Method and apparatus for gravel packing wells

Details Method and apparatus for gravel packing wells Method and apparatus for gravel packing wells

E - Fixed Constructions

21

B

166/9

E21B 33/00 (2006.01) E21B 43/04 (2006.01) E21B 43/08 (2006.01)

Patent

CA 1055390

ABSTRACT OF THE DISCLOSURE The annular passage defined by the interior of a perforated liner and the exterior of a stinger pipe extending through the liner is substan- tially restricted so that the resistance to flow in the annular passage is increased sufficiently to maintain high fluid flow velocity outside the liner during gravel packing. The increased flow velocity prevents the premature settling of gravel and stabilizes the formation of gravel dunes in the wellbore annulus, thereby significantly increasing gravel packing efficiency in inclined wells. The proper flow restriction can be obtained using a wide diameter stinger pipe. -1-

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