Duhn Oil Tool, Inc.

Seaboard International Inc.

Other

Robert K Meek

Rex E Duhn

Gary A Card

One or more frac distribution towers are positioned on a well pad and receive high pressure frac fluid from a remote source including one or more pumps. The tower has an inlet and multiple outlets, each outlet having a valve to selectively supply frac fluid to one or more wells. The inlet and the outlets each have a centerline, and the outlets may all be located on the same side of a plane defined by the centerline of the frac distribution tower and the centerline of the inlet. Outlet valves may be oriented horizontally, vertically, or angularly between horizontal and vertical. The inlet and the outlets may have the same size and pressure rating, or the outlets may have a smaller size than the inlet, such that multiple wells may be fracked simultaneously. More than one frac distribution tower may be positioned on a well pad and connected to each other using a tee fitting so as to provide high pressure frac fluid to each tower, and from each tower to one or more frac trees on multiple wells.

Frac distribution tower

A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.

Wellhead isolation tool and wellhead assembly incorporating the same

A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A seal is formed between the second end portion and the tubular member. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.

Wellhead isolation tool and method of fracturing a well

A wellhead assembly is provided including a first tubular member, a hanger mounted within the first tubular member and an annular member coupled to the outer surface of the hanger. The assembly also includes a second tubular member mounted to the annular member and surrounding a portion of the hanger. A method is also provided for fracturing a well requiring coupling a tubing mandrel hanger to a casing, the hanger having a central bore, coupling an annular nut on a portion of the outer surface of the hanger, mounting a tubular member having a flange over the hanger and on the flange, and applying fluids though the bore formed though the hanger for fracturing the well.

Wellhead isolation tool, wellhead assembly incorporating the same, and method of fracturing a well

A wellhead isolation tool and a wellhead assembly incorporating such a tool are provided. The wellhead assembly has an annular assembly coupled to a well. The annular assembly may include a casing head coupled to the well and a tubing head mounted over the casing head. The wellhead isolation tool is suspended in the annular assembly. The wellhead isolation tool has a first end portion extending above the annular assembly and a second end portion below the first end portion within the annular assembly. A production casing suspended in the annular assembly and is aligned with the wellhead isolation tool.

Wellhead isolation tool

A coil tubing hanger system and a method of installing such system is provided. The coil tubing hanger system comprises a body having an axial opening there through. A slip bowl having a base and housing a slip that can be retained in a first position spaced apart from bowl base and a second position proximate the bowl base is fitted within the opening. The slip has inner teeth. Tubing is fitted within the slip and through the bowl while the slip is retained in the first position. The slip is then allowed to drop to the second position such that the slip teeth bite onto the outer surface of the tubing.

Coil tubing hanger system

A mandrel rotator is provided is mounted in a housing for coupling to a well casing head. The mandrel rotator comprises of an annular gear having external gear teeth and an axial opening. The annular gear is coupled to a mandrel outer surface, such that rotation of the annular gear causes rotation of the mandrel. A retainer limits or prevents axial movement of gear within the housing. A second gear is coupled to the annular gear for rotating the annular gear.

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Bakersfield, CA, United States of America

Robert K Meek