US Patent No. 10,988,665

PERMEABLE AND DECOMPOSABLE PLUG FORMING RAPIDLY DEHYDRATING FLUID (RDF)


Patent No. 10,988,665
Issue Date April 27, 2021
Title Permeable And Decomposable Plug Forming Rapidly Dehydrating Fluid (rdf)
Inventorship Md Amanullah, Dhahran (SA)
Ali Radhwan, Anak (SA)
Assignee Saudi Arabian Oil Company, Dhahran (SA)

Claim of US Patent No. 10,988,665

1. A method to control lost circulation in a loss zone in a wellbore, comprising:introducing a rapidly dehydrating fluid (RDF) composition into the wellbore such that the RDF composition contacts the loss zone and reduces a rate of lost circulation into the loss zone, wherein the RDF composition consists of:
a carrier fluid;
a cellulosic viscosifier comprising an amount in the range of 3 weight % of the total weight (w/w %) to 4 w/w %;
a plurality of particles formed from date tree seeds, wherein the plurality of particles formed from date tree seeds comprises an amount of 4 weight % of the total weight (w/w %) to about 5 w/w % and each of the plurality of particles formed from date tree seeds has a size of 400 microns to 595 microns; and
a plurality of date tree trunk fibers, the date tree trunk fibers comprising fibers formed from date tree trunks, wherein the plurality of date tree trunk fibers comprises an amount of 7 weight % of the total weight (w/w %) to about 8 w/w %, wherein the RDF composition has a dehydration time of 1.15 minutes to 1.5 minutes at 100 pounds-per-square inch differential (psid) pressure.