Advantages to Running Multiple Howitzer Toe Sleeves Within A Single Wellbore

Challenge

• For many Operators, the limiting factor for casing integrity pressure tests is the toe initiation sleeve. 

• With the depth of high pressure, high temperature (HPHT) well designs, the hydrostatic pressure can limit the maximum applied pressure from surface against the toe initiation sleeves 

Solution

• The Howitzer pressure testable toe sleeve design supports higher applied pressure for testing requirements - all ports will independently open on bleed down 

• Multiple toe ports can be run as a redundancy option 

• Multiple toe ports in a wellbore reduces the risk of debris (e.g. cement stringers) plugging off the injection ports 

• Eliminates the need for perforating the first stage of a well 

• Can be used as the first stimulation stage if desired 

• Meets all regulatory pressure testing and casing integrity requirements 

Results

• Running multiple Howitzer toe sleeves is more economical than running other commercial options, and it can also be used as a limited entry frac stage 

• Savings to customers can exceed greater than $50k per well and 6 – 12 hours of coiled tubing run time

• More flow area than competing commercial toe ports 

• Optional ball seat configuration allows for multiple casing integrity tests

Interra Energy Successfully Deploys 16,000 AccuJet® Toe Initiation Sleeves

Challenge

• Within the design of conventional burst ports, once one port is activated, pressure can travel outside the port and equalize, preventing other ports from opening. 

Solution

• Interra Energy challenged itself to create a new toe sleeve that incorporated the proven accuracy of burst discs, while guaranteeing 100% opening of the flow area. This reduced the limitations that were commonly seen with burst ports while injecting into the toe. 

Results

• The AccuJet toe initiation sleeve design, released by Interra Energy in 2013, uses multiple burst discs that only require one to be activated. This allows a sleeve to shift exposing all of the injection windows to the formation. 

• As of June 2020, there have been over 16,000 successful deployments of the AccuJet’s technology in such formations as the Viking, Montney, Cardium, Duvernay, Permian, Bakken, Haynesville and the Eagle Ford.

Interra Energy’s Howitzer Pressure Testable Toe Sleeve Enables Casing Integrity Test After Extended Periods Downhole

Challenge

• Marcellus Shale frac crew availability results in installations being left downhole over 200 days before successful operation.

Solution

• The Howitzer pressure testable toe sleeve was installed in the Marcellus Shale for a major Operator.

Result

• After 202 days, the Operator successfully performed a maximum casing pressure test to 12,800 psi for 30 minutes before the Howitzer pressure testable toe sleeve activated and established communication to formation.