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Enreach - Cold Tapping

EnReach Hot Tap Services provides a full service Cold Tap for the industry. Cold Tapping utilizes a clamp-on fitting (left top picture) to eliminate all welding and NDE. Cold Taps can be used to check for pressure or depressurize polyethylene/steel pipelines and well/casing bores in all sizes.

We provide cold tapping the use of a clamp-on style fitting and valve assembly with the use of a hot tap machine to safely cut a hole into pipelines and well casing. No matter if there is pressure or fluids in the line all will be kept under pressure and contained. Cold cutting is the use of a cutter designed to cut pipe along the circumference in order to make a cut with no sparks. This has no containment of pressure or fluids. Cold Tapping and cold cutting sometimes sound very similar but are not to be interchanged.  Due to the fact that if a live line w as cold cut or breached, it could result in catastrophic failure and easily result in injury and or death. Pipelines cold cut with no pressure but containing fluids could leak out and result in environmental damage. There for it is in my opinion that cold tapping is a safe alternative and the only way that a pipeline or well casing should ever be breached be for it is  cold cut. The following are a few examples of scenarios that we have actually run into cold tapping for clients over the last few years providing this service.

Scenario 1

This is the worst case scenario and has happened to us on more than one occasion, we cold tapped a pipeline that was presumed down,  shut in, and bleed off.  After we cold tapped it there was pressure on the line. What happened was that an operator was sent to shut in the correspo nding wells that were tied into that pipeline. There was a misunderstanding between LSD numbers due to very similar numbers corresponding to different wells, this lead to the wrong well being shut in.  The pipeline after cold tapping still had the full pressure and flow of one well. The problem was quickly realized and the correction was made, and the work continued on, no release of gas, and no one being hurt. In other situations that we have run into with other clients was such that not all the wells were shut in and one was forgotten about.

Scenario 2

A client that we work for has a policy that all pipelines are to be cold tapped prior to any cold cutting, and it’s a good thing too. A new branch pipeline was to be tied into an existing main line. The existing pipeline was line located, hydrovaced, and exposed. The pipe line was then shut in,  de-pressured and even a pig was sent trough from one end to the other to confirm communication. We cold tapped it and it had pressure on it. What happened was the line that belong to the client was 4m over running parallel to the one we cold tapped. The one we tapped was not registered and no one knew it existed. The cold tapping clamps that are used by EnReach are used as a temporary fitting, but can be left in place as long as needed to resolve any issues.

Scenario 3

Cold tapping for a regular client on abandoned pipelines that need to be re-exposed and abandoned properly with today’s standards.  We cold tapped a line that was previously abandoned and had welded caps on both ends. After we cold tapped there was fluid that was left in the pipeline, 3 ½ Vac truck loads later all the fluid was removed safely with no spills due to the fact the cold tap fitting and valve assembly can simply be shut-in at any time. A common misconception is that “we know the line has no pressure on it and we have a drip tray under the cut and a vac truck on site, any fluid we have come at us when we make the cold cut can be removed with the vac truck”. Only problem is how much fluid could there be, and how fast is it going to come out? If the truck is full there is no way to stop the fluid from flowing out. Not only does the cold tap act as the only safe method to breach a pipeline but also is environmentally safe  way to attach a vac truck to remove any fluid in the line.

Scenario 4

In an attempt to re-enter a cut and capped well in order to lower the height it was buried at, we cold tapped the surface casing and found the re to be pressure. Turns out that the well was not abandoned properly years ago and gas was able to migrate up the surface casing. The cold tapping clamp and valve assembly acted as an access point to safely flare off the gas, kill the well and to later aid in the extension of the casing. The well was then properly abandoned and then cut and capped to the right height.



All fitting are rated for sour service and 1000 psi working pressure with higher rated fittings available by request.

 

 

Download PDF You can download more info in our Cold Tapping PDF brocure

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