US 12,392,226 B2
Mechanical hold down with internal strainer
Chinmoy Nath, Midland, TX (US); and Christopher Valenzuela, Midland, TX (US)
Filed by Ravdos Holdings Inc, Missouri City, TX (US)
Filed on Mar. 25, 2024, as Appl. No. 18/615,844.
Application 18/615,844 is a continuation of application No. 16/965,159, granted, now 12,091,946, previously published as PCT/US2019/015373, filed on Jan. 28, 2019.
Claims priority of provisional application 62/623,366, filed on Jan. 29, 2018.
Prior Publication US 2024/0229612 A1, Jul. 11, 2024
Int. Cl. E21B 43/12 (2006.01); B01D 35/02 (2006.01); E21B 43/08 (2006.01)
CPC E21B 43/086 (2013.01) [B01D 35/02 (2013.01); E21B 43/121 (2013.01); E21B 43/127 (2013.01); B01D 2201/02 (2013.01); B01D 2201/4084 (2013.01)] 20 Claims
OG exemplary drawing
 
18. A mechanical hold down for engaging with a seat nipple, the mechanical hold down comprising:
a mandrel comprising:
a top edge surface and an external threaded region;
an interior bore extending longitudinally through the mandrel; and
a tapered section configured to engage a seat nipple;
a top bushing comprising:
a bushing interior bore extending longitudinally through the bushing;
an upper external threaded section;
an upper internal surface defining a first taper; and
a lower internal threaded section, the lower internal threaded section being threadedly engaged with the external threaded region of mandrel; and
an internal strainer assembly comprising:
an edge surface resting on the top surface of the mandrel; and
an upper edge surface defining a second taper, wherein the second taper is adapted to align with a strainer bushing positioned between the mandrel and the bushing, the strainer bushing comprising:
a lower first taper; and
a strainer affixed to the strainer bushing and extending longitudinally through at least a portion of the interior bore of the mandrel.