Inventors:
Donald Glynn Sims - Houston TX, US
Michael James Sims - Tomball TX, US
Robert Frank Schmidt - Cypress TX, US
David Anthony Schmidt - Houston TX, US
John Walton McCaskill - Jersey Village TX, US
Assignee:
Expro Americas, L.P. - Houston TX
International Classification:
E21B 21/10, F16K 11/085, B01D 35/02
US Classification:
175209, 175218, 175312, 166229, 166 7512, 137547, 13762532, 13762547, 210422, 210446, 210459
Abstract:
The invention contemplates a strainer based upon a four-way, two-position rotary cylindrical plug valve having a hollow plug. The normal entry port for the sealing plug of the plug valve is a circular radial hole passing from the exterior of the plug into the interior cavity of the plug. The normal exit port for the sealing plug is a regular array of small holes across from and coaxial with the normal entry hole. The ports for the valve body are in two pairs positioned at 90° from each other, with the axes of the ports lying in the same transverse plane as the ports of the valve plug.