Case Study

Downhole InSigh NuWav Camera Uncovers Failed Packer Retrieval

CONDITION:

During the pre-deployment phase of well operations, an operator found they could not retrieve a packer set in 5-1/2-in. casing at 3789 ft. After several unsuccessful attempts to latch on to the packer with a retrieval tool and mills and wash pipe, they determined a visual view of the downhole environment was needed.

PROBLEM IDENTIFICATION:

A downhole camera system would provide the most effective method to confirm the condition of the top of the packer and check casing integrity. Renegade’s NuWAV™ Camera, part of its’ Downhole InSight™ suite of tools, was deployed while circulating with fresh water down the 2-7/8-in. tubing. NuWAV provides real time video images of downhole activity over mono- or multi-conductor wireline. NUWAV visually confirmed that both packer and 5-1/2-in. casing had been milled in half at 3789 ft.

SOLUTION and RESULTS:

Case Study

Downhole InSight NuWave Caerma identifies obstructions in the well, descreasing cirtical NPT for the customer

CHALLENGE:

During the pre-deployment phase of well operations, an operator found that although the well was circulating, there was an object stuck inside the casing. The operator identified an obstruction at 7,140 ft and needed to confirm that the integrity of the casing at that depth was not compromised. After several unsuccessful attempts to pass the obstruction with wedges and mills they concluded a visual camera was needed downhole.

SOLUTION:

It was determined a downhole camera system would be the most effective way of confirming the obstruction. Renegades NuWAV Camera, part of its’ Downhole InSight suite of tools, was deployed while circulating with 10.0 ppg brine. NuWAV provides real time video images of downhole activity over mono- or multi-conductor wireline. NUWAV visually confirmed the casing was both obstructed at 7,135 ft and collapsed with the casing stub below. Visible threads indicated that the pin end of the casing was broken and laying across the stub.

RESULTS:

With conclusive visual evidence from the NuWAV camera, the customer was able to confidently mill the threaded debris, re-enter the stub and continue wellsite operations. The action by Renegade stopped critical NPT and alleviated the risk of further well issues. Additionally, the camera was able to identify large debris, as well as identifying possible areas of concern that could present tight spots during drilling, running casing, or completing the well.

Case Study

Downhold InSight NuWAV Camera identifies collapsed casing, helps customer determine well repair plans. 

CHALLENGE:

An operator in the middle of a new project called after encountering challenges preventing them from forward progress. Although the well would circulate, the operator suspected that remedial efforts/operations had gotten outside of the casing and needed to verify whether fishing operations were inside or outside of the casing at around 3330 ft. 

SOLUTION AND RESULTS:

Renegade recommended running tubing to the area of interest and deploying the camera down the tubing simultaneous to circulating. The camera run determined that the casing had collapsed causing fishing efforts to side-track into open hole at 3328 ft and that the casing split open with the tubing inside at 3333 ft. With these visual diagnostics, the operator had confidence to move forward with reduced risk.   

ADDITIONAL BENEFITS:

The operator was able to inspect other problem areas of the wellbore while running in to inspect the location of the fish. The operator was able to save on additional NPT relating to additional fishing operations. In this case, the operator saved approximately $10,000 a day relating to NPT.