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| Number | Title | Issue Date |
| 7407022 | Apparatus for pumping drill cuttings and dual cylinder positive displacement pump for moving drill cuttings and method of use A dual cylinder positive displacement pump is used to move drill cuttings. The pump may include one or more of a self-sealing wear ring member/wear plate member interface, stainless steel pumping cylinders, and a hopper with an inclined surface. ... | 08/05/2008 |
