| 摘要 |
As representative embodiments of the present invention, each of the new and improved well tools disclosed herein include a perforator provided with one or more sets of longitudinally spaced, selectively fired perforating devices respectively directed along parallel or slightly convergent perforating axes. A wall-anchoring assembly is cooperatively arranged on the tool to permit longitudinal movement of the perforator in relation to the anchoring assembly over a distance which is slightly less than the longitudinal spacing between adjacent perforating devices. Upon positioning of the apparatus in a well bore, the first of two perforating devices in each set is actuated to produce a first perforation extending into the adjacent earth formations. By manipulating the suspension cable, the perforator is then shifted longitudinally in relation to the stationary anchoring assembly for locating the second perforating device in each set immediately adjacent to the previous position of the first perforating device. In this manner, upon actuation of the second perforating device, a second perforation will be produced which at least closely parallels the first perforation so as to be contiguous therewith for displacing compacted, crushed formation materials from the walls of the second perforation into the first perforation so that at least a portion of these walls will be cleared of such unwanted flow-blocking materials.
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