Operation Sequence:

  • Circulate prior cement job: Q= 400 lpm, SPP 630 Psi.
  • Perform 4 1/2" liner cement job

* pump 2m3 diesel+7 m3 spacer+ 10, 94 m3 cmt slurry

* displace with 1,6 m3 of water+ 11,9 m3 of mud (using cmt unit) --got first bump @ 1200 psi.

* got final bump and test liner column @ 3500 psi for 10 min -ok-

* bleed off,no return.

* got 100% return while cementing & displacement.

  • set packer
  • Pick up 12m to circulate excess cement (2 649,0-2 649,0).
  • direct circulation

* Q= 460 lpm,spp =1200 psi

* dumped 02m3 gasoil + 07m3 spacer + 4m3 cement + 03m3 contaminated mud with cement.

  • try to pooh w/setting tool, we got stuck@2637m

* try to rotate negative

* work string up & down severel times, got 0.4m success (max over pull= 75ton).

  • work string up & down severel times -no success- (max-over pull=75 ton)

* q= 700 lpm,spp 2400-3000psi

* perform reverse circulation with different flow rates ( 170-415 l/min) , p=(300-

2250) return 100%

* reverse circulation with q= 500 l/min pressure up to 3200psi we can't circulate

  • reverse circulation

*Q= 300 lpm,spp 2100 psi.

  • pump 03m3 gasoil + 03m3 (low mud & hi-vis) pill & circulate

* q= 400lpm, spp=1500psi

* observed considerable volume of cutting after the hi-vis circulation in shale

Shaker.

  • unscrew & l/d one single dp 3 1/2'' & cmt unit head

* connect top drive to string.

  • work on stuck pipe up & down with top drive - no progress-

* Circulate Q= 700lpm, SPP=2450Psi

* prepare (heavy mud & hi-vis) pill.

  • PUMP 03m3 Gasoil + 03m3 (heavy mud & hi-vis) pill & CIRCULATE

* Q= 400lpm, SPP=1500Psi

* Observed considerable volume of cutting after the HI-VIS circulation in shale

Shaker.

  • work on stuck pipe up & down with top drive (max-over pull= 75 ton)-no success

* try to rotate several times, observed high torq (rotary table stoped

after 05trs)

* q= 700 lpm,spp 2400-2800psi.

  • PUMP 03m3 (heavy mud & hi-vis) pill & CIRCULATE

* Q= 400lpm, SPP=1500Psi

* Observed poor volume of cutting after the HI-VIS circulation in shale shaker.

  • Try to rotate several times (adjust limit torque@ 10 000 lb*ft)

* observed high torque (rotary table stoped after 09 trs)

* Sometimes work string up & down - no success-

  • successively try to rotate & work on stuck pipe up & down

-no success-

* adjust limit torque @ 14000 lbft and rotate (table stoped after 20 trs)

* max-over pull= 75 ton.

  • continue work on stuck pipe up & down (max-over pull= 75 ton) -no

success-

* q= 700 lpm,spp 2400-2800psi

  • Circulate hi-vis pill prior acid job

* pump 03m3 (heavy mud & hi-vis) pill

* q= 600lpm, spp=2500psi

* connect & test cmt line@3000psi

  • Pump acid plug n°1 as program with over pull 70t -no success-

* Pump 1 m3 of spacer

* Pump 5 m3 of acid

* Pump 1 m3 of spacer

* displace with 5 m3 of mud d=1.02sg

* displace every 15 min with 0.5 m3 of mud

* work on stuck pipe up/down & try to rotate -No success.

  • Circulate & evacuate acid plug n°1 with work on stuck pipe up & down - in progerss.
  • continue circulate & evacuate acid plug n°1

* circulate with q= 400 lpm, pressure increase f/2400psi t/3100 psi, reduce flow

rate to q= 150 lpm, p=2900psi

* get contaminated mud with cement (dumped=3m3).

  • Pump 03m3 (heavy mud & hi-vis) pill & circulate

* Q= 400 lpm, P=2900psi.

  • Pump acid plug n°2 with over pull 70t -no success-

* Pump 1 m3 of spacer

* Pump 5 m3 of acid

* Pump 1 m3 of spacer

* displace with 5 m3 of mud d=1.02sg

* displace every 15 min with 0.5 m3 of mud

  • waiting for acid effect

* Work on stuck pipe up/down (max-over pull= 75 ton) & try to rotate -no

Success.

  • Circulate & evacuate acid plug n°2 with work on stuck pipe up

& down

* q= 412 lpm, p=2900psi

* get contaminated mud with cement (dumped= 3m3).

  • PUMP 03m3 (heavy mud & hi-vis) PILL & CIRCULATE

* Q= 450 lpm, P=2450psi.

  • work on stuck pipe up & down (max-over pull= 75 ton) -no success-

* try to rotate several times, observed high torque.

* q= 500 lpm,spp 2400-2800psi.

  • Work on stuck pipe up/down (max-over pull= 60 ton) & try to rotate -no success.
  • pump 03m3 (heavy mud & hi-vis) pill & circulate

* q= 460 lpm, p=2300psi

* observed hard cement cutting (size: 2-5 mm) at shale shakers.

  • Continue work on stuck pipe up/down & try to rotate –nosuccess –
  • pump 03m3 (heavy mud d=1.70sg & hi-vis) pill & circulate

* q= 420 lpm, p=2500psi

* Hard cement cutting at shale shakers.

  • work on stuck pipe up & down (max-over pull= 60 ton) -no success-

* try to rotate several times - negative.

* q= 500 lpm,spp 2400-2900psi.

  • work on stuck pipe up/down (max-over pull= 60 ton) & try torotate -no success –
  • Perform mechanical back off.

* Weight string= 73t

* torque string @10000 lbs*ft

* apply left hand torque progressively to 10200 lbs*ft

* string unscrewed @10200 lbs*ft

  • Hook load decrease f/73ton t/32ton, (lost 41t).
  • SCREW STRING -OK -

* Pull up, Total Hook Load= 63ton (Lost only 10T)

* Estimated drill pipe free 2187m

* Get rotation

  • Pressure decrease From (P=2800psi,Q=500lpm) To (P=1400psi,Q=800lpm).
  • pooh string w/circulation & rotation

* Pooh w/height torq= 9000lb*ft

* pump 03m3 (heavy mud & hi-vis) pill & ciculate (q= 800 lpm, p=1400psi)

* l/down one jt dp3 1/2'.( 2 637,0-2 187,0).

  • POOH STRING -FREELY-

* Difficult to unscrew many connections caused by over torque.

* Inspect string jt per jt.2 (187,0-1 693,0).

  • Continue Pooh String To Surface

* Difficult to unscrew many connections caused by over torque.

* Inspect string jt per jt (find 3 jtsdamaged)

* Total Fish Lost In the Hole (408m) = 14 STD's DP 3 1/2'' (400m) + BAKER

Setting Tools (8m)

* Theoretical Top Fish @ 2237 m.(1 693,0-0,0).

  • Rih 6 " Fishing BHA
  • Screw String through the Fish (Ok), Work String with Jarring Up.
  • Work String With Jarring Up, Pump Acid Plug, Circulate, Work String With Jarring Up Progress (Get Rotation+Down Free) Cumul Progress=12m.
  • Work String With Jarring Up To Get It Free , Pooh To Surface ( Fish Recovery 100%).