SU1587167A1 - Telescopic drill-pipe string - Google Patents

Abstract

The invention relates to a drilling technique and is intended for a rock cutting tool. The goal is to simplify the design. The drill pipe string contains outer, intermediate and inner pipe sections and fixation units of the sections relative to each other. Fixation units have spring-loaded jamming elements installed in the upper part of the pipe sections. At the upper end of each of the pipe sections are installed bushings 12, made by a multi-faceted truncated pyramid. The jamming elements are made in the form of a separator 9 with balls 10 that are freely installed in it. Separator 9 is located concentrically truncated pyramid surface with the possibility of balls 10 interacting with the surface of the pyramid when connecting pipe sections. The number of faces of the pyramid and balls 10 is odd. When assembling a tube string, each inner tube is inserted into its outer tube. At the same time, the balls 10 roll back up, compressing the spring 13 through the separator 9 tons 11 and the sleeve 12 and freely passing the inner pipe into the outer pipe. After the inner tube is installed, its fixing unit is mounted on the upper part, and it is inserted into the next outer tube, and so on until complete assembly. 4 il.

Description

V 0US.3

meda. The jamming elements are made in the form of a separator 9 with balls 10 that are freely installed in it. Separator 9 is located concentrically truncated pyramid surface with the possibility of balls 10 interacting with the surface of the pyramid when connecting pipe sections. The number of faces of the pyramid and balls 10 is odd. When assembling a tube string, each inner tube is inserted into its outer tube. At the same time, the balls 10 roll back up, compressing the spring 13 through the separator 9 tons 11 and the sleeve 12 and freely passing the inner pipe into the outer pipe. After the inner tube is installed on the upper part, its fixation unit is mounted, and it is inserted into the next outer tube, and so on until complete assembly. 4 il.

The invention relates to a drilling technique, mainly to drill pipe columns, designed to transfer axial load and torque to a rock-breaking tool at the bottom and to supply a cleaning agent.

The purpose of the invention is to simplify the construction of the telescopic string of drill pipes.

FIG. Figure 1 shows schematically the telescopic string of drill pipes; in fig. 2 - column sealing unit; in fig. 3 - two adjacent sections of pipes with their fixation unit; in fig. 4 shows section A-A in FIG. 3

Telescopic column contains outer (upper) 1, intermediate 2 and 3 and inner (lower) 4 drill pipes, the connecting device of the upper pipe to the rotator 5 of the drilling rig, the connecting device of the lower pipe to the drilling tool 6, the sealing unit 7, installed in the bottom parts of each of the pipe sections, except the last one, associated with the drilling tool 6. The telescopic column contains a fixing unit for the pipe sections relative to each other, which are mounted on each intermediate and internal section x bushings 8 made as a polyhedral truncated pyramid s.nechetnym number of facets, and a separator 9 from loosely mounted therein the balls 10, whose number equals the number of sides of the pyramid and is an odd number. The separator is located concentrically with the incised surface of the pyramid with the possibility of the balls interacting with its surface when connecting the pipe sections. The separator is connected by a clamp 11 with a sleeve 12, a spring-loaded spring 13 relative to the pipe 4. The spring rests on the tension nut 14. On the upper part of the inner pipe 4, the rod 15 is mounted on the bearings 16 to connect the pipe 4 with the tripping mechanism.

When assembling a telescopic column, each inner tube is inserted into

its outer, while its balls roll back up, squeezing the spring through the separator, rods and sleeve and freely pass the inner tube into the outer. After the inner tube is installed, its fixing unit is mounted on the upper part, and it is inserted into the next outer tube, and so on until complete assembly.

Assembled telescopic column

connected with the rotator 5 of the drilling rig and with the drilling tool 6, lowered into the well and placed on the barrel, holding the inner pipe by the stem of the rod 15 by some grip (for example, shliprm).

Turn on the rotation and serves a cleaning agent.

In this case, the pipes capture the clamped balls 10 of the fixing units and through them and the pyramidal sleeves 8 transmit the rotation to their inner pipes, which at the end is perceived by the drilling tool B.

The axial load in the well dredging process is also transmitted through balls.

10 fixation units and pyramidal bushings 8. When the rotator 5 is deepened for a full stroke, it is raised together with the outer top. With its pipe 1, but all subsequent pipes remain in the lower position, when the rotator 5 is lowered with pipe 1, the assembly balls 10, the fixings are trapped between pipe 3 and sleeve 8 and transfer the axial load. This happens until the entire telescopic column is fully extended to the full depth of the well.

At the end of the drilling of the well, the full depth or the specified flight is lowered into the telescopic column on the rope, the slips that captures

the upper head of the rod 15, which turns off the device of the lower pipe 4, and pushes it upwards, at the same time the sleeve 12 rises first, which, through the rods 11, lifts the separator 9 with balls 10, and compresses the spring 13. The balls are removed from the pinch between the sleeve 8 and outer tube 3, the fixing unit is released and

lifting the inner bottom pipe 4, after lifting it to its full height, its fixing unit presses the sleeve of the fixing unit of the next pipe and releases it, then all the pipes are subsequently released, and the drill is lifted to the surface.

Since the safety catcher is above the upper edge of the outer upper pipe, it can also be released (if necessary). After the drill is emptied (or other technical operations with it), the entire column is lowered into the well and drilling continues.

If drilling is carried out in continuous downhole with flushing (or blowing) of a well, then this process is not interrupted by rises until the full depth of the well is reached.

Claims (1)

Invention Formula Telescopic string of drill pipes, including outer, intermediate the inner sections of the pipes and the fixing units of the sections are relatively one another, containing spring-wedged jamming elements installed in the upper part of each intermediate and internal section of the pipes, characterized in that, in order to simplify the design, it is equipped with the upper and outer parts of each intermediate and internal pipe sections with bushings made in the form of a multifaceted truncated pyramid, and the jamming elements are made in the form of a separator with balls that are freely installed in it, and the separator is located the concentrically truncated surface of the pyramid with the possibility of the balls interacting with the surface of the latter when the pipe sections join, and the number of faces of the pyramid and the separator balls is odd. Aa