Method and apparatus for removing debris from a wellbore
AssigneeBaker Hughes Incorporated
InventorsJoseph F. Donovan, Michael J. Naquin
Life of this patent
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Abstract
The invention comprises a tool with at least one extending member which causes the fluids moving in the wellbore after perforation to increase in velocity. The velocity is further increased by an auxiliary flowpath which permits the addition of fluid from the surface or from elsewhere in the wellbore or formation to be pumped to mix with the other fluids being produced after perforation. The auxiliary fluid further increases velocity, thus improving the ability of the mixture of formation and auxiliary fluid to entrain debris and remove it from the wellbore.
Claims21
A tool for removing, at least in part, debris from a wellbore, comprising:
- an elongated body;
- means on said body for increasing velocity of fluids flowing into the wellbore by providing a restrictive flowpath which causes the increased velocity of the fluid to carry off debris away from said body;
- and
- auxiliary fluid feed means for introducing an auxiliary fluid adjacent said means for increasing velocity, to further increase velocity of the flowing fluid through said means for increasing velocity, as an assist to carrying off debris away from said body and out of the wellbore.
A method of removing debris from a wellbore, comprising the steps of:
- placing an elongated body having an extending member on its periphery in the wellbore;
- allowing formation fluid to flow into the wellbore;
- increasing the velocity of the fluid as it passes adjacent said member;
- adding an auxiliary fluid adjacent said body;
- further increasing the velocity of the mixture of the formation and auxiliary fluids as the mixture passes said extending member;
- entraining debris in the moving fluids;
- removing the debris from the wellbore.
Dependencies are inferred from the claim text.