Moving tools and equipment up and down the well is an important and necessary task for making the perfect wellbore. To move tools safely and effectively in an oil or gas well operators use wireline. It is a cabling system which is helpful in bringing well tools up and down the wellbore. It is used for both well logging as well as for workover operations.
The wireline system can be a single cable wireline or it can be multi strands wireline. Also it is of two types which are electric or non-electric.
Wireline with multi strands of cable are known as braided wireline. It is made up of more than two electric cables which are insulated from each other. It provides electric pathways between tools attached to its end and the surface of well. It best known for its use in recovery of well, well evaluation and interventions.
On another hand slickline is a non-electric single strand wireline. It is used to drop down tools such as valves, gauges and plugs in the wellbore. Drop down and rise up operations can be performed by reeling in and out the single cable hydraulically.
Below are some wireline tools which provide various mechanical services
It is an open mouthed tool which is attached at the end of the electric wireline service. It is made up of steel or any other metal and has proper inner and outer diameter. It is used to check the dimensional capability of different tools to perform specific function accurately.
These are the drillable plugs which place down the well bore with the help of wireline. It is used for pumping pressure operations, for multi zone isolation of well for and multi zone stimulation of wellbore. It doesn’t cause any damage to casing of well and is easy to use.
It is a wireline tool used to apply or place cement slurry or other similar material inside the wellbore. If the well needs maintenance from any cracks then this is the best tool to use to fill that crack. It is available in many sizes; select the one according to the shape and dimension of the wellbore. When you attach a dump bailer with wireline ensure all its connections are tight to prevent any kind of leakage.
Sand line cutter:
If the tool gets stuck inside the wellbore then with the help of the cutter tool it can be released by cutting the length of wireline. Attach the cutter to the end of wireline and then drop down on the top of the cable with stuck tool. The tool rotates around its axis to perform the cutting action. This tool only cuts the cable without causing any damage to casing or any other equipment in downhole. It is automatically retrievable hence easy to use.
It is a device working as wireline tool and is use to hold the pressure from above and below. It allows fluid to pass through it when running in the well. Plug cannot be pulled up until pressure on its both sides i.e. upside and downside gets equalized.
Hence it also equalizes the pressure in well bore. Use the correct equalizing prong when removing wireline mechanical plugs and wait until the plug is completely equalized before you start to retrieve it.
Things to consider while using wireline tools
- Check and maintain all the wireline tools regularly.
- Check the connections of the tool with wireline and make sure that the connections are tight.
- Select appropriate size of tool like drill rigs, to attach with wireline as needed.
So, those were some of the wireline services and mechanical tools you can use as moving tools!