| 摘要 |
<p>This invention relates to a down-hole tool assembly having a tool body (1),(101) with at least one pocket (4),(104), and at least one cartridge (5),(105) such as a roller assembly or a stabilizing pad or a reamer pad, fastened in the pocket (4),(104) in at least two different locations by fastening elements which are screwed into the tool body. The cartridge (5), (105) comprises abutment means (62),(72);(162),(172); (14),(15); (114),(115) for constraining the axial movement of each fastening element (8),(9);(108),(109) in a direction away from the tool body (1),(101), and the dimensions of the cartridge (5),(105) are such that there is a total clearance (C) between two opposite sides of the cartridge (5), (105) and the facing pocket walls, such that C ‰¤ X 2 + Y 2 - X , where X is the cartridge dimension between the opposite sides, and Y is the depth of the pocket (4). The invention also relates to a method for assembling and a method for disassembling such a downhole tool assembly.</p> |
