Peter Sweeny, building on Robert Beart's earlier design, made a huge advancement in rotary drill technology, enabling almost continuous drilling. His new design also improved on hole cleaning. .
Charles Burleigh, John W. Brooks, and Stephen F. Gates patented a mechanical drill meant to be used on the Hoosac tunnel: the compressed air Burleigh drill. The tunnel spurred several innovations in drilling technology, including the earlier Couch/Fowle drill.. .
Edward A.L. Roberts was awarded a patent in November 1866 for what would become known as the Roberts Torpedo, a device for increasing. .
Until were developed in the late 19th century, the main method for drilling rock was muscle power of man or animal. The technique of oil drilling through or has its origins dating back to the ancient Chinese Han dynasty in 100 BC, where percussion drilling was used to extract natural gas in the Sichuan province. Early oil and gas drilli.
[pdf] 
The company representative or rig drilling supervisor is hired by the operating oil drilling company and is responsible for all phases of drilling operations and for all needed tools and services such as casing, drilling mud, logging, and cementing. Upon arrival at a rig site, contact the company representative. .
The tool pusheris in charge of the drilling rig and crew members needed in the drilling operations. He generally has good experience in drilling operations and relevant equipment. .
He is considered the next highest level of authority on the rig after the tool pusher. Drilling rig Drillers personnel mainly work on shifts, and each is responsible for his shift. The driller operates the controls on the drilling rig floor. He also raises and lowers the drill string,. .
In general, roughnecks in drilling rigs are the personnel who perform making up and breaking out the pipe joints. They also mainly work on the rig floor and keep a steady supply of drill pipes to connect to the drill string. They also help maintain & fix other equipment. .
The next man in line under the rig driller is the derrickman. He has enough experience to help or relieve the driller. During a pipe tripping out of the hole, he will work in the drilling derrick or rig mast, racking the stands of drill pipe, drill collars, Heavy weight drill.
[pdf] 