What does swabbing a well mean?
1. vb. [Drilling] To reduce pressure in a wellbore by moving pipe, wireline tools or rubber-cupped seals up the wellbore. If the pressure is reduced sufficiently, reservoir fluids may flow into the wellbore and towards the surface.
What is a gas swab?
Swabbing is a process to remove fluids “off the production zone” from a gas or oil well. The operator raises the mast with sheave and aligns the mast with the centerline of a well. The operator lowers cable and tools into and out of a well via the winch drum and mast crown pulley or sheave.
What is slickline and swabbing?
About Us. We provide Multi-Line Slickline Wireline Trucks, 28+ Ton Pickers, and Swab Tanks to the oil and gas industry in Alberta and plan to expand to British Columbia. We are in the process of building a state-of-the-art swab rig to provide our customers with efficient and cost-effective swabbing services.
What is the immediate effect of swabbing?
Swabbing is a condition when the string is pulled out of the well and it creates temporary bottom hole pressure reduction. If the hydrostatic pressure reduction is large enough to create underbalance condition, the well will eventually flow.
What is a swab in microbiology?
Swabbing is the act of wiping a sterile swab, these can be conventional cotton bud tipped swabs or a larger sized sponge style, across the surface of something which appears clean. Sterile swabs should be supplied to you from the laboratory.
What are swab cups used for?
The swab cup is a rubber part on a special rod which forms a seal between the swab and the wall of the tubing/casing. These swab cups are used for a variety of swabbing applications including both light and heavy loads, as well as shallow and deep wells.
Why are throat cultures the gold standard for gas diagnosis?
Throat culture remains the gold standard for diagnosing streptococcal pharyngitis. Failure to isolate β-hemolytic streptococci in a carefully obtained and accurately interpreted throat culture rules out the diagnosis of streptococcal sore throat for practical purposes.
Can you swab cheek for strep?
Of the many potential simplifications of screening for and diagnosing streptococcal pharyngitis, swabbing the buccal mucosa using RADTs was found to be ineffective.
What is swab valve?
1. n. [Well Workover and Intervention, Well Completions] The topmost valve on a Christmas tree that provides vertical access to the wellbore.
What is swabbing and surging?
Surge is additional pressure due to pipe movement downward and swab is reduction of pressure due to upward movement of drill string. Bottom hole pressure is reduced due to swabbing effect. Bottom hole pressure is increased due to surging effect.
What is a swab test used for?
A nasal swab, is a test that checks for viruses and bacteria that cause respiratory infections. There are many types of respiratory infections. A nasal swab test can help your provider diagnose the type of infection you have and which treatment would be best for you.
How do you swab for bacteria?
Roll a clean cotton swab in your mouth and then lightly draw a squiggle over the gelled agar in the petri dish. Be sure to wipe the end of the cotton swab all over the surface to be tested and cover the entire end of the swab with invisible bacteria.
When do you swab a well for oil and gas?
When wells are first drilled, they are usually fractured by a pressurized liquid to help open up “production zones” where oil or gas can travel to. The next step is where the actual swabbing takes place. Swabbing rigs are then used to remove the fluids from the production zones.
How does a swabbing of a well work?
In short, swabbing is a form of “well control” that releases bottom hole pressure in order to “kick” the well off. When wells are first drilled, they are usually fractured by a pressurized liquid to help open up “production zones” where oil or gas can travel to. The next step is where the actual swabbing takes place.
How does a swab rig operator swab a well?
A swab rig operator drives to the well to be swabbed or serviced. The operators raises the mast with sheave and aligns the mast with the centerline of a well. The operator then lowers cable and tools in and out of a well via the winch drum and mast crown pulley or sheave. The swab tools are used to support the swab cups.
How are swab tools used in the oil industry?
The swab tools are used to support the swab cups. The tools are lowered into a well, down to the fluid level. Swab tools allow fluids to flow up through and past to above the swab cups, as the winch drum with cable lowers cable and tooling into the well into the fluids.