دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: according to the standyard of the API , the letters which indicate the steel grade on the bottom of the tool joint pin of the drill pipe in order to identify the extra weight drillpipe
clearly

n: the actual drilling pressure of the downhole measured by the survey instrument

casing pressure at depth – the true gas weight at depth.

n: a heavy, thick-walled tube, usually steel, used between the drill pipe and the bit in the drill stem to provide weight to the bit.

n: A heavy, thick-walled steel tuve that provides weight on the bit to improve penetration rates. A number of drill collar may be used between the bit and the drillpipe.

a very heavy wall pipe used to add weight over the bit during drilling.

n: a series of codes signed in the bottom of the outer join of the pipe that is used to indicate the nominal weight of each inch of the pipe with the same outer diameter

n: the weight in the fluid which is represented by the weight indicator when the pipe is hung on the hook not touching the bottom of the well

n: a method of detennining optimum weight on bit and overall bit performance. A given amount of weight is put on the bit and the drawworks brake is tied off so that no more weight is applied to the bit as it drills. The time it takes for the bit to stop drilling ahead with the given amount of weight is measured. Different weights are applied and the times are compared to determine which amount is best.

n: a method of testing drilling to define the rotate speed and the
pressure under which the speed is the fast and the

a method of controlling a kick in which the gas is circulated out of the well using the normal weight mud controlled with backpressure of a choke. The heavier mud needed to control the formation without the choke is then circulated into the well.

n: a device that controls the rate of penetration by maintaining a predetermined constant weight on the bit. Also called an automatic driller or automatic drilling control unit.

n: the equipment which controls the drilling speed without the controls of the driller

n: the special tools used to display ,record or alarm the character and parameter about the drilling such as weight pen,eight-pen recorder for drilling