SMITH DRILLING SYSTEMS L.L.C.

Crude Petroleum and Natural Gas Extraction

NAICS #211111 | This U.S. industry comprises establishments primarily engaged in (1) the exploration, development and/or the production of petroleum or natural gas from wells in which the hydrocarbons will initially flow or can be produced using normal pumping techniques or (2) the production of crude petroleum from surface shales or tar sands or from reservoirs in which the hydrocarbons are semisolids. Establishments in this industry operate oil and gas wells on their own account or for others on a contract or fee basis. Performing oil field services for operators on a contract or fee basis--are classified in Industry 21311, Support Activities for Mining; Refining crude petroleum into refined petroleum and liquid hydrocarbons--are classified in Industry 324110, Petroleum Refineries; and Recovering helium from natural gas--are classified in Industry 325120, Industrial Gas Manufacturing.

Support Activities for Oil and Gas Operations

NAICS #213112 | This U.S. industry comprises establishments primarily engaged in performing support activities on a contract or fee basis for oil and gas operations (except site preparation and related construction activities). Services included are exploration (except geophysical surveying and mapping); excavating slush pits and cellars, well surveying; running, cutting, and pulling casings, tubes, and rods; cementing wells, shooting wells; perforating well casings; acidizing and chemically treating wells; and cleaning out, bailing, and swabbing wells. Contract drilling for oil and gas--are classified in U.S. Industry 213111, Drilling Oil and Gas Wells; Operating oil and gas field properties on a contract or fee basis--are classified in Subsector 211, Oil and Gas Extraction, based on the activity; Performing geophysical surveying and mapping services for oil and gas on a contract or fee basis--are classified in Industry 541360, Geophysical Surveying and Mapping Services; Oil and gas pipeline and related structures construction--are classified in Industry 237120, Oil and Gas Pipeline and Related Structures Construction; and Site preparation and related construction activities on a contract or fee basis--are classified in Industry 238910, Site Preparation Contractors.

Mining and Oil and Gas Field Machinery Manufacturing

NAICS #33313 | This industry comprises establishments primarily engaged in manufacturing oil and gas field and underground mining machinery and equipment. Manufacturing offshore oil and gas well drilling and production floating platforms--are classified in Industry 33661, Ship and Boat Building; Manufacturing surface mining machinery and equipment--are classified in Industry 333120, Construction Machinery Manufacturing; Manufacturing coal and ore conveyors--are classified in Industry 33392, Material Handling Equipment Manufacturing; Manufacturing underground mining locomotives--are classified in Industry 336510, Railroad Rolling Stock Manufacturing; and Manufacturing pumps and pumping equipment--are classified in Industry 33391, Pump and Compressor Manufacturing.

Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers

NAICS #42381 | This industry comprises establishments primarily engaged in the merchant wholesale distribution of specialized machinery, equipment, and related parts generally used in construction, mining (except oil well) and logging activities. Establishments primarily engaged in the merchant wholesale distribution of oil well machinery and equipment are classified in Industry 423830, Industrial Machinery and Equipment Merchant Wholesalers.

Industrial Machinery and Equipment Merchant Wholesalers

NAICS #42383 | This industry comprises establishments primarily engaged in the merchant wholesale distribution of specialized machinery, equipment, and related parts generally used in manufacturing, oil well, and warehousing activities. Merchant wholesale distribution of specialized machinery, equipment, and related parts generally used in construction, mining (except oil well), and logging activities--are classified in Industry 423810, Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers; and Merchant wholesale distribution of supplies used in machinery and equipment generally used in manufacturing, oil well, and warehousing activities--are classified in Industry 423840, Industrial Supplies Merchant Wholesalers.

Building Material and Supplies Dealers

NAICS #4441 | This industry group comprises establishments primarily engaged in retailing new building materials and supplies.