Apparatus for transporting measuring and/or logging equipment in a borehole
OwnerSerge A. Scherbatskoy, Jacob Neufeldinventors
Life of this patent
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Abstract
Apparatus for transporting measuring and/or logging equipment in a borehole filled with drilling fluid, the apparatus being in the form of a transporter body of normal diameter less than that of the borehole characterized by apparatus for effectively advancing the transporter in a borehole and for reducing the possibility that the transporter will become stuck in a borehole.
Claims21
Apparatus for transporting and/or logging equipment in a borehole having fluid therein, comprising:
- a transporter body dimensioned to be positioned in a borehole;
- means carried by said body to at least substantially contact the borehole wall around substantially the entire circumference thereof to form a piston relationship between said transporter body and the borehole;
- and
- means for moving fluid past said transporter body to create a differential fluid pressure across said means forming said piston relationship to thereby cause the transporter body to move in the borehole.
Cableless apparatus for making measurements in a borehole having fluid therein, comprising:
- a transporter body of diameter less that of the borehole;
- means to propel the body forwardly and rearwardly in the borehole fluid;
- an energy storage means within the transporter body connected to said propulsion means;
- at least one measuring instrument carried by said transporter body providing a recorded measurement signal;
- means to actuate said propulsion means to move said body forwardly and downwardly in the borehole;
- and means to actuate said propulsion means to move said body rearwardly and upwardly in the borehole.
Apparatus for transporting measuring and/or logging equipment in a borehole having fluid therein, comprising:
- an elongated transporter body;
- means carried by said body to cause the rotation thereof in the borehole;
- and
- means of non-rotatably attaching a cable to the rearward end of said body.
Apparatus for transporting measuring and/or logging equipment in a borehole having fluid therein, comprising:
- a transporter body dimensioned to be received in a borehole and having a forward and rearward end;
- means to propel said body in the borehole fluid;
- a cable extending from said transporter body to the earth's surface;
- means of carrying an additional length of cable with said body;
- and
- means of releasing said additional length of cable whereby said body may move forward for a distance equal to the length of said additional cable without pulling the cable extending to the earth's surface with it.
Apparatus for transporting measuring and/or logging equipment in a borehole having fluid therein, comprising:
- a transporter body of normal diameter less than the borehole, the transporter body carrying a plurality of subsurface sensors;
- electric powered means of propelling said transporter body through the fluid with the borehole;
- a cable extending from said transporter body to the earth's surface, the cable being formed at least in part by a plurality of information carrying conductors;
- and
- means of controllably switching said plurality of information carrying conductors from one mode in which different conductors connect different said subsurface sensors to logging electronics at the earth's surface;
- and in another mode in which said information carrying conductors are in parallel and connected to carry electrical energy from the earth's surface to said electric powered means of propelling said transporter body.
Apparatus for transporting measuring and/or logging equipment in a borehole having fluid therein, comprising:
- a transporter body of normal diameter less than the borehole;
- a cable attached to said transporter body extending to the earth's surface;
- means within said transporter of propelling it within said borehole by reaction with the fluid in the borehole;
- and
- means of retarding the rotation of the transporter body as it advances in the borehole.
Apparatus for transporting measuring and/or logging equipment in a borehole having fluid therein, comprising:
- a transporter body of normal diameter less than that of a borehole;
- a lightweight cable affixed to said body and extending to the earth's surface, the cable being of specific gravity not substantially greater than the borehole fluid;
- and
- means carried by said body of providing a positive motive force for moving said body and for pulling said cable within the borehole.
Dependencies are inferred from the claim text.