SU1348479A1 - Deep=well all-purpose rigid reflector of hydraulic waves - Google Patents

Abstract

The invention relates to the drilling of wells and allows to expand the field of application by varying its frequency. The reflector includes a housing 16, a resonator (P) 18, and an annular reflective cavity 19 formed by them with a dead end 20 in its lower section 4, which is connected with an opening 21 with P 18 in the upper section 1. Intermediate sections 6 are made with connectors 7. The number of sections 6 is determined ratios N 1 / L () –Ь 1, pcs. where L is the length of sections 6; C is the speed of propagation of hydraulic waves; Y - the frequency of the hydraulic hammer (PG) 22; L is the joint length of sections 1, 4 in the high-frequency version. Hydraulic waves during the operation of PG 22 are reflected from deadlock 20 and again come to PG 22 in the phase of the working stroke. A column of fluid in the cavity 19 of the reflector and P 1B forms an oscillatory circuit with a standing wave with pressure caps at the ends and with a pressure unit in the region of the nozzle orifice 3 of the adapter 2. Torque is transmitted to the PG 22 through the housing 16. 2 sludge. 7i And -ShggS-lit t (L with 4 00 "; o fi /

Description

113

The invention relates to the drilling of squad stones, and more specifically to devices for improving the efficiency of hydraulic hammers.

The purpose of the invention is to increase the operational comfort and p; 1 expand the scope of the reflector by varying its frequency while maintaining the location of the device directly above the hammer.

Fig, 1 schematically shows a universal downhole rigid reflector of hydraulic waves, a general view; in fig. 2 - high-frequency option.

Universal borehole rigid reflector of hydraulic waves consists of an upper section 1 with an adapter 2 having a nozzle hole 3, a lower section A with an adapter 5 and intermediate sections 6 connected by special connectors 7, including a nipple 8 with a protrusion 9 to which the coupling 10 is screwed and pressed The bearings are NM tabs 11, the sleeve 12 with sealing elements 13 is hermetically seated on the fitting 14 with the centering legs 15.

Each section of the device includes a housing 16 and an inner tube 17, the assembled reflector cavity of the inner tube 17 is a resonator

18, and the chamber between the housing 16 and the resonator 18 forms a reflective cavity 19 with a dead end 20 in the lower section 4 of the lower part of the reflector hydraulically connected by communicating holes 21 to the resonator 18 in the upper section 1 of the upper part of the reflector. The adapter 5 of the lower section 4 is connected to the body of the water hammer 22

The device works as follows.

When fluid is supplied to the hydraulic hammer

the firing pin and the valve of the latter are driven into oscillatory motion, the resulting hydraulic waves pass through the cavity of the resonator 18, the hole 21 and the reflection cavity

19, are reflected from deadlock 20 and again come to the hydraulic hammer during the working stroke phase. The liquid column filling the cavities of the reflector and the resonator forms an oscillating circuit in which a standing wave is established.

with pressure antinodes at the ends and with a pressure unit in the region of the nozzle

792

holes 3 and adapter 2 upper section 1.

The torque is transmitted to the hydraulic hammer through the body 16 of the reflector.

The length L of the reflector is selected depending on the frequency of the hydraulic hammer, favoring the ratio

LO 4 ().

about

where C is the speed of propagation of hydraulic waves.

To do this, the high-frequency version of the reflector (Fig. 2), consisting of the main upper 1 and lower 4 sections and having a length L, includes the required number N of intermediate sections 6 with a length of each L determined from the expression

- If the length of the assembled device exceeds the length of the spark plug, the reflector for increased ease of operation when lifting out of a well is divided in places of special connectors into parts having optimal length and weight.

Performing a reflector from separate sections, connected by special connectors, will allow it to be used on any types of towers, complete with different brands of hydraulic hammers in a wide frequency range, which will expand the area of use of the reflector and facilitate its operation.

Claims (1)

Invention Formula A universal downhole rigid hydraulic wave reflector comprising a housing, a resonator and an annular reflective cavity formed by them with a dead end in its lower part and with a communicating hole with a resonator in the upper one, characterized in that in order to expand the field of application by varying its frequency, it contains the upper a section with a communicating hole, a bottom with a dead end, and intermediate sections made with special connectors, the number of intermediate sections being determined from the ratio J L. S (l, PC. L c „313Д8479 the length of the intermediate sections; rate of propagation of hydraulic waves; the frequency of the hammer; L is the joint length of the main upper and lower sections in the high-frequency version. Compiled by A. Skalunov Editor A. Dolinich Tehred L. Serdyukova Corrector A. Zimokoso Order 5173/31 Circulation 532 Subscription VNIIPI USSR State Committee nq cases of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG. 2