SINGLE-TRIP DOWNHOLE DEVICE EQUIPPED WITH MEANS OF MINIMISING SAND INGRESS Russian patent published in 2010 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil and gas well drilling and completion, and can be used in hydrocarbon production or fluid pumping in a well. The device comprises a pipe equipped with a means of minimising sand ingress and a temporary partition primarily keeping and then passing a fluid flow through said means of minimising sand ingress, and a drilling tool with a rotating drill bit enabling the pipe to advance in the well while being drilled with the drill bit. The means of minimising sand ingress comprises at least one tubular member selectively pulled out in a radial direction and equipped with a screened pipe, while the temporary partition is mounted in the pulled out tubular member and designed so that when pulling out the tubular member from the pipe and filling the pipe on-the-site with a sealant supplied therethrough, the fluid flow is kept through the tubular member with the screened pipe, and after setting of the sealant, to pass the fluid flow through the tubular member with the screened pipe and the pipe.

EFFECT: invention provides well drilling and completion for fewer trips.

21 cl, 6 dwg