Apparatus and method for modifying the sidewalls of a borehole
AssigneeSinvent AS
InventorsMohammad Ali Taghipour Khadrbeik, Inge Manfred Carlsen
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Abstract
The present invention concerns an apparatus for modifying sidewalls of a borehole. The apparatus includes a longitudinal housing adapted to fit inside the borehole. The housing includes a first end portion, a second end portion, and a side portion between said end portions, adapted to face the sidewalls of the borehole. Means are provides on the side of the housing for removing material from said borehole sidewall. The housing is adapted to be rotated with a controlled rotational speed in relation to said borehole sidewalls and to be fed in a controlled rate of longitudinal motion in relation to said borehole. Furthermore, the invention relates to a method for making a borehole with internal, helical grooves.
Claims14
An apparatus for modifying sidewalls of a borehole, comprising:
- a longitudinal housing configured to fit inside the borehole, wherein the housing has a longitudinal axis, a first end portion, a second end portion, and a side portion extending between said end portions, wherein the side portion is configured to face the sidewalls of the borehole;
- a cutting member extending from the side portion of the housing, wherein the cutting member comprises a mill configured to rotate relative to the housing and remove material from said borehole sidewall as the housing advances axially into the borehole, and wherein said housing is configured to be rotated with a controlled rotational speed in relation to said borehole sidewalls and to be axially advanced relative to the borehole at a controlled rate of longitudinal motion;
- and
- an actuator configured to rotate the mill it of the rotation of the housing.
A method for making a borehole having a sidewall with internal, helical grooves, comprising:
- installing an apparatus with a longitudinal housing adapted to fit inside the borehole, said housing includes a first end portion, a second end portion, and a side portion extending between said end portions;
- rotating a cutting member extending from the side portion of the housing relative to the housing to remove material from said borehole sidewall as the housing advances into the borehole;
- rotating the housing with a controlled rotational speed in relation to said the borehole sidewalls;
- and
- feeding the housing in a controlled rate of longitudinal motion in relation to said borehole.
Dependencies are inferred from the claim text.