METHOD AND APPARATUS FOR REAL TIME STREAMING AND ONBOARD RECORDATION OF VIDEO DATA
A method and apparatus for visual inspection of wellbore environments wherein a real-time video feed is received at the earth's surface from a camera assembly positioned downhole within a wellbore. The camera system is capable of recording high quality video images in full streaming quality and speed in either color or black and white bands, simultaneously transmitting live visual images to the earth's surface, and accepting and acting upon commands from the surface (including, without limitation, recording programmability).
1 . A method for obtaining and transmitting images from a downhole wellbore environment, the method comprising the steps of:
(a) providing a camera apparatus, the camera apparatus including a video camera, an onboard memory, a digital signal processor (DSP), an advanced RISC machine- (ARM-) based processor; a remote surface command processor, and a power supply configured to supply power to the camera apparatus and all of its component parts;
(b) providing a downhole telemetry device in data communication with the camera apparatus;
(c) suspending the camera apparatus and the telemetry device from a length of downhole electric line (e-line);
(d) lowering the camera apparatus and the telemetry device into a wellbore;
(e) exchanging data between the surface and the camera apparatus via the e-line and the telemetry device;
(f) simultaneous with step (e), powering the camera apparatus and telemetry device via the e-line;
(g) responsive to surface commands sent to the remote surface command processor via the e-line, causing the camera assembly to acquire video information regarding the surrounding wellbore;
(h) in real time, causing the DSP to process the video information acquired in step (g) into a digital video signal, and to send the digital video signal to the ARM-based processor;
(i) still in real time, causing the ARM-based processor (1) to store the digital video signal in the onboard memory, and (2) to transmit, responsive to surface commands sent via the telemetry device and the e-line, a lower frame-rate version of the digital video signal to the surface.
2 . The method of claim 1 , in which step (h) further includes the substep of causing the DSP to process the video information acquired in step (g) by performing at least one action on the video information selected from the group consisting of (1) measuring, (2) filtering and (3) compressing.
3 . The method of claim 1 or 2 in which step (h) further includes the substep of causing the DSP to process the video information into a digital video signal having a frame rate of at least 30 frames per second.
4 . The method of any of claims 1 - 3 , in which the video information in step (g) is in an analog format.
5 . The method of any of claims 1 - 4 , in which step (i) further includes the substep of varying, responsive to surface commands sent via the telemetry device and the e-line, the frame rate of the lower frame-rate digital video signal transmitted to the surface.
6 . The method of any of claims 1 - 5 , further comprising:
(j) causing the ARM-based processor to selectively transmit, responsive to surface commands sent via the telemetry device and the e-line, a predetermined length of the digital video signal.
7 . The method of claim 6 , in which the predetermined length of the digital video signal is one frame.