Dresser Industries, Inc.

Norman W Read

Robert Kenneth Buckner

Donald E Ritchie

A unitary assembly (10); is disclosed for isolating a leak in a side pocket mandrel (12) between the tubing annulus (16) about a tubing string (14) and the interior (20) of the tubing string. The unitary assembly includes an upper packer (22), and a lower packer (24) interconnected by a tailpipe (26). The upper packer (22) is preferably set by a wireline tool and the lower packer is preferably set hydraulically. This eliminates the need for a drilling or workover rig to be setup over the well when patching a leak.

Wireline hydraulic isolation packer system

A dual bore well treating tool having a pressure operated valve therein that is useful in conjunction with a dual bore packer and with a dual bore on and off or connection tool. One of the bores through the on/off tool, the treating tool and the packer is utilized for producing oil and/or gas from the well bore, and a second bore is utilized for opening the valve and for simultaneously injecting a treating material into the fluid being produced.

Dual bore well treating tool

An improved flow control valve for oil and gas wells and the like that includes a simplified valve actuating member that converts rotation of the tubing string into reciprocal motion of the valve actuating member and into a pivotal movement of the valve between open and closed positions.

Flow control valve for use in oil and gas wells and the like

Apparatus for treating an isolated zone of a well bore includes primary and secondary tubing strings extending from the surface of the well releasably connected to a packer that has been set therein. The primary tubing string extends through the packer whereby the well can be produced or chemical can be injected to treat the isolated zone. The secondary string is of substantially smaller size and is arranged so that it is isolated from the primary tubing string which extends through the releasable connection and through the packer whereby inhibitors, diluents, and the like can be injected in the zone to be treated.

Well treating apparatus

The valve includes a tubular housing member that is connected in a string of a tubing that extends into an oil or gas well. The upper end of the tubular housing member is rotatable and is connected through actuators to a valve member that is pivotally supported in the tubular housing member. Rotation of the upper end of the tubular housing causes the actuators to move linearly and in opposite directions simultaneously pivot the valve member between open and closed positions. Pressure responsive means bias the seat toward the valve to maintain a fluid tight seal regardless of the direction of differential in pressure existing across the valve.

Flow control valve for use on oil and gas wells or the like

A well production apparatus for fluid production through a pair of downhole safety valves to both well tubing and the tubing annulus includes a packer with a dual bore head connected to the lower end of the tubing. Primary and secondary packer mandrels depending from connections with said head serve as conduits for directing production fluid to the safety valves with the secondary mandrel also serving as a conduit through which a power conductor extends for connecting with a motor beneath the packer. A set of hydraulically movable slips slidable between retracted and deployed positions are carried on the mandrels on opposite sides of a packing element and a setting cylinder secured to one of said packer mandrels defines a pressure chamber containing a setting piston which is movable from a retracted position to an extended position to compress said packing element and deploy said slips for anchoring said packer in the casing. A control pressure passage extension with one end connecting to said pressure chamber exteriorly of said primary packer mandrel and an opposite end connected to a control pressure line leading to the safety valve provides pressure fluid for setting the slips.

Subsurface safety valve system with hydraulic packer

An oilwell tubing tester for the in-place pressure-testing of oilwell tubing strings for leaks, utilizes a flapper valve, a valve seat, a three-piece sealing mechanism, and a sliding J-mandrel located inside the tester housing in abutting relationship with the flapper valve.

Oilwell tubing tester with trapped valve seal

An indexing valve assembly utilizes a mandrel having elastomeric seal means retained by a seal housing containing a seal island over which is slidably located a slotted indexing sleeve.

Seal means for valve assembly

Indexing valve mechanism

A two piece valve sleeve mandrel utilizes replaceable insert seal carriers having peripheral elastomeric sealing areas thereon which may be partially or fully pressure-balanced.

Growing community of inventors

Dallas, TX, United States of America

Norman W Read