FIELD: oil and gas industry.
SUBSTANCE: invention is intended for slot perforation of a casing string, cement stone and rock. Slot perforator for cased wells consists of housing, spring-loaded hollow rod with piston, support rollers, a jet nozzle, a wedge in form of a fork slider, bearing and side plates, lever pivotally mounted in housing and interacting by means of an axis on its free end with wedge. On axis of lever interacting with wedge is hinged a disk cutter with cutting two-sided edges on both sides, made in a multi-tier arrangement with calculated cutting depth of each tier, and peripheral surface is multi-profile with angles of profiles greater than angles of friction.
EFFECT: higher efficiency, reliability and durability of perforator.
1 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR SLOT PERFORATION OF CASED WELLS | 1999 |
|
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RU2182221C1 |
| HYDROMECHANICAL SLOTTING PERFORATOR | 2001 |
|
RU2205941C2 |
