What is a well completion?
Completion, in petroleum production, is the process of making a well ready for production (or injection). This principally involves preparing the bottom of the hole to the required specifications, running in the production tubing and its associated down hole tools as well as perforating and stimulating as required.
The primary purpose of production casing is to isolate the zone containing natural gas from other subsurface formations. It's also used to pump hydraulic fracturing fluids into the producing formation without contacting other formations along the wellbore.
- Typically, a borehole used as a water well is completed by installing a vertical pipe (casing) and well screen to keep the borehole from caving. This also helps prevent surface contaminants from entering the borehole and protects any installed pump from drawing in sand and sediment.
- The average well is up to 8,000 feet deep. The depth of drinking water aquifers is about 1,000 feet. The problems typically stem from poor cement well casings that leak natural gas as well as fracking fluid into water wells.
- The casing head pressure is the pressure on the casing, which is measured at the wellhead. Bottom hole pressure is the natural gas pressure at the bottom of an oil well, as opposed to casing head pressure, which is the pressure at the surface of the well.
Steel Casing Pipe, also known as encasement pipe, is most commonly used in underground construction to protect utility lines of various types from getting damaged. Such damage might occur due to the elements of nature or human activity.
- The term workover is used to refer to any kind of oil well intervention involving invasive techniques, such as wireline, coiled tubing or snubbing. More specifically though, it will refer to the expensive process of pulling and replacing a completion.
- While a slickline is a thin cable introduced into a well to deliver and retrieve tools downhole, a wireline is an electrical cable used to lower tools into and transmit data about the conditions of the wellbore. Usually consisting of braided cables, wirelines are used to perform wireline logging, as well.
- The Gauge Cutter is predominantly used for drifting the tubing string but also designed to remove scale, debris, paraffin wax etc. Reaching target depth with the Gauge Cutter confirms that the tubing string is clear prior to performing more complex tasks such as recovering or installing flow control devices.
Modern drilled wells reach greater depths, with a foot or two of casing above the well, a minimum of 18 feet of casing below the surface, if the well goes through bedrock, at least 5 feet of casing within bedrock.
- Groundwater, on the other hand, is found in underground aquifers, where it is naturally filtered through many layers of rock and sand. Reached by drilling wells, groundwater is fresher and cleaner than surface water sources like rivers.
- Use the well point method.
- Start a pilot hole. Using a post hole digger or shovel, dig a hole two feet deep.
- Install your well point. Well points are generally made of steel or any other hard metal, so that they can withstand being driven deep into the ground.
- Begin driving the well point.
- Add each extension of pipe.
- From Wikipedia, the free encyclopedia. Deep well may refer to: A water well, an excavation or structure created to access groundwater in underground aquifers. Deep well drilling, the process of drilling a well to a depth of 10,000 feet or more. Deep Wells, Nevada, a ghost town in Eureka County, Nevada.
Updated: 28th October 2019