Jerry Lee Dobbs

US Patent:

20080041579, Feb 21, 2008

Filed:

Aug 15, 2006

Appl. No.:

11/504404

Inventors:

Jerry W. Dobbs - Skiatook OK, US

International Classification:

E21B 43/00

US Classification:

166105

Abstract:

A tool which connects the last sucker rod of a sucker rod string to a downhole pump has a circularly cylindrical cylinder and piston so that the piston slides reciprocally and rotates freely within the cylinder. However, the closed upper end of the cylinder and the upper face of the piston have a cooperable tongue and groove which prevent relative rotational motion of the piston in the cylinder when the tongue is engaged in the groove so that the tool can be disconnected from the pump in response to rotation of the string at the uppermost stroke of the plunger to engage and turn the tongue and groove.

US Patent:

52243656, Jul 6, 1993

Filed:

Aug 10, 1992

Appl. No.:

7/927466

Inventors:

Jerry L. Dobbs - Sand Springs OK

International Classification:

E05B 1920

US Classification:

70394

Abstract:

A side bar lock decoder has a pair of guide plates laminarly arranged between a pair of side plates. Key portions of the plates have notches spaced for alignment with the lock wafers. Narrow passages between the guide plates extend from each of the notches to the edges of the base portions of the plates at approximately normal fingertip positions when the base portions are hand held. Wires slidably disposed in each of the passages extend from an outer end of each of the notches beyond the grip edges. One end of the wires abuts one of the wafers when the wafers and the notches are aligned. Springs, bias each of the wires toward a threshold reference position within the notches. Plungers, one connected to each of the wires, extend beyond the grip edges, are independently biased away from their respective edges by the springs. One or more housings secured to the laminar plates have at least one chamber therein for guiding the movement of each of the plungers during manipulation. Windows in the housings allow viewing of the depth of each plunger in its housing and at least one graduated scale on each housing, corresponding to the graduated scale of wafer depths of the lock, indicates the position of each plunger in relation to its threshold reference position when the wafers are shifted into the "open lock" condition.

US Patent:

60680520, May 30, 2000

Filed:

Apr 16, 1998

Appl. No.:

9/061391

Inventors:

Jerry W. Dobbs - Skiatook OK

International Classification:

E21B 4300
F04B 2104

US Classification:

1661052

Abstract:

A tool which eliminates the need for "tapping" in downhole reciprocating pump applications is connectable between the last sucker rod of a sucker rod string and the downhole pump. The tool has a cylinder with a closed end and an internal annular seat proximate an open end houses a piston whch reciprocates slidably within the cylinder and is free to rotate within the cylinder. The travel of the piston is limited in one direction by the closed end of the cylinder and in the opposite direction by the seat. The closed end of the cylinder is externally adapted for connection of the tool between the last sucker rod of the sucker rod string and the pump and the piston has a portion extending through the open end of the cylinder which is also adapted for connection of the tool between the last sucker rod of the sucker rod string and the pump. At least one aperture is provided through a closed end side wall of the cylinder and through an open end side wall of the cylinder so that well fluid can be vented from the cylinder as the piston reciprocates.

US Patent:

20140086681, Mar 27, 2014

Filed:

Nov 27, 2013

Appl. No.:

14/092326

Inventors:

Jerry W. Dobbs - Skiatook OK, US

International Classification:

E21B 17/02

US Classification:

403375

Abstract:

A tool which connects the last sucker rod of a sucker rod string to a downhole pump has a circularly cylindrical cylinder and piston so that the piston slides reciprocally and rotates freely within the cylinder. However, the closed upper end of the cylinder and the upper face of the piston have a cooperable tongue and groove which prevent relative rotational motion of the piston in the cylinder when the tongue is engaged in the groove so that the tool can be disconnected from the pump in response to rotation of the string at the uppermost stroke of the plunger to engage and turn the tongue and groove.