professional petroleum equipment Drill pipe for Dill collar 79.4-171.5mm

Drill pipe for Dill collar 79.4-171.5mm

Description:

Drill Collars is one of the most important product of China Komal which mainly used
to provide bit weight to drill so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity.Our drill collars are manufactured strictly from API Spec7-1 standard. 

Spiral drill collars

Spiral drill collar is China Komal main product such drill collar to prevent drilling process in the differential pressure block, the spiral groove will allow the mud around the drill collar of freedom flow to differential pressure sticking. With the drilling shaft to reduce the cont act area, which can effectively reduce the block have the possibility of differential
pressure.

Spiral drill collar had been widely used because of the characteristics of its own decision, this special spiral drill
collar to reduce the tube wall and the contact area. The drill string so as to avoid sticking,phenomenon. Weight spiral drill collar drill collar round than the weight of 4-6% less.

Non—magnetic drill collars

Non-magnetic drill collar is the used of such a low-carbon high-chromium alloy steel of magnetic, which is to undergo a rigorous
analysis of the chemical composition by forging and refining, and has a good low-permeability, high strength and excellent mechanical
properties Resistance to intergranular corrosion cracking performance, excellent wear resistance. When the magnetic field strength for
1 x 105/4nnNm. The non-magnetic drill collar along the inner hole of l00mm away from any magnetic gradients0.010. Non-magnetic
drill collar along the inner hole of 100mm away from any magnetic gradients0.05nT. non-magnetic drill collar along the entire length of
the mechanical properties shown as below(check this by testing samples from the surface of an inch the following):

Applications:

It’s the parts of drill rig,used for drilling,necessary tools for oildrilling.

Specifications :