COMPLEX HYDRAULIC WEDGE PERFORATOR (VERSIONS) Russian patent published in 2017 - IPC E21B43/114 

FIELD: machine engineering.

SUBSTANCE: perforator consists of a body (B) 1 and one or more plungers 2 installed in first and the second versions serially therein in the upper part of a piercing mechanism and below it. According to the third version, the piercing mechanism is set below the plunger 2. According to the first and second versions, the piercing mechanism consists of a wedge-shaped unit 4 rigidly fixed on the B 1 mounted immovably and directed with the wedge-shaped part downwards; according to the third version, the wedge-shaped unit (WU) 4 is also immovably fixed on the B 1 and installed with a wedge-shaped part upwards in the lower part of the B 1. The piercing mechanism (PM) according to all the versions includes a piston-pusher (PP) 5 and working member in the form of at least two levers (L) 6, each is which is provided with a piercing tool (PT) 7 at one end. The second end 9 of the L 6 is mounted on PP 5 for turning relative to axis of said PP 5. The second end 9 of the L 6 is fixed on the PP 5 configured for reciprocal movement under the plunger 2 action. The WU 4 is installed so that on its wedge-shaped surface can move under the action of the PP 5 upper parts L 6 with PT with gradual output into through slots 11 of the B 1. According to the first and second versions, the perforator is provided with an axial tubular channel 12 for providing passage of working fluid during operation through an axial fluid passageway 13 of the WU 4, PP 5, the plunger 2 into lower part of the B 1. According to all three versions, at least one plunger 2 is spring-loaded. According to the first version, the PT 7 and the L 6, respectively, have through hydraulic channels 14 and 15, respectively, with the jet nozzles in the zone of their contact. At least one hydraulic fluid channel 16 is also provided in the WU 4 hydraulically communicated with its axial hydraulic channel 13. The L 6 and PT 7 are made with for upward-downward movement relative to the WU 4 under the effect of PP 5 to ensure that the hydraulic channel 16 of the wedge-shaped unit 4 is moved upward from the hydraulic channel 15 of the L 6 and correspondingly to the hydraulic channel 14 of the PT 7 (fig. 1). According to the second and third versions, the hydraulic channel 17 is made longitudinal in the body of the L 6 and immediately merging into the hydraulic channel 14 of the PT 7. In the PP 5 there is a through hydraulic channel 18 connected to said hydraulic channel 17 of the L 6. The hydraulic channel 18 of the PP 5 is connected to the hydraulic channel 17 of the L 6.

EFFECT: possibility to puncture casing pipes of any diameter, while ensuring reliability of operation due to simplified design of the piercing mechanism in the proposed perforator by reducing the probability of the piercing tool jamming.

23 cl, 5 dwg