In petroleum production, the casing hanger is that portion of a wellhead assembly which provides support for the casing string when it is lowered into the wellbore. It serves to ensure that the casing is properly located. This is usually welded or screwed to the top of the surface casing string.
Similarly, it is asked, what is the surface casing?
surface casing. First, the surface casing protects fresh-water aquifers onshore. Second, the surface casing provides minimal pressure integrity, and thus enables a diverter or perhaps even a blowout preventer (BOP) to be attached to the top of the surface casing string after it is successfully cemented in place.
What is casing in drilling rig?
Casing is typically hollow steel pipe used to line the inside of the drilled hole (wellbore) and is essential for protection of groundwater and aquifers in a drilling operation. The existing industry standard for oil and gas casing was established by the American Petroleum Institute (API) ‡ in Specification 5CT.
What is a tubing hanger for?
A tubing hanger is a component used in the completion of oil and gas production wells. It is set in the tree or the wellhead and suspends the production tubing and/or casing. Sometimes it provides porting to allow the communication of hydraulic, electric and other downhole functions, as well as chemical injection.
What is the wear bushing?
Wear Bushing, Running, Retrieving and Testing Tools. Wear bushing is usually used to prevent casing head shoulder or tubing head shoulder from the damage during drilling operations. Running tool for wear bushing is used to send or retrieve wear bushing, with excellent reliability and safety.
What is a tubing head?
tubing head (n.) – Equipment attached to the casing spool used to hang the tubing (smallest casing string) and seal the annulus between the tubing and casing. The top spool on a wellhead assembly contains the highest pressure in the wellhead, and contains a load shoulder to hang the tubing hanger and tubing string.
What is a production tubing?
Casing and tubing. Casing and tubing strings are the main parts of the well construction. All wells drilled for the purpose of oil or gas production (or injecting materials into underground formations) must be cased with material with sufficient strength and functionality.
What is a production casing?
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.
What is tubing used for?
In the oil and gas industries, coiled tubing refers to a very long metal pipe, normally 1 to 3.25 in (25 to 83 mm) in diameter which is supplied spooled on a large reel. It is used for interventions in oil and gas wells and sometimes as production tubing in depleted gas wells.
What does coil tubing do?
The coiled tubing is injected into the existing production string, unwound from the reel and inserted into the well. Coiled tubing is chosen over conventional straight tubing because conventional tubing has to be screwed together. Additionally, coiled tubing does not require a workover rig.
What is through tubing?
Pertaining to a range of products, services and techniques designed to be run through, or conducted within, the production tubing of an oil or gas well. The term implies an ability to operate within restricted-diameter tubulars and is often associated with live-well intervention since the tubing is in place.
What is the slickline?
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.
What is a coiled tubing operator?
Coil Tubing Operator. The Coil Tubing Operator is responsible for using continuous coiled tubing to perform insertion tasks like pumping fluids down the well to stimulate the flow of oil or gas.
What is a coiled tubing job?
Coil Tubing Jobs. Coiled tubing is a continuous length of flexible pipe wound on a spool that is straightened prior to pushing into a wellbore. There are a number of well intervention operations that can be achieved via coiled tubing, and it is sometimes used as production tubing in depleted gas wells.
What is a well intervention?
A well intervention, or well work, is any operation carried out on an oil or gas well during, or at the end of, its productive life that alters the state of the well or well geometry, provides well diagnostics, or manages the production of the well.
What is a well workover?
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.
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.
What is a snubbing rig?
Snubbing is a type of heavy well intervention performed on oil and gas wells. It involves running the BHA on a pipe string using a hydraulic workover rig. Unlike wireline or coiled tubing, the pipe is not spooled off a drum but made up and broken up while running in and pulling out, much like conventional drill pipe.
What is a workover fluid?
1. n. [ Well Workover and Intervention] A well-control fluid, typically a brine, that is used during workover operations. Since the wellbore is in contact with the reservoir during most workover operations, workover fluids should be clean and chemically compatible with the reservoir fluids and formation matrix.
What is a completion fluid?
Well Completions] A solids-free liquid used to “complete” an oil or gas well. This fluid is placed in the well to facilitate final operations prior to initiation of production, such as setting screens production liners, packers, downhole valves or shooting perforations into the producing zone.
What is the casing shoe?
In oil drilling and borehole mining, a casing shoe or guide shoe is a bull-nose shaped device which is attached to the bottom of the casing string. A casing hanger, which allows the casing to be suspended from the wellhead, is attached to the top of the casing.
What is the casing of a well?
A slightly different metal string, called production tubing, is often used without cement in the smallest casing of a well completion to contain production fluids and convey them to the surface from an underground reservoir.
What is the casing pipe?
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.