- المجال: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
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A plot of p<sup>2</sup> versus time function used to analyze low-pressure gas-well drawdown and buildup tests. The square term arises from substituting a gas-law equation into the differential equations where required to account for fluid compressibility. This allows an approximation for the differential equations that approaches the linear form required to use the classical solutions of the diffusion equation.
Industry:Oil & gas
A platform on which surface multiphase pumps can be mounted and connected to subsea multiphase pumps.
Industry:Oil & gas
A planar crack penetrated by a well or propagated from a well by hydraulic fracturing with nonzero pressure drop in the fracture during production.
Industry:Oil & gas
A planar crack penetrated by a well or propagated from a well by hydraulic fracturing with zero pressure drop in the fracture during production.
Industry:Oil & gas
A piece of steel cable placed inside a logging head that is designed to break at a predetermined tension. If the logging tool becomes stuck in the borehole, there is a danger that the logging cable will break at surface, since this is the place of maximum tension. It is difficult to fish a long length of tangled cable in the borehole. The weak point is designed to break before the cable, so that the latter can be retrieved, leaving only the logging tool and head in the borehole.
Industry:Oil & gas
A pipe fitting with several lateral outlets for connecting flowlines from one or more wells. This connection directs flow to heater-treaters, separators or other devices.
Industry:Oil & gas
A pipeline that receives natural gas or oil from another pipeline at some specific connection point.
Industry:Oil & gas
A pipe-shaped housing that protects the firing head of a tubing-conveyed perforating gun. It is used to accommodate or deflect debris that might fall toward the firing head while running into the hole or while on depth before shooting.
Industry:Oil & gas
A phenomenon that occurs when the downhole pump rate exceeds the production rate of the formation. It can also be due to the accumulation of low-pressure gas between the valves. On the downstroke of the pump, the gas is compressed, but the pressure inside the barrel does not open the traveling valve until the traveling valve strikes the liquid. Finally when the traveling valve opens, the weight on the rod string can suddenly drop thousands of pounds in a fraction of a second. This condition should be avoided because it causes extreme stresses, which can result in premature equipment failure. Slowing down the pumping unit, shortening the stroke length or installing a smaller bottom hole pump can correct this problem.
Industry:Oil & gas
A phenomenon that occurs when gas enters the subsurface sucker-rod pump. After the downstroke begins, the compressed gas reaches the pressure needed to open the traveling valve before the traveling valve reaches liquid. The traveling valve opens slowly, without the drastic load change experienced in fluid pound. It does not cause premature equipment failure, but can indicate poor pump efficiency. A bottomhole separator or a gas anchor can correct gas interference.
Industry:Oil & gas
