Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
Apparatus for wireless transmission of measurement values from a probe in a well being drilled by a drill bit on a sectional drill rod, comprising an underground unit on a connecting section of the drill rod just above the drill bit and an aboveground unit at the earths surface, said aboveground unit having spaced terminals in the earth, the underground unit comprising two axially spaced electrodes on said connecting section of the drill rod and insulated from one another, a capacitor having its terminals connected respectively with said electrodes, an electrical energy source for charging the capacitor, a short circuiting switch for short circuiting said capacitor, sensing means for sensing measurement values it is desired to transmit and means connecting said sensing means to said short circuiting switch to control the frequency or duration of closing of said short circuiting switch in accordance with a coded value to be transmitted, the energy pulses resulting from said short circulating being transmitted from said electrodes through the earth to said terminals of said aboveground unit.
Claim 2
Dependent Claim
173 words
Apparatus for wireless transmission of measurement values from a probe in a well being drilled by a drill bit on a sectional drill rod, comprising an underground unit on a connecting section of the drill rod just above the drill bit and an aboveground unit at the earths surface, said aboveground unit having spaced terminals in the earth, the underground unit comprising two axially spaced electrodes on said connecting section of the drill rod and insulated from one another, a capacitor having its terminals connected respectively with said electrodes, an electrical energy source for charging the capacitor, a short circuiting switch for short circuiting said capacitor, sensing means for sensing measurement values it is desired to transmit and means connecting said sensing means to said short circuiting switch to control the frequency or duration of closing of said short circuiting switch in accordance with a coded value to be transmitted, the energy pulses resulting from said short circulating being transmitted from said electrodes through the earth to said terminals of said aboveground unit.
Claim 3
Dependent Claim
39 words
Apparatus according to claim 1, in which said drill rod is hollow for the circulation of fluid therethrough, and in which the electrical energy source comprises a generator and means driven by said circulating fluid for driving said generator.
Claim 4
Dependent Claim
37 words
Apparatus according to claim 1, in which said sensing means comprises a plurality of sensing elements for sensing different values, and said underground unit comprises means for selectively connecting said sensing elements with said short circuiting switch.
Claim 5
Dependent Claim
66 words
Apparatus according to claim 3, in which said aboveground unit further comprises control signal transmitting means and said underground unit further comprises a receiving circuit for receiving control signals transmitted from said aboveground unit, said receiving circuit being connected to and controlling said selective connecting means, whereby the selective connection of said sensing elements to said short circuiting switch is controlled by signals transmitted from aboveground.
Claim 6
Dependent Claim
45 words
Apparatus according to claim 4, in which said underground unit comprises a change-over switch for alternatively connecting said electrodes with said receiving circuit for reception of sensing element selection control signals and with said capacitor for transmission of measurement values from the selected sensing element.
Claim 7
Dependent Claim
43 words
Apparatus according to claim 5, in which said change-over switch is time sequence controlled to connect said electrodes with said receiving circuit for a predetermined period of time and then to connect said electrodes with said capacitor for a succeeding period of time.
Claim 8
Dependent Claim
46 words
Apparatus according to claim 4, in which said control signal transmitting means of said aboveground unit comprises a capacitor connected to said terminals in the earth and an intermittently operated short circuiting switch for short circuiting said capacitor to transmit control signals to said receiving circuit.
Claim 9
Dependent Claim
22 words
Apparatus according to claim 1, in which the drill rod forms one electrode of the underground unit and of the aboveground unit.
Claim 10
Dependent Claim
28 words
Apparatus according to claim 1, in which said aboveground unit comprises an amplifying circuit connected with said two terminals in the ground at a distance from one another.
Claim 11
Dependent Claim
24 words
Apparatus according to claim 1, in which said electrodes comprise two annular plates encircling said connecting section of the drill rod and insulated therefrom.