SU723093A1 - Pipe string feeding and rotating mechanism - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to mining and can be applied when drilling boreholes of a casing.

Known feeder columns of the pipe when removing them from the well, made in the form of jacks with hydraulic cylinders supply and mechanism for gripping pipes with removable dies 1.

The drawback of the device lies in the fact that its use does not allow for the extraction of pipes with rotation, requires the equipment of a special place at the wellhead and the installation of an additional drive with an autonomous oil station.

The closest technical solution to this invention is the feed and rotation of the pipe string containing a movable rotator, a rotator feed mechanism with feed cylinders mounted on a fixed frame, and a pipe gripping mechanism in the form of movable caps interacting with a movable body connected by rods. mounted on it hydraulic cylinders with a movable rotator 2.

However, the force developed by the feeder of the said device is not enough to eliminate the sticking of the projectile and extract the casing string, while it contains a mechanism whose force is used only to grip the pipes and not to move the pipes.

The purpose of the invention is to increase traction when extracting a pipe string.

This goal is achieved by the fact that, in the mechanism for feeding and rotating the tubing, the movable body of the locking mechanism is provided with a removable support for fixing it on the fixed frame in the rotational interval of the rotator.

FIG. 1 shows a schematic structure of a device in a position to remove pipes; in fig. 2 - elements of a removable support, section A-A in FIG. one.

Claims (2)

The device has hydraulic cylinders 1 and 2 of the feed mechanism, which are permanently fixed on the fixed frame 3. The rods 4 and 5 of hydraulic cylinders 1 and 2 are connected with a movable rotator 6, inside of which a gear 8 with a hub 9 is mounted on bearings 7, on which is mounted in the upper part mechanical chuck 10, and in the bottom - removable caps 11, interacting with a tapered yoke 12 in a movable body 13. The movable body 13 has hydraulic cylinders 14 and 15 fixed on it, the rods 16 and 17 of which are connected to a movable rotator, and also brackets 18 for zack Replacing it on the frame with 3 detachable pins 19. The movable body 13 with hydraulic cylinders 14 and 15, with the rams And and the tapered yoke 12 forms the gripping mechanism of the pipes 20. The brackets 18 with the fingers 19 mounted on the frame 3 are the removable support of the movable casing 13 of the mechanism grip pipes. The attachment points of the removable support to the fixed frame are located so that the rotator, when removing the pipes, is able to move under the action of all hydraulic cylinders from position B to position C by an amount equal to the minimum stroke of the hydraulic cylinders (in the drawing, equal to the motion of the hydraulic cylinders 14 and 15 of the locking mechanism. The device works as follows: When drilling, the pipes 20 are fixed in the rotator with dies 11, pressed against the surface of the pipes with a conical sleeve 12, are displaced downwards relative to the movable rotator 6 together with the housing 13 when The supply of working fluid to the piston cavity of hydraulic cylinders 14 and 15. The rotator 6 moved by hydraulic cylinders 1 and 2 moves together with the movable body 13 and the pipes 20 as one unit. To remove the pipes 20, they are fixed in the rotator 6 by a mechanical clamping chuck 10, the dies 11 are removed, and the brackets 18 are fastened with the fingers 19 on the frame 3. In this position, the rotator in the stroke interval from the position B to the position C equal to the course of the hydraulic cylinders of the gripping mechanism will move together with the pipes under the action of the force created by the joint action eat feed cylinders and gripping mechanisms. This pipe feed and rotation mechanism, used in drilling rigs for casing casing, reduces the time required to extract the pipe string under the most complex geological and technical conditions and ultimately increases labor productivity. Claims The supply and rotation mechanism of a pipe string containing a movable rotator, hydraulic cylinders of a feed mechanism mounted on a fixed frame, and a gripping mechanism for a pipe, on a movable body of which hydraulic cylinders are mounted, the rods of which are connected to a movable rotator, characterized in that When extracting the pipe string, the movable body of the gripping mechanism is provided with a removable support for fixing it on the fixed frame in the rotational interval of the rotator. Sources of information taken into account in the examination 1.Vozvizhensky B.I. and others. Burov mechanics. M., GNTI, 1954, p. 109. 2. USSR author's certificate for application number 2022775/03, .kl. Е 21 В 3/00, 1974 (prototype).