Abstract: A video logging tool is described which is particularly well adapted for production logging of oil or gas wells. The tool has both an end view optical system and a side view optical system for imaging side and end view on a CCD array in a camera.

Abstract: A flexible, modular ultrasonic pipe inspection apparatus, comprising a flexible, hollow shaft that carries a plurality of modules, including at least one rotatable ultrasonic transducer, a motor/gear unit, and a position/signal encoder. The modules are connected by flexible knuckle joints that allow each module of the apparatus to change its relative orientation with respect to a neighboring module, while the shaft protects electrical wiring from kinking or buckling while the apparatus moves around a tight corner. The apparatus is moved through a pipe by any suitable means, including a tether or drawstring attached to the nose or tail, differential hydraulic pressure, or a pipe pig. The rotational speed of the ultrasonic transducer and the forward velocity of the apparatus are coordinated so that the beam sweeps out the entire interior surface of the pipe, enabling the operator to accurately assess the condition of the pipe wall and determine whether or not leak-prone corrosion damage is present.

Abstract: A method and apparatus for remotely visually inspecting the interior of an elongated tank. The apparatus includes an articulated arm which extends into the tank through an access opening and is adapted to pivot at successive joints by operation of associated servomotors to enable it to follow a path along the axis of the tank. A TV camera is carried on the lead end of the arm and scans the interior of the tank through 360.degree. rotation about the tank axis. The arm carries the camera to the zones where the tank end walls are joined to the sidewall for viewing the zones from advantageous lines of view.

Abstract: Portable apparatus for inspecting the interior of a pipe comprises a battery operated television camera connected to one end of a coaxial cable which is adapted to be stored in a rotatable storage drum. The battery is mounted on the storage drum for rotation therewith and the drum is rotatably mounted on a stand. Relatively rotatable inductive coupling components are provided between the drum and stand for transmitting the camera output signal to a camera monitor such as a television receiver.

Abstract: The apparatus for video inspection of the interior surface of tubular goods, includes: an elongated mounting plate having a first and a second end; a first compartment at the first end of the mounting plate which has a light transmissive window facing the second end of the mounting plate; a second compartment at the second end of the mounting plate which has a light diffusing window facing the first end of the mounting plate; a video camera having a wide angle lens in the first compartment; a light source in said second compartment; a first prism disposed in front of said lens; and, external means for monitoring and recording camera output.The wide angle lens in combination with the first prism provides for a dual field of view, part of which is transmitted through the first prism for viewing a small circumferential area opposite the inclined side of the first prism, and, part of which constitutes a peripheral view of nearly the entire circumference, "C", of the tubular received directly by the lens.

Abstract: A method of inserting a sensor into a pipeline including the steps of securing a fitting onto the pipeline, tapping an opening in the pipeline through the fitting, installing a housing on the fitting, the housing having a nipple extending at an angle to the pipeline, attaching a sensor insertion assembly to the nipple, the insertion assembly having a launch tube movable axially between the insertion assembly and the pipeline, extending the launch tube from the insertion assembly and through the pipeline opening into the pipeline, the launch tube intersecting the pipeline at an acute angle and providing communication between the sensor insertion assembly and the interior of the pipeline, and passing a sensor from the insertion assembly and through the launch tube into the pipeline.

Abstract: An apparatus and method for inspecting the internal surfaces of a pressurized vessel, without disturbing the pressurized environment within the vessel. A specially configured apparatus is inserted through an open bore valve and emulates a chamber having like pressure with the pressurized vessel. A camera housing containing a CCTV camera is inserted through an open bore valve to enable in situ inspection the interior of a pressurized vessel without having to bleed off this pressure. The camera is inserted into the interior from a sealed connector pipe. A camera housing assembly gains entry to a predetermined depth in the vessel by a sealed reach pipe which rotates freely under pressure. A control pipe located axially inside the reach pipe controls camera tilt.

Abstract: A dual push-cable for mechanically and electrically connecting a video camera head to a video circuit to permit the head to be pushed down the inside a pipe and negotiate turns in the pipe as the push cable is forced down the pipe while permitting the video circuit to power and receive video signals from the video camera head. The push-cable comprises an elongate resilient flexible push member, and elongate electrical and/or fiber optic signal transmitting cable, and a hinge joining the push member and the signal transmitting cable in a substantially parallel spaced apart side-by-side relationship. The push member may be a cylindrical rod formed of fiberglass impregnated with epoxy resin. The electrical signal transmitting cable may be armored tri-axial cable.

Abstract: Apparatus for 360.degree. azimuthal imaging of steel casing employs a transducer that is rotated around the inside wall of the casing for inducing and measuring variations in induced flux density within the casing as an indication of changes in casing thickness.

Abstract: A device for photographing the interior of pipelines is disclosed. The device deposited at the pipeline's inlet and is drawn through the pipeline by fluid flow. The combination of a ballast device and a floatation device and a rudder maintain the device in proper orientation. The device is untethered and is powered by a battery carried in the vessel. A control circuit permits a time delay before operating the camera and lights.