DEVICE FOR IN-WELL BED PROCESSING Russian patent published in 2014 - IPC E21B33/12 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed device comprises through packer and disconnector including barrel, slide arranged therein and connected with shear elements. Slide comprises seat for ball to be thrown inside the device before processing of upper bed, conical bore to house lock ring interacting with ring groove. Barrel has radial holes and extra shear elements, destruction force of which is higher than that of shear pins. Besides, the barrel is furnished with bypass channel to communicate the barrel top and bottom parts bypassing the slide. Note here that bypass channel and barrel holes are tightly closed by the slide provided with radial channels. Axial central hole is made at slide bottom. The barrel is equipped with the rod rigidly secured thereto, below said slide and directed thereto, and with axial holes arranged in circle. Capacity of said axial holes is larger than that of the slide central hole. Extra seat is made at slide top section for larger-diameter ball to be thrown inside the device after processing of top bed to return to bottom bend via bypass channel. Circular groove is composed by ring cuts directed opposite said lock ring at slide bottom section and can interact with lock ring fitted in taper groove above axial holes at barrel bottom section. Extra shear pin is fitted in the barrel, under taper groove accommodating said lock ring.

EFFECT: perfected design, enhanced performances, higher reliability.

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