West Drilling Products As

Engineering & Drilling Machinery As

Bjorn Eilertsen

Odd B Skjaerseth

A pipe-handling system includes at least two pipe-handling units arranged in a vertically displaceable manner along respective guide tracks of, respectively, first and second portions of a tower. The pipe-handling unit is provided with lower and upper rotary units spaced apart vertically on a chassis. Each of the rotary units is provided with a rotatable tong and a hanging-off device. A method is for inserting and withdrawing a pipe string in/from a borehole by the use of the pipe-handling system.

Device for a pipe handling unit and method of inserting and withdrawing a pipe string in/from a borehole

A circulation unit and an arrangement are arranged to continuously circulate drilling fluid during drilling. A housing is provided with a center bore arranged to accommodate a portion of a pipe. The center bore includes upper and lower sealing elements. The sealing elements are provided with center openings which, by the expansion of said sealing elements, are closable or fit tightly against the pipe by the abutment of an inner sealing surface against the pipe. Each of the sealing elements is connected in a fluid-tight manner to a packing pipe which is located in the housing and which is rotatable around the center axis of the center bore. The packing pipe is surrounded by a packing assembly fitting tightly between the periphery of the packing pipe and the housing.

Continuous drilling fluid circulation unit and arrangement

A circulation unit is for an arrangement arranged to continuously circulate drilling fluid during drilling. A housing is provided with a center bore which is defined by upper and lower annular sealing elements which are rotatably supported in the housing. The sealing elements are provided with a center opening which, by the expansion of said sealing elements, is closable or fits tightly against a pipe. A gate valve in a closed state forms a fluid-tight partition between upper and lower chambers in the housing. Each of the sealing elements is connected in a fluid-tight manner to a rotatable packer pipe surrounded by a packer assembly that fits tightly against the circumference of the packer pipe and against the housing. An arrangement is for the continuous circulation of drilling fluid during drilling, including as circulation unit arranged between upper and lower rotary units.

Arrangement for continuous circulation of drilling fluid during drilling operations

A piston pump assembly having a single drive gear assembly associated with two adjacent pump cylinders. Each pump cylinder has a separate valve unit associated therewith. The two pump cylinders have a common piston rod having a pump piston arranged at each end. The piston pod is formed as a toothed rack and the drive gear assembly includes motor-driven gearwheels engaged with the toothed rack.

Growing community of inventors

Hundvag, Norway

Bjorn Eilertsen