SU1375786A1 - Drill bit - Google Patents

Abstract

The invention relates to a technique for drilling deep wells for oil and gas and allows for improved cleaning and cooling of wear-resistant rock-destroying elements (IPE) of a bit. It is reinforced with IPE 5 and includes a housing 1 with a central flushing channel A-A (CPC) and calibrating blades (CL) with longitudinal flushing slots 3 between them. But the intersection line of the grooves 3 with the rock-cutting surface of the housing 1 is equipped with a wear-resistant screen 7. Its height corresponds to the height of the working part of the IPE 5. At the same time, the PI of the housing 1 is located along the bisector of the angle between adjacent CLs. When drilling flushing, fluid (RV) enters the bottomhole through 1SCH. From it, the 1Zh moves along the pdzam 3, cooling and cleaning the IPE of the hull 1. Screens 7 change the direction of the part of the pancreas from 1 PK to IPA 5, directing the pancreas to the CL. In this way, the peripheral area of the bit is cleaned. Part of the pancreas penetrates through the gap between the screen 7 and the surface of the bottom. Qualitatively new conditions are achieved for cleaning the surface from psham. 4 il. o (l

Description

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FIG. 2

And the issue relates to the field of drilling deep wells for oil and gas, namely drill bits.

The aim of the invention is to improve the cleaning and cooling of the rock-breaking elements of the bit.

Figure shows a chisel from the end; FIG. 2 is a section A-A in FIG. FIG. 3 shows the direction of movement of the flushing liquid from the central channel; figure 4 - section bb in figure 2.

The bit consists of body 1 (Fig. 1), divided into calibrating blades 2 by longitudinal grooves 3. But the bisector of the angle SL between adjacent blades 2 contains rock-breaking elements 4, Calibrating blades are reinforced porously, additionally destructive elements 5 and calibrating elements 6. Wear-resistant screens 7 are located along the line of intersection of the longitudinal grooves 3 with the housing 1 (FIGS. 1 and 3). On

Figure 4 shows rock-destroying liquid liquid at the surface of the bottom improvement 5, located on the peripheral part of the housing 1, and screens 7, having a height a corresponding to the height of the working part of the rock-crushing elements. A washing channel 8 is located in the central part 30 of the housing 1 (Figures 1 and 3), and longitudinal washing grooves 9 are located on the calibrating surfaces of the blades 2.

There is a heat removal from the ends of rock-breaking elements 4 and 5, and a decrease in the velocity of the fluid near the surface of the bit body 1 reduces its hydroabrasive wear.

Formula of the invention A drill bit reinforced from a hammer works as follows: nasal resistant rock cutting elements When drilling, the flushing fluid enters the bottom through the central flushing channel 8, From the channel 8, the flushing liquid moves to the longitudinal grooves 3, leading into the inter-blade area, where the resistance its movement is minimal. On the path of the fluid to the base of the grooves 3. rock cutting elements 4 are located, which are subjected to intensive cleaning and cooling. The free flow of fluid into the longitudinal grooves 3 prevents wear-resistant screens 7, which change the direction of a part of the fluid from channel 8 to elements 5 and direct it to the calibrating surfaces of the blades 2 in longitudinal channels, including a housing with a central flushing channel, calibrating blades, the longitudinal flushing grooves between the blades, which are so that, in order to improve the cleaning and cooling of the rock-breaking elements of the bit, it is equipped with a wear-resistant screen placed along the line of the cross section GOVERNMENTAL grooves with rock cutting surface of the housing, wherein the height of the screen corresponds to the height of the working elements chasti.porodorazrushayuschih, wherein porodorazrumayuschie elements body disposed along the bisector of the angle between adjacent blades templating.

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washing grooves 9. This achieves intensive cleaning of the peripheral zone of the bit, reduces wear of rock-breaking elements 5 and calibrating elements 6. A part of washing liquid penetrates through the gap 5 between the ends of screens 7 and the surface due to the wear resistance of rock-cutting elements 4 and 5 made , for example, from Slavich, wear resistance of screens 7, made by the method of hardfacing. The minimum gap S between the end of the screens 7 and the bottom surface is equal to the protrusion of diamonds from the matrix of rock-razruschankhtsik elements 4 and 5, made of slavutych.

Due to the gap 5 between the screens 7 and the bottom, new conditions are obtained for cleaning the surface of the bottom from sludge.

Increase wash speed

surface fluids

There is a heat removal from the ends of rock-breaking elements 4 and 5, and a decrease in the velocity of the fluid near the surface of the bit body 1 reduces its hydroabrasive wear.

The p-rmula of the invention Drill bit reinforced from

includes a housing with a central flushing channel, calibrating blades, longitudinal flushing grooves between the blades, so that, in order to improve the cleaning and cooling of rock-breaking elements of the bit, it is equipped with wear-resistant a screen placed along the line of intersection of the longitudinal grooves with the rock-destructive surface of the body, the screen height corresponding to the height of the working part. the rock-breaking elements, while the rock-breaking elements, the body are located along the bisector of the angle between cm zhnymi the metering blades.

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Claims (1)

Claim A drill bit reinforced with wear-resistant rock erosion elements, including a housing with a central flushing channel, calibrating blades, longitudinal flushing grooves between the blades, characterized in that, in order to improve cleaning and cooling of the rock-destructive elements of the bit, it is equipped with a wear-resistant screen placed along the line the intersection of the longitudinal grooves with the rock-cutting surface of the body, and the height of the screen corresponds to the height of the working part. rock-cutting elements, while rock-breaking elements, housings are located along the bisector of the angle between adjacent calibrating blades. Figure 1 6-B Figl Fi.gZ