Gefei

A successful wellbore cleanup is one of the most critical steps to ensure a trouble-free completion. Cleanup operations reduce the risk of formation damage and enhance well productivity by efficiently and meticulously planning out the removal of leftover drilling fluid residue and casing debris. In ...
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This past century has been the most pivotal in drilling technology advances with the most influential drilling professionals collaborating with literature, books, and computer programs. Despite these developments, the amount of information we are receiving can many times be overwhelming. Much of the ...
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A three-dimensional visualization of a wellbore trajectory is challenging, especially for multiple and multi-lateral wells. Calculating true vertical depth (TVD), dogleg severities, and the ability to see the well path in a 3D work space is important to avoid unforeseeable issues. These features hel ...
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Most wells are completed and treated through a tubing and packer system. Changes in temperature and pressure inside or outside the tubing will either cause tubing length change (free motion condition), or induce force in the tubing and on the packer (limited motion or anchored condition). In deep we ...
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A circulation sub or bypass system can assist an operation in reducing drilling costs associated with different types of hole conditions. Originally developed to enable the aggressive pumping of LCM materials, these types of tools have evolved to benefit many applications in drilling, completion, an ...
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Hydraulic fracturing is a very common technique in wells for shale gas, tight gas, tight oil, coal seam gas and hard rock wells. There has been an increasing trend towards multiple hydraulic fracturing as production declines. This well stimulation is usually conducted once in the life of the well an ...
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