US 6,982,008 B2
Coiled tubing wellbore cleanout
Scott A. Walker, Calgary (Canada); Jeff Li, Calgary (Canada); and Graham Wilde, Calgary (Canada)
Assigned to BJ Services Company, Houston, Tex. (US)
Filed on May 02, 2005, as Appl. No. 11/120,803.
Application 11/120803 is a continuation of application No. 10/429501, filed on May 05, 2003, granted, now 6,923,871, filed on Aug. 02, 2005.
Application 10/429501 is a continuation of application No. 09/799990, filed on Mar. 06, 2001, granted, now 6,607,607, filed on Aug. 19, 2003.
Claims priority of provisional application 60/200241, filed on Apr. 28, 2000.
Prior Publication US 2005/0236016 A1, Oct. 27, 2005
This patent is subject to a terminal disclaimer.
Int. Cl. B08B 9/04 (2006.01)
U.S. Cl. 134—24 36 Claims
OG exemplary drawing
 
1. A method for cleaning fill from a wellbore, comprising:
disturbing particulate solids of the fill while running in hole (RIH) with a coiled tubing assembly by circulating a cleanout fluid through a nozzle adapted to provide an angled jetting action;
creating particle entrainment to form a slurry of particulate fill and cleanout fluid, by pulling out of the hole (POOH) while circulating the cleanout fluid through the nozzle;
controlling a pump rate of the cleanout fluid and POOH rate such that substantially all particulate solids of the fill are maintained uphole of the coiled tubing assembly during POOH, while circulating the cleanout fluid at a flow rate that is less than a flow rate required to maintain the particulate solids in continuous suspension in the slurry in the wellbore; and
re-entraining the particulate solids that have fallen out of suspension, so that substantially all particulate solids are maintained uphole of the nozzle.