Patents Assigned to Drilltech Services (Asia) Pte Ltd
  • Sub assembly
    Patent number: 10392874
    Abstract: A sub assembly for coupling to a drill string, the assembly comprising; a mandrel; a sleeve arranged to be co-axially positioned about said mandrel; a first stop arranged to prevent axial movement of the sleeve along the mandrel in a first direction; a second stop arranged to prevent axial movement of the sleeve in a second direction; wherein said second stop is releasably engageable from the mandrel.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: August 27, 2019
    Assignee: DRILLTECH SERVICES (ASIA) PTE LTD
    Inventors: Guoxin Chen, Peng Pan, Tiaw Joo Kwee, Mark Kim Chong Teow
  • AN IMPROVED SUB ASSEMBLY
    Publication number: 20180291695
    Abstract: A sub assembly for coupling to a drill string, the assembly comprising; a mandrel; a sleeve arranged to be co-axially positioned about said mandrel; a first stop arranged to prevent axial movement of the sleeve along the mandrel in a first direction; a second stop arranged to prevent axial movement of the sleeve in a second direction; wherein said second stop is releasably engageable from the mandrel.
    Type: Application
    Filed: March 28, 2016
    Publication date: October 11, 2018
    Applicant: Drilltech Services (Asia) Pte Ltd
    Inventors: Guoxin CHEN, Peng PAN, Tiaw Joo KWEE, Mark Kim Chong TEOW