DOWNHOLE CAMERA AND LIGHTING APPARATUS AND METHOD
An illuminated camera apparatus can be used downhole in wellbores or other environments lacking ambient or available light. Light generated by a light emitting diode or other light source is pointed or reflected toward a glass light pipe that conveys such light past a camera or other visual image sensor. The conveyed light is diffused to evenly illuminate the surrounding environment into the field of view of the camera or other visual image sensor. At least one heat sink can be provided to absorb and/or retain heat, and isolate such heat from thermally sensitive components.
1 . A wellbore illumination and visual sensor assembly comprising:
a) a light source;
b) a substantially tubular light pipe having first end, a second end and a central bore extending there through; and
c) a visual sensor having a view field, wherein said sensor is disposed within said central bore, and light from said light source is conveyed via said light pipe past said visual sensor to illuminate said field of view.
2 . The wellbore illumination and visual sensor assembly of claim 1 , wherein said light source comprises at least one light emitting diode.
3 . The wellbore illumination and visual sensor assembly of claim 1 , wherein said second end of said tubular light pipe comprises a beveled light diffuser.
4 . The wellbore illumination and visual sensor assembly of claim 1 , wherein said light source is aimed substantially toward said first end of said light pipe.
5 . The wellbore illumination and visual sensor assembly of claim 1 , wherein said light source is aimed substantially toward a reflector adapted to reflect light substantially toward said first end of said light pipe.
6 . The wellbore illumination and visual sensor assembly of claim 5 , wherein said reflector is at least partially spherical in shape.
7 . The wellbore illumination and visual sensor assembly of claim 1 , further comprising at least one thermal insulation barrier disposed between said light source and said visual sensor.
8 . The wellbore illumination and visual sensor assembly of claim 1 , further comprising at least one latent heat storage assembly disposed between said light source and said visual sensor.
9 . The wellbore illumination and visual sensor assembly of claim 8 , wherein said at least one latent heat storage assembly comprises at least one substance with a high heat of fusion that is capable of storing and releasing energy.
10 . The wellbore illumination and visual sensor assembly of claim 1 , further comprising:
a) a double paned optic window; and
b) a free-rolling ball disposed between said panes.
11 . A wellbore illumination and video camera assembly comprising:
a) a pressure sealed housing having a first end, a second end and a length;
b) a substantially tubular light pipe having first end, a second end and a central bore extending there through, disposed within said housing;
c) a light source disposed within said housing; and
d) a video camera having a view field, wherein said video camera is disposed within said housing, and light from said light source is conveyed via said light pipe past said visual video camera to illuminate said field of view.
12 . The wellbore illumination and video camera assembly of claim 11 , wherein said light source comprises at least one light emitting diode.
13 . The wellbore illumination and video camera assembly of claim 11 , wherein said second end of said tubular light pipe comprises a beveled light diffuser.
14 . The wellbore illumination and video camera assembly of claim 11 , wherein said light source is aimed substantially toward said first end of said light pipe.
15 . The wellbore illumination and video camera assembly of claim 11 , wherein said light source is aimed substantially toward a reflector adapted to reflect light substantially toward said first end of said light pipe.
16 . The wellbore illumination and video camera assembly of claim 15 , wherein said reflector is at least partially spherical in shape.
17 . The wellbore illumination and video camera assembly of claim 11 , further comprising at least one thermal insulation barrier disposed between said light source and said video camera.
18 . The wellbore illumination and video camera assembly of claim 11 , further comprising at least one latent heat storage assembly disposed between said light source and said video camera.
19 . The wellbore illumination and video camera assembly of claim 18 , wherein said at least one latent heat storage assembly comprises at least one substance with a high heat of fusion that is capable of storing and releasing energy.
20 . The wellbore illumination and video camera assembly of claim 11 , further comprising:
a) a double paned optic window; and
b) a free-rolling ball disposed between said panes.