دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A sponge-like multi-aperture product by processing iron oxide specially.which used to protect drill string from hydrogen sulfide corrosion.

One of the oldest and simplest logs. Measures voltage between formations and the fluid in the wellbore. Potential differences arise due to the differences between salinity of the formation and the wellbore fluids. SP is used for qualitative permeability,

v: 1. to move the drill stem up and down in the hole over a short distance without rotation. Careless execution of this operation creates pressure surges that can cause a formation to break down, resulting in lost circulation. 2. to force a wireline tool or tubing down the hole by using a reciprocating motion. 3. to begin drilling a well;i.e., to spud in.

n: To start the well drilling process by removing rock ,dirt and other sedimentary material with the drill bit.

to begin drilling.

n: an oil pipeline that picks up oil from the gathering lines of several oilfields and delivers it to a main line or bunk line. spurt loss n: the initial loss of drilling mud solids by filtration, making formations easier to drill. See filtration loss, surge loss.

n: The flux of fluids and solids which occurs in the initial stages of any filtration before pore openings are bridged and a filter cake is formed .Also called surge loss.

the initial loss of fluids from a mud or frac fluid, before the walk cake can be formed.

abbr: Saybolt Second Universal.

n: an instrument to measure the amount of voltage needed to break down invert emulsions.

n: 1. a tool placed on a drill collar near the bit that is used, depending on where it is placed, either to maintain a particular hole angle or to change the angle by control- ling the location of the contact point between the hole and the collars. See packR:d-hole as- sembly. 2. a vessel in which hydrocarbon vapors are separated from liquids. 3. a fractionation system that reduces the vapor pressure so that the resulting liquid is less volatile.

n: A downhole tool which has minor interspace with borehole,usually be fixed on the drill string.

n: a primary cementing operation in which cement is pumped into the well in a series of operations or stages. stage separation n: an operation in which well fluids under pressure are separated into liquid and gaseous components by being passed consecutively through two or more separators. The operating pressure of each succeeding separator is lower than the one preceding it. Stage separation is an efficient process in that a high percentage of the light ends of the fluid are conserved.

n: Seperating the cementing work into two sections or multisections work.

a alternate path device that allows access into the annulus when shifted. Used in two stage cementing operations to pump the upper job.