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Why do we care about Circulation rate while running liner?

List the main reasons why do we care about Circulation rate while running liner?

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Question ajoutée par Ramzi Ali , Consultant Drilling Fluids & Waste Management , self-employed
Date de publication: 2017/01/28
Ramin Babayev
par Ramin Babayev , Drilling Fluids Specialist , M-I Swaco a Schlumberger Company

To manage ECD. It's to safeguard against a kick or losses.

Imran Aslam
par Imran Aslam , Driller , Abraj Energy Services.

At first due to small annular clearance between them, we try to limit the ECD for lost circulation and getting kick. Limit the circulation rate so that to keep shear pin safe and not stuck in between where we don't need to install and inlast for better cement operation.

Kamel Elsayed
par Kamel Elsayed , Offshore Drilling Supervisor , Gulf of Suez Petroleum Company (GUPCO)

1- you have to limit circulation rate below the liner hanger setting pressure (shear bolts that release the hanger slips) to avoid shearing and setting the liner hanger accidentally while still RIH. ... (this should be taken care of during planning phase for the liner running & cementing job, .. drilling engineer should give you the maximum alloed circulating pressure, which must be below the minimum setting pressure for the hanger (each bolt shear pressure multiplied by the number of bolts)

- also this circulating pressure should vary along the way while RIH, as the liner goes deeper, you should need higher pressure to circulate thru the liner, so take care, the worst part is at the bottom.

- once the liner at the bottom & the liner hanger is ser, you are free to circulate but take care of the formation fracture pressure as mentioned in point #2.

 

2- Due to the big OD of the liner (compared to drill pipes), there is a relatively smaller clearance (annulus of liner), and this will give higher ECD than that while drilling. so if you used higher circulating rate, you risk fracturing the formation and having losses and even complete loss.

- of course mud parameters make huge difference in that regard... the highr mud rheology, the highrt the ECD.

 

3 - to avoid plugging the liner shoe / reamer shoe while RIH.

4- to simulate the pumping rate for the cement job.

5- to ensure liner hanger running tool is still attahced to the liner hanger.

Ammar Al obaidi
par Ammar Al obaidi , Workover and Completion supervisor , OilServ

1- Not excceding the liner setting pressure/ searing pins limit.

2- Reduce wash out effect on ball set and paker element.

dennis limbaga
par dennis limbaga , ASSISTANT DRILLER , TRANSOCEAN

Limit circulation rate while running in liner keep shear pin safe and not stuck and avoid plugging the liner shoe / reamer shoe while RIH.

Muhammad Amir
par Muhammad Amir , Night Tool Pusher , Weatherford Drilling International

more circulation rate will erode the ball seating area and liner can not be get set by hydraulic pressure because ball will not set and fall down from seating area.

mohamed fathy
par mohamed fathy , assistant driller , saipem

  •  to avoid plugging the liner shoe / reamer shoe while RIH.
  • to simulate the pumping rate for the cement job.
  • to ensure liner hanger running tool is still attached to the liner hanger.
  • to avoid stuk  

Fahdi Amin Mubarok
par Fahdi Amin Mubarok , MWD/LWD Field Engineer , Weatherford Drilling, Oil Gas Services

To avoid stuck of liner hinger.

Abdulla Fouad ِAhmed Osman Osman
par Abdulla Fouad ِAhmed Osman Osman , Drilling Supervisor , Abu-Dhabi Company

1-Prematurely  set Hydraulic liner hanger,

2-prematurely release hydraulic running tool,

3- swabbing packer element,

4-wash out the ball seat,

5- breaking the formation/lost circulation.

6- to Simulate the cement pumping rate

Majed Sinjar
par Majed Sinjar , Drilling Supervisor , Adnoc Onshore

for well control and not take any kick

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