Nonstandard Drill Pipes with welded connectors are designed for drilling of cement plugs during oil and gas well workover and drilling of small wells.
Technological pipes used in sets of equipment for the washing of wells, and for washing proppant after fracturing and purging of wells with nitrogen for cleaning the tubing and bottoms from the sand stoppers, fishing operations, perforating of tubing, liquidation of oil and gas wells, etc.