SU562646A1 - Side drill core drill on cable - Google Patents

Description

The invention relates to devices for sampling rock (cores) from the walls of open-hole wells during exploratory and structural exploratory drilling.

When assessing reservoir properties, the most effective but compared with other methods of geophysical exploration. The core research is the common method.

A side drill core drill is known on the cable, comprising a housing, a power drive, a core receiver with a drill core 1.

However, core sampling with this instrument is not sufficiently effective due to the limited core length, which, as a rule, is less than half the instrument diameter.

Also known is a side drill driver on a cable, comprising a housing, a power drive, a core receiver tube with a drill bit, located inside the guide casing 2.

In this core sampler, a keropriem tube is mounted in a guide casing rigidly fixed in the instrument case at a certain angle. However, such a layout of the drilling tool does not significantly increase the length of the sample to be taken. An appliance can take no more than three cores 50 mm long each in one descent.

The aim of the invention is to increase the length of the core being taken and simplify the design of the core sampler.

This is achieved by the fact that in the coring collector the guide casing is hingedly connected with the body and provided with a harnessedly connected with

IMI FOR WATER.

FIG. 1 shows a longitudinal section of a core sampler in the initial position of the actuators; in fig. 2 - core, rni-k, fixed in the interval of research and sampling of rock from the borehole wall.

The device is a cylindrical wellbore, in the hollow body of which mechanisms are installed that serve to cut and remove the kerium. A drilling crown 2 is used as a cutting tool. It is fixed at the end of the core-receiving tube 3. The core-receiving tube is mounted in the guide casing 4, which is hinged at the end with one end. The drill bit 2 and the receiver tube 3 are driven from the electric motor 5 via gear 6, power shaft 7 and flexible shaft 8. The electric motor is located in the hermetic housing 9. Hydraulic pump 10 is mounted on the power shaft 7, which pumps the drilling fluid through the channel a Porschen // retractable mechanism and to the drilling zone along the channel “b. The piston // through the ball system of levers 12 is connected with the winding casing 4. In order to improve adhesion to the wall of the squall, in the process of pressing on the guide 4, a corrugated support bash is installed; poppy 13.

For descending into the well and fixing in the sampling interval, the core sampler has a logging cable 14 and positive loads 15.

U; the device works following | And, m way. The wellbore is lowered to the core sampling interval on the logging cable 14. When electric power is applied to the electric motor 5, it drives the drilling crown 2 and the hydraulic pump 10. the drill assembly is conformable, and with the borehole wall. The support shoe 13 applies the device to the borehole wall. After that, the cable tension is loosened and the device hangs, creating additional wedging force. If necessary, fragile loads can be added to the device 15.

With the cable 14 relaxed, the weight of the movable body 9 of the electric motor 5, acting through shafts 7 and 8, forces the drill bit 2 to penetrate into the formation rock. Depending on the mechanical characteristics of the rock, the weight of the rolling iKopnyca 9 can be adjusted by interchangeable weights (not shown). At this time, the channel "b" opens the access of the washing liquid to the drilling zone. The length of the drilled core can be adjusted as needed, based on the objectives

geological service. The end of the core sampling is recorded on the surface by the change consumed by the motor. At the end of the drilling, the cable is pulled off with the tip of the collet, and the curl is pulled off, the core receiver 3 and the drill 2 are put into the guide casing 4.

device guide casing, release borehole d.

The use in the proposed coring tool of the pull-out assembly of the drilling tool allows a significant increase in the length and number of cores being sampled; refuse additional clamping systems, simplify the design of the device, as well as eliminate the accident rate of core sampling;

Formula of invention

Side drill core drill on cable, including body, power drive,

core tube with a drill bit, located inside the guide casing, characterized in that, in order to increase the length of the core to be taken and to simplify the design, the pressure casing

Sch1p1n Ir | But connected to the housing and provided with a hinge-related drive.

Sources of information taken during the examination:

1. Copyright certificate Lo 173671, M. Kl.2 E 21 In 49/06, 1962.

2. US patent Law 2558452, cl. 175-78, publ. 1951.

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FIG. 2