RU1789657C - Core lifter joint - Google Patents

Abstract

SUMMARY OF THE INVENTION: The corestalk connection comprises a sleeve with a bayonet groove and a nipple with a pin fixed in the groove by a locking element made in the form of a liner movably mounted on the nipple. In this case, the insert is mounted with the possibility of longitudinal movement along the longitudinal section of the bayonet groove. 7 ill.

Description

FIELD OF THE INVENTION The invention relates to exploration drilling, and in particular to drilling tools with removable core receivers.

A drill is known including an outer pipe, an inner pipe with its fixation relative to the outer pipe, and a coring device is attached to the inner pipe with a threaded connection (ed. St. USSR No. 742576). When using the tool, the removable part for the fungus is lowered with the help of the overshot into the drill string, where in the lowermost position it is fixed relative to the outer pipe. The drift is driven to the bottom, drilled,

After drilling, the core is torn off using a core tapping ring and the removable part is pulled to the surface using an overshot.

However, such a projectile does not have a sufficiently large core diameter. This is due to the fact that a small core core enters the inner pipe due to the small core hole diameter of the crown due to the significant wall thickness of the inner pipe, which, in turn, is also due to the threaded connection of the inner pipe to the core body of the device. In addition, the threaded connection has a significant length.

Closest to the invention is a drill including an outer pipe, an inner pipe with its fixation relative to the outer pipe, and a core drilling device is attached to the inner pipe with a threaded connection (ed. St. USSR No. 629317). When using the tool, the removable part for the fungus is lowered using the overshot into the drill string, where it is fixed relative to the outer pipe in the lowest position. The rock bottom is drilled. After drilling, the core is torn off using a core-cutting ring and the removable part by the fungus is raised to the surface using an overshot.

However, this projectile does not have a sufficiently large core diameter. This is due to the fact that a small diameter core enters the inner pipe due to the small core diameter of the crown due to the significant wall thickness of the inner pipe, which, in turn, is due to the presence of a threaded connection

00

WITH

Xi 00

oh oh eat

Xi

inner tube with core body, In addition, the threaded connection has a considerable length.

The aim of the invention is to increase core diameter, reliability and reduction of metal consumption, as well as reduction of dimensions.

To do this, in a drill containing an outer pipe, a core receiver pipe with a core drill located in the outer pipe these grooves and the fixing core breaker relative to the core receiving pipe in its working position are a latch.

The latch can be made of various designs: for example, in the form of an insert-plate with a longitudinal window, worn on a pin fixed to a core receiver pipe. The dimensions of the liner, pins and windows are selected to ensure that the pin overlaps in the horizontal section of the L-shaped groove.

In FIG. 1 shows a drill, d, core receiver in working position; in FIG. 2 - core receiver without core detectors; in FIG. 3 is a view A in FIG. 2; in FIG. 4 - core cutter; FIG. 5 is a view B of FIG. 4; in FIG. 6 is a section BB of FIG. 5; in FIG. 7 is a section GG in FIG. 5; on fig. 7 - section GG in fig. 5.

A drill with the proposed core drill connection includes an outer pipe 1 with a crown 2 and a core receiver 3.

The outer pipe 1 has an annular groove 4. The core receiver 3 has a core receiver pipe 5, a core 6 body 6, a retainer 7, a fungus 8.

The core receiving pipe 5 has pins 9, a latch 10 fixed to the core receiving pipe 5 with a pin 11. The latch 10 has a window 12 (FIGS. 1, 2). The core 6 body 6 has a core ring 13 and an L-shaped groove 14.

Grooves for the passage of flushing fluid can be made at the lower end of the core core Yu, in which case the core receiver is centered at the upper end of the crown 2.

A core drill 15 is assembled on the surface and its body 6 is connected to the core receiver pipe 5 as follows. The latch 10 is raised to the upper position. Then, the casing 6 is angled with grooves 14 and pins are connected to the core receiving pipe 5 0 so that the pins 9 fit into the angular grooves 14. Then, the core cutter 6 is turned relative to the pin 9 into the wall of the core cutter 6. After that, the latch 10 is lowered, which has a groove 12 relative to the 5 rivets 11, fixing the core breaker 6 in the working position.

Then, for the fungus 8, the core receiver 3 is lowered into the drill string, which is fixed in the working position with the help of clamps 7 relative to the outer pipe 1. They are put on the bottom and drilling is started.

After drilling, the outer pipe 1 is slightly raised and the core is torn off from the 5th side using a core ring 13.

Then for the fungus 8 using an overshot (not shown), the core receiver 3 with the core is raised to the surface. 0

Claims (1)

The claims A core holder connection comprising a sleeve with a bayonet groove, a nipple with a pin and a locking element for fixing the pin in the bayonet groove, characterized in that, in order to reduce the dimensions, the locking element is made in the form of a liner that is movably fixed on the nipple, while the liner is installed with the possibility of longitudinal movement along the longitudinal portion of the bayonet groove. FIG. / AND ... FIG. 2 ...... B . Fig. & ..F / g. 5 y ... Figure 5 7