RU30836U1 - DEVICE FOR GEOPHYSICAL RESEARCHES OF DRILLING WELLS - Google Patents

Description

DEVICE FOR GEOPHYSICAL RESEARCH DRILLING

The utility model relates to the field of mining, to studies of the geological structure of formations uncovered by boreholes, namely to the technique of geophysical work in boreholes.

Known devices for geophysical research of boreholes, including a casing with a probe and a communication channel with the surface in the form of a cable cable (RF Patent No. 2058480 MKI E 21 V 47/12, published on 04/20/96).

A disadvantage of the known devices is the dependence of the operation of the device on ground equipment and on the reliability of the communication channel.

The closest to the claimed device for the majority of coinciding features is a device for geophysical research of boreholes, including a casing with a probe and a communication channel with the surface (MEGA-R complex of radioactive and acoustic logging tools, in the collection “Inventions and rationalization in the oil and gas industry No. 1 - 2002. p.3-5- prototype).

However, the capabilities of the known device are limited by the size of the casing.

The problem solved by the use of the claimed utility model is to expand the range of geophysical surveys in the well for one descent into the well.

The technical essence of the claimed device lies in the fact that the known device for geophysical research of boreholes, including a casing with a probe and a communication channel with the surface, is equipped with an additional casing connected to the main one, and the additional equipment located in it is autonomous.

The supply of the device with an additional casing connected to the main one provides the expansion of the device's functionality due to the fact that additional equipment can be placed in the additional casing.

MKI7: E21B47 / 026

WELL

The implementation of additional equipment located in an additional casing, autonomous ensures the independence of the device from ground equipment, and therefore high performance.

In FIG. 1 shows a longitudinal section of the claimed device.

The device comprises a main casing 1 with geophysical equipment 2 (for example, with a gamma-ray logging tool) and a hole 3 for an ionizing source (for example, neutron - RiVe) radiation and a pressing spring 4.

The lower part of the casing 1 ends with a connecting threaded nipple 5, and the upper one - with a threaded sleeve 6 for connection with a string of tubing or drill pipe 7.

The casing 1 by means of a thread 5 through an adapter 8 is connected to an additional casing 9 ending in a cone 10. In an additional casing 9, stand-alone equipment is placed (for example, VEMKZ high-frequency electromagnetic logging sounding), and in a cone 10 designed for unhindered movement of the device along the wellbore, equipment can be placed for recording the natural potential of rocks, the so-called "own potential-PS.

The proposed device operates as follows.

Geophysical instruments are placed in the casings of the main 1 and additional 9, and, in the main casing 1, a device connected by telemetry to ground equipment can be placed, and in the additional 9 - autonomous.

Then the device is lowered into the well on a string of drill or tubing 7, reading the readings from the main casing 1.

After lifting the device to the surface, decryption and binding of the floor D1 data are carried out from the device located in the additional casing 9.

TECHNICAL-ECONOMIC OR OTHER EFFICIENCY

1. Improving the productivity of field geophysical sounding of boreholes.

2. Expansion of the complex of geophysical studies in steeply and horizontally wells.

Claims (1)

A device for geophysical research of boreholes, including a main casing with a geophysical probe and communication channels with ground equipment, characterized in that it is equipped with an additional casing connected to the main one, and the additional equipment located in it is autonomous.