Robert J. Diehl
Engineering at Wagon Rd, Wallis, TX

4570942, Feb 18, 1986

Apr 22, 1985

6/725721

Robert J. Diehl - Wallis TX
F. Harold Hollister - Richmond TX
Danny S. Meyer - Richmond TX

Joy Manufacturing Company - Pittsburgh PA

F16J 1510, F16K 4100

277 12

A "fire-resistant" packing arrangement (30) for use with linear motion or rotary motion shafts (20) characterized by a stepped dual diameter packing chamber provided by successive enlargements of the stem bore (22). A primary packing assembly (31) disposed in the chamber section (20b) of smaller diameter and cross-sectional areas and located nearest the fluid pressure provides for sealing under normal temperature and operating conditions. A secondary packing assembly (32) in the larger diameter chamber section (20c) and fabricated of "high temperature" materials is adapted to maintain sealing effectiveness in the event of abnormally high temperatures. A packing support ring (35) disposed in the larger diameter chamber section (20c) intermediate the two packing assemblies and supportable on the shoulder (62) provided by the stem bore enlargement, supports the secondary packing (32) and in the event of a decomposition of the primary packing (51) induced by extreme temperature conditions permits the secondary "high temperature" packing to maintain a seal. A packing retainer ring (38) located at the outer end of the packing arrangement as an outer packing stop is axially adjustable to provide a preload energization of the primary packings.

4372563, Feb 8, 1983

Oct 26, 1981

6/315275

Robert J. Diehl - Wallis TX
William L. Godare - Rohnert Park CA
Frederic D. Wells - Shreveport LA

W-K-M Wellhead Systems, Inc. - Shreveport LA

F16J 1506, E21B 3312

277117

A packing support assembly (10) adapted to be sleeved about a well casing ("C"), or the like, and secured thereto without the need for piercing the casing wall or welding thereto. The support assembly (10) comprises an anchor ring (11) which is sleeved about the casing ("C") and secured thereto by a first fastening means in the form of a plurality of circumferentially located fastening means such as radial bores (22) and set screws (31). The anchor ring (11) is provided with flexible fingers (61) having ridged surfaces (16) which are also adapted to rip the external wall of the casing ("C"). The flexible fingers (61) are wedged inwardly to grip the casing ("C") by means of a retainer ring (71) which is threaded onto the exterior of the anchor ring (11) and provided with an internal wedging surface (75) which is slidably engageable with cooperating wedging surfaces (52) on the exterior of the flexible fingers (61) of the anchor ring (11 ). The gripping force is adjustable as determined by the degree of turning of the set screws (31) and the amount of rotation and threaded connection of the retainer ring (71) on the anchor ring (11). The upper annular edge (81) of the retainer ring is configured to support and retain an annular packing, or the like, thereon.

4291768, Sep 29, 1981

Jan 14, 1980

6/111760

Robert J. Diehl - Wallis TX

W-K-M Wellhead Systems, Inc. - Shreveport LA

E21B 3302

166315

A packing assembly is mounted in the annular space between a tubing hanger and a tubing head of a wellhead assembly. The packing is bottomed on a shoulder of the tubing hanger and energized after the tubing hanger has been fully seated within the tubing head by the injection of a lubricant or the like against an upper annular piston member which compresses the packing. The piston member is locked to the tubing hanger after the packing has been compressed between the facing annular surfaces of the tubing head and tubing hanger and the entire packing assembly then moves with the tubing hanger.

5050680, Sep 24, 1991

Mar 21, 1990

7/496683

Robert J. Diehl - Wallis TX
Roger S. Osborne - Houston TX
Jeff Elwood - Missouri City TX

Cooper Industries, Inc. - Houston TX

E21B 4301, E02D 2900

166356

An enclosed protective chamber for a subsea wellhead assembly includes a main body installed on the sea floor. Subsea wellhead apparatus is mounted in the chamber on top of a well. A pressure-containing lid is mounted on and sealed with respect to the main body such that chamber pressure is isolated from the subsea hydrostatic head. An inflatable, elongated, flexible storage tank or dracon is attached to the chamber through a conduit having a pressure-balanced relief valve therewithin. The dracon is attached to the conduit through a quick disconnect coupling and closure valve which permit ready attachment, removal, or replacement of the dracon. Under normal operating conditions the dracon is deflated. The dracon is preferably anchored to the sea floor. When a leak in the subsea wellhead assembly occurs, excess chamber pressure permits surplus fluid to enter and fill the dracon.

4384730, May 24, 1983

Sep 25, 1981

6/305578

Robert J. Diehl - Wallis TX

W-K-M Wellhead Systems, Inc. - Shreveport LA

F16J 1506, F16L 2500

277236

A wellhead sealing assembly comprising a metallic sealing ring (10) which is compressed and deformed by tubing hanger load and fluid pressure to establish metal-to-metal sealing contact with the tubing hanger (20) and the tubing head (30). The outer surface of the sealing ring includes an upper cylindrical surface (11) and a lower downward facing frusto-conical surface (16) which coact respectively, with the bore wall of the tubing head (30) and an upward facing frusto-conical shoulder (33) in the tubing head bore (32). It is also provided with an annular end surface (13) which is radially transverse to the ring axis and coacts with a corresponding downward facing shoulder (22) on the tubing hanger (20) which seats thereagainst. The metallic ring (10) also comprises inner annular surfaces in the form of an upward facing frusto-conical surface (15) and a lower cylindrical surface (12) which coacts respectively with a downward facing frusto-conical surface (23) and a cylindrical surface (24) on a reduced diameter section of the tubing hanger. When the tubing hanger is seated on the upper end surface (13) of the sealing ring (10), there is a 5. degree.