Screen Assembly

SS end plate 416.000 80mm 55 Sump 410.00 - 408.00 80mm Screen 408.00 - 396.00 80mm Riser Pipe 396.00 - 392.00 80 x 125 Packer 392.00 - 391.50

Anticipated Casing String Run

Casing float shoe 396.00 - 395.55 Drill-out Pipe 395.55 - 390.05 Centron x/over 45 lengths FRP

390.05 - 389.60 389.60 - +0.68

Stick-Up is 0.68metres

2 METRES SUMP 80mm NB SS WITH END PLATE

TOTAL SCREEN ASY EXTENDS FROM TOP OF PACKER AT 389m TO BASE OF SUMP

(BOTTOM OF HOLE) AT - 410m

FRP Casing Grades

DHC200 30 joints 0-266 Approx DHC250 9 joints 266 - 389 Approx

273.10mm OD STEEL SURFACE CASING PRESSURE GROUTED IN AT - 66 METERS

ENTRALISERS 1 PER CASING LENGTH

125mm NB FRP MAIN CASING WITH RELEVANT GRADE TO SUIT DEPTH - PRESSURE GROUTED IN

,---5.50 METRE125mm NB SS DRILL-OUT PIPE PLUS X/OVER

6.50 - METRE 80mm RISER PIPE WITH VULCANISED BORE K-PACKER

12 METRES 80mm NB SS SCREEN FROM 396m TO 408m

OTTOM OF 125mm NB CASING FLOAT SHOE AT -396 METRES

CASING FLOAT SHOE

REPLACEMENT INFLATABLE PACKERS & ELEMENTS PTY LTD

29 WHEELER STREET, BELMONT, WESTERN AUSTRALIA 6104 PH: .61 (08) 9475 0700, Fax: .61 (08) 9475 0770

packersripe-packers.com www.ripe-packers.com

PROVISIONAL WATER BORE COMPLETION 270613NBKO

BEFORE HEADWORKS INSTALLATION

125mm NB FRP CASING WITH 80mm NB SCREENS TELESCOPED

Replacement Inflatable Packers and Elements Pty Ltd 29 Wheeler St, Belmont, Perth Western Australia 6104

packers@ripe-packers.com www.ripe-packers.com

REPLACEMENT INFLATABLE PACKERS & ELEMENTS PTY LTD

29 WHEELER STREET, BELMONT, WESTERN AUSTRALIA 6104 PH: +61 (08) 9475 0700, Fax: +61 (08) 9475 0770

packersripe-packers.com www.ripe-packers.com

Drilling and Construction of New Bores

Suggested General Work Procedure

Drilling Technique: Surface Casing: Main Casing:

Screen Assembly:

Bore Construction:

Mud Rotary 273.0m OD steel 125mm NB FRP - 167mm maximum OD at tools joints Stainless Steel drill-out pipe, casing float shoe and cross-over Stainless Steel end plate 2metres 80mm NB stainless steel sump extension 12 metres of 80mm NB, grade 316 stainless steel bore screen 6.50 metres 80mm NB stainless steel riser pipe extension vulcanised bore packer

Drill for and install 273.10mm OD steel surface casing at -66metres with a casing float shoe and centralisers and pressure grout it into place. take 2 samples of the grout slurry.

Allow 12 hours for grout cure. Top up the annulus with grout to ground level as required. Drill out the shoe and drill a hole of suitable diameter to the target depth which is

expected to be approximately 410metres. Stand-by while the contracted operator conducts a geophysical log of the bore. Install 125mm NB FRP casing with casing float shoe, bottom drill-out pipe, crossover and centralisers and

pressure grout it into place at the depth directed expected to be at - 396metres. Take 2 samples of the grout slurry. (125mm NB FRP casing has a maximum diameter over the tool joints of 167mm);

\\( **The decision to grout without the bottom of the hole or to gravel pack the bottom of the hole prior to grouting is entirely at the contractor's discretion.**

Allow 24 hours for grout cure. Run in and drill out the cement at the shoe. Continue to clean out the borehole to the depth required for the screen assembly, anticipated to be

41 metres. Run the 80mm NB stainless steel screen assembly and vulcanised bore packer and set it at the

depth directed. Develop the bore in line with the requirements o the contract. Fit the head works assembly standpipe. Cast a concrete block around the standpipe at surface. the block shall be a minimum of

750mm square x 350mm deep. The top of the block shall be at ground level. The top of the standpipe shall be not less than 600mm and not more than 750mm above the top

of the block.

** Surface casing depth should be decided on-site as drilling is undertaken.**

Replacement Inflatable Packers and Elements Pty Ltd 29 Wheeler St, Belmont, Perth Western Australia 6104

packers@ripe-packers.com www.ripe-packers.com