RU2005164C1 - Method of correction of sticking drill pipe string and device for its implementation - Google Patents

Description

wherein a partition 13 is made with openings 14 for passage of the working medium. The shutter is mounted on the ocean using a ball joint 15. The braking chamber is made on the baffle 13. The spring 11 is located in the chamber 8. The nadporshnevoe cavity 10 is separated from the make-up chamber 16 by the perforated baffle 17. The make-up chamber 16 communicates with the flushing channel 9 through the central hole 18 in the baffle 17 and the hollow sleeve 19 located at one end in the hollow stem 6 with the possibility of axial and angular movement.

Drummer 3 has a thinning 20 in the middle part (or in the form of a single-cavity hyperboloid) and is installed in the housing in guides 21 made with the possibility of angular movement relative to the axis of the device, for example, pairing them with the housing on a spherical surface.

A membrane 22 is installed in the outlet cavity 5 of the housing, above which a hole 23 is made in the wall of the housing,

The feed chamber is provided with a slide valve 24, which, prior to operation, closes the opening 25 about the side wall of the housing. Hole 25 provides a drill-less drill string.

The device operates as follows.

It is mounted as part of a drill pipe string. During drilling, the device, which is integrated into the pipe layout, ensures the circulation of the working medium through the flushing channel 9. When a sticking occurs, a thrown shut-off ball-ball is lowered into the column, which blocks the hole 18 during travel, then the pressure in the piston cavity 10 increases ( the partition 17 is perforated).

As the pressure increases, the hammer 3 with the valve 7 moves downward, while the springs 4 and 12 are compressed. When the load on the shutter 7 increases from the spring 12, it rises and, under the action of the spring 12, moves sharply into the braking cavity 8. Under the action of the spring, the hammer 3 also moves upward and strikes the anvil 2, which generates a force impulse. It is transmitted through the housing to the stuck part of the column in the form of deformation of the last and axial forces towards the wellhead, the ability to remove the column from the well.

The working condition of the device is the curvature of the well; therefore, the body in a complex-profile well is elastically curved. In this connection, the impact on the anvil will be off-center, i.e. part of the end surface of the hammer. Since the center of mass

of the striker does not lie on the line of impact, then under the influence of kinetic energy (the resultant is applied in the center of mass of the striker), the striker will transfer energy to the housing 1 by the side surface 5, which will result in elastic transverse deformation of the column. The guides 21 do not prevent the body from bending (the striker remains linear), since it is made with

0 the possibility of angular movement relative to the axis of the device. The resulting elastic transverse strains are transmitted to the stuck portion of the column. A noncentral impact on the anvil 2 by the end face of impact5 nickel causes longitudinal and transverse deformations in the body.

The bending of the housing does not affect the interaction of the elements of the device, since all the two half-elements are made with

0 the possibility of angular movement: the sleeve 2 is slightly smaller than the diameter of the stem cavity (provided with a seal) and pivotally interacts with the baffle 17 and with the stem 6. The shutter 7 is mounted on the stem 6

5 by means of a ball hinge 15, which allows it to fit exactly on the valve seat made on the hammer 3. The hammer remains curved when the body is curved, since the guides 21 are self-aligning 21. The straightness of the hammer with the general body curvature ensures its off-center impact on the anvil .

Due to the fact that curvature is possible

5 wells does not affect the operability of the device, its length, and consequently, the developed power is limited by the strength properties of the material at a common pressure developed

0 equipment servicing well sinking.

In the absence of circulation below the hammer (for example, the channel is blocked by a collapse), we cut off the membrane 22 by applying a pulse

5 pressures of the working fluid from the wellhead. Thereby, we restore the circulation of the liquid below the hammer through the hole 23.

The arrangement of the device in the drill pipe string and the increase in the impact power significantly reduce the time required to eliminate accidents in complex wells.

5 (56) Copyright certificate of the USSR No. 658259. cl. E 21 8 23/00, 1979.

USSR copyright certificate No. 945363, cl. E 21 B 23 / 00.1982.

USSR copyright certificate M 1293338, cl. E 21 8 23/00, 1987

Claims (2)

The claims 1 A method for eliminating sticking of a drill string, comprising transmitting longitudinal and transverse vibrations to the stuck portion, characterized in that, in order to increase the effectiveness of counter-trapping measures in complex wells by increasing the impact power, lateral vibrations to the stuck portion of the drill string are transmitted to the form of elastic lateral bending deformations of the latter, 2. A device for eliminating sticking of a drill string, comprising a housing with an anvil on the inner surface, a hammer with a flushing channel mounted in guides mounted in the housing, and a valve spring-loaded relative to the last force spring, loaded with counter springs relative to the housing and installed with 5 0 the ability to interact with the drummer, and the power chamber. characterized in that, in order to increase the effectiveness of anti-seizure measures in complex-profile wells by increasing the impact power, it is equipped with a hollow sleeve, a perforated partition with an axial hole, installed in the B feed chamber. and a throwing ball to close the axial hole of the perforated partition, the valve stem and its shutter are hollow and mated with a ball joint, the floor of the sleeve is placed at one end in the perforated partition coaxially with its axial hole and the other in the hollow rod with the possibility of axial and angular displacements, the striker is made with thinning in the middle part, and the guides of the striker are mounted in the housing with the possibility of angular displacement relative to the longitudinal axis of the device.