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US3318385A
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Anchor device for well tools
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US3357493A
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Retrievable bridge plug
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US3344862A
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Combined tubing anchor collar locator and swivel
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US3338311A
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Stage cementing collar
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US3329007A
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Tubing tester valve
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US3298437A
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Actuator device for well tool
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US3195642A
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Reverse acting anchor for well packers and the like
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US3269177A
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Stuck-point indicator for well pipe
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US3164094A
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Method and apparatus for use with compensating tubing anchor
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US3236309A
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Retrievable packer holddown device
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US3263752A
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Actuating device for valves in a well pipe
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US3255822A
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Actuator device
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US3074518A
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Enclosure for airplane
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US3074484A
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Drag block and slip assembly for well packer or the like
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US3031016A
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Casing scraper
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US3135329A
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Well tool control mechanism
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US3094306A
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Telescopic valve
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US3094169A
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Retrievable packer
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CA722014A
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Telescopic valve
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CA656612A
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Casing scraper
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