Drilling Tools


Petrosas is a major supplier of different types of drilling tools and equiment such as API 5CT / API 5L / API 5B / OCTG coupling, pup joint, seamless steel tubing & casing pipe, screen pipe, crossover & customizing products.


Casing coupling is a short pipe applied in connecting two casing pipes which have threads. The pipe coupling has internal threads machined to match the external thread of the long joints of casing. The two joints of casing pipes are screwed into opposite ends of the casing coupling. Through their strength can be normally made of the same grade of steel as the casing. All casing couplings are manufactured in accordance with API 5CT specification of the latest edition.

Properties of Casing Couplings:

  • The material of casing couplings is H40, J55, K55, M65, N80-1, N80Q, L80, C95, T95 and P110 grade steel with high quality and good performance
  • The outer diameter ranges from 127mm to 365.12 mm
  • The casing couplings thread patterns include short round thread, long round thread and buttress thread.
  • Tubing coupling is a kind of drilling tool available in oil field. Tubing couplings are mainly used in connecting oil pipes.

    Properties of Tubing Coupling:

  • The material of tubing couplings is H40, J55, N80-1, N80Q, L80, C90, T95 and P110 grade steel with high quality and good performance;
  • It is mainly used to connect two oil pipes;
  • The tubing coupling thread patterns include non-upset thread and upset thread;
  • The outer diameter of tubing coupling ranges from 55.88 mm to 141.3 mm;

    A pup joint is Casing, Pipe or Tubing shorter in length than a standard tubular string. This allows for the adjustment and installation of tools and various tubular components when placement downhole is critical for a specific project. A Spacer Pipe is another reference used to identify pup joints. Pup joint features consist of connections, lengths, weights and material grad

    API Tubing Pup Joints

    Manufactured according to API Spec 5CT using prime API monogrammed, seamless oil country tubing. Optional diameters, lengths, weights, and grades are available upon request

    Casing Pup Joints

    Any length, weight, and grade are available upon request


    By acting as adapters between two dissimilar connections, crossovers help them fit together safely. Crossovers operate similarly to the majority of adapter kinds. The tool's opposite end fits the second piece that needs to be joined while the tool's other end fits the size and thread of the first piece. Crossovers allow the two pieces to fit together even when they wouldn't otherwise.


    Diameter: from 4 1/2 inch to 20 inch (48.26mm - 508mm) ( Casing) Size: OD: 48.26mm-114.3mm (Tubing) Nominal Weight: from 9.5 lb/ft to 169 lb/ft, from 9.5 ppf to 169 ppf Lenght: R1, R2, R3