US 12,252,957 B2
Pressure-pulsing for effective mudcake removal
Rayan A. AlRabaei, Jeddah (SA); Abdulhamid N. AlSousy, Dhahran (SA); Akram R. AlBarghouti, Dammam (SA); and Mohammed H. AlKhaldi, Dammam (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jan. 27, 2022, as Appl. No. 17/649,121.
Prior Publication US 2023/0235645 A1, Jul. 27, 2023
Int. Cl. E21B 34/02 (2006.01); E21B 37/00 (2006.01); E21B 43/12 (2006.01)
CPC E21B 34/025 (2020.05) [E21B 37/00 (2013.01); E21B 43/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of clearing a mudcake in a wellbore, the method comprising:
(a) opening a first choke having a size of 8/64″, wherein the first choke is in fluid communication with the wellbore, such that a first pressure is created in the wellbore;
(b) closing the first choke;
(c) opening a second choke having a size of 16/64″ or 75/64″, wherein the second choke is in fluid communication with the wellbore, such that a second pressure is created in the wellbore, wherein the second pressure is different from the first pressure;
(d) closing the second choke;
(e) opening the first choke or a third choke, wherein the third choke has a size of 16/64″ or 75/64″ and has a different size than the first choke and the second choke; and
repeating at least steps of (a) opening the first choke, (b) closing the first choke, (c) opening the second choke, (d) closing the second choke, and (e) opening the first choke or the third choke until the mudcake is cleared.