| 摘要 |
FIELD: well drilling and operation, particularly perforators with extendable perforating members, for instance actuated by fluid means. ^ SUBSTANCE: perforator comprises body adapted to receive pushing piston, wedge and two levers. The pushing piston has central and two side hydraulic channels provided with hydraulic monitor heads. Each cutting tool is secured from one side of each lever. The cutting tools are spring-loaded from opposite sides thereof to urge tools one from another and may slide along wedge sides to project cutting tools in opposite directions. The perforator is provided with two guiding pads. Each guiding pad is carried by corresponding lever and connected thereto by means of additional pin to provide guiding pad projection in depressions as cutting tools are in projected state to cut through slots in production string. The depressions are formed in production string by means of cutting tools. ^ EFFECT: possibility to create two slits simultaneously in production string without cutting tool damage and jamming. ^ 6 cl, 3 dwg |
