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822 Drilling and Well Completions<br />

Figure 4-1 75. Rock-type underreamer nomenclature. (Courtesy Smith<br />

International, Inc.)<br />

Figure 4-1 76. Rock-drilling underreamer nomenclature. (Courtesy Smith<br />

International, Inc.)<br />

Figure 4-177. Drag-type underreamer nomenclature (open arms). (Courtesy<br />

Smith International, Inc.)

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