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...the rest of the borehole by one (bottom hole) or two (straddle) inflatable packers. The tester valve is opened, creating a pressure drop in the tool which suc ...match the IHP within 5 psi as a check of the tool's accuracy (assuming the packers did not leak).

...well. The zone in question is sealed off from the rest of the wellbore by packers, and the formations' pressure and fluids are measured. Data obtained from a A drill stem test string consists of packers, a downhole shut-in valve, a safety joint, and pressure gauges ([[:file:dri

...gram of (a) a casing-tubing dual completion and (b) a completion with dual packers and dual tubing strings.

...gram of (a) a casing-tubing dual completion and (b) a completion with dual packers and dual tubing strings. ...e fluids from the wellbore. Information on Christmas trees, tubing spools, packers, and downhole equipment needed to produce the well should be carefully desi

* Isolating mechanical problems such as leaking pipes, leaking packers, and fluid movement in cement channels behind pipe

...then running guns below the production packer become sufficient. Guns and packers can be operated on wireline, if assembly weight allows it. When operators c

Mechanical problems such as failures of the cement, tubulars, packers, wireline components, safety valves, or [[artificial lift]] equipment are a

...urdon-tube recording pressure gauges, a set of flow valves, and one or two packers. The tool isolates the formation from the mud column in the annulus. When t

...y prone to such failure is the tubing, casing, rod string, downhole pumps, packers, gas lift valves, and plugs in the well bore ([[:file:production-problems_f

...ery 90106.</ref> The well was completed with an uncemented liner and swell packers with 11-stage stimulation every 152.4 m (500 ft), each with 49,895.16 kg (1