How to choose oil drill collars ?

The selection of oil drilling drill collars is crucial because they are a key component of drilling equipment. Choosing the right drill collar can help improve drilling efficiency, reduce equipment damage and improve operational safety.

Drill collar structure

Drill collars usually consist of three parts: drill collar head, drill collar body and drill collar coupling. The drill collar head is the part that connects the drill pipe and the drill collar body, and is generally made of materials with high hardness and wear resistance such as cemented carbide or high-strength alloy steel. The drill collar body is the main part of the drill collar, usually made of thick-walled steel pipe to withstand high pressure and impact. The drill collar coupling is the part that connects other drill pipes or drill collars, and is generally made of high-strength alloy steel and is precisely processed and calibrated.

The following key factors need to be considered when choosing a suitable oil drill collar:

Drill collar material‌

The material of the drill collar should have good hardness and wear resistance to cope with high pressure and impact. Commonly used materials include cemented carbide, high-strength alloy steel, etc. For example, ordinary drill collars are generally made of 4145H steel, while non-magnetic drill collars are made of non-magnetic materials, usually stainless steel.

Drill collar wall thickness‌

The wall thickness of the drill collar body should be thick enough to ensure that it has sufficient strength and pressure resistance. The wall thickness is generally 38~53mm, which is equivalent to 4~6 times the wall thickness of the drill pipe.

Drill collar length‌

The length of the drill collar should be adapted to the required drilling depth. Longer drill collars can increase the drilling depth, but it will also increase the difficulty and cost of drilling.

‌Drill collar connection type‌

The connection method of the drill collar should be firm and reliable, and easy to disassemble and maintain. Common connection methods include slip connection, threaded connection, etc. For example, the plug-in threaded connection has the characteristics of easy disassembly and assembly, good sealing, and high tensile strength.

Drill collar type‌

Oil drill collars can be mainly divided into three types: ordinary drill collars, non-magnetic drill collars and spiral drill collars. Ordinary drill collars are generally made of 4145H steel, non-magnetic drill collars are made of non-magnetic materials, usually stainless steel, and spiral drill collars have integral spiral grooves‌.

Advantages of oil drilling drill collars include‌:

High strength and wear resistance‌: Made of high-quality materials, it can withstand high pressure and impact, effectively extending the service life‌.

‌Reliable connection‌: A firm and reliable connection method is adopted to ensure that accidents such as falling off or oil leakage will not occur during the drilling process‌.

‌Light weight‌: The optimized structural design reduces the weight of the drill collar and facilitates operation and transportation‌.

‌Corrosion resistance‌: The special surface treatment process is used to improve the corrosion resistance of the drill collar and adapt to various complex environments‌.

By comprehensively considering these factors, you can choose an oil drill collar that suits your specific needs, thereby improving drilling efficiency, reducing equipment damage and improving operational safety.

Drill Collar Supplier

Sino Mechanical Equipment is a reliable drill collar supplier in China.