water well drill pipeDrilling is an important link in geological exploration and deposit development. For oil and natural gas, a well drilled is a channel for oil and gas production from oil and gas layers to the ground, as well as a channel for people to observe and influence oil and gas reservoirs.

Drilling is the use of mechanical equipment to drill the formation into a certain depth of the cylindrical hole engineering. Drilling is an important link in geological exploration and deposit development. For oil and natural gas, a well drilled is a channel for oil and gas production from oil and gas layers to the ground, as well as a channel for people to observe and influence oil and gas reservoirs. There are many ways to drill.

1.Drill. The drill bit is sent to the bottom of the well by wire rope, and the beam mechanism is driven by the power machine to make one end of the beam move up and down, and drive the wire rope and the bit to produce up and down impact. Crushing rock, also known as percussion drilling, is an ancient drilling method. The crown platform of the drill rig hasThree pulleys, each passing through a wire rope, are used for casing running, sand fishing, lifting and running.water well drill pipe.

Drilling with a drill, drilling and sand fishing must be carried out alternately. The drilling speed of the drill is slow, the efficiency is low, and it can not adapt to the drilling requirements of the increasing well depth and the complex formation, so it is gradually replaced by the rotary drill. But it has simple equipment and low costIt has the advantages of not polluting the oil layer, and can be used for some shallow low-pressure oil and gas wells, lost wells, etc.

2.Rotary drill. Using the cutting or grinding action generated by the rotation of the drill bit to break the rock is the most common drilling method. The drilling speed is faster than that of the drill, and it is easy to deal with complex situations such as well collapse and blowout. According to the power transmission mode, rotary drilling can be divided into rotary drilling and downhole power drilling: rotary drilling is equipped with rotary table at the wellhead of the drill floor. The central part of the rotary table has a square hole. The kelly at the upper end of the drill string passes through the square hole. The kelly is connected to the drill string and the drill bit. When the rotary table is driven by power, the drill string and the drill bit are rotated together to break rocks. Downhole power drilling is to use the downhole power drilling tool to drive the drill bit to break the rock, the drill string does not rotate when drilling, the wear is small, the service life is short, especially suitable for directional well. Downhole power drills include turbine drills, screw drills and electric drills.

3.Downhole power drilling. The downhole power drilling tool is used to drive the drill bit to break the rock. The characteristic is that the drill string does not rotate when drilling, the wear is small, the service life is long, and it is especially suitable for drilling directional wells. Downhole power drill includes turbine drill, screw drill, electric drill, etc. The first two are driven by high-pressure mud, and the latter is driven by electricity.

4.Rotary drill. Connect the drilling tool to the drill bit, and use the circulating liquid or gas to push the mandrel of the drilling tool, so that the drill bit can break the rock by impact and rotation at the same time. Suitable for medium hard formation.

5.Flexible rod drill. The flexible rod of steel wire rubber structure is used instead of the drill rod, and the underground power drilling tool is connected. The flexible rod can be pulled down with a special ground device with a large diameter drum, which can shorten the lifting.water well drill pipeTripping time, and continuous circulation of mud during tripping,The industrial test well depth of the flexible rod drilling method has reached.2330m。

6.Erosion drilling. Utilizing high pressure (upMore than 1000kgf/cm2) to drive the flushing fluid with abrasive, so that the flushing fluid can reach a high speed of about 200 m/s when passing through the wear-resistant nozzle of the drill bit, and the rock is broken by erosion.