Example 4.1/2in Liner Cementing Procedure

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1. RIH 4 ½” liner to shoe depth (Top of liner at RMLS window) as below

- 4 ½” smith needle nose float shoe made up with Baker Lok on one joint of 4 ½” casing
- 3 joints of 4 ½” casing as the shoe track
- Latch down landing collar
- Solid body aluminium centralisers with stop rings, one on the shoe joint and one on every other joint from shoe joint to RMLS window.
- 15 ft transition joint
- Running tool
- 3 ½” / 5” drill pipe to surface

Note:

  • Extreme caution to be taken when running liner hanger through doglegs grater than 10 deg.
  • Liner contractor and directional drilling contractor to be on rig floor at all times to supervise and advise.
  • As the first centraliser passes through the RMLS window the drag is to be noted and to be used as guide for all other centralisers passing through RMLS window.

2. INSTALL the closing plug releasing dart (1.605in OD aluminium nose) in the cementing manifold.

3. PREPARE 30 bbls dual spacer - E in slug pit as follows:

4. BATCH MIX cement slurry to 15.0 ppg as follows: (Includes 15 % excess in open hole and 300ft liner overlap) 

5. PUMP 5 bbls freshwater ahead of cement followed by 30 bbls 10.5 ppg Dual Spacer.

6.CEMENT 4.1/2in liner in place with Class “G” cement as per above recipe.

7. DROP shut-off plug releasing dart followed by 2 bbls cement to avoid any rotation of plug when drilling out.

Dual Spacer Design

Additives

Design

Amount

Spacer-500 Blend

58.0 lb / bbl

2320 lb

Bentonite

2.0 lb / bbl

80 lb

Barite

80.0 lb / bbl

3200 lb

PEN-5

0.50 gal / bbl

20 gal

NF-3

0.015 gal / bbl

0.6 gal

Mixwater (Drill)

35.97 ga; / bbl

1439 gal

Slurry Density  10.5 ppg

 

 

Note: Final spacer design to be faxed to rig by cementing contractor 3 days prior to cement job

Cement Slurry Design

Additives

Design

Amount

Cement

Class “G” UCN

sx

Microblock

1.0 gal / sk

gals.

Gas stop

0.5 % BWOC

lb

NF - 3

0.015 gal / bbl

bbl

HR - 4

0.3 % BWOC

lb

Mixwater (Drill)

5.50 gal / sk

gals

Cement Slurry Properties (Example)

Note:   Cement volume to be calculated on rig based on the actual setting depth of    liner and slurry properties to be verified prior to job.

Slurry Density

15.0 ppg

Slurry Yield

1.35 cu ft / sk

Thickening Time

3 hrs. 30 mins.

Fluid Loss

58 cc

BHCT

157o F

BHST

222o F

9hr Compressive Strength

900 psi **

12hr Compressive Strength

1500 psi **

24 hr Compressive Strength

2100 psi **

Interval to be cemented

± 9 339 ft - ± 11 359 ft

 

** Compressive strengths to be re-verified in lab

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