Search results
Results From The WOW.Com Content Network
Feet of pipe (ft) = Volume of mud (bbls) / Capacity (bbls/ft) Capacity calculation is important in oil well control due to the following: Volume of the drillpipe and the drill collars must be pumped to get kill weight mud to the bit during kill operation. It is used to spot pills and plugs at various depths in the wellbore. [26]
Mishandling mud at the surface accounts for many instances of insufficient fluid weight. Such as opening the wrong valve on the pump suction manifold and allowing a tank of lightweight fluid to be pumped; bumping the water valve so more is added than intended; washing off shale shakers; or clean-up operations. All of these can affect mud weight.
The principle of a well kill revolves around the influence of the weight of a fluid column and hence the pressure exerted at the wellbore's bottom. P = h g ρ {\displaystyle P=hg\rho } Where P is the pressure at a specific depth, h, within the column, g is the acceleration of gravity and ρ is the density of the fluid.
Denser mud is then circulated into the wellbore down the drill string, up the annulus and out through the choke line at the base of the BOP stack through chokes (flow restrictors) until downhole pressure is overcome. Once “kill weight” mud extends from the bottom of the well to the top, the well has been “killed”.
This tubing can be used as a kill string for chemical injection. The tubing may have a “no-go” nipple at the end as a means of pressure testing. Pumping flow: the tubing and pump are run to a depth beneath the working fluid. The pump and rod string are installed concentrically within the tubing.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Returning mud "cut" by (i.e., contaminated by) gas, oil or water; Connection gases, high background gas units, and high bottoms-up gas units detected in the mudlogging unit. [22] The primary means of detecting a kick while drilling is a relative change in the circulation rate back up to the surface into the mud pits.
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.