VIDEO OF THE MONTH
Fluid Exiting Large Casing Hole
In situations where a major casing failure is suspected, we always recommend sending “eyes” downhole to assess the situation. In our experience, the worst thing to do is attempt to run a blind tool in first and hope it makes it back to surface in one piece. Our camera’s expansive and interactive view at the bottom of the tool allows for the most complete coverage of a possibly dangerous area of interest compared to competing camera technologies. In this application, our camera was deployed to inspect an assumed casing failure close to surface. We identified a large hole in the casing where the well fluid was exiting. The data did not show any obstructions hindering operations past that point. Equipped with this data, the operator could continue operations with added confidence provided by the visual verification of the problem area.
HIGH RESOLUTION MULTI-FINGER CALIPER (HR-MFC) VIDEOS
The caliper data is analyzed to identify, determine the severity, and to look for lasting effects of pipe buckling due to compression, formation shifts, and/or sub-surface subsidence. All forms of buckling cause drift restriction related to tool length, and the more severe events can cause localized I.D. restrictions due to induced pipe ovality. Using our high resolution caliper, our experienced analysts are able to clearly illustrate the complex geometry of pipe buckling and deformed intervals to support informed decisions that best support ongoing and future well work objectives.
The high sample rate and sensitivity of our high definition caliper, along with our PDS 3-D Data Viewer software allows for an incredibly detailed look at the internal profile of complicated well bore components like Side Pocket Gas Lift Mandrels. Customers are able to use our detailed caliper reports and software package to get an interactive internal view of these components as well as determine the orientation of guide slots and valve/latch positon relative to high side.
Mill Damage Inspection
A PDS multi-finger caliper log is a fast and comprehensive way to highlight areas of corrosive and mechanical damage such as unexpected mill or wear damage that occurred during previous well work operations. Our analysts will provide a detailed report that shows where and how severe the damage is as well as the condition of the well bore in the area of interest. This information is paramount to quickly move forward with remediation efforts and to get back to normal operations.
Using our state of the art proprietary software package, our analysts are able to accurately distinguish between I.D. restrictions caused by scale and deposit buildup, pipe deformation, or mechanical damage. An accurate map of the internal profile of the well bore provides a clear understanding of the location, extent, and mechanism of obstructions and tight spots prior to or during well work operations. Our high resolution calipers are routinely used to accurately monitor changes to internal diameters for effective evaluation of past remediation efforts and schedule potential future remediation needs.
Frac Sleeve Inspection
PDS has years of successfully analyzing Frac and Sliding Sleeves in vertical and horizontal wells to determine if the sleeves are open, closed and/or damaged, and to identify potential problems before and after fracking operations. Problems have included leaks due to mill damage to the internal profile of Frac Sleeves, parted Frac Sleeves, and parted liner/casing. Combining a temperature/spinner with our multi-finger caliper is commonly used to identify both mechanical and flow characteristics of sleeves in a single log pass.
DOWNHOLE CAMERA VIDEOS
Milled Through Casing With Visible Formation
Utilizing our innovative camera system and software (with a proper wellbore cleanup procedure in place), we identified what was causing the unknown restriction in the well. Based on the information gathered during operations, the operator decided to run a mill prior to running a camera. After unsuccessfully milling the unknown obstruction, our camera was run to inspect the point of interest. We found visible formation down to a piece of rolled over casing. We urge operators to utilize our cameras prior to milling operations. Visually inspecting a problem area can possibly reduce coil tubing costs and remediation costs if addition damage is done to the well.
Top of Damaged Casing From The Side In Open Hole
Utilizing our innovative camera system and software (even with less than favorable fluid conditions), we identified what was causing the unknown obstruction in the well. A section of casing had separated and completely shifted to the side exposing formation. With this information, the operator could more confidently move forward in this well intervention with the quality data captured by our downhole video service. In this application, our camera was involved in the solution. We ran our camera inside of an overshot assembly and helped guide the overshot real-time at surface to successfully fish the pipe (video data of the fishing operation will be released later).
Top of Tubing Fish
Fish identification is a very common application that cameras are generally associated with in the industry. The vast difference in the data gathered by the camera compared to the impression block is substantial as long as proper wellbore cleanup procedure is adhered to. In this specific application, fishing attempts were unsuccessful up to that point. The video data indicated that top of tubing had flared out. With this information, the fishing company on location was able to run the correct fishing tools to eventually latch the fish.
Unknown Capillary Tubing Left In Hole
In some downhole video applications, we were run to inspect a specific problem area downhole and found additional areas of interest on the way down. Capillary tubing was seen crossing itself along the casing walls before we reached our destination depth. This is a great example of why recording from surface is vital in most video application. The recording from surface can capture additional problems during that operation or give a visual point of reference for operations in the future. Utilizing our innovative camera system and software (with a proper wellbore cleanup procedure in place), we captured the entire casing that was logged (down view and 360o side view). The camera systems ability to look around, zoom in, and adjust contrast during the job and post job is invaluable to the operator moving forward with their well operations.
Gas Lift Inspection
Utilizing our innovative camera system and software (even with less than favorable fluid conditions), we were able to visually inspect this operator’s GLM to verify there was no unexpected debris accumulation or significant physical damage/irregularity to the GLM. As we clicked frame by frame in this video clip, you can see that particles were carried with the camera as we ran in hole. Once we stopped, the particles continued moving down hole. This is a great example of why the first run down hole is always the best. Any tool run in hole right before a camera run will stir up particles that were laying on the pipe walls. In most cases this will extend wellbore cleanup operations unnecessarily.
Damaged Top of Casing Patch
Utilizing our innovative camera system and software (with a proper wellbore cleanup procedure in place), we identified what was causing the unknown obstruction in the well. The top of the casing patch appeared to have rolled over indicating significant damage obstructing the ID of the casing. The operator was able to more confidently move forward in this well intervention with the quality data captured by our downhole video service.
Remnants of Packer
In this fishing application, the operator was not able to completely fish the packer as a whole. Pieces of it were retrieved, but they were not sure what was left and the condition of the remnants. Our camera was run to assess the area of interest. This camera’s ability to capture a 360-degree sideview of the packer, with the ability to zoom in for a closer look, was invaluable to the operator and the fishing company on location to successfully plan the continuation of the fishing operation.
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