High resolution telemetry for random pulse outputs

Claim 1

A method of accommodating random pulses generated at frequencies above the passband of a well logging transmission channel comprising: storing indications of the random pulses, generating pulses only at frequencies within said passband of said transmission channel in response to the stored indications, storing said generated pulses, encoding the stored pulses to reduce the required bandwidth for transmission thereof, and transmitting the encoded pulses uphole via said transmission channel.

Claim 2

A method of accommodating random pulses generated at frequencies above the passband of a well logging transmission channel comprising: storing indications of the random pulses, generating pulses only at frequencies within said passband of said transmission channel in response to the stored indications, storing said generated pulses, encoding the stored pulses to reduce the required bandwidth for transmission thereof, and transmitting the encoded pulses uphole via said transmission channel.

Claim 3

A method of accommodating random pulses generated at frequencies above the passband of a well logging transmission channel comprising: storing indications of the random pulses, generating pulses only at frequencies within said passband of said transmission channel in response to the stored indications, storing said generated pulses, encoding the stored pulses to reduce the required bandwidth for transmission thereof, and transmitting the encoded pulses uphole via said transmission channel.

Claim 4

A method of accommodating random pulses generated at frequencies above the passband of a well logging transmission channel comprising: storing indications of the random pulses, generating pulses only at frequencies within said passband of said transmission channel in response to the stored indications, storing said generated pulses, encoding the stored pulses to reduce the required bandwidth for transmission thereof, and transmitting the encoded pulses uphole via said transmission channel.

Claim 6

A method of pulse transmission comprising: storing first bits in response to random pulses, generating pulses at a uniform rate in response to the stored bits, storing second bits for every generated pulse, enabling generation of said pulses only when the number of said stored first and second bits bear a predetermined relationship to one another, storing the generated pulses, encoding the stored pulses to reduce the required bandwidth for transmission thereof, and transmitting the encoded pulses to a remote location.

Claim 7

A method of pulse transmission comprising: storing first bits in response to random pulses, generating pulses at a uniform rate in response to the stored bits, storing second bits for every generated pulse, enabling generation of said pulses only when the number of said stored first and second bits bear a predetermined relationship to one another, storing the generated pulses, encoding the stored pulses to reduce the required bandwidth for transmission thereof, and transmitting the encoded pulses to a remote location.

Claim 9

A system for pulse transmission comprising: first means for storing bits in response to generation of random first pulses, means for generating second pulses at a uniform rate in response to the stored bits, second means for storing bits for each said second pulse, means for enabling generation of said second pulses only when the number of said stored bits in said first and second means bear a predetermined relationship to one another, register means for storing said second pulses, and encoder means for encoding said stored second pulses in order to reduce the required bandwidth for transmission thereof.

Claim 10

A system for pulse transmission comprising: first means for storing bits in response to generation of random first pulses, means for generating second pulses at a uniform rate in response to the stored bits, second means for storing bits for each said second pulse, means for enabling generation of said second pulses only when the number of said stored bits in said first and second means bear a predetermined relationship to one another, register means for storing said second pulses, and encoder means for encoding said stored second pulses in order to reduce the required bandwidth for transmission thereof.

Claim 12

A system for accommodating random pulses having frequencies above the passband of a well logging pulse transmission channel which comprises: a. first and second accumulator registers, b. circuit means for applying said pulses to said first register, c. a comparator for producing an output level when the pulses stored in said first and second registers bear a predetermined relationship to each other, d. gate means for performing an AND function connected at one input to the output of said comparator, e. a synchronizing clock connected to the second input of said gate means, said clock having a pulse rate within said passband, f. pulse generating multivibrator means connected at its output to the input of said second register and connected at its input to the output of said gate means and adapted to be actuated in response to a predetermined portion of the output clock pulses passed by said gate means, and g. circuit means for connecting the output of said pulse generating means to said pulse transmission channel.

Claim 13

A system for accommodating random pulses having frequencies above the passband of a well logging pulse transmission channel which comprises: a. first and second accumulator registers, b. circuit means for applying said pulses to said first register, c. a comparator for producing an output level when the pulses stored in said first and second registers bear a predetermined relationship to each other, d. gate means for performing an AND function connected at one input to the output of said comparator, e. a synchronizing clock connected to the second input of said gate means, said clock having a pulse rate within said passband, f. pulse generating multivibrator means connected at its output to the input of said second register and connected at its input to the output of said gate means and adapted to be actuated in response to a predetermined portion of the output clock pulses passed by said gate means, and g. circuit means for connecting the output of said pulse generating means to said pulse transmission channel.

Claim 14

A system for accommodating random pulses having frequencies above the passband of a pulse transmission channel which comprises: first and second accumulator registers, circuit means for applying said pulses to said first register, a comparator for producing an output level when the pulses stored in said first and second registers bear a predetermined relationship to each other, gate means connected at one input to the output of said comparator, a synchronizing clock connected to the second input of said gate means, said clock having a pulse rate within said passband, pulse generating means connected at its output to the input of said second register and connected at its input to the output of said gate means and adapted to be actuated in response to the output clock pulses passed by said gate means, circuit means for connecting the output of said pulse generating means to said pulse transmission channel, bandwidth reduction circuitry connected between said circuit means and said pulse transmission channel, said bandwidth reduction circuitry including means for storing the output signals from said pulse generating means, and encoder means for encoding the stored signals prior to transmission through said pulse transmission channel.

Claim 15

A system for accommodating random pulses having frequencies above the passband of a pulse transmission channel which comprises: first and second accumulator registers, circuit means for applying said pulses to said first register, a comparator for producing an output level when the pulses stored in said first and second registers bear a predetermined relationship to each other, gate means connected at one input to the output of said comparator, a synchronizing clock connected to the second input of said gate means, said clock having a pulse rate within said passband, pulse generating means connected at its output to the input of said second register and connected at its input to the output of said gate means and adapted to be actuated in response to the output clock pulses passed by said gate means, circuit means for connecting the output of said pulse generating means to said pulse transmission channel, bandwidth reduction circuitry connected between said circuit means and said pulse transmission channel, said bandwidth reduction circuitry including means for storing the output signals from said pulse generating means, and encoder means for encoding the stored signals prior to transmission through said pulse transmission channel.

Claim 18

A system for pulse transmission comprising: a first reversible register for accumulating input pulses, a second reversible register connected in series with said first register, first and second gate means connected to the outputs of said first and second registers, clock means for providing clock pulses to the inputs of said gate means, wherein the output of said first gate means is representative of a first prescribed number of input pulses and the output of said second gate means is representative of a second prescribed number of input pulses, and encoder means for encoding and transmitting the outputs of said first and second gate means.

Claim 19

A system for pulse transmission comprising: a first reversible register for accumulating input pulses, a second reversible register connected in series with said first register, first and second gate means connected to the outputs of said first and second registers, clock means for providing clock pulses to the inputs of said gate means, wherein the output of said first gate means is representative of a first prescribed number of input pulses and the output of said second gate means is representative of a second prescribed number of input pulses, and encoder means for encoding and transmitting the outputs of said first and second gate means.