SU1656118A1 - Vacuum sampler - Google Patents

Abstract

The invention relates to drilling and is intended to obtain core material during rotary drilling. The goal is to increase the core yield during rotary drilling. The vacuum ground pump includes a housing (K) 1 with a rock-destructive tool 3 and a core cavity in its lower part, bounded in the upper part by a fixed partition (NP) 5 with a central channel 6 and a check valve (K) 7, and a pump element. The latter is made in the form of a hollow plunger 8 with a reverse K 9, spring-loaded relative to NP 5 and mounted with the possibility of axial movement. A separating sleeve 11 is installed in the upper part K 1. The plunger 8 and the sleeve 11 are made with radial holes 14, 15, together with the internal cavity 16 of the plunger 8 with the piping space. Under the action of the compressed fluid in the chamber formed by K 1, NP 5 and the sleeve 11, opens K 9 and the washing liquid enters the cavity of the plunger 8. Downward movement of the plunger 8 occurs before the impact of the K-12 disk against the stroke restriction 17. At this point, K 12 is opened and the flushing liquid flows into the cavity 16 of the plunger 8. When the plunger 8 moves upward, a vacuum develops in the lower chamber, while K 7 opens and the contents in the core receiver are drained. The core is lifted with K 7 closed, which is enough to hold it in the submersible. 1 il. About

Description

The invention relates to drilling and is intended to obtain core material during rotary drilling.

The purpose of the invention is to increase the core yield during rotary drilling.

The drawing shows a vacuum primertonos (longitudinal section).

The vacuum submersible consists of a body 1 mounted on a string of drill pipe 2 with a rock-breaking tool 3 and a core-receiving cavity 4 in its lower part, bounded in the upper part by a fixed partition 5 with a central channel 6 and a check valve 7. The pump element is designed as a hollow plunger 8 with a non-return valve, the spring is spring 10 relative to the fixed partition 5 and is mounted for axial movement. In the upper part of the housing 1, a separating sleeve 11 is installed. The plunger 8 is closed in

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the upper part of the disc valve 12 is connected with the spring 13, which rests on the sleeve 11. The sleeve 11 and the plunger 8 are made with radial holes 14 and 15, which communicate the internal cavity 16 of the plunger 8 with the nozzle space.

On the housing 1 is installed travel stop 17.

Vacuum submersible works as follows.

In the initial position, the spring 10 is decompressed, the disk valve 12 closes the cavity of the plunger 8, the spring 13 is decompressed.

When flushing fluid comes from the pump through the string of drill pipes in the chamber bounded by housing 1, separation sleeve 11 and drill pipes 2 (further the upper chamber), pressure rises, causing the plunger 8 to compress the spring 10 and move downwards.

Under the action of the compressed fluid in the chamber formed by the housing 1, the partition 5 and the sleeve 11 (hereinafter the lower chamber), the check valve 9 is opened and the flushing fluid enters the cavity of the plunger 8.

Downward movement of the plunger 8 occurs before the poppet valve 12 hits the travel stop 17. At this point, the valve 12 opens and the flushing liquid of the upper chamber flows into the cavity 16 of the plunger 8. The pressure in the upper chamber drops, the plunger 8 under the action of the spring 10 moves upward, the valve 9 closes. As the plunger 8 moves upward, a vacuum develops in the lower chamber, valve 7 is opened and the contents are sucked in the core receiver. The plunger 8 returns to its original state, the cycle repeats.

Gruntonos in its work provides a bottom-hole wash as follows. The flushing fluid discharged through the opening 15 partially rises to the wellhead, lowers partially under the crown, and the liquid trapped under the crown along with the drilled rock is sucked into the core receiver.

The core is lifted with the valve 7 closed, which is enough to hold it in the submersible.

The work of the ground pump is regulated depending on the flow rate of the washing liquid.

and stroke of the plunger 8.

Claims (1)

Invention Formula Vacuum Submersible Containing a body with a rock-breaking tool and a core-receiving cavity in its lower part, bounded in the upper part by a fixed partition with a central channel, a pumping element with a check valve, spring-loaded relative to the fixed partition and installed with the possibility of axial movement, which is the output of core material in the process rotary drilling, it is equipped with a separating bushing installed in the upper part of the body, with a disk valve, spring-loaded relative to the bushing, while the fixed partition is made with a check valve, the pump element is in the form of a hollow plunger, the sleeve and the plunger having radial openings for communication of the inner cavity of the plunger with the annulus space.