drilling machinery

Table of Contents

Introduction References & Edit History Related Topics

Images

oil-drilling rig

Discover

Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society

12 Novels Considered the “Greatest Book Ever Written”

Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

7 of the World’s Deadliest Plants

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

Internet http://www blue screen. Hompepage blog 2009, history and society, media news television, crowd opinion protest, In the News 2009, breaking news

Who Invented the Internet?

drilling machinery: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Photos

oil-drilling rig

See All Images →

Topics

rock drill drifter drill hammer drill piston drill rotary drill stoper drill air drill machine drilling typesetting machine sawing machine sewing machine calender farm machinery knitting machine Fourdrinier machine spinning jenny spinning mule carding machine

Key People

Alfred Brandt

German engineer

Germain Sommeiller

French engineer