초록 ▼

In accordance with illustrative embodiments of the present invention, well logging data in analog or digital form is recorded by a cathode ray tube recorder. A representation of the CRT beam is repetitively swept across a recording medium while being modulated with representations of the well loggin

In accordance with illustrative embodiments of the present invention, well logging data in analog or digital form is recorded by a cathode ray tube recorder. A representation of the CRT beam is repetitively swept across a recording medium while being modulated with representations of the well logging signals. This modulation varies as a function of the rate of change of the well logging signals to produce an even density recording. Coding of the recorded lines or traces and the areas between selected traces can be accomplished. This coding of the lines is also varied in dependence on the well logging signal rate of change to produce a uniform coding presentation. Depth information can be recorded on the recording medium by writing depth numbers and depth lines on the record medium. Moreover, a section by section visual presentation of the data can be produced while it is being recorded.

대표청구항 ▼

In apparatus for recording well logging signals representative of at least one subsurface characteristic at various depth levels in a borehole, apparatus for writing depth lines, comprising: a. means for producing depth signals representative of incremental changes in the depth levels of well loggin

In apparatus for recording well logging signals representative of at least one subsurface characteristic at various depth levels in a borehole, apparatus for writing depth lines, comprising: a. means for producing depth signals representative of incremental changes in the depth levels of well logging signals to be recorded; b. a recording medium; c. means adapted for directing energy at selected positions on said recording medium; d. means responsive to said depth signals for modulating the intensity of said energy to repetitively produce selected numbers of depth lines on said recording medium at preselected locations spaced at multiples of uniform seleCted intervals on the medium corresponding to said depth levels, the number of said depth lines produced on said recording medium at each preselected location being related to the distance between the preselected locations and being grouped at those preselected locations on the recording medium.