Drill Subs

Drill subs are an important integral part of everyday drilling. Not having the right thread adapter can make your life miserable. We have a large inventory of common and not so common sizes. Custom sizes are always available. Rotary subs have two primary applications. They can be used to cross over from one connection size to another, or as the disposable component used to extend the connection life of a more expensive drill stem member. Installing a float sub (with check valve) is always a good idea when drilling in wet situations.

Drill subs are an important integral part of everyday drilling. Not having the right thread adapter can make your life miserable. We have a large inventory of common and not so common sizes. Custom sizes are always available. Rotary subs have two primary applications. They can be used to cross over from one connection size to another, or as the disposable component used to extend the connection life of a more expensive drill stem member. Installing a float sub (with check valve) is always a good idea when drilling in wet situations.

Drill subs are an important integral part of everyday drilling. Not having the right thread adapter can make your life miserable. We have a large inventory of common and not so common sizes. Custom sizes are always available. Rotary subs have two primary applications. They can be used to cross over from one connection size to another, or as the disposable component used to extend the connection life of a more expensive drill stem member. Installing a float sub (with check valve) is always a good idea when drilling in wet situations.

Drill subs are an important integral part of everyday drilling. Not having the right thread adapter can make your life miserable. We have a large inventory of common and not so common sizes. Custom sizes are always available. Rotary subs have two primary applications. They can be used to cross over from one connection size to another, or as the disposable component used to extend the connection life of a more expensive drill stem member. Installing a float sub (with check valve) is always a good idea when drilling in wet situations.

1.It is divided into drill string crossover and tubing Crossover. 2.Drill string Cross-over is divided into type A, type B and type C. Crossover subs are made from AISI41455H chrome molybdenum alloy steel, and the content of micro-element can be controlled availably. The surface of sub threads are phosphated or copperized. According to shapes and applications, crossover subs are divided into three types: Type a stands for the same diameter: one crossover sub has one size. Type b stands for reduce type: one crossover sub has two sizes. Type c for left hand thread type: the connection thread is left hand type. Use: it plays a role of connectivity and conversion in different specifications drilling tools. Characters: crossover subs are complied with SY5200-93 or API Spec7. All products must be ultrasonic nondestructive tested and the surface copper coated. Crossover subs of various types and lengths are available.

1.It is divided into drill string crossover and tubing Crossover. 2.Drill string Cross-over is divided into type A, type B and type C. Crossover subs are made from AISI41455H chrome molybdenum alloy steel, and the content of micro-element can be controlled availably. The surface of sub threads are phosphated or copperized. According to shapes and applications, crossover subs are divided into three types: Type a stands for the same diameter: one crossover sub has one size. Type b stands for reduce type: one crossover sub has two sizes. Type c for left hand thread type: the connection thread is left hand type. Use: it plays a role of connectivity and conversion in different specifications drilling tools. Characters: crossover subs are complied with SY5200-93 or API Spec7. All products must be ultrasonic nondestructive tested and the surface copper coated. Crossover subs of various types and lengths are available.

Lifting Subs are of one-piece construction and manufactured from alloy steel fully heat-treated. The structure includes sloping shoulder and straight shoulder, which can be selected by customs. Lifting Subs are normally manufactured 1200mm long overall. But this type sub can be made to any length desired.

Straight subs: Used to connect drill stem members that have a similar OD. Reduced-section sub: Used to connect drill stem members that have different diameters that warrant the cross-sectional change necessary to accommodate different connections. Saver sub: Used to extend the life of the rotary kelly by taking the connection wear each time it is made up to a drill stem component. Bit sub: Size availability ranges from 3 1/8 in to 11inch OD and 36in to 48in length. Lift sub: A lift sub enables the safe, efficient handling of straight OD tubular, such as drill collars, shock tools, jars, directional equipment, and other tools, by using the drill pipe elevators. Top drive sub: Top drive subs serve as the sacrificial element between the drill string and the top drive, reducing repair and maintenance costs.

Supplier: Drill collars, integral heavy weight drill pipes, stabilizers, subs