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Depth in a well Oil Well Drilling Depth Reference Specifications with respect to certain datums In the oil and gas industry,  depth in a well  is the measurement, for any point in that well, of the distance between a reference point or elevation, and that point. It is the most common method of reference for locations in the well, and therefore, in  oil industry  speech, "depth" also refers to the location itself. By extension, depth can refer to locations below, or distances from, a reference point or elevation, even when there is no well. In that sense, depth is a concept related to  elevation , albeit in the opposite direction. Depth in a well is not necessarily measured vertically or along a straight line. Because wells are not always drilled vertically, there may be two "depths" for every given point in a wellbore: the  measured depth  (MD) measured along the path of the  borehole , and the  true vertical depth  (TVD) , the absolute vertical distance between the

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#Pipe_Displacement_Calculation حساب  حجم الطفلة من مواسير الحفر  Pipe displacement, normally in bbl/ft or m3/m, is steel volume  per length of steel pipe.  When we either pull out of hole or trip in hole for any kind of pipes such as drill pipe, casing or tubing, you should know how much fluid to displace steel volume. For example, when we pull out of hole, a trip sheet must be monitored all time. We must know how much fluid will fill the hole each stand of drill pipe pulled out. If the volume of displacement less than theoretical displacement value, we may have problem due to swabbing formation into wellbore. This article will demonstrate how to calculate plain pipe displacement with this following formula: Oilfield Unit Pipe Displacement in bbl/ft = (OD2 – ID2 ) ÷ 1029.4 Where; OD in inch ID in inch Where, OD is out side diameter of pipe in inch. ID is inside diameter of pipe in inch. This formula is for plain pipe diplacment such as casing and tubing. It is not for closed-end displ

The #BOP stack may be built in a variety of  configurations.  American Petroleum Institute (#API) Code to describe stack configurations is contained in API Bulletin #RP53.  The recommended component designation codes for blowout preventer arrangements are as follows: A = annular type blowout preventer G  = rotating head R = single ram type preventer with one set of rams, blind or pipe, as operator prefers Rd = double ram type preventer with two sets of  rams, positioned as operator prefers Rt = triple ram type preventer with three sets of rams, positioned as operator prefers CH = remotely operated connector attaching wellhead or preventers to each other CL= low pressure remotely operated connector attaching the marine riser to BOP stack S   = spool with side outlet connections for choke and kill lines M  = 1,000 psi (68.95 bar) rated working pressure #Components are listed reading upward from the bottom of the preventer stack. Blowout preventer stacks may be fully identified  by simple

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