The HydraWash™ system was developed to enable plugging a well without performing any milling operation.
The HydraWash™ system consists of a HydraWash™ Jetting Tool and a HydraWash™ Cement Stinger which are run as one tool into the well. The HydraWash™ Jetting Tool is used to wash and clean out debris in the annulus behind a perforated casing. The HydraWash™ tool is converted into a HydraWash™ Cement Stinger to enable placing plugging material in the well’s entire cross section and hence, establishing a proper barrier in the well for P&A or sidetrack purposes.
The HydraWash™ Jetting Tool insures optimum conditions in the casing annulus prior to placing the plugging material in the cross section. To prevent surging the well while running in hole, the HydraWash™ Jetting Tool has incorporated several large bypass channels that will diverted the mud from below the tool to above the tools swap cups. These channels will allow the usage of annulus or drillpipe activated TCP guns below the tool.
After completing the washing sequence and placing the spacer in the annulus, the HydraWash™ Jetting Tool is disconnected and left in the well below the bottom perforation forming a base for the upcoming plugging operation. After disconnecting, the top part of the HydraWash™ tool has been converted into a large ID HydraWash Cement Stinger™.
The HydraWash™ tool is connected to TCP guns and the workstring. When running in hole, full circulation through the HydraWash™ tool is possible and hence, tripping speed is determent by the TCP gun supplier.
After TCP perforation, the washing feature is activated by dropping a ball that closes off the bypass channels. The perforated interval is washed as per detailed HydraWell Intervention washing procedure until sufficient pumping rates are achieved.
A larger ball is dropped to activate the hydraulic release system that separates the HydraWash™ Jetting Tool from the Cement Stinger.