the supporting part 133 of the injection head are formed by cross-welding a plurality of steel bars. A through hole is opened in the middle of the roller supporting portion 135 . The roller supporting part 135 includes two large beams 1351 disposed opposite to each other. The two beams 1351 are respectively adjacent to the hydraulic station support part 131 and the injection head support part 133 .

Please refer to Fig. 4, the drum assembly 20 includes a drum 21, a drum driving mechanism 23, a pipe arrangement 25, two drum support seats 27,

The drum 21 is used for winding the continuous pipe 50 . The two drum support bases 27 are respectively fixed on the two large beams 1351, which are used to hinge the two ends of the axis of the drum 21, so that the drum 21 can rotate relative to the drum support bases 27, so that the continuous tube can be wound on the drum 21 or from the drum 21. freed. The axis AB of the drum 21 is parallel to the longitudinal direction of the vehicle body 10 .

The drum driving mechanism 23 is used to drive the drum 21 to rotate. In this embodiment, the drum driving mechanism is a hydraulic motor fixed on an axis end of the drum 21 to drive the drum to rotate relative to the drum supporting base 27 .

The pipe arrangement mechanism 25 includes a lifting mechanism 251, two guide rods 253, a screw mandrel 255, a sliding seat 257, and a screw mandrel driving mechanism 259.

The lifting mechanism 251 is hinged on the two beams 1351 . And it can rotate relative to the two beams 1351 .

The lifting mechanism 251 includes two supporting parts 2511 , two connecting rods 2513 , two fixing parts 2515 and a lifting cylinder 2517 . The two supporting parts 2511 are fixed on the two beams 1351 opposite to each other. One ends of the two connecting rods 2513 are respectively hinged on the two supporting parts 2511 , and the other ends are fixed on the two fixing parts 2515 . The two fixing parts 2515 are respectively used for fixing two ends of the two guide rods 253 and the screw rod 255 . One end of the lifting cylinder 2517 is fixed on one of the two beams 1351 , and the other end is respectively fixed on the corresponding connecting rod 2513 to drive the connecting rod 2513 to rotate relative to the supporting part 2511 .

The two guide rods 253 are arranged in parallel, and the screw rod 255 is also arranged in parallel with the guide rods 253 . Both ends of the two guide rods 253 and the screw rod 255 are respectively fixed on the two fixing parts 2515 of the lifting mechanism 251 , and can rotate relative to the drum 21 driven by the lifting mechanism 251 .

Please refer to FIG. 5 , the sliding seat 257 is slidably disposed on the two guide rods 253 and engages with the screw rod 255 . The sliding seat 257 includes a pulling part 2571 , an engaging part 2573 , a sliding part 2575 , a fixing part 2577 , a pressing block 2578 and an elastic part 2579 .

A through hole 2572 is opened on the traction part 2571 , and the through hole 2572 is used for the continuous tube to pass through, so that the continuous tube can be spirally wound on the drum 21 when the traction part 2571 moves back and forth relative to the drum 21 .

The engaging part 2573 is fixedly connected with the traction part 2571 and is used for engaging with the threaded rod 255 .

The sliding part 2575 is disposed between the pressing block 2578 and the pulling part 2571 . The fixing member 2577 passes through the elastic member 2579 to lock the pressing block 2578 on the traction portion 2571 , so as to fix the sliding portion 2575 on the traction portion 2571 . In this embodiment, the sliding part 2575 is a roller structure, which is used for clamping the guide rod 253 and can slide along the guide rod 253 . When the guide rail is deformed, the sliding part 2575 can be adaptively adjusted through the elastic member 2579 to smoothly complete the movement along the direction of the guide rod 253 .

The screw driving mechanism 259 is fixed on the fixed part 2515 of the lifting mechanism 251, and is used to drive the screw 255 to rotate forward and reverse, so as to drive the sliding seat 257 to slide back and forth along the guide rod 253, thereby aligning the coiled tubes on roller 21. In this embodiment, the screw drive mechanism 259 includes a stepping motor and a speed reduction mechanism.

The hydraulic station 30 is fixed on the support part 131 of the hydraulic station, and the hydraulic station 30 is respectively connected with the drum assembly 20 and the injection head 40 . The injection head 40 is disposed on the injection head support portion 133 .

