Master Flo Valve Inc.

Emkade Distribution Inc.

Chad M Dannish

Larry J Bohaychuk

Patrick Rabby

Loren Kowalchuk

A cylindrical protection sleeve is insertable into the bore of a tubing hanger in a wellhead, and has a skirt that projects into the bore of the tubing hanger to cover the lift thread formed in the upper region of the hanger bore, thus shielding the lift thread from contact by frac fluid and proppant particles flowing through the hanger bore and preventing resultant damage to the lift thread. Optionally, an annular deflection lip may be provided within the bore of the protection sleeve's skirt to deflect the downward flow of proppant particles toward the center of the flow path through the hanger, and thus minimizing contact of proppant particles with the back-pressure valve (BPV) thread profile formed in the hanger bore below the lift thread, and preventing or reducing resultant damage to the BPV thread profile.

Protection sleeve for tubing hanger threads

A choke valve having flow trim components, namely a tubular cage and a flow collar or plug, and related components, designed and arranged for reduced fracturing. The invention includes a protective tubular sleeve, or insert cartridge in which the side ports are located to overlap with the intersection of axes of the inlet and outlet bores, but to avoid direct impingement of fluid along the axis of the inlet bore. In the cage, at least a pair of main flow ports are located to overlap with the intersection of the axes of the inlet and outlet bores, and are aligned with the side ports of the tubular sleeve or cartridge to communicate directly with the side ports. In this manner fluid may enter the choke valve through the inlet bore and pass through the main flow ports at reduced pressure and continue out through the outlet bore, without direct impingement on the side wall of the flow trim components.

Growing community of inventors

Edmonton, Canada

Chad M Dannish