E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 49/08 (2006.01) E21B 43/116 (2006.01) E21B 47/09 (2006.01)
Patent
CA 2315482
An early evaluation system for use in a cased wellbore (12) is disclosed. The apparatus (10) comprises a tool string (18) with a perforating gun (20) on the lower end thereof. Tool string (18) also including a packer (24), a control valve (26), a sampler (28) and a locating device (36). As the apparatus (10) is run into the wellbore (14), the locating device (36) is used to locate the tool string (18) with respect to the formation (16). A second control valve (44) may be disposed above the sampler (28) so that fluid may be pumped down the tool string (18) and back into the formation (16) when the control valve (44) is opened. In operation, the perforating gun (20) is fired after the packer (24) is set, so that fluid initially flows into the spent perforating gun (20), which acts as a surge chamber. Subsequently, a fluid sample is flowed into the sampler (28).
Halliburton Energy Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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