Our field proven Perf & Wash tool (PWT) is designed to perforate selected casing or liner sections; wash and clean the perforated zone completely; then enable permanent rock-to-rock cement plugging–all during a single trip. By
eliminating the need for milling and debris handling, and preparing the seal zone to receive cement, PWT delivers a step change in plug and abandonment (P&A) efficiency and effectiveness.
Well assets are maturing and the need for reliable, cost-effective P&A techniques is increasing. Traditional P&A methods are often time consuming and costly. But decommissioning a well has to be done with permanent integrity in mind, and without compromise. The PWT system provides an economical and effective alternative to traditional techniques. In designing the PWT, our engineers focused on 3 key areas–efficiency, flexibility and reliability.
Efficiency
Traditionally, the creation of a rock-to-rock cement plug begins with milling a section of casing or liner. But removing hundreds of pounds of steel takes time and is often callenging; the resulting swarf requires special handling equipment and treatment. Also, squeezing cement into perforations
without washing and purging the perforated zone is leaving a lot to chance. The PWT eliminates the need to mill casing or liner, and it provides a clean and open annular space in which to place cement. Operating the PWT is straightforward. It‘s one-trip operation consist of perforating
the section, at which point the guns drop automatically; thoroughly washing the perforated section; dropping the PWT; then placing the cement plug. If required, drilling and logging the annular cement, and replacing the cement plug within the casing can also be performed. During cleaning, high-circulation rates enable improved efficiency and more effective removal of debris from the perforated zone and out of the well.
Flexibility
The PWT is modular, allowing the same chassis to be used for most well sizes. In addition, adjustment of the distance between the swab cups allows enhanced control of flow velocity through the perforations.
Reliability
The PWT is derived from Archer‘s Cflex stage cementing technology, which boasts close to 100 successful runs in an offshore environment. The PWT‘s bypass system allows efficient deployment operations in conjunction with the creation of a clean annular volume for placing a competent cement plug.
Features
— Field proven
— High circulation rates
— Adjustable distance between swab cups
— Dual swab cup design
— Flow by-pass system
— Drop-off system
Benefits
— Effective rock-to-rock cement barrier
— Significant time and cost savings
— Efficient one-trip system
— Eliminates need for section milling and
swarf handling
— No surge or swab effect
For more specifications:
http://archerwell.com/resources/perforate-wash-tool-product-sheet/