Petroleum Well Control Equipment Co., Ltd.(PWCE)

PWCE Express Oil and Gas Co., LTD.

Seadream Offshore Technology Co., LTD.

China Short Drill Collar Manufacturing

Short Description:

Diameter: The outside diameter of a Short Drill Collar is 3 1/2, 4 1/2, and 5 inches. The inside diameter can also vary but is usually much smaller than the outside diameter.

Length: As the name suggests, Short Drill Collars are shorter than regular drill collars. They can range in length from 5 to 10 feet, depending on the application.

Material: Short Drill Collars are made of high-strength alloy steel, designed to withstand the intense pressures and stresses of drilling operations.

Connections: Short Drill Collars usually have API connections, which allow them to be screwed into the drill string.

Weight: The weight of a Short Drill Collar can vary greatly depending on its size and material, but it is generally heavy enough to provide significant weight on the drill bit.

Slip and elevator recesses: These are grooves cut into the collar to allow for secure gripping by the handling tools.

Product Detail

Product Tags


The short drill collar is made of high-strength alloy steel after heat treatment. The mechanical performance and the connection thread meets API standard requirement. It is mainly used for special tools connected to or constitutes a certain number of drilling tools.

Our Short Drill Collars provide the much-needed rigidity to the drill string assembly and help avoid the unintentional sidetracking of the borehole. Its compact size enables it to deliver higher torque and enhances the rate of penetration. It comes with a slick or spiraled exterior, which is beneficial in reducing differential sticking. As a result, the Short Drill Collar ensures that drilling operations remain smooth and uninterrupted, thereby increasing the overall efficiency of the drilling process.

short drill collar 2
short drill collar4

Technical Specification:

conn I.D(mm) m
105(4-1/8) NC31 50 1.5 / 2 / 2.5 / 3 / 3.5
121  (4-3/4) NC35 50
127(5) NC38 57
159(6-1/4) NC46 71.4
165(6-1/2) NC46 71.4
178(7) NC50 71.4
203(8) 6 5/8 FEG 71.4
229(9) NC61 71.4
Specification O.D


Water Eye






ZTD105 105 50.8 NC31 Customization
ZTD127 127 57.2 NC38
ZTD168 168 71.4 NC50
ZTD203 203 71.4 6 5/8 REG

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