SU1559095A1 - Drilling roller bit - Google Patents

Abstract

The invention relates to roller cone bits, namely to drill bits with air inlet blowdown. The goal is to increase the resources of the bit by intensive cooling of the supports and the removal of sludge. The bit includes a housing 1 with an inlet 2 and an outlet 3 to the canals (K) for the cleaning agent, mounted on the case 1 of the paw 4 with pins 5. The output K 3 is made between the paws 4. On the latter by means of sealed end 7, roller 8, and located between 9 locking bearings and locking pins are installed in them m through the filter in the input K 2, then in the longitudinal and transverse K 11 and out through K 3. This contributes to a more intensive heat removal from the supports and the removal of sludge. 5 il.

Description

The invention relates to roller cone bits, namely to drill bits with air inlet blowdown.

The aim of the invention is to increase the life of the bit by more intensively cooling the supports and removing sludge,

FIG. 1 shows a roller bit; Fig, 2 - the same, input and output channels in the housing; on FIG. 3 - section A-A in FIG. 2; Fig, 4 - channels in the pin; on fig.Z - section BB in figure 4,

The chisel includes a housing 1 with an inlet 2 and an outlet 3 channels for the cleaning agent, paws 4 with trunnions 5 are fixed to the case 1, in which the channels located in the diamegray plane and communicated with the inlet 2 and outlet 3 channels of the housing 1 are installed. roller cutters 6 by means of sealed end 7, roller 8 and located between them, castle 9 bearings and locking pin. The channels in the trunnions 5 are made in the form of a transverse channel 10 located between the end 7 and castle 9 bearings, and longitudinal channels 11 located on both sides of the locking pin on the periphery of the trunnion 5 symmetrically with respect to its axis 12 in the diametral plane and communicated with the transverse channel 10, In the housing 1, the output channel 3 is made between the legs 4e

 The bit works as follows. When the bit operates, a cooling agent enters under the pressure through the filter into the inlet channel 2, then after

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successively into the longitudinal 11 and transverse 10 channels, cool the trunnion 5 and, unhindered from the side of the borehole wall, exit through the outlet channel 3 between the legs 4, facilitating the cleaning of the bottom of the sludge.

The longitudinal 11 and transverse 10 channels, located in the immediate vicinity of the cooled surfaces and not connected to the support cavity, contribute to more intensive heat removal from the supports and exclude ingress of abrasive particles into them.

Claims (1)

Claims Drilling roller bit, comprising a housing with inlet and outlet channels for a cleaning agent, tactile paws attached to trunnion legs, a axle cooling assembly communicated with the inlet and outlet channels of the housing, and the cone mounted on the trunnions by means of sealed end, roller and interlock bearings located between them, and a locking pin, characterized in that, in order to increase the life of the bit by more intensive cooling of the supports and removing sludge, the assembly the coolings in the trunnions are made in the form of a transverse channel located between the end and castle bearings, and longitudinal channels located on both sides of the locking pin on the periphery of the trunnion symmetrically with respect to its axis in the diametrically plane and communicated with the transverse channel, with the output channel in the housing made between paws. V-Y 2 Mf ; 606ssi Thread, Cool aeemt YU Editor A, Motyl Compiled by A. Skalunov Tehred M.DidykKorrektor N. Revska Order 826 Circulation 472 VODIL.State Committee on Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 eleven FIG. five Subscription