Hard Thread Deep Hole Drilling 5 5/8 Inch Drill Pipe
Drill Pipe Introduction
drill rod ,same as extension rods, our all drifting & tunneling rods are produced by CNC machining and advanced heat treatment on the base of the same steels as . We are able to supply full range of drifting & tunneling rods shown as below:
Thread sizes: R22, R25, R28, R32, R38,T38
Rods diameter: round 32mm, round 39mm, Hex.25mm, Hex.28mm, Hex. 32mm, Hex.35mm;
Effective lengths: 2100mm ~ 6400mm;
STANDARD HEAVY WEIGHT DRILL PIPE
Roschen standard heavy weight drill pipe assembly is made up of pin and box tool joints and a heavy weight tube with center upset or wear pad.
This configuration helps to prevent stress concentration which could otherwise occur and allows directional drilling with controlled torque and reduce differential pressure sticking.
The service life of the Heavy Weight Drill Pipe is extended to maximize your investment by;
• Providing extra-long tool joint that increases tong space which allows more connection recuts.
• Reducing wear rate on tube OD through additional protection by the center upset or wear pad which keep the tube away from the hole.
HEAVY WEIGHT SPIRAL DRILL PIPE
Roschen heavy weight spiral drill pipe handles maximum stresses induced at tough drilling environments in vertical and directional wells.
The heavy weight spiral drill pipe shares many of the same features from the standard heavy weight drill pipe except that the pipe body has an enlarged center section with three spiral grooves.
The spiral design adds following advantages;
• Better reduction in differential sticking
• Increased weight and stiffness
• Minimizes wear
• Improves cutting circulation for better hole cleaning
ENHANCED FATIGUE RESISTANCE
Cold rolling on the thread roots of every connection is necessary to increase the connection’s ability to resist failure from cyclic stresses on the thread roots when stiffer heavy weight drill pipe undergoes repeated severe tensile and compressive stresses at drilling operation.
Cold rolling hardens the thread roots inducing compressive stress that minimise crack forming to increase fatigue resistance.
API Bore back on the box connection or stress relief groove on the pin connection can further enhanced fatigue resistance on conventional API connections.
HIGH PERFORMANCE ROTARY SHOULDER CONNECTIONS
Roschen offers its DS and MT series double shoulder connections which outperform conventional API connections to meet the needs of deep, extended and challenging wells with greater torsional capacities.
Roschen Heavy Weight Drill Pipe Grades Table
|Specs.||Type||Grade||Yield Strength||Tensile Strenght||Elongation||Hardness|
|Standard Welded||Tool Joint||AISI 413H||120000||140000||13||Min 285|
|Weld Zone||-||-||-||-||Max 344|
|Standard Integral||-||AISI 4137H Bar||110000||140000||13||Min 285|
|Contact Person :||Mr. Bill, George, Michael|