Manufacturer / Exporter / Supplier Of OCTG API LTC Casing Coupling, OCTG API 5CT Tubing Pipe EUE NUE L80 Oilfield, OCTG Oilfield Tubular Products API Drill Collar, OCTG API 5CT Coupling Blank Oilfield Tubular Products, Oilfield Tubular Products Heavy Weight Drill Pipe, OCTG API 5CT Tubin... Read More
Drill Collar Specification Drill collars are used at the bottom of the drill string, just above the drill bit. They are used mainly for weight on the drill bit but also work as a shock absorber to dampen the vibrations and impact forces caused by drilling. There are two main types of drill collars, slick or spiral grooved, however both styles accomplish the same task. Spiral groove drill collars were introduced in more recent years and are thought to help prevent the drill string from getting stuck in the hole by allowing drilling debris and lubricant to pass more freely around the drill collar. The size for Tubing couplings are ranged from3-1/8”to 11”
the couplings produced by our company are good at stable quality which the technical parameters are completely complied with the requirements of api5ct and api5b latest standards. Meanwhile, the company has equipped with more than 30 sets cnc threading machines, is able to produce variety of steel grade couplings include stc, ltc, btc and nu, eu threading couplings. we also supply permium thread products by customer's request 1.grade: j55, k55, n80-1, n80-q, l80, c90, p110 2.we also supply permium thread products by customer's request 3.size: tubing coupling from 1.9" to 4-1/2", casing coupling from 4-1/2"to 13-3/8" 4.type: nu, eu (tubing coupling), stc, lc, btc (casing coupling). 5.surface treatment: whole phosphating, or inside phosphating and outside coating 6.packing: by carton, wooden case, wooden pallet, or by requirements of customers otherwise, our company manufactures and sells casing and tubing, threader protector etc. We always do business based on the principle of equality and mutual benefit, we provide the high quality and competitive price products
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