Saturday, January 9, 2010


There is a production drill rig on a well location behind the knoll. At this point let me say I know just enough about oil and gas well drilling to be dangerous. With that in mind I will try to explain the processes in general. The drill rigs run 24/7 till the hole is done. Then it is moved to the next well location. Much heavy equipment is required to excavate and build the drill site with drill mud ponds. Many trucks hauling several loads are required to transport the drill rig, drill rods and drill casing to the site. Many truck loads of drill mud additives are required to drill the hole. It has been said that it takes 250 or more people working to keep a drill rig supplied and working. The typical sequence of a well would be as follows. This is after the paperwork of applying for leases and drilling permits and all of the additional paperwork. The dozers have moved the dirt and rock,sometime drilling and blasting rock is required, to level the site, mud pits to contain drill mud are excavated. They are lined with liner so they will not leak. A small drill called a "Rat Hole drill" will set up and drill thru the overburden and into bed rock. A casing is set in the hole to keep hole from caving in and prevent mixing of drill fluids with the ground water. A drill collar will be attached to the casing and all is ready for the big drill to move on the site. The large production drill will set up over the drill collar and blow out protectors are attached to handle any sudden pressures that might be encountered in the drilling process. The drill rig is powered by a large "Gen set" which runs on diesel and provides the electricity for the drill, and associated building that are used for offices and housing. If the drill site is too far from town, temporally living quarters are set up at the drill site. The iiving quarters are trailer like houses with large flat screen TVs and even hot tubs at som that are constructed on steel frames that can be winched onto a large truck and transported to the drill sites. The dismantling, moving and setting up of a drill rig can be done in a days time. A drill rig may be on a site for a few days or weeks depending on the depth of the hole and/or problems encountered. A common depth of around 10,000 feet in this area can be drilled in a week and then on to another hole. Some holes are much deeper and take longer time. It generally cost more than a million dollars to make the drill site, drill the well, fracture and bring into production a gas well. Some wells cost many million dollars.

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