SU1550358A1 - Slime of cyclic action slime collector for rock samples in air-percussion drilling - Google Patents

Abstract

The invention relates to a technique for drilling wells with continuous pneumatic conveying of drill cutting material, namely, to technical means for collecting rock samples during pneumatic impact drilling. The purpose of the invention is to increase the efficiency of separation and sedimentation of fine fractions of rock material during pneumatic impact drilling with continuous pneumatic transport of core and cuttings. The sludge collector contains a cyclone bunker 1 with a sludge supply pipe 3. The water supply nozzle 4 eccentrically encloses the sludge supply pipe 3, which allows supplying water to the entrance of the bunker 1 in the form of an annular curtain, the density of which is shifted to the periphery of the bunker 1. This allows you to catch the dispersed fraction and eliminate its discharge by the stream of purification agent into the air outlet pipe 9. 2 Il.

Description

ftrtj

The invention relates to a technique for drilling wells with continuous, pneumatic transport of drill cutting material, namely, to technical means for collecting rock samples during air hammer drilling.

The purpose of the invention is to increase the efficiency of separation and sedimentation of fine fractions of rock material during pneumatic impact drilling with continuous pneumatic conveying core and cuttings with,

, fc Making the water inlet nozzle in the form of an eccentric casing enclosing the sludge feed pipe allows water to be supplied in the form of an annular curtain, the density of which is shifted to the periphery of the bunker. Such a curtain serves to trap the fine fraction and prevent its loss by the flow of cleaning agent

Figo 1 shows the proposed sludge collector, general view; Fig 2 - section aa on fig01o

The sludge collector contains a sludge receiving bin I made in the form of a cyclone. The inlet 2 of the bunker 1 is adjacent to the sludge feed pipe 3 connected to the sludge feed pipe (not shown). 0 At the entrance to the sludge receiving tank 1 a water inlet pipe 4 is installed, connected to the bunker and made in the form of an external casing covering sludge feed pipe 30 The water supply pipe 4 and the sludge feed pipe 3 are located eccentrically relative to each other with an offset of the axis 5 of the pipe 4 to the outside of the sludge receiving bunker 1 (relative to the axis of the cyclone). A circular gap 6 of variable cross section is formed between the nozzle 4 and the pipeline 3, with the greatest thickness of the gap from the outside. Water from the pressure source 0 is supplied to the annular gap through the pipe 7. An opening 8 is made in the lower part of the bunker to unload the deposited rock material. In the upper part of the bunker 1 along the axis there is an air outlet pipe 90. The pipe 3 is fixed in the pipe 4 using an adapter 10 "

The device works as follows.

Q

five

0

0

five

During the well construction process, the drilled rock material along the sludge supply line and the sludge supply pipeline 3 enters through the inlet 2 along the tangent to the inner surface of the cyclone bunker 1. Simultaneously, through the annular gap 6 between the sludge feed pipeline 3 and the water inlet 4 in the bunker 1 is fed pressure through the pipe 7 water, which acts as a water curtain, preventing the direct contact of the rock particles with the wall of the bunker 1, and also protects fine rock material from premature entry into the central zone of the bunker and into the air vent 90

In the process of spiraling downward of the rock particles and the annular stream of water along the cone of the bunker 1, they are wetted with water and the precipitated pulp is deposited on the walls of the bunker 1 o. The particles of the adhering to the wall of the bunker 1 are protected by an adjacent portion of the annular gap 6, the thickness of which is the location should be maximal, which is achieved by an eccentric arrangement relative to each other of the sludge feed pipe 3 and the water inlet pipe 4 located in the adapter 10.

The mode of supply of the annular jet of fluid may vary due to the flow rate of the fluid, depending on the size and mechanical properties of the rock particles, the flow rate of the cleaning agent; The optimum parameters of the annular gap and the eccentricity value are established empirically.

Claims (1)

Invention Formula Slag collector for rock samples during pneumatic impact drilling, including a cyclone sludge receiving bunker, a sludge supply and air vent pipes attached to it, and a water supply nozzle installed at the entrance to the sampling bunker connected to a pressure source, characterized in that there is a need to increase the representativeness of the samples of the breed material. efficient separation and precipitation of its fine fraction, water supply 515503586 The connecting pipe is made in the form of external formation of a variable annular butt of the casing, covering the sludge supply, having the largest cross section of the pipeline and eccentrically extending from the outside of the sludge-receiving bun laid in relation to him with. 2 Compiled L0Gorinova Editor M „Tsitkina Tehred L.Oliynyk Proofreader S.Cherni Order 266 Circulation 497 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 kera0 Subscription