Abstract: This invention relates to an elongated wireline entry device (10) which allows a wireline tool or coiled tubing with a tool attached to be inserted in a well bore without disconnection form the drill string appended thereto without introducing bending moments into the threaded connections (101, 106, 202) attached to the drill string because the pin and box connections of the tool are in axial, longitudinal alignment, the absence of these bending moments is required to suspend long pendular, and therefore heavy, drill strings for this device without failure. The angle between the longitudinal ayes of the longitudinal passage and the wireline passage in the wireline entry device is at most 4.0°.

Abstract: This invention relates to an elongated wireline entry device (10) which allows a wirelein tool or coiled tubing with a tool attached to be inserted in a well bore without disconneciton form the drill string appended thereto without introducing bending moments into the threaded connectiosn (101, 106, 202) attached to the drill string because the pin and box connectiosn of the tool are in axial, longitudinal alignment. The absence of these bending moments is required to suspend long pendular, and therefore heavy, drill strings forr htthis device without failure. The angle between the longitudinal ayes of the longitudinal passage and the wireline passage in the wireline entry device is at most 4.0°.

Abstract: Hook- and-loop-type tapes are selectively attached to a video display unit and to flexible elongated strips of magnetic material so that the strips of magnetic material may be removably mounted around the video display unit in orthogonally intersecting planes to absorb magnetic radiation from the source. Each strip of magnetic material has a grain orientation parallel to its longitudinal axis and may be formed from grain-oriented ferromagnetic material in the range from M3 to M7. A multiple-layer magnetic shielding material is provided by securing first and second layers of such grain-oriented ferromagnetic material together with the grain orientation of the first layer orthogonal to the grain orientation of the second layer. Each strip of magnetic material may also be formed from this multiple-layer magnetic shielding material.