SU1740619A1 - Drilling tool - Google Patents

Abstract

Use: core drilling with removable core receiver. SUMMARY OF THE INVENTION: The device includes drill pipes with a rock cutting tool in the lower part, core pipes placed in them, a removable core receiver with a drill bit and a lock. The retainer is made in the form of a housing associated with the sleeve, and sliding elements placed in its groove. Each of the sliding elements is designed as a two-armed lever. The shank is connected to the drill pipe - and is made with an inner annular groove. The lower and upper arms of the arms in the working position abut against the lower and upper edges of the annular groove, respectively. The lower shoulders of the levers are larger than the upper ones, and their span in the open position is equal to the diameter of the annular groove. 4 sludge. J

Description

The invention relates to mining. in particular, for drilling means with core sampling.

Known columnar with a removable core receiver complex KSSK-76. comprising a locking mechanism, a suspension assembly and a receiving tube.

A removable core cone Cone for the KSSK-76 complex is known, consisting of a clamping head with a blocking mechanism, a regulator and a container.

In both designs, when blocking, the removable core receiver rests on the protrusions of its body on a support ring fixed in the outer string of pipes. The presence of a landing on the support ring limits the scope of the removable core receiver. So it is impossible to use it in columns of pipes with an inner smooth surface, for example, in a complex

for drilling with hydrotransport core. In these cases, placing such a support ring inside the core of the drill string tubes will result in the need to reduce the diameter of the core receiver part of the removable core receiving through the support ring and, accordingly, to reduce the diameter of the core obtained. In addition, the presence of an internal protrusion formed by the support ring can be caused by a core under normal drilling with hydrotransport of a core without a removable core receiver.

A drilling rig is known, which includes a removable core receiver with a body-shaped retainer with sliding elements and an abutment, and in the core-pipe string there is an internal annular groove for interaction with the sliding elements of the retaining device. YouVI

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the moving elements are made in the form of a collet with an annular piston and a return spring, and the stop is made in the form of a clamp with radially compliant elements.

However, this drilling rig is difficult to manufacture and unreliable in operation.

A removable core receiver is also known, comprising a housing associated with a sleeve, in the groove of which is mounted rotatably around an axis of a latch with a spring, each latch being made in the form of a two-arm lever with a locking shoulder associated with a spring.

However, such a structure is complex and does not provide reliable fixation of the core receiver in the core pipe string when drilling with hydrotransport of the core.

The purpose of the invention is to increase reliability and simplify the design.

The goal is achieved by the fact that in a drilling device containing drill pipes with rock-breaking tools, core pipes placed in them, a removable core receiver with a drill bit and retainer in the form of a body connected to the sleeve, and sliding elements placed in its groove, each of which made in the form of a two-armed lever connected to drill pipes; a shank made with an internal annular groove for interacting with the sliding elements; the lower and upper arms of the levers are adapted to It is time E working position in the lower and upper edges of the annular groove, respectively, while the lower arms of the levers are larger than the upper and their span in the open position is equal to the diameter of the annular groove.

FIG. 1 and 2 show a drilling rig with a fixed removable core receiver, a longitudinal section; Fig. 3 shows a drill bit when the removable core receiver is lowered, a longitudinal section; FIG. 4 shows a removable core receiver at the moment of its extraction with an overshot, a fragment.

The drill string consists of a drill pipe 1 with a rock cutting tool 2, inside which core pipes 3 are installed, having a shank 4 with an internal annular groove 5. Inside the core pipes 3 and the shank 4 a removable core receiver is placed, consisting of a clamp b, a regulator 7 and core support section 8. Latch 6 includes body 9, sleeve 10, pin 11, head 12, levers 13 and 14 placed on a common axis 15. springs 16 and 17. Levers 13 and 14 are designed so that their shoulders are greater than the upper arms The regulator 7 includes a housing 18, a bearing 19, a spring 20, bearing support 21 and rod 22

The core receiver section 8 contains an adapter 23 with a ball valve 24 a core receiver tube 25, a die crown 26

The latch 6 is connected to the housing 18 of the regulator 7 by means of the shaft 27. The regulator 7 is connected to the adapter 23 by a core receiving section 8 by means of a rod 22

The drilling rig operates as follows.

Up to the sampling interval, a well is drilled with a continuous tapping and hydrotransport of the core without lifting the drill pipe string 1. When the rock-destructive tool 2 reaches the coal interval, the drill pipe string 1 is elevated above the face and

0 the removable core receiver is lowered. During the movement of the removable core receiver inside the core pipes 3, the upper arms of the locking levers 13 and 14 slide along the internal surface of the core conductors.

5 pipes 3, which are pressed to it by springs 16 and 17. In this case, the lower arms of the levers 13 and 14 are smaller than the upper arms, and therefore the lower arms extend with a radial clearance relative to the inner surface of the core-conductive pipes 3 and do not touch the inner ring groove 5 of the shank 4, under the action of the springs 16 and 17, they are moved apart by the difference in the internal diameters of core-conductors

5 tubes 3 and an annular groove 5 and are pressed against the inner surface of the groove 5. The lower arms of the levers 13 and 14 are also moved apart by a large amount due to the difference in the lengths of the upper and lower arms and occupy

0 a position in which also the inner surface of the annular groove 5 is touched. In this position the removable core receiver is fixed inside the core-carrying pipes 3.

5 The drill bit, together with the removable core receiver, is lowered onto the face and drilling begins at the Crown-die 26 interval, ahead of the rock cutting tool.

0 2 is introduced into coal, thereby isolating the core from the destructive effect of the washing liquid stream.

After the intersection of the coal interval, drilling is stopped, the projectile is lifted over the face and lowered into the overshot. When tensioning overshoot, the sleeve 10 connected to the head 12 by the pin 11 moves upward relative to the body 9. In this case, the upper and lower arms of the levers 13 and 14 begin to move until

upper shoulders not disengaged from the inner annular groove 5 Unlocked removable core receiver removed to the surface

The use of the proposed drill string ensures coal sampling with the use of a removable core receiver when drilling with a complex with a hydraulic trans port core. The simple design with sliding elements increases the reliability of operation. The design allows to obtain a core with a larger diameter than that of similar devices, through the use of an internal groove instead of a support ring, as a result of which the reliability of testing is increased.

Claims (1)

Formula of the invention A drill bit containing drill pipes with a rock cutting tool in the lower part, core pipes placed in them, a removable core receiver with a drill bit and a retainer in the form of a body connected to the sleeve, and sliding elements placed in its groove, each of which is made in the form of a two-armed lever connected to the drill pipe, a shank made with an internal annular groove for interacting with sliding elements, characterized by the fact that, in order to simplify the design and increase reliability, the lower and upper arms of the levers are made with the possibility of their abutment in the working position in the lower and upper edges of the annular groove, respectively, while the lower arms of the levers are larger than the upper ones, and their span in the open position is equal to the diameter of the annular groove. FIG. one d FIG. 2 fie.z 27