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A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains wing deflector cams that divide the space between the housing and the rotor into a high-pressure chamber and a low-pressure chamber. The housing at one of its axial ends has a first bearing part for the r

A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains wing deflector cams that divide the space between the housing and the rotor into a high-pressure chamber and a low-pressure chamber. The housing at one of its axial ends has a first bearing part for the rotor, wherein the rotor at the side of the first bearing part is provided with a central inlet conduit that is connected with the rotor space for the supply of driving fluid. The housing has a second bearing part for the rotor, the housing at or near each rising part of the wing deflector cams being provided with one or more outlet ports that are connected with the rotor space and a connecting channel outside the second bearing part. The connecting channel is connected with an opening in the part of the rotor that serves for attaching a drill bit.

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A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains wing deflector cams that divide the space between the housing and the rotor into a high-pressure chamber and a low-pressure chamber. The housing at one of its axial ends has a first bearing part for the r

A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains wing deflector cams that divide the space between the housing and the rotor into a high-pressure chamber and a low-pressure chamber. The housing at one of its axial ends has a first bearing part for the rotor, wherein the rotor at the side of the first bearing part is provided with a central inlet conduit that is connected with the rotor space for the supply of driving fluid. The housing has a second bearing part for the rotor, the housing at or near each rising part of the wing deflector cams being provided with one or more outlet ports that are connected with the rotor space and a connecting channel outside the second bearing part. The connecting channel is connected with an opening in the part of the rotor that serves for attaching a drill bit. ality of clock pulses on said first clock signal up to a clock pulse in which said second buffer element receives said request, and wherein said second time interval comprises one clock pulse on said first clock signal after said first buffer element receives said information. 14. A computer system, comprising: a processor; a cache memory coupled to said processor, wherein said cache memory transfers information to a first buffer element, and wherein one or more agents coupled to said memory bus transfer a request signal to a second buffer element; a plurality of buffer elements coupled to said cache memory; a memory bus coupled to said plurality of buffer elements; and a comparator device coupled between two or more of said plurality of buffer elements for comparing said buffer elements. 15. The computer system of claim 14, wherein said comparator compares said information in said first buffer element to a portion of said request signal is said second buffer element for a first time interval, and wherein said comparator compares said portion of said request signal in said second buffer element to said information in said first buffer element for a second time interval. 16. The computer system of claim 15, wherein said information is transferred from said first buffer element to said memory bus when said information matches said portion of said request signal, and when said request signal is a read command. 17. The computer system of claim 15, wherein said information is purged from said first buffer element when said information matches said portion of said request signal, and when said request signal is a write command. 18. The computer system of claim 15, wherein said information is transferred from said first buffer element to a main memory via said memory bus, when said information does not match said portion of said request signal. 19. The computer system of claim 15, wherein said information is transferred to said first buffer element on a first clock signal, and wherein said request signal is transferred to said second buffer element on a second clock signal that is asynchronous with said first clock signal. 20. The computer system of claim 19, wherein said comparator conducts said compares on said first clock signal. 21. The computer system of claim 20, wherein said first time interval comprises a plurality of clock pulses on said first clock signal up to a clock pulse in which said second buffer element receives said request, and wherