SELF-CONTAINED DOWNHOLE RECORDER OF POWER PARAMETERS OF DRILL BITS Russian patent published in 2024 - IPC E21B45/00 

FIELD: drilling equipment.

SUBSTANCE: invention is intended for measurement of power parameters of bits operation. Independent downhole recorder of power parameters of bits operation consists of lower adapter with coupling lock thread in lower part, to which the bit is screwed, and conical nipple thread in upper part. Adapter has inner lower and upper ends, an internal thread above the upper end. Barrel with an axial channel is screwed into the lower adapter from the side of the coupling thread, the pedestal on which the shell rests, electronic unit located between the barrel and the shell, a cover covering the upper space between the barrel and the shell, seals sealing various cavities, upper sub screwed on lower sub. Recorder is equipped with a strain gauge bushing made in the form of a thin-walled pipe with diameter D and length L with a thread on one end, which is screwed into the inner end of the lower adapter, and a flange on the other, which is pressed to the outer end of the lower sub by the clamping nut screwed into the inner thread of the lower sub. Strain gages converting deformations are glued to the outer surface of the pipe element of the strain gauge, caused by forces acting on the coupling thread, into electrical signals, which are transmitted to the electronic part of the device.

EFFECT: two pressure sensors screwed into extensions with axial through channels, which are screwed into the lower end of the lower sub, measurement of in-tube and annular pressure of flushing fluid and start-up of electronic part for recording of measured and digitized parameters.

3 cl, 2 dwg