SU827998A1 - Device for unbound flow-rock sampling - Google Patents

Description

The purpose of the proposed invention is to increase the geological accuracy of the selected iroba, to reduce the time and labor required for sampling, as well as to reduce the tractive effort for lifting.

This goal is achieved due to the fact that the device is equipped with partitions installed between the sections connected telescopically; at the same time, the windows are placed iodine and the walls of each section, and the fingers are mounted with the possibility of longitudinal movement.

FIG. 1 shows the proposed device at the time of the drilling process, a general view; in fig. 2 - the same at the time of sampling.

The device comprises a hollow tubular screw assembled from sections 1. The connection of sections 1 is made by a telescopic (sliding) relative to the axis of the device. Each section 1 in the upper part has an external groove 2, and in the lower part an internal groove 3. The upper section 1 with the external groove 2 contains windows 4 closed during the drilling process with the lower end of section 1 above with the internal groove 3. The sections are joined using the locking pins 5, built into the lower end of section 1. The locking pins 5 enter the windows 4 with the possibility of longitudinal (vertical) movement relative to them. Each section 1 in the upper part has a septum 6, which is the bottom of the cavity of the section 1 of the tubular screw. The tubular screw at the lower end contains a rock-breaking tool 7.

The sampling device operates as follows.

In the well, the device is lowered in assembled form and after its descent they start drilling. The drilling is carried out in order to cut down the rock that has flowed into the well and get to the interval where the sample is to be taken. In the process of drilling, windows 4 are closed, and the rock from the bottom goes up through the blade of the m shnek. For sampling, the device is lifted by an amount equal to the sum of the stroke lengths of the sliding joints of sections 1. With a slight rise of the device, due to the resistance forces between the sections of the screw and the squall walls and the sliding configuration of sections 1 of the tube screw, first the upper section the stroke of the joint, and then the subsequent sections 1. In this case, the force for removing the device from the well is sharply reduced. At the moment of the beginning of the ascent, the windows 4 open and the rock from the walls of the well in the interval opposite the windows 4 collapses and fills the cavity of sections 1 through the windows 4.

At that, each section 1 is a kind of container with bottom 6. After filling section 1 with rock, the device is lifted to the surface and samples are taken from it. In the case when the rock from the walls of the well does not self-destruct, at the moment of lifting the device with the windows 4 open, it is necessary to inform it of the rotation. In this case, the rock in the interval of each section 1, lifting the blades of the screw auger, enters through the windows 4 into the cavity of section 1. In both cases, the quality and reliability of the testing will increase.

Example. After the development of the in-situ leaching section, drilling of control wells is started with sampling in the interval of the productive horizon, which lies at a depth of 90-100 m.

After opening the productive horizon, the proposed device, consisting of three links of 1 m length, is lowered into the well, comes to the bottom, and then drilling begins. After the device is immersed in the rock for the full length, it is lifted by 300 mm and a few more turns are made (20-30). At the same time, the rock from the borehole walls through the windows made in the joints of the device enters the cavities of the sections of the tubular neck of the device. Then, lift the device to the surface, remove the sample by removing the fixing fingers of the joint. After removing the samples, the device is collected and re-immersed in the well. Drilling is carried out to the bottom hole dimple by another 3 m, and then the device is lifted above the face by 300 mm and samples are taken from the drilled interval. Sampling is performed over the entire thickness of the productive horizon. Under the conditions described, representative samples are taken from the reservoir every meter.

Claims (3)

Invention Formula A device for sampling non-connected floating rocks, comprising a housing made in the form of a tubular screw, consisting of separate sections with windows located in their side walls and interconnected by means of fixing fingers, in order to increase the reliability and quality of the selected time and effort, the device is equipped with partitions installed between the sections connected telescopically, with the windows placed under the partitions of each section and the fingers mounted with Longitudinal movement. Information sources, taken into account during the examination 1. USSR author's certificate No. 152847, cl. E 21B 46/02, 1962. 2. USSR author's certificate number 144452, cl. E 21B 25/01, 1961. 2 3. USSR author's certificate No. 137065, cl. G 01N 1/04, 1960 (prototype).