| 摘要 |
A downhole propulsion apparatus comprising at least one pliant or deformable propulsion wheel, wherein the wheel is configured to engage a passage wall and be rotated to propel the apparatus through a passage and wherein the apparatus is configured to exert a contact pressure or force of less than 1000psi or 7500lbs or 7MPa or 33.4kN per wheel; and an associated system and method of propelling a downhole propulsion apparatus. |
