SU447496A1 - Naddolotny ut Zhelitel - Google Patents

Description

one

The invention relates to the field of drilling wells, in particular to devices for generating loads for bits.

Naddolitny ut uthelite, co. non-connected cargo tubular elements freely mounted on the drill string.

The described overhead distance; 1Fel differs from that known in that each overlying cargo tubular element has a greater mass than the lower section, which allows to increase the shock loads on the bit.

The drawing shows the lower part of the drill string with the proposed coupler.

The bottom hole drill bit consists of cargo tubular elements 1 mounted on the drill string 2 above the rock-breaking tool 3. The cargo tubular elements have different lengths, which provides the necessary mass ratio. The sections are not connected to each other.

In the lower part, directly above the dog, there is a light section itself, above it, more heavy, etc. In the upper part of the set, there is the most heavy section. The weight of the sections is transferred to a rock cutting tool.

During the oscillatory shpsla at |

the upward movement of the sections leads to an accumulation of energy; when it moves downward, it is transferred to the rock-destroying tool in the form of a blow, and the speed of the impact due to a given mass ratio is increased.

The formation of shock pulses is based on the following phenomenon. If a moving large body hits a resting body with a smaller mass, the second body bounces off the first one at a speed greater than the speed of the first body. Thus, if we carry out a successive collision of several bodies, each of which has a smaller mass, then the last body in this row (with the smallest mass) will acquire

the speed is much higher than that of the first body.

Using this test, one can achieve that most of the energy of the longitudinal oscillations of the drill string will not be spent on its elastic

deformatschoo, and the creation of shock loads acting on rock-destroying tool.

When designing a set, the desire should be based on the weight of the rock-erupting tool (bit, drill bit), weight growth factor, and the total weight of the weight set.

Taking these parameters into account, it is easy to determine the quantity. sekhshy and their weight.

Subject invention

An overhead bit is an aircraft consisting of cargo tubular elements freely mounted on a drill string that are not connected to each other, characterized in that, with an increase in shock loads on the bit, each overlying cargo tubular element has a greater mass than the bottom jets.