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Drill Collar

China Puyang Zhongshi Group Co., Ltd. certification
China Puyang Zhongshi Group Co., Ltd. certification
Recommendation is good. Reception is professional. Demo training is also very great. Wish more online training after getting the machine.2017.8.26

—— David

Thanks for your kindly hospitality. Your company is very professional , we will have nice cooperation in the near future. 2015.6.28

—— Sergey

Good company with nice service and high quality and high reputation. One of our reliable supplier , goods are delivered in time and nice package 2016.3.25

—— Steve

Thanks for your good after-sale service. Excellent training and technology support helps me a lot. 2018.4.23

—— Mostafa

Professional, very helpful, great price. Will use again for other items 2019.2.21

—— Ahmed

Thanks for zhongshi group supporting and guidence. With your help and instruction, I win more market share. 2017.9.26

—— Manuel

Nice cooperation with zhongshi group.Imperssive for your service and support. 2018.3.18

—— Luis

We are satisfied with your product's quality. We highly appreciate to see the excellent performances in production capacity and thanks for the specialist technical support from you 2018.11.16

—— Mohammed

Good company with professional service and high quality. Delivered in time. Our most trusted partner for sucker rod and OCTG pipe. 2018.7.24

—— Nicolas

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Drill Collar
Latest company news about Drill Collar

Drill Collar


Drill collar is a component of a drill string, which places weight on the drill bit and pump drilling fluids. Drill collars are the integral thick-walled tubular pieces machined from steel solid bars, they are screwed together along with other downhole tools to make a bottom hole assembly (BHA).


Drill collars’ material is AISI 4145H modified steel, nonmagnetic nickel-copper alloy or other nonmagnetic premium alloys.Production standard is API Spec. 7-1.


Our drill collars are slick type and spiral type. Spiral drill collars have grooves machined on the outside surface that promote the even flow of drilling fluid around the drill collar diameter, equalizing pressure and reducing the occurrence of differential sticking.


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Pub Time : 2023-05-19 14:30:38 >> News list
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