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GB838482A
|
|
Improvements in or relating to a well tool device
|
|
GB844276A
|
|
Stop collar for a well pipe
|
|
GB867810A
|
|
Friction clamp collar
|
|
US2983982A
|
|
Friction clamp collar
|
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US3000444A
|
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Centralizer
|
|
US2998848A
|
|
Stop collar
|
|
US3012612A
|
|
Slip actuating mechanism
|
|
US3004606A
|
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Packer device for wells
|
|
US2881840A
|
|
Tool for use in cementing well casing
|
|
GB787220A
|
|
Improvements in or relating to stop collar assembly for well drilling
|
|
GB779810A
|
|
Improvements in or relating to a well tool device
|
|
US2872226A
|
|
Stop collar for a well pipe
|
|
US2881839A
|
|
Well scratcher
|
|
US2693859A
|
|
Liner hanger
|
|
GB639083A
|
|
A device for conditioning and cementing wells
|
|
US2402223A
|
|
Rotary well bore cleaner
|
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CA694325A
|
|
Cement basket
|
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CA851999A
|
|
Flow-reversing liner shoe for well gravel packing apparatus
|
|
CA693717A
|
|
Tool for use in cementing well casing
|
|
CA897059A
|
|
Method and apparatus for vibrating and cementing a well casing
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