SU1472633A1 - Bottom hole slurry disintegrator - Google Patents

Abstract

The invention relates to drilling and can be used in installations for flushing wells from sludge. The goal is to increase productivity in the drilling process by using the kinetic energy of the fluid in the cylindrical channel of the mixing chamber (CS). The bottomhole shredder includes a housing (K) 1 with a cylindrical channel 2 in which CS is placed. Inside K 1 are placed a diffuser 3 and a nozzle 4. The inner surface of the diffuser 3 is sprayed with solid metal and has a rough surface. The nozzle 4 is spring loaded and installed with the possibility of axial movements. Receiving chamber 6 is made with flushing channels (PC) 7, the side walls of which are made along a spatial spiral to the axis K 1 towards COP 5 with the direction of the spiral opposite to rotation 1. The section of PC 7 has the shape of an ellipse, and the size of the entrance 8 of each PC 7 is larger the size of its output is 9. In KS 5 a dispersing sleeve 10 is installed, which has an artificial rough surface in the form of a sputtering of carbide material or is made with radial grooves. In the receiving chamber 6, a vacuum is created where the ejected liquid is sucked through the inlet 8. Due to its shape, PC 7 works as a pump, pumping out flushing fluid with sludge particles. 2 Il.

Description

FIG. one

includes a housing (K) 1 with a cylindrical channel 2 in which KG 5 is placed. Inside K 1 are placed diffuser 3 and nozzle 4. The inner surface of diffuser 3 is sprayed with solid metal and has a rough surface. The nozzle 4 is spring loaded and installed with the possibility of axial movements. The receiving chamber 6 is made with flushing channels (PC) 7, the side walls of which are made) along the spatial spiral to the axis K 1 towards the COP 5 with the direction of the spiral opposite to the rotation K 1. The cross section of PC 7 has

an ellipse shape, with the size of the entrance 8 of each PC 7 being larger than the size of its output 9. In KC 5 a dispersing sleeve 10 is installed, which has an artificial rough surface in the form of a sputtering of carbide material or made with radial grooves. In the receiving chamber 6, a vacuum is created where the ejected liquid is sucked through the inlet 8. Due to its shape, PC 7 works as a pump, pumping out flushing fluid with sludge particles. 2 Il.

one

The invention relates to the mining industry, namely to drilling, and can be used in installations for flushing (cleaning) wells ot sludge formed during the drilling process and rotary drilling rigs with low productivity pumps.

The aim of the invention is to increase the productivity of the device in the drilling process by using the kinetic energy of the fluid in the cylindrical channel of the mixing chamber.

Figure 1 shows a downhole slurry chopper, a longitudinal section; in fig. 2 is a section A-A in FIG. 1. The downhole slurry grinder consists of a housing 1 with a cylindrical channel 2 and a diffuser 3. Inside the downhole slurry grinder, a nozzle 4 is spring-loaded relative to the housing with the possibility of axial movement. In the cylindrical channel 2 of the housing there is a mixing chamber 5, the receiving chamber 6 is made with washing channels 7, the sides of which are made along a spatial spiral (screw) to the axis of the housing in the direction of chamber 5 by shifting the direction of the spiral to the opposite direction The cross-section of the flushing channels 7 has the shape of an ellipse, and the size of the entrance 8 of each channel is larger than its size 9. The inner surface of the Miller 3 is sprayed with carbide metal and has a rough surface.

The flushing channels 7 are located above the mixing chamber 5.

An additional dispersing element is installed in the mixing chamber 5 and is made in the form of a dispersing sleeve 10, the internal surface of which has an artificial roughness in the form of a sputtering of carbide material or made with radial poses.

The downhole slurry is rotated by the rotor of the drilling rig, and the flow of flushing fluid under the action of pressure flows from the nozzle 4 into the mixing chamber 5. Due to the axial movement of the nozzle 4 and the pressure of the washing liquid, the nozzle is automatically set at such a distance until the beginning of the cylindrical part of the opening of the mixing chamber 5, at which the device operates at maximum capacity. In the receiving chamber 6, a vacuum is created, into which the liquid is sucked in (ejected) through the inlet 8. Due to the shape, size and direction of the spiral (screw) in the direction opposite to the rotation of the drill bit, the flushing channels work as a kind of pump, additionally suction flushing liquid from tea with sludge

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION A bottomhole grinding machine, including a housing with a cylindrical channel in which a mixing chamber is placed, and a diffuser with a dispersing element, filled with artificial roughness, a receiving chamber with washing channels located above the mixing chamber, and a nozzle, characterized in that to increase productivity in the drilling process by using the kinetic energy of the fluid in the cylindrical channel of the mixing chamber, provided with an additional dispersing element, installed in the mixing chamber, the sides of the flushing channels are made along a spatial spiral to the axis of the housing towards the mixing chamber with the direction of the spiral opposite to the rotation of the housing, and the section of the spiral of flushing channels has the shape of an ellipse, irlsch. the size of the entrance of each channel is larger than the size of its output, and the nozzle is spring-loaded relative to the body and mounted with the possibility of axial movement before the beginning of the mixing chamber. ag.2