In order to realize the cooperative control of the pipe arrangement of the drum 21 and the continuous pipe up and down of the injection head 40, the rotation speed of the screw drive mechanism 259 needs to be precisely controlled. suppose at the moment , the measurable instantaneous rotational speed of the drum 21 is , at time Total measurable length of coiled tubing for internal injection or lifting ,but

Coiled tubing horizon radius on drum 21

Injection head 40 instantaneous injection or increased line speed

Layers of coiled tubing in the drum Axial speed on

The rotating speed of screw drive mechanism 259

Therefore, the rotating speed of screw mandrel driving mechanism 259 can be according to the instantaneous rotating speed of cylinder 21 as and the total length of coiled tubing injected or lifted Adjust the changes of the coiled tubing to precisely control the layer position of the coiled tubing on the drum and the axial speed in the direction of the drum axis to achieve precise tube arrangement.

Because the axial direction of the drum 21 of the above-mentioned coiled tubing operation device 100 is parallel to the longitudinal direction of the vehicle body 10, the length of the drum 21 increases, so that the length of the coiled tubing wound on the drum 21 increases, thereby increasing the coiled tubing operation device. depth of work.

Claims (6)

1. A coiled tubing operation device, comprising an injection head, a coiled tubing, a car body, a drum arranged on the car body, a drum-driven hydraulic motor, and a pipe arrangement mechanism. One end of the coiled tubing is connected to the injection head, and the other end passes through the coiled tubing. The pipe arrangement mechanism is finally fixed on the drum, and the roller is used to wind the continuous pipe. The pipe arrangement mechanism can guide the continuous pipe to move in the axial direction of the roller, and the roller is driven by the drum driving hydraulic motor. Rotate down, the axis of the roller is parallel to the length direction of the car body, the car body includes the head and the trailer frame connected with the head, the trailer frame includes a roller support part, and the roller support part includes oppositely arranged The two ends of the roller are respectively connected to the two beams. The pipe arrangement mechanism includes a guide rod, a screw rod, a sliding seat and a screw drive mechanism. The guide rod and the screw rod are parallel to the axis of the drum. Setting, the sliding seat is slidably arranged on the guide rod, and engages with the screw mandrel, the screw mandrel drive mechanism is used to drive the screw mandrel to rotate, and the continuous tube passes through the sliding seat, its features In that: the sliding seat includes a traction part, a meshing part fixedly connected with the traction part, a sliding part, a fixing part, a pressing block and an elastic part; Engaged with the screw rod, the sliding part is slidably arranged on the guide rod, the sliding part is arranged between the pressure block and the traction part, and the fixing part locks the pressure block in the on the traction unit. 2. The coiled tubing operation device as claimed in claim 1, characterized in that: the pipe arrangement mechanism also includes a lifting mechanism, and the lifting mechanism is connected to the car body, and the guide rod and wire Both ends of the rod are respectively fixed on the lifting mechanism. 3. The coiled tubing operation device as claimed in claim 2, characterized in that: the lifting mechanism comprises two supporting parts, two connecting rods, two fixing parts and a lifting oil cylinder, and the two supporting parts are relatively fixed on the two vehicles respectively On the body, one end of the two connecting rods is respectively connected to the two supporting parts, and the other end is fixed to the two fixing parts. The two fixing parts are respectively used to fix the two ends of the two guide rods and the screw rod. On one of the two beams, the other end is respectively fixed on the corresponding connecting rod to drive the connecting rod to rotate relative to the supporting part. 4. The coiled tubing operation device as claimed in claim 1, characterized in that: the coiled tubing operation device also includes a hydraulic station, and the hydraulic station and the injection head are all arranged on the vehicle body, and the hydraulic station and the injection head The head points are arranged at both axial ends of the drum. 5. The coiled tubing operation device as claimed in claim 4, characterized in that: the car body includes a headstock and a trailer frame connected with the headstock, and the trailer frame includes a hydraulic station support part, an injection head support part and a connecting station The supporting part of the hydraulic station and the roller supporting part of the injection head supporting part. 6. The coiled tubing operation device as claimed in claim 5, characterized in that: the supporting part of the hydraulic station and the supporting part of the injection head are formed by cross-welding of a plurality of steel bars, and the middle part of the supporting part of the drum is hollowed out , which includes two oppositely arranged beams, and the two beams respectively support the axial ends of the drum.