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China, Chinese Special Drill Collar Spiral Grooving1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Other Petroleum Equipments MachineryDrill StringRotary Table
Zhenjiang Boral Machinery and Equipment Co., Ltd.
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Product Description Spiral GroovingIn order to reduce differential pressure sticking, the surface of drill collars can be spiral-groovedNote 1-Loss of weight is approximatively 4%, compared to slick drill collars.Note 2-Length of spiraled section allows reconditionning of connectionsStress Relief Groove & Bore Back BoxStress relief grooves improve bending strength of pin and box connections and, therefore, durability. Stress relief grooves for box and pin are defined by API.Bore back box is a gradual reduction of internal diameter by gradually increasing material cross sectional area at critical section. This will ultimately drastically reduce stress concentration during static/ dynamic loading and prevents box connections from failure.HardbandingWe provide several hardbanding materials for customer's choice: Arnco-100XT, Arnco-300XT, TCS-8000;Slip and Elevator RecessSlip and elevator recesses improve downhole handling efficiency and safety. Slip and elevator recesses are machined in accordance with API 7-1.Recommended Hardbanding Location-Drill collars with slip and elevator recesses (ZIP):4" long wear pad above elevator recess1" long wear pad above slip recess.10" long wear pad under slip recess-Drill collars with slip recess:10" long wear pad under slip recess,4" long wear pad above slip recess.-Drill collars without slip and elevator recesses:10" long wear pad at 30" from pin shoulder. Specifications:
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