CS230485B1 - Detachable coupling, in particular for connecting drill rods - Google Patents

Abstract

A detachable coupling, transmitting torque in both directions, is intended mainly for use in connecting drill rods, for drilling rigs β with a downhole hammer. The detachable coupling is formed by an inner end provided on its cylindrical part, on one end of the inner end, with at least two projections arranged radially relative to the axis of the coupling and, on the other hand, with a shoulder arranged behind the projections, on which a seal is arranged radially relative to the axis of the coupling. Another part of the detachable coupling is formed by an outer end, provided with at least two continuous axial grooves arranged radially relative to the axis of the coupling and at least two recesses offset radially relative to the continuous axial grooves, whereby gaps are formed between parts of the continuous axial grooves and parts of the recesses with a depth that is smaller than the depth of the recesses.

Description

(54) Removable coupling, especially for joining drilling ie

The dismountable clutch, transmitting torque in both directions, is intended mainly for use in connecting drill rods, for drilling rigs β with a submersible hammer. The removable clutch is formed by an inner connector provided on its cylindrical part on one side with at least two protrusions arranged radially to the clutch axis at one end of the inner end and on the other hand a shoulder arranged behind the projections. the outer end, provided with at least two axial grooves arranged radially to the coupling axis and at least two radially offset grooves displaced by the recesses, wherein gaps are formed between the portions of the continuous axial grooves and the portions of the recesses to a depth less than the recess depth.

Ί0

230,485 ~ 4 ~

230 485

The invention relates to a removable coupling, in particular for connecting drill rods, which solve an airtight connection of drill rods through which the pressure medium passes.

The prior art detachable drill stem couplings are usually threaded at their ends. The connection is carried out by screwing the drill rods together.

These demountable drill stem couplings damage the threaded fittings. This happens due to the inaccurate and rapid approach of the drill rig with the drill rod to the thread of the second jointed drill rod end.

Kčblšímu. Damage to the threaded endings occurs as a result of stressed disconnection of the tightened drill rods.

Another disadvantage of the threaded connection is the possibility of unscrewing the wedge drill rods in the borehole when exiting the borehole when the drill bars rotate in the opposite way.

The above-mentioned drawbacks are eliminated by a removable coupling, in particular for connecting the drill rods according to the invention, characterized in that the inner end is provided on its cylindrical portion with at least two radially arranged projections arranged at one end of the inner terminal and a shoulder on which a seal is disposed radially with respect to the coupling axis and the outer end slipped on the inner end is provided with at least two radially extending axial grooves disposed at least two radially displaced axial grooves and recesses displaced by the recesses between the continuous axial slot portions The recesses are provided with gaps at a depth that is smaller than the depth of the recesses.

230 480

The releasable coupling according to the invention simplifies and accelerates the coupling and uncoupling of the drill rods. Furthermore, the service life of the coupling will be prolonged, as the pressure medium will create suspension between the ends. A further advantage is that the releasable clutch thus formed is capable of transmitting torque in both directions of rotation.

An exemplary embodiment of a removable coupling according to the invention is shown in the attached drawing, in which Fig. 1 shows the inner and outer end caps, Fig. 2 shows the cross section AA of the inner end, Fig. 3 shows the cross section BB of the outer end. FIG. 4 is a cross-sectional view of the O-G of the male terminal; and FIG.

a section D-D of the outer terminal is shown.

As can be seen from the enclosed figures, the inner end 11 is mounted on the drill rods 10 and the uppermost end. The inner end 1 is provided on its cylindrical part 2 with at least two radially arranged projections 4 at one end and The outer end piece 6 is provided with at least two radially aligned grooves 7 and at least two radially aligned grooves 7 displaced by recesses 8. Between portions of the continuous axial grooves 7 and parts the recesses 8 are formed by gaps v at a depth a which is smaller than the depth b.

By inserting the projections 2 of the inner terminal 1 into the continuous axial grooves 7 of the outer terminal 8 and rotating the outer terminal 8 to a position where the recess 8 faces the projections 2 of the inner terminal 1. whereby the releasable coupling is secured against disengagement.

Disconnection of the plunger rods 10 is performed in the opposite manner to the connection.

Claims (1)

BEFORE M * BTV ϊ Η I BS ^T J 230 485 A removable coupling, in particular for connecting drill rods, consisting of two terminals provided with printing medium openings, characterized in that the inner end (1) is provided on its cylindrical part (2) with at least two radially opposite one end of the inner end (1) clutch axis (o) with projections (3) ε on the one hand behind protrusions (3) with a shoulder (5) on which it is arranged radially to the clutch axis (o), seal těsnění .J ^{and the} outer end piece (6) slid on the inner end ( 1) is provided with at least two axial grooves (7) arranged radially to the coupling axis (o) and at least two axial grooves (7) radially offset to the continuous axial groove (7), with recesses (8) disposed between the continuous axial grooves (7) and recess parts (7) 8) gaps (2) are formed at a depth (a) that is smaller than the depth (b) of the recess (8).