API Integral Heavy Weight Drill Pipe

Integral Heavy Weight Drill Pipe is the industry standard for an intermediate weight drill stem member and is available in standard, spiraled and non-magnetic designs making it useful in a number of applications. It has drill pipe dimensions for easier handling. Heavy weight drill pipe utilizes a unique centre upset or wear pad to increase tube life, reduce hole drag and differential sticking problems.

STANDARD / CONVENTIONAL HEAVY WEIGHT DRILL PIPE

Customers have the choice of ordering standard (conventional) Heavy Weight Drill Pipes in both integral and welded forms.

All Integral HWDPs are made from modified AISI 4145H chromium molybdenum alloy steel. Integral HWDPs are manufactured from heat treated bars that conform to ASTM A-370 requirements. Mechanical and chemical properties of the steel are recorded in the relevant Mill Test Certificates and these are supplied with all HWDPs. The Mill Test Certificates guarantee a hardness value in the range of 285 to 341 BHN and an IZOD impact value of 40 ft-lbs. at room temperature at one inch below the surface. All the mechanical and chemical properties meet the requirements of API Spec. 7-1 (latest edition).

In the case of Welded HWDPs, the tubes are manufactured from normalized steel of AISI 1340 grade, whereas Tool Joint Material is similar to the AISI 4145H chromium molybdenum alloy steel mentioned above.

FEATURES AND BENEFITS:

• Extra-length tool joints provide ample space to recut the connections, reduce the wear rate on the OD and extend the service life.
• In order to extend the service life of connections, API Bore Back Box stress relief feature is standard for all box connections on HWDPs of 4” and larger sizes
• The entire centre upset protects the tube from OD wear by keeping the tube away from the hole wall, while at the same time reducing the risk of differential sticking.
• HWDP can be picked up with drill pipe elevators, for fast efficient handling on the rig floor.
•  

  Company Information

     Puyang Zhongshi Group Co., Ltd. is a member of Sinopec Corporation. As a national high-tech enterprise and scientific enterprise, we launch business in areas of science & technology, industry, and trade. 
  
  Our products have attained ISO9000 quality system certification. Some petroleum product machinery have passed the evaluation of API certification in the United States. Our products are exported to the Middle East, Europe, Africa and other overseas markets. We have registered in the Republic of the Sudan to set up a company. 
  
  Our group is located in Puyang City of Henan Province with beautiful landscape and convenient transportation. Puyang City has been granted titles of "China National Cultural City" and "China National Cultural City". 
  
  We persist in the policy of "technology is the guide and quality is our life". We believe that quality determines sustentation. We will provide customers with reliable and adaptable products and services on the basis of equality, mutual benefits and sincerity. We sincerely hope to develop friendly cooperation with both domestic and overseas colleagues, to create a prospect future together.