| 摘要 |
FIELD: oil production, particularly devices to be inserted in multilateral well offshoot. ^ SUBSTANCE: unit comprises body 1 with pin 2, central through channel 3, spherical recess 4 and inner groove 5 located in central part thereof. Spring-loaded piston 7 with technological groove 8 formed in outer surface thereof and with rod 9 is air-tightly inserted in inner groove. The rod has central through channel 10 and beveled lower end 11. Unit also has deflecting head 12 with semi-sphere 13 in upper part thereof. The head 12 rotatingly and slidably cooperates with lower part of spherical recess 4. Upper semi-sphere plane 14 may be in contact with beveled lower end 11 of piston 7 rod 9 as piston moves downwards. Pin 2 may cooperate with groove 8 created in piston. Piston 7 is rotatingly inserted in the body 1. Deflecting head 12 is spring-loaded from body 1. Technological groove 8 is made as longitudinal slots alternately directed upwards and downwards and connected with each other through figured slot so as piston reciprocates relatively body pin serially cooperates with each slot. ^ EFFECT: provision of deflecting head rotation through precise angle, increased simplicity of unit insertion in well offshoot and elimination of repeated works, simplified structure, decreased costs and possibility of unit operation in horizontal directional and horizontal wells. ^ 2 dwg |
