DEVICE FOR TRANSPORTATION OF INSTRUMENTS IN HORIZONTAL, UPWARD AND INCLINED WELLS Russian patent published in 1995 - IPC

FIELD: gas and oil producing industry. SUBSTANCE: device has body, drive, reducing gear, transmission, driving wheels, shock absorber. Axles of driven wheels are connected through connecting rods and shock absorber located along device axis to rod of power member, particular, to hydraulic cylinder, and driving wheels are installed for rolling around of driving wheels over circumferences whose radii are equal to their distance between axes and motion to diametrically opposite sides. EFFECT: higher efficiency. 6 dwg