7” liner running procedure

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  • Hold Toolbox talk on rig floor, to advise all rig-personnel involved of the objectives, summary of the running procedure, and to discuss any particular care or safety concerns.
  • Company Man and Mud Logger to prepare Liner Weight + Metal Displacement Diagrams.
  • Pick up shoe-track sub assemblies and perform floating equipment test.
  • Install pip tags in liner joints, as per programme. The pip tags should be wrapped with Teflon tape prior to DOPE and M/U.
  • Pick up the Liner Hanger assembly very carefully to avoid right hand torque.and make up to the 7” liner. Leaving rotary slips set on liner joint pick up approximately 1m to check setting tool and all connections are properly made-up.
  • Fill PBR with clean brine or fresh water before running in hole.
  • Pull slips and lower assembly through rotary and set DP slips on the setting tool extension at the top of the running tool.
  • Pick-up Liner and circulate 120% of the liner content, check for leaks on the Liner Hanger assembly with the assembly above the rotary table. Do not exceed maximum circulating pressure 900psi (62 bar).
  • Record pick-up and slack-off weight of liner. Report in DDR.
  • R.I.H. with liner on drill pipe, release the lock of the block and fill up.
    • *Running speed should be 2 - 3 min/stand.
    • *NO Left Hand Rotation. This can release the running tool from the liner hanger.
    • *Circulation will only be carried out if difficulty is encountered whilst running in hole. *Absolute maximum of 5 bbls/min or 900psi, whichever is least.
    • *Do not “bump” against the back-up tong.
    • *Pipe dope to be applied sparingly using a paintbrush – to DP pin end connections only.
  • With the liner assembly shoe at the 9-7/8” casing shoe:
    • *Break circulation and check free circulation through the liner assembly. Circulate minimum volume of Liner + Drill Pipe contents. Do not exceed 900psi (62 bar) Maximum circulation is based on the Liner Hanger shear setting value with absolute maximum of 5 bbls/min or 900psi, whichever is least.
    • *Closely monitor for static and dynamic losses and record (Fluid Engineer).
    • *Record the weight-up and weight down.
    • *Start rotating the string at 20 and 30 RPM and note torque readings.
    • *Maximum allowable torque 15 Kft.lbs at surface. (If higher inform Drilling Engineer before proceeding).
  • The liner must be set about +/- 0.50m from bottom. Wash down last stand. Tag bottom with no more than 10 tonnes.
    • *Record the up and down weight.
    • *Pick up to neutral rotating weight, mark the pipe and pick up a further 2m.
    • *Rotate the string at 20 and 30 RPM and note torque readings.
    • *During rotation circulate bottoms up as a minimum (ensure that the circulating *pressure does not exceed 900psi (62 bar).We can exceed pressure to 1200 psi.
    • *Stop rotation.
    • *Spaceout and rig up cement head. Make sure swivel is used on the end of the cement hose to the cement head and hose weight is correctly supported.

LINER hanger setting procedure

  • Pressure test the surface lines to 5,000 psi (350 bar). This is based on value of 2,600psi (183 bar) ± 15% to shear out ball seat (3100 – 3800 psi)
  • Place indicator on Flag Sub to ‘Down’ position to minimise possibility of ball being held up on indicator lever.
  • Release ball and pump ball to seat in Landing Collar. Confirm release. Return indicator on Flag Sub to ‘Up’ position. If setting ball fails to seat, surge pump in attempt to remove debris from ball seat.
  • When the ball seats, pressure up to 1800 psi. Pre-set setting pressure of liner hanger is 1,400 psi ± 15% (± 100 bar). To confirm the liner hanger has set, bleed off pressure to 1,000 psi (± 70 bar) and slack off liner weight and a minimum of 50 Klbs (25 tonnes) of drillpipe.
    • *Pipe should be carefully marked and measured at all points in these operations.
  • If the hanger fails to set:
    • *Increase setting pressure in increments of 10 bar.
    • *In case of debris around slip area, bleed back pressure to 500psi & rotate string at 30-40rpm for 1 – 2 minutes.
    • *When the setting pressure gets to close to 80 % of the shear value of the running tool, bleed off to zero and repeat the setting sequence.
    • *Confirm liner hanger has set .
    • *If the hanger still has not set, pick up 0.5 m above previous setting depth and repeat.
    • *If not set at this point, place Hanger at setting point (Ensure running tool is in Tension), and increase pressure to 2600psi. Bleed back to 1000psi and check for set

LINER hanger release procedure

  • Shear out ball seat, with a minimum of 50 Klbs (25 tonnes) of drillpipe weight onto the liner. Expected shear 2,650psi ± 15% = 2,990 psi maximum.
    • *Pre-set shear value of the running tool is 2,030 psi ±15%
  • Pick up tool string to 1 m to check if setting tool has released. If yes, slack off weight 50,000 Ibs
  • If the running tool cannot be released hydraulically, the backup mechanical release mechanism can be used as follows:
    • *Ensure tool is in compression.
    • *Apply left hand (counter clockwise) torque to the tool. This torque acts to shear two brass screws which shear at 4,650 ft.lbs. ±15%.
    • *NOTE: Hole conditions may require movement of the Drill pipe to "work" the torque down to setting tool.
    • *Pick up string and observe loss of liner weight to confirm tool release.
    • *Note the running string weight when released.

Comments  

#2 mbata innocent 2014-07-09 11:06
it a fine procedure. confident man
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#1 victor adese 2014-02-05 13:24
find proceedure
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