Wireline anchor aids underbalanced perforating

05/14/2001
Unocal Thailand Ltd. has found that a wireline anchor can effectively reduce the potential of perforating guns being blown up or down the hole while perforating underbalanced in slimhole, monobore gas wells.The tool requires no special landing nipples or other completion hardware. Click here to enlarge imageIn October 1999, Unocal took receipt of the industry's first wireline perforating anchor tool that can be set independent of gun activation. Schlumberger developed the tool over a 5-month period for use in Unocal's monobore, high-temperature Gulf of Thailand wells.1Need for an anchorUnocal has been drilling in the Gulf of Thailand since the 1970s (Fig. 1). Operations in the ar...
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