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Hydra-Jar AP Jar Frees Stuck Drillstring, Onshore Mexico

Published: 07/30/2015

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The Hydra-Jar AP jar freed stuck pipe successfully with a fring duration of approximately 50 hours, saving the operator valuable rig time.
For the 12 1/4-in hole section, a drilling jar was added to the BHA should the drillstring become stuck. Schlumberger recommended a Hydra-Jar AP double-acting hydraulic drilling jar, which is balanced to hydrostatic pressure through ports open to the wellbore, ensuring consistent hitting performance regardless of downhole pressure changes.
Location
Mexico, North America, Onshore
Details

Environment
Land

Toolsize, in
8

Hole size, in
12 1/4

Average flow rate, galUS/min [L/s]
704 [44.42]

Average pressure, psi [MPa]
3,212 [22.15]

Torque, ft.lbf [N.m]
5,314 [7,205]

Mud weight, lbm/galUS [g/cm3]
10.9 [1.3]

Approximate firing duration, h
50

Weight on bit, t [kg]
3–12
[2,722–10,886]

Depth in, ft [m]
2,625 [800]50

Depth out, ft [m]
6,562 [2,000]

Background
For the 12 1/4-in hole section, a drilling jar was added to the BHA should the drillstring become stuck. Schlumberger recommended a Hydra-Jar AP double-acting hydraulic drilling jar, which is balanced to hydrostatic pressure through ports open to the wellbore, ensuring consistent hitting performance regardless of downhole pressure changes.
Products Used
Hydra-Jar AP
Double-acting hydraulic drilling jar

Free stuck drillstem components during drilling or workover operations in vertical or deviated wells.
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