Inventor

ZIJSLING DJURRE HANS

NL42 patents

⚠️ This page may combine multiple inventors who share the name “ZIJSLING DJURRE HANS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ZIJSLING DJURRE HANS

SHELL OIL CO

Method and tool for fracturing an underground formation

Marking of pipe joints

Expander system for incremental expansion of a tubular element

Method and device for injecting a fluid into a formation

Percussion drilling head

Device for controlling weight on bit of a drilling assembly

Pipe expander

Joining expandable tubulars

Forge welding process

Expander system for stepwise expansion of a tubular element

Hybrid push and pull method and system for expanding well tubulars

Drill bit with protection member

Drill bit and system for drilling a borehole

Expanding a tubular element to different inner diameters

Drill bit

Pipe connector and method

Connector assembly

Method of creating a weld in a wellbore

Hydraulic drill string accumulator

Drill bit and system for drilling a borehole

Expansion assembly, top anchor and method for expanding a tubular in a wellbore

Expansion assembly, top anchor and method for expanding a tubular in a wellbore

System and method for creating a sealing tubular connection in a wellbore

Reducing swab pressure generated behind a well liner expansion cone

Method of expanding a tubular and expandable tubular

Combined casing system and method

Method and system for sealing a segmented expandable cone

Retrievable self-energizing top anchor tool

Method and system for locking an upper end of an expanded tubular within a host casing

Assembly and method for expanding a tubular element

Method and system for sealing an annulur space around an expanded well tubular

Low break out safety joint and method for releasably connecting a tubing expansion assembly to a drill string

WUBBEN ANTONIUS LEONARDUS MARIA

System and method for anchoring an expandable tubular to a borehole wall

System and method for anchoring an expandable tubular to a borehole wall

System and method for anchoring an expandable tubular to a borehole wall

System and method for anchoring an expandable tubular to a borehole wall

DI CRESCENZO DANIELE

System for lining a wellbore

Method and wellbore system

TUBEFUSE APPLIC B V

Forge welding tubulars

VAN RIET EGBERT JAN

Method and system for lining a section of a wellbore with an expandable tubular element

SCHILTE PAUL DIRK

Method and system for fixing an element in a borehole

HESSELS JOHANNES LOUIS LEONARDUS

Expanding a tubular element in a wellbore