Monobore horizontal completions Designed for multiple proppant fracturing Designed for SIMOPS completion Coil tubing access for completion and well clean out Completed with heavy wall liner for collapse resistance Completion designed for primary depletion
Current Valhall Wells Tubing Hanger
5 1/2" TRSCSSV
Producer Well Completion Current Design
5 1/2" ASV
13 3/8" 72# csg
5 1/2" 20# Tubing
Control Line Color Code Hydraulic Line DHPG Line
x-over 5 1/2" x 4 1/2"
4 1/2" Gas Lift Mandrel 4 1/2" 12.6# Tubing
4 1/2" DHPG
9 5/8" 53.5# csg
7" x 4 1/2" Packer
3.750" Landing Nipple
4 1/2" Mule Shoe
6 5/8" 66# Liner
Challenges Ahead - Waterflood
• Possible flow anisotropy and direction − Risk of premature water breakthrough along faults/fractures • Water injectivity − Effect of pressure/temperature induced fracturing • Effect of Water weakening of the Chalk • Scaling • Water management • Chalk influxes
Developed Completion Schematic 21 1/4" Tubing Hanger 8 Feed Through
5 1/2" TRSCSSV
Producer Well Completion Perf Valve System
5 1/2" ASV 13 3/8" 72# csg
5 1/2" 20# Tubing Control Line Color Code Hydraulic Line DHPG Line Fibre Optic Line
x-over 5 1/2" x 4 1/2" 4 1/2" Gas Lift Mandrel 4 1/2" 12.6# Tubing
4 1/2" DHPG
9 5/8" 53.5# csg
9 5/8" Packer 2 x 1/4" Feed Through 4 1/2" Gas Lift Mandrel Landing Nipple No Seal Expansion Joint
No perforation Proppant Frac Resistant Adjustable flow area Contaminate cement
Sliding Sleeve:
Selective production/injection Maintain Well Integrity
Liner Mounted:
Cemented in place
Lower Completion: Timed Connections
Standard NSCC connection
Lower Completion: Turnaround Sub
Lower Completion: Casing Receptacle • Liner mounted part of Wet Connect • Provides the reconnect point for the 1/4” control lines • Contains the male half of the hydraulic connector. • Allows the control line to pass from inside the liner to outside.
Upper Completion: Wet Connect
Indicating Collet
Feed Thru’ Lock
Reconnect Lock Assembly
Cylinder Spring
• Run at the bottom of the completion • Locates, aligns and locks into the Casing Receptacle. • Connects the control lines from the completion to the liner
Alignment Profile
Upper Completion: Expansion Joint
Expansion Joint • Run between packer and wet connect • Rotational locked • 2 meter stroke • 2 ea ¼” control line by-pass
Upper Completion: Feed Through Packer
• Retrievable Packer, 7.5k Rated • Up to 7 feed troughs (1/4” lines)
Ullrigg Stack-Up Test Achievements • Convey “Perf Valve Liner” w/ timed connection and dual control line. Set hanger, simulated cement job and actuated perf valve pistons • Run upper completion w/dual control line. Oriented and connected the wet connect. Function tested the Expansion Joint and set the packer. • Deployed Optical Fiber to the toe of well and back to surface. Logged temperature as function of depth • Opened Perf Valve sliding sleeve, ruptured disc’s and simulated fracturing job • Released the Packer and retrieved upper completion, pulled lower completion