John H Yonker, 826924 County Road 4064, Kemp, TX 75143

2003023, Dec 25, 2003

Jun 19, 2002

10/174699

Ralph Echols - Dallas TX, US
Tommie Freeman - Flower Mound TX, US
Patrick Rice - Plano TX, US
John Yonker - Carrollton TX, US

E21B023/01

166/382000, 166/207000, 166/230000

An internal support apparatus and method for providing support to a tubular structure that is positioned in a wellbore. The apparatus is insertable into the tubular structure to reside in close proximity with an interior surface of the tubular structure, make light contact with an interior surface of the tubular structure, or expand the tubular structure. Thereafter, the support apparatus can remain in the tubular structure indefinitely to provide support against collapse or further collapse and allow the tubular structure to remain in operation.

4039027, Aug 2, 1977

Feb 2, 1976

5/654520

Ronald K. Churchman - Plano TX
John H. Yonker - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 4100

166153

Disclosed is a pumpdown tool for a well, the tool including a housing having a circumferentially extending seal on its outer surface and having a circumferential centralizer to protect the seal while the tool is being run in the well tubing.

4039026, Aug 2, 1977

Jul 14, 1976

5/705348

John H. Yonker - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 706

1661175

A kickover tool for installing or retrieving well equipment from side pocket mandrels in which a centralizing device is ineffective as the tool is run and which has springs that move to a new position after this tool begins reverse movement in the well to kick the tool into a position to install or retrieve equipment when the tool reaches a side pocket mandrel.

5832998, Nov 10, 1998

May 3, 1995

8/433787

Kenneth L. Decker - Carrollton TX
John H. Yonker - Carrollton TX
Wallace G. Wilke - New Iberia LA
Jeffrey S. Walter - Duncan OK
James C. Tucker - Duncan OK
Kenneth W. McIntyre - Duncan OK
Michael L. Connell - Duncan OK
Kenneth D. Caskey - Duncan OK

Halliburton Company - Dallas TX

E21B 33127

166185

A resettable well stimulation tool is lowerable into a well bore on a length of tubing through which pressurized fluid may be forced into the tool to inflate a packer portion carried by the tool and then discharge a stimulation fluid into a portion of the well bore sealed off by the packer portion. During the inflation cycle of the tool pressurized fluid is forced downwardly into an annular tool body inflation chamber that communicates with an inflatable packer carried by the tool body. A perforated tube member coaxially carried in the inflation chamber serves to vertically distribute the inflation pressure along the length of the packer and assure its even inflation. In a straddle packer embodiment of the tool inflation and stimulation passages extend internally through the tool and are sealingly separated by an internal crossover structure, with the inflation passage being in communication with upper and lower packer members. The internal inflation passage eliminates the previous necessity of communicating the upper and lower packers with inflation tubing externally coiled around the tool body. A longitudinally intermediate portion of the tool body has a telescoping expansion joint portion to compensate for the longitudinal forces exerted on the body by inflation of the packers.

4103740, Aug 1, 1978

Jun 2, 1977

5/802732

John H. Yonker - Carrollton TX

Otis Engineering Corporation - Dallas TX

E21B 706

1661175

Disclosed is a well tool having a pawl for engaging a surface in a well. Once the pawl engages the well surface and has performed its intended function, it is rendered inoperative. The well tool is retrieved from the well and the pawl redressed. This abstract is neither intended to define the invention of the application, which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.

5195585, Mar 23, 1993

Jul 18, 1991

7/732054

Jack G. Clemens - Plano TX
John H. Yonker - Carrollton TX
Stewart H. Fowler - Plano TX
Charles C. Cobb - Frisco TX
William G. Boyle - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 3700

166222

A wireline retrievable jet cleaning tool (10) comprising an adapter axle (12), a longitudinally extending axle (16), and a nozzle housing (14) rotatably mounted around the axle (16), the nozzle housing having at least two longitudinally spaced-apart nozzle sections (18A, 18B) adapted to sweep jets of cleaning fluid over longitudinally spaced target areas in a well tool or tubular, each nozzle section (18A, 18B) preferably having at least one tangentially directed nozzle (44), at least one radially directed nozzle (48) and at least one obliquely directed nozzle (52). A longitudinally reciprocating jet cleaning tool (60) comprising a rotatable nozzle housing (64) adapted to rotate around and slide longitudinally along a fixed axle (66) responsive to increased fluid pressures is also provided.

4227573, Oct 14, 1980

Nov 16, 1978

5/961139

Joseph L. Pearce - Dallas TX
Thomas W. Ray - Plano TX
Donald F. Taylor - Dallas TX
John H. Yonker - Carrollton TX

Otis Engineering Corporation - Dallas TX

E21B 3312

166153

A piston for use as a TFL locomotive or well swab having a seal unit forming a fluid seal between the piston and the inner wall of a flow conductor or tubing string. The seal unit comprising at least one annular fin or lip extending radially from the piston. The annular fin or lip having an exterior portion formed from elastomeric material which is deformable to seal with the flow conductor and an interior portion formed from elastomeric material molded on wire mesh. The interior portion providing increased wear resistance and strength for the annular lip. In one version, the piston carries several individual seal units each having an annular lip.

4418756, Dec 6, 1983

Sep 8, 1981

6/299931

John H. Yonker - Carrollton TX
Henry P. Arendt - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 2308

166383

A pumpdown system in which the pistons providing for movement of the train into and out of the well do not travel down into the tubing below the wellhead and are connected to tools through reach rods extending down into the tubing. The cathead effect resulting from working around the loop with pistons is minimized by guides which substantially center the pistons in the loop and in the preferred form by the use of straight sections of the loop.