The mechanism for lowering and lifting a continuous steel pipe

 

(57) Abstract:

The invention relates to the field of operation and servicing of oil wells using a continuous steel pipes and rods. The mechanism for lowering and lifting a continuous steel pipe includes a housing, conveyor chain, clamping rollers, hydraulic pipe clamping and hydraulic cylinders, chain tension. While the cylinders of the pipe clip pairs pivotally connected with placed into the guide slots on the chassis sliding bearings, bearing clamping rollers. Body groove have a rectangular cross-section. The area of the working surfaces of the pistons of each of the following top-down pair of cylinders less than the previous one. The use of the invention allows to provide the reliability and durability of the mechanism for lowering and lifting a continuous steel pipe with repeated use. 4 Il.

The invention relates to the field of operation and servicing of oil wells using a continuous steel pipes and rods.

A known mechanism for lowering and lifting a continuous steel pipe, comprising a housing, conveyor chain, clamping rollers, cylinders clamp pipe with friction pads, hydraulic cylinders, chain tension (patent USSR N 682145, E 21 B 19/00, AZIA voltage of the pipe is created in the area of its exit from the feed mechanism, which results in this part of damage and tear.

The technical effect of using the proposed solution is to ensure uniform stress distribution along the length of the pipe, forming the tensile and compressive forces in areas of the clip.

This technical effect is achieved as follows.

The mechanism for lowering and lifting a continuous steel pipe includes a housing, conveyor chain, clamping rollers, cylinders clamp pipe with friction pads and cylinders, chain tension. While the cylinders of the pipe clip pairs pivotally connected with placed into the guide slots on the chassis sliding bearings, bearing clamping rollers. Body groove have a rectangular cross-section. The area of the working surfaces of the pistons of each of the following top-down pair of cylinders less than the previous one.

Due to the fact that the guide grooves of the housing are rectangular in cross-section, the movement of the sliders with clamping rollers is directed, without distortions.

Due to the fact that the area of the working surfaces of the pistons of each of the following top-down pair of cylinders less than the previous one, compensated for the uneven tension along the length of the pipe, the conscious clamp pipe total stresses are equal.

In Fig. 1 shows a General view of the mechanism for lowering and lifting;

in Fig. 2 - node clamping circuits;

in Fig. 3 - section a-a of Fig. 1;

in Fig. 4 - section b-B of Fig. 1.

The mechanism for lowering and lifting a continuous pipe includes a housing 1 with the guide grooves 2 having a cross-section of rectangular shape. Into the guide grooves placed clamping rollers 3, is rigidly fixed to the slide 4. Two traction chain 5 with the friction pads 6 are installed through the top of the drive sprocket 7 and the lower idler sprocket 8. Stars through the reduction gear driven by the drive 9. On the outer walls of the mechanism 1 with the two sides of the pairs of fixed cylinders 11, 12, 13, 14, connected to the slide 4 by means of hinges. The cylinders 15 provide the tension of the chain 5.

The mechanism works as follows.

Rotation of the actuator 9 via the gear is transmitted to the upper drive sprocket 7, which rotate circuit 5, thrown over the lower idler 8.

The rollers 3 mounted on the sliders 4 are moved along the guide grooves 5 and grip the pipe 16.

Continuous tube 16 is clamped between the friction pads 6 rotating traction chains 5. Clamp adjusts the 11, 12, 13 and 14 on the slide 4 is transmitted force, providing the necessary voltage to each specific capture zone of the pipe.

The use of the proposed technical solution ensures the reliability and durability of the mechanism for lowering and lifting a continuous steel pipe with repeated use.

The mechanism for lowering and lifting a continuous steel pipe, comprising a housing, conveyor chain, clamping rollers, cylinders clamp pipe with friction pads, hydraulic cylinders, chain tension, characterized in that the cylinders clamping pipes in pairs pivotally connected with placed into the guide slots on the chassis sliding bearings, bearing clamping rollers and the grooves have a rectangular cross-section, and the area of the working surfaces of the pistons of each of the following top-down pair of cylinders less than the previous one.

 

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