| 摘要 |
An expandable downhole tool for use in an oil well, including a flexible member (10, 1 10, 210, 310) rolled into a helix and having first and second lateral edges (12, 14, 112, 114, 212, 214, 312, 314) on opposing lateral ends of the member (10, 1 10, 210, 310). The flexible member (10, 1 10, 210, 310) is selectively changeable between a compressed configuration wherein the transverse cross-section of the flexible member (10, 110, 210, 310) has a first diameter (D1), and an expanded configuration wherein the transverse cross-section of the flexible member (10, 110, 210, 310) has a second diameter (D2), the second diameter (D2) larger than the first diameter (D1). |
