Data communications system
AssigneeZenith Oilfield Technology Limited
InventorDavid Sirda Shanks
Life of this patent
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Abstract
A data communications system and method for transmitting data over a string between a surface location and a sub-surface location in a well bore in which a load varying device at the sub-surface varies the mechanical load on the string to be indicative of the data and a load measuring apparatus at surface monitors the mechanical load on the string and decodes the data. Data transmission is described from a pump assembly through a sucker rod string. Embodiments of load varying devices using electrical generators, friction rollers and hydraulic and pneumatic brakes are also described.
Claims20
A data communications system for transmitting data over a string between a surface location and a sub-surface location in a well bore, said data communications system comprising:
- a sub-surface system module including a load varying means to vary mechanical load on the string to be indicative of the data;
- and
- a surface system module including load measuring apparatus to monitor the mechanical load on the string and a processor for determining the data from variation in the load, wherein the mechanical load is varied by varying a force between a stator and an actuator of the load varying means.
A method of transmitting data on a string between a surface location and a sub-surface location in a well bore, comprising:
- altering a mechanical load on the string at the subsurface location by a load varying means, the load being altered to convey data;
- monitoring the change in mechanical load on the string at the surface;
- and
- decoding the data,
- wherein the mechanical load is changed by varying a force between a stator and an actuator of the load varying means.
Dependencies are inferred from the claim text.