Apparatus and method for controlled deployment of...

Apparatus and method for gravel packing a horizontal open...

Artificial lift well apparatus

Compact double screen assembly

Divalent ion tolerant aromatic sulfonates

Double walled screen-filter with perforated joints

Double walled screen-filter with perforated joints

Drilling tool

Filter for subterranean use

Filtering device, especially for use as a well screen filter

Filtering media for controlling the flow of sand during oil well

Flow controlling safety valve

Gas storage well safety valve apparatus

Injection sub for dual tube drilling

Low profile dual screen prepack

Method and apparatus for attaching well screens to base pipe

Mud saver valve

Mud saver valve

Permeable isolation sectioned screen

Pre-packed well points