Bottom Hole Pressure
Bottom hole pressure is used to represent the sum of all the pressures being exerted at the bottom of the hole. Pressure is imposed on the walls of the hole. The hydrostatic of the fluid column accounts for most of the pressure, but pressure to move fluid up the annulus also acts on the walls. In larger diameters, this annular pressure is small, rarely exceeding 200 psi (13.79 bar). In smaller diameters it can be 400 psi (27.58 bar) or higher. Backpressure or pressure held on the choke also increases bottomhole pressure, which can be estimated by adding up all the known pressures acting in, or on, the annular (casing) side. Bottomhole pressure can be estimated during the following activities;
Read more about this topic: Well Control
Famous quotes containing the words bottom, hole and/or pressure:
“Good manners, to those one does not love, are no more a breach of truth, than “your humble servant,” at the bottom of a challenge is; they are universally agreed upon, and understand to be things of course. They are necessary guards of the decency and peace of society.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
“The more supple vagabond, too, is sure to appear on the least rumor of such a gathering, and the next day to disappear, and go into his hole like the seventeen-year locust, in an ever-shabby coat, though finer than the farmer’s best, yet never dressed.... He especially is the creature of the occasion. He empties both his pockets and his character into the stream, and swims in such a day. He dearly loves the social slush. There is no reserve of soberness in him.”
—Henry David Thoreau (1817–1862)
“Under the pressure of the cares and sorrows of our mortal condition, men have at all times, and in all countries, called in some physical aid to their moral consolations—wine, beer, opium, brandy, or tobacco.”
—Edmund Burke (1729–1797)