Donald Vincent Robison

US Patent:

20180334890, Nov 22, 2018

Filed:

May 21, 2018

Appl. No.:

15/985368

Inventors:

- Houston TX, US
Donald Robison - Waller TX, US
Justin Johnson - Sheridan WY, US

International Classification:

E21B 43/12
F04B 47/12
E21B 34/14
E21B 34/08

Abstract:

The present invention is related to a bypass plunger. The plunger includes a plurality of flow ports, a cage including a seat, a flow restriction member positioned within the cage, a choke passageway extending between the seat and a lower end of the plunger. The cage is located proximate the flow ports. The flow restriction member is movable between a seated position and an unseated position in response to formation contents flowed into the wellbore from a reservoir. The flow restriction member is the unseated position when the plunger descends down a wellbore and is the seated position when the plunger ascends in the wellbore. The flow ports, cage, and choke passageway are in fluid communication when the flow restriction member is in the unseated position. In the seated position, the flow restriction member is in physical contact with the seat. This configuration provides a bypass plunger with controlled descent.

US Patent:

20180266220, Sep 20, 2018

Filed:

May 24, 2018

Appl. No.:

15/989103

Inventors:

- Houston TX, US
Donald ROBISON - Houston TX, US

International Classification:

E21B 43/12
F04B 47/12
E21B 34/06
F04B 31/00

Abstract:

Provided is an improved bypass durable dart plunger that descends faster in a hydrocarbon well, is capable of lifting more fluids and has a durable and replaceable clutch assembly. The various components of the durable dart plunger includes a sleeve, a dart body with a one or more flow ports (chokes) cut at right angles through the dart body, a pin and a replaceable clutch assembly (also referred to a retention assembly). The chokes can be of varying sizes. In one embodiment, the clutch assembly includes a plurality of clutch mechanisms wherein each mechanism includes a ball, a socket screw and a resilient spacer.

US Patent:

20170107803, Apr 20, 2017

Filed:

Dec 30, 2016

Appl. No.:

15/396188

Inventors:

- Houston TX, US
Donald ROBISON - Houston TX, US

International Classification:

E21B 43/12
F04B 47/12
E21B 34/06

Abstract:

Provided is an improved bypass durable dart plunger that descends faster in a hydrocarbon well, is capable of lifting more fluids and has a durable and replaceable clutch assembly. The various components of the durable dart plunger includes a sleeve, a dart body with a one or more flow ports (chokes) cut at right angles through the dart body, a pin and a replaceable clutch assembly (also referred to a retention assembly). The chokes can be of varying sizes. In one embodiment, the clutch assembly includes a plurality of clutch mechanisms wherein each mechanism includes a ball, a socket screw and a resilient spacer.