E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/02 (2006.01) E21B 17/042 (2006.01) E21B 21/10 (2006.01)
Patent
CA 2132458
In the oil and gas industry , wellbores are now commonly drilled horizontally through the oil or gas bearing reservoir rock . It is common to equip ("complete") the producing section with a special pipe (called a liner) which facilitates maintenance or enhancement of productive capacity . Since the producing section is so long (100 m to 2000 m) for horizontal wells in comparison to vertical wells (1 m to 20 m) , the conventional liner completion designs , which were primarily designed for vertical wells ,are often prohibitively expensive for horizontal wells. In response to this expense, many horizontal wells are left uncompleted ("open hole") or are completed with a simplified liner design , which compromises well performance . This invention is a low cost ported liner design which enables the following: Retrievability, reuse , clean outs of produced sand , hydraulic jetting of multiple simultaneous "perforations" , abrasive jetting of multiple simultaneous "perforations" limited entry stimulation or chemical soaks underbalanced operations , low torque and drag installation . The invention is essentially a specialized hole located in the liner couplings .
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