● The Square Kelly Manufactured from AISI 4145H-modified, fully heat-treated alloy steel with a Brinell hardness range of 285-341BHn and a minimum average Charpy impact value of 40 ft-lbs; ● Ends and drive sections of the Square Kelly, IDs and connections machined and inspected to API specifications; ● The Square Kelly Ultrasonic inspection is performed on all sections; ● The Square Kelly Shipped in a protective steel-cased scabbard;
1. High-Quality Materials & Standards Compliance – Our drill pipes are manufactured in strict accordance with SY/T5561 and API Spec 5DP standards, ensuring superior performance in demanding drilling operations. 2. Enhanced Durability – Featuring wear-resistant hardfacing on the box-end connection, our drill pipes minimize casing and drill pipe wear, extending service life. 3. Precision Engineering – Threads at both ends undergo phosphate coating and are fitted with thread protectors, while optional cold rolling treatment at thread roots enhances fatigue resistance. 4. Rigorous Testing – Each drill pipe undergoes makeup/breakout testing to guarantee reliable connections under high torque and pressure.
The Spiral Drill Collar is used in drilling to reduce friction with the wellbore, prevent sticking, and maintain stable downhole operations in oil/gas, geothermal, and mining drilling. ● Spiral Drill Collar, A hardness range of 285 to 341 HBW and a Charpy impact value of 40 Ibs/ft are guaranteed for evenly distributed 16 points in any cross sections at room temperature; ● Spiral Drill Collar ,Connections are phosphate coated after machining to protect the threads from corrosive elements and to prevent galling upon initial make-up; ● Spiral Drill Collar ,Thread roots are cold rolled on APl and H-90 connections; ● Spiral Drill Collar, Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections
Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drill string in tension. XINRUIDE Drill Collar is manufactured from AISI 4145H modified quenched and tempered steel and is heat treated along its entire length for uniform toughness and durability.Strict metallurgical tests are performed per specifications to ensure that the heat treatment produces consistent and maximum hardness through the depth of the bar. ● A hardness range of 285 to 341 HBW and a Charpy impact value of 40 Ibs/ft are guaranteed for evenly distributed 16 points in any cross sections at room temperature; ● Connections are phosphate coated after machining to protect the threads from corrosive elements and to prevent galling upon initial make-up; ● Thread roots are cold rolled on APl and H-90 connections; ● Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections
● Heavy Weight Drill Pipe, A center upset or wear pad to increase tube life, reduce hole drag and differential sticking problems; ● Heavy Weight Drill Pipe Connections are completed (phosphate coated) to protect them from the elements after machining and to help prevent galling upon initial make-up; ● Heavy Weight Drill Pipe Thread roots are cold rolled on API and H-90 connections. And pressed steel thread protectors are supplied for standard connections; ● Heavy Weight Drill Pipe Hardbanding and internal coating can be provided on customer’s request.
Kelly is main driver of the whole drill string.It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole.XINRUIDE Kelly is a long square or hexagonal,precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string.
Heavy Weight Drill Pipe (HWDP) is an intermediate weight drill stem component which is used in conjunction with the drill pipes and drill collars. XINRUIDE HWDP is avalable in standard,spiral and non-magnetic designs.In some applications,heavy-weight drill pipes also can be used instead of the drill collars.
