What changed in this filing

Oklahoma City and Tulsa, Oklahoma and Houma, Louisiana.

Downhole Technologies – Nunn, Colorado;

Millsap, Pleasanton and Midland, Texas;

and Clearfield, Pennsylvania;

in the United States;

and Aberdeen, Scotland.

Well Site Services – Red Deer, Canada;

and in the United States:

Houston, Kilgore, Midland, and Orange Grove, Texas;

Well Site Services – Houston, Kilgore, Midland, and Orange Grove, Texas;

New Iberia and Houma, Louisiana;

Casper and Rock Springs, Wyoming;

Williston, North Dakota and Renton, Washington.

Williston, North Dakota and Renton, Washington in the United States;

and Red Deer, Alberta, Canada.

Downhole Technologies – Nunn, Colorado;

Millsap, Fort Worth, Pleasanton and Midland, Texas;

and Clearfield, Pennsylvania in the United States;

and Aberdeen, Scotland.

Our principal corporate offices are located in Houston, Texas.

What changed 10-K