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...the line wear and stress. A weight indicator (16) is attached to the drill line so that the driller can measure the [[drill string weight|drill string]], [ ...the major component of the control system on a rig, and they are the last line of defence against a blowout. The BOPs are bolted to the wellhead and are n

;CH:choke ;CK:choke

* choke line http://www.glossary.oilfield.slb.com/en/Terms/c/choke_line.aspx * kill line http://www.glossary.oilfield.slb.com/en/Terms/k/kill_line.aspx

...ssible. Flow the well at a strictly constant rate (control with a variable choke or other control device). An alternative method for gas wells is to measure ...a. The “correct” semi-log straight line is indicated on these figures; the line is identified with the help of type curves (see [[Production histories]]).

...most the weight of the overburden, which it then parallels. In the case of line B, the increase of pressure above normal follows the aquathermal gradient ( ...out of the hole. The drill pipe pressure is carefully controlled with the choke. If the equilibrium drill pipe pressure is exceeded, the well may lose circ

...volume and type, fluid/proppant ratio, injection rate, treatment pressure, choke size, plug and perf versus sliding sleeves, and well spacing. All these fac *2005: Rule 318A modified to allow for section line and quarter section line wells (~20 acre spacing 27 townships)