Dense phase is a favorable condition for transporting carbon dioxide (CO2) and natural gas as well as carbon dioxide injection into crude oil reservoir for enhanced oil recovery. Pipelines have been built to transport CO2 and natural gas [1] in the dense phase region due to its higher density, and this also provides the addedContinue Reading
In the August 2009 Tip of the Month (TOTM), it was shown that pumping power requirement varies as the crude oil °API changes. Increasing °API or line average temperature reduces the crude oil viscosity. The viscosity reduction caused higher Reynolds number, lower friction factor and in effect lowered pumping power requirements. Since the objective ofContinue Reading
During the life cycle of a crude oil pipeline the properties of transported oil change, because in gathering systems the produced oils come from different wells. New wells may be added or some wells may go out of production for maintenance and repair. Production rates during the life of wells vary, too. In addition theContinue Reading
Written on May 1, 2009 at 10:07 pm, by Joe Honeywell
One of the most important physical properties of a gas is the ratio of specific heats. It is used in the design and evaluation of many processes. For compressors, it is used in the design of components and determination of the overall performance of the machine. Engineers are frequently asked to evaluate a compressor performanceContinue Reading
The formation of hydrates in processing facilities and pipelines has been a problem to the natural gas industry. Whether the problem occurs in transportation or processing, hydrate formation can cause shutdowns and even destruction of valuable equipment. Because of these devastating and often costly consequences of hydrate formation, methods have been applied to prevent hydrateContinue Reading
In the February 2007 tip of the month (TOTM), Joe Honeywell [1] presented a procedure for calculating fluid pressure drop for liquid in a piping system due to friction. Continuing Honeywell’s TOTM, we will outline procedures for calculation of friction losses in oil and gas pipelines. From an engineer’s point of view the question may arise “howContinue Reading
There are a few computer tools designed specifically for modeling and analysis of complex multiphase systems such as PipePhase, PipeSim, OLGA, and etc [1]. Modeling and simulation of multiphase system, even under steady-state condition, is complex. In the June Tip of the Month (TOTM), we illustrated how the process simulation programs can be used toContinue Reading
As gas moves through a pipeline its pressure and temperature change due to the frictional loss, elevation change, acceleration, Joule-Thompson effect, and heat transfer from the surroundings. Due to pressure and temperature change, liquid and solid (hydrate) may also form in the line which in turn affects the pressure profile. Modeling and simulation of multiphaseContinue Reading
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Categories: Gas Processing, Pipeline
Written on February 1, 2007 at 9:13 pm, by Joe Honeywell
Introduction Engineers are frequently asked to calculate the fluid pressure drop in a piping system. Many software programs are available for solving complicated hydraulic problems; however’ they can be complex and difficult to use. In addition, there are many tables or shortcut methods that give adequate answers but they usually apply to predefined conditions whichContinue Reading
This Tip of the Month illustrates the impact of pipe insulation for natural gases being transported by pipeline. As the natural gases move along the pipe its pressure and temperature change due to the Joule-Thompson effect, frictional loss, elevation change, acceleration, and heat transfer to or from surroundings. Due to pressure and temperature change, liquidContinue Reading
