Geometrical instruments – Straight-line light ray type – Alignment device
Patent
1977-08-03
1979-02-27
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Alignment device
33302, 33304, 175 44, 175 61, 403359, G01B 524, E21B 47022
Patent
active
041411536
ABSTRACT:
A bottom hole survey apparatus is characterized by a survey instrument having a reference line therein, the instrument being receivable by the engagement of flanges provided along the instrument into keyways provided on the interior of a non-magnetic instrument barrel. When engaged, the reference line of the survey instrument is disposed in a predetermined angular relation with respect to the barrel. The barrel has means provided on the exterior thereof for receiving a visual sighting element thereon, the sighting element being in a predetermined angular relationship with respect to the reference line. At least one non-magnetic spacer element is connectable to the barrel, the spacer element being provided with an adapter having a T-shaped head thereon which is received within a corresponding T-shaped groove provided at the lower end of the instrument. A mule shoe element having a slot therein is adjustably connectable to the lower end of the spacer, the mule shoe slot being adapted to receive a second visual sighting element such that when the sighting elements are aligned the reference line within the instrument is within a predetermined axial alignment with the mule shoe slot. A torque transmitting sub element including a plurality of axially spaced arrays of circumferentially disposed ridges engageable with an array of circumferentially disposed grooves may be connected between the spacer and the mule shoe.
REFERENCES:
patent: 2088539 (1937-07-01), Stokenbury
patent: 2735652 (1956-02-01), Brady
patent: 3052309 (1962-09-01), Eastman
patent: 3726546 (1973-04-01), Brown
patent: 3938398 (1976-02-01), Bloom et al.
Martin, Jr. William D.
Wilson Industries, Inc.
LandOfFree
Bottom hole survey apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bottom hole survey apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bottom hole survey apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-716446