SU1375781A1 - Rigid reflector of hydraulic waves - Google Patents

Abstract

The invention relates to devices for drilling exploration wells in combination with hydraulic hammers and improves the efficiency of its application by increasing the power of the supplied fluid flow and amplification and the reflectance of wave energy. The reflector includes a housing 9, an upper adapter (P) 1 with a feed channel ( K) 17, the resonator 8 and

Description

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WITH

annular reflective cavity 12 with a dead end 13 at the bottom. Moreover, P1 is connected to a supply line whose inner diameter is smaller than that of K 17. In the upper part of the body 9 an intermediate P6 is placed with a spring-loaded non-return valve 3 of the poppet type. Its rod 4 is located in the guide K7 of the intermediate Pbo The surface 15 of the head of the check valve, spanning K 17, is smaller than the surface 16 of this head from the bottom.

When the fluid is supplied to the supply line, the check valve 3 opens to form an annular gap through which the fluid enters the hydraulic hammer machine. In this case, there are hydraulic waves, under the action of which the check valve 3 closes K 17. The wave, having reached through the cavity 12 to the dead end 13, is reflected and comes to the machine during the working stroke phase. The cycle is repeated. 1 il.

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The invention relates to a device for drilling exploration wells in conjunction with hydraulic hammer machines.

The purpose of the invention is to increase the efficiency of applying a rigid reflector of hydraulic waves by increasing the power of the supplied fluid flow, as well as enhancing the reflection coefficient of wave energy. The drawing shows the proposed device.

The reflector consists of the upper adapter 1, the valve box 2, the valve valve type 3 with the stem 4, the valve spring 5, the intermediate adapter 6 with the forward channel 7, the inner tube (resonator) 8, the housing 9, the lower adapter 10, holes 11 in the reflective cavity 12, the dead end 13, the holes 14 in the cavity of the valve box 2, the upper surface 15 of the valve head, the lower surface 16 of the valve head and the inlet channel 17.

The device works as follows.

When flushing fluid is supplied to the hydraulic hammer, the piston-hammer and valve of the latter are driven into oscillatory motion. The resulting hydraulic waves pass through the cavity of the resonator 8, the apertures 11 and the reflective cavity 12, are reflected from the dead end 13 and come to the car again during the working stroke phase.

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When the flushing fluid is supplied to the supply line (not shown), the disc valve 3 opens under the pressure of the flow on the upper surface 15 of the valve head and forms an annular gap, the diameter of which is larger than the internal diameter of the supply line. The flushing fluid passes through this gap, the holes 14 and the resonator 8, enters the hydraulic hammer machine, forcing it to work.

The resulting hydraulic waves, spreading upwards, come to the upper part of the reflector and exert a hydraulic shock pressure on the bottom surface 16 of the valve head 3, directed upwards.

The poppet valve 3 under the action of the hydraulic wave and the valve spring 5 closes the inlet channel 17 in the upper adapter 1 and eliminates the loss of the hydraulic wave along the drill string. At this time, the hydraulic wave through the holes 11 and the reflection cavity 12 reaches the dead end 13, from which it is reflected and comes back to the machine during the working stroke phase. Further cycle of the movement of hydraulic waves

repeats.

"

The reflector, in comparison with the known ones, allows one to increase the impact energy and, consequently, the shock power of the downhole machine.

Claims (1)

Invention Formula A rigid hydraulic wave reflector, comprising a housing with an upper adapter connected to the supply line, a resonator and an annular reflective cavity with a dead end in the lower part, characterized in that, in order to increase its efficiency by increasing the power of the supplied fluid flow, as well as Wave Energy Reflection Ratio is equipped with an intermediate adapter with a disc-type check valve, the stem of which is placed in the guide channel of the intermediate adapter, and the upper adapter is made with a supply channel with a diameter larger than the internal diameter of the supply line, and the check valve is spring-loaded in the direction of the supply channel, and the surface area of the valve head that overlaps the supply channel is smaller than the surface area of the same head from the bottom side.