4. Wells
  5. Brushing, scraping, cutting or punching-type cleaners
  6. On tubing or casing

Specialised Petroleum Services Limited

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Apparatus and method for circulating fluid in a borehole

Wells – Processes – Cleaning or unloading well
Patent

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Apparatus and method for circulating fluid in a well bore

Wells – Processes – Cleaning or unloading well
Reexamination Certificate

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Apparatus and method for inflating packers in a drilling well

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate

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Apparatus with retractable cleaning members

Wells – Brushing – scraping – cutting or punching-type cleaners – Retractable on support while lowering
Patent

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Circulation tool

Boring or penetrating the earth – With means movable relative to tool below ground to stop... – Means comprises dropped element
Reexamination Certificate

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