lost circulation

lost circulation

[′lȯst ‚sər·kyə′lā·shən]
(petroleum engineering)
A condition that occurs when the drilling fluid escapes into crevices or porous sidewalls of a borehole and does not return to the collar of the drill hole. Also known as lose returns; lose water; lost returns; lost water.
References in periodicals archive ?
'The TerraSphere service delivers geological and geomechanical data that not only saves logging time and related rig costs, but also reduces the potential risk for lost circulation of drilling muds into formation fractures.'
"It was spring of 2015 and I recall working in the yard when I could only work for one or two minutes and had to rest for five to 10 minutes because I lost circulation. Weeks later, I remember getting in the car.
DOEs Geothermal Technologies Office (GTO) will fund projects that will focus on improving geothermal drilling efficiency and cost reduction by addressing two of the most significant barriers: state of stress and lost circulation events.GTO plans to provide funding in two topic areas Development of technologies for characterizing, monitoring, and predicting state of stress for geothermal exploration and drilling
He said: "My dog fell really ill, unfortunately it couldn't eat its food, it got put on a glucose drip and got fed through its paw and when they took the drip out the paw got infected, and when they bandaged it up it was too tight and it lost circulation and its paw was infected.
It absorbs hundreds of times its weight in water and is used primarily as a lost circulation material for HDD.
The transaction includes New Fluid Solutions' line of drilling fluid additives, including lost circulation materials, emulsifiers, lubricants and shale inhibitors used in both onshore and offshore drilling operations.
"The 500th run of the DAV MX, in particular, cured 400 bbls per hour losses for an operator by allowing more than 400 bbls of coarse lost circulation material through.
can process raw hemp which can be used to make paper, fabric, cellulose plastics, materials used extensively in well drilling to prevent lost circulation, material for toxic spill cleanup; and, highly insulating building products such Hempcrete, to name a few.
Aged just eight months old, little Noah's tiny body was ravaged with meningitis septicaemia after he fell ill at home and in the critical days that followed whilst trying to battle the virus, his body lost circulation to his extremities causing some of the tissue to die.
ST-1 had recorded flow rates averaging 1,290 barrels per day including oil to surface before the test string was blocked by lost circulation material.
- Drilled 8 1/2" hole to 2,821.8mMDRT - lost circulation in Baong sands, treated zone with LCM