Drillpipe

API 5DP drill pipe is a kind of steelpipe with screw thread in the pipe end. It is used for connecting ground rigequipment and drilling grinding equipment at the bottom of drilling wells. Themain purpose of drill pipes is to transport drilling mud to the drill bit. Itrises up, lowers and rotates together with the drill bit. Its strength mustwithstand the pressure, torque, vibration and other forces caused by the drillhole. In the oil and gas exploration and refining process, API 5DP drill pipecan be used for multiple times. We provide a number of drill pipes available invarious sizes and weights to meet the drilling needs of companies in the oiland gas industry.

Functions API 5DP drill pipe is mainlyapplied in oil and gas exploration and development, such as in the constructionof deep wells, horizontal wells and large-displacement wells. Its mainfunctions are as follows:

•      Drillpipes deliver torque and drive the drill bit to drill wells.

•      Exertpressure that can break the rock at the bottom of well on the drill bit.

•      API5DP drill pipe transmits flushing fluid. Through the ground high-pressure slushpump or mud pump, drill mud enters into the inner hole of drill string, flowsinto the bottom of well to wash rock debris and to cool down the drill bit,passes through the annular space between the drill string outer surface andwell wall (carrying rock debris), returns to the ground. Thus, we achieve thewell drilling purpose.

Applicable Scopeof API 5DP Drill Pipe

•      Itcan be applicable for series of oil drill pipes with API E75 to S135 steelgrades and the outer diameter of 2 3/8″ to 6 5/8″.

•      Itcan be used as double circular bead joint drilling pipe with high torsionalperformance.

•      Itcan be applied as BNK C95S drilling pipe of special steel grades for sulfur oilwells.

•      API5DP drill pipe is furnished in the following API length ranges: range 1 (18 ftto 22 ft), range 2 (27 ft to 30 ft) and range 3 (38 ft to 45 ft).

Advantages of our Drill Pipes

•      Quality Inspection

•      OurAPI 5DP drill pipe has received API 5D standard certification. In order toensure product quality, our company implements a comprehensive detection andcontrol system, and develops a strict management system.

•      1)Specific products carry out the second party supervision, third-partysupervision and third-party inspection. Currently there are more than 10companies in long-term resident supervision. Almost all key drill pipes areunder third-party or second party supervision.

•     2)We make use of advanced ERP information management system. From batch feedingto finished API 5DP drill pipe, we strictly implement tracking management toensure product traceability.

•      3)We manufacture key products in strict accordance with quality plan. There aredifferent quality plans for new product development, mass production ofproducts, major products and all of the second or third-party supervisedproducts. We also hold preparation meetings before production and issue thequality plans to the relevant quality executive departments. The executivedepartments should produce and inspect drill pipes in strict accordance withquality plans to ensure product quality.

•      Equipment Advantage

•      1)Our API 5DP drill pipe welding production line is configured with one CG1600inertia friction welder, nine sets of Q1319-1A pipe threading machines, twosets of CNC pipe threading machines, seven welded bead heat treatment mediumfrequency induction heating furnaces, internal bore grinding machine,straightening machine, bending testing machine and three sets of inspectionmachines. This line for drill pipes can produce 20,000 tons of dill pipes everyyear.

•      2)Our API 5DP drill pipe adopts upset welding method. The upsetting productionline is equipped with three induction heating furnaces, one upsetting machineand one set of ancillary equipment. The annual production of drill pipes is10,000 tons. After upset welding, the drill pipe acquires good wear resistance,high joint strength, high machining precision, high welding strength, goodoverall performance, low price and high cost performance.

•      3)The surface nitriding treatment of screw thread can effectively prevent threadgluing, improve the wear resistance of thread, and thereby enhance the servicelife of the API 5DP drill pipe. Thickness of the nitration layer is generallyfrom 0.2 mm to 0.3 mm. Too large thickness is easy to cause cracking flaws. Toosmall thickness will result in poor thread gluing resistance. Integrated drillpipes should do phosphate treatment with much smaller thickness, rather thannitriding treatment.

•      4)Joint thread should be processed by the thread turning tool on the CNC lathe.We make efforts to improve the thread surface quality, reduce the surfaceroughness (Ra ≤ 1.6μm), improve the degree of finish and reduce stressconcentration. These measures can ensure the interchangeability of API 5DPdrill pipes. The standoff of joint threads should be controlled in a reasonablerange so as to ensure a good drill thread engagement.

•      Performance Advantage

•      Ourdrill pipes' body has high tensile strength, good bending performance and goodtoughness. The body uses carbon alloy seamless steel pipe. Alloying elementsshould contain more Cr, Mo and other elements to improve the tensile strengthand impact toughness, and contain Mn, Si and other elements to improve theelasticity of the material (i.e. bending performance). Mechanical properties ofAPI 5DP drill pipes are as follows:

Drill Pipe

Mechanical Properties ofAPI 5DP Drill Pipes

·        Other Advantages

·        1) Our drill pipes are manufactured in accordancewith API 5DP standards. It has low levels of P and S chemical compositions(containing P with the amount of less than or equal to 0.015 and with less thanor equal to 0.003 S).

·        2) The body of Our API 5DP drill pipe has betterthickness evenness, fewer rolling defects and higher finished product rate.