Precautions for Oil Drill Pipes and Extension of Service Life

Matters needing attention in construction technology management

1. Regarding the thick-wall drill pipe operation process, we strictly implement the technical briefing system and conduct pre-job training for on-site technicians, management personnel, and construction team operators to ensure that everyone is well aware of it.

2. For sulfur-resistant drill pipes, we must increase on-site inspections and standardize technical operation procedures during construction.

3. When using a weighted drill rod in the construction of bored piles in sand layers, the length of the casing should be appropriately increased or decreased according to different strata to ensure that the casing extends into the stable soil layer by no less than 50 cm.

4. Increase the frequency of mud testing for oil drill collars, adjust and replenish mud in time, and ensure that the mud density is always maintained between 1.4 and 1.6 during drilling.

5. The oil drill pipe is equipped with mud preparation pool, circulation pool and hole cleaning pool to improve the hole cleaning quality, increase the turnover efficiency of mud, and further save construction costs.

Key points of rotary drilling rig construction technology, adopting sand-bailing bottom-sealing drill bucket: When using a rotary drilling rig to drill in the sand layer, if an ordinary drill bucket is used, it is easy to "run empty", so the engineering and technical personnel actively carried out process and technical transformation, and finally decided to adopt a sand-sealed bottom drill bucket with simple operation process and relatively low technical requirements. At the same time, a vent hole is set on the drill bit to ensure the mud flow up and down the drill bit during the drilling process and prevent the vacuum phenomenon during the drilling process. After starting the rotary drilling rig, first use low-speed drilling, and ensure that the wire rope of the main winch bears more than 20% of the weight of the drill bucket and drill pipe. Be sure to strictly check whether there is any hole position deviation during the drilling process. Strictly control the mud density: During the drilling process, the clay-mud density is strictly controlled between 1.4-1.6.

How to effectively extend the service life of oil drill pipes

Drill pipe is a seamless steel pipe with a corrugated tail, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well. The purpose of the drill pipe is to transport drilling mud to the drill bit and to raise, lower or rotate the bottom hole device together with the drill bit. Drill pipes must be able to withstand huge internal and external pressure, twisting, bending and vibration. In the process of oil and gas extraction and refining, drill pipes can be used many times

1. Improve the comprehensive mechanical properties of geological drill pipes materials and the production process level of hollow steel, and reduce various internal and external defects of geological drill pipes as much as possible to ensure that geological drill pipes have high quality and service life. Of course, accurate operation and management during rock drilling is also a basic condition to ensure the life of geological drill pipes.

2. Continuously improve the structure of the rock drilling machine. For example, the piston of a pneumatic rock drill with a large end and a small end has evolved into a cylindrical piston of equal diameter in a hydraulic rock drill. While ensuring the continuous improvement of rock drilling speed, the waveform of rock drilling stress wave is changed and the crushing stress acting on the geological drill rod is reduced.

3. The drill pipe joint is the weakest link of the drill pipe. According to statistics, more than 80% of drill pipes breakage accidents occur at the drill pipe joint. In order to solve the wear problem of drill pipes joints and casing, the most commonly used method is to weld a wear-resistant alloy layer on the drill pipe joint to form a wear-resistant belt with a certain width and thickness. The drill pipe wear-resistant belt protects the drill pipe and casing from severe wear with its certain wear resistance and friction reduction.

Read more: Difference between Drill Pipes and Heavy Weight Drill Pipes

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