There have been significant changes in technology in the production of oil since its first production as you will read more here. Considering the value of oil to our lives, it is suitable to review the changes that have followed its discovery. The ancient people in Mesopotamia used a hardened substance called bitumen to construct sailing vessels and put jewelry pieces together. In Egypt, it was used to solidify the famous pyramids. Bitumen, asphalt and motor led to increased curiosity about oil among people.
From this site, you find out that oil was first extracted by digging. At the time, oil was used as medicine and the Chinese also lit their lamps as well as warm their houses using this product. There was not much knowledge of oil and the people came up with myths about the earth releasing gases and liquids.
The next discovery to be made as you will find here, was the spring pole. The device as you discover more here, was attached to a tree which provided the required resistance to reach greater depth, was used by the Ruffner brothers to enhance salt extraction. Oil was still not the primary goal but the people believed it could serve several purposes. However when steam power was introduced, the brothers were able to drill salt at a faster rate. A Yale chemist Benjamin Silliman discovered more about how oil could be converted into kerosene that is used for lighting lamps. It is at this point that the society became interested in the commodity and commercial drilling began.
From this website, you will read more about how the need for oil increased significantly. The number of oil deposits discovered in the earth increased. However there were hard sediments that made drilling difficult hence the need for improved equipment. Thus the rotary whose drill head went deeper past the sediment without the need to clear the debris constantly was developed. One event that marked how effectiveness of the rotary drill in the process of oil extraction was observed in Texas when a rig struck a rock resulting into a lot of oil flowing to the surface. With the world war 1 coming around, the demand for oil rose, leading to increased competition which resulted in greater development of oil tools. The most successful development for the rotary drill was the ability to dig deeper.
At the moment as we learn more here, rotary rigs are still in use for extracting oil. Besides been in use, the equipment has had significant changes technologically to improve efficiency. From what you have read in this website, you can see that the rigs can do more work than they did in the past. For example ,as you see here is that one rig can drill multiple oil wells and even move on their own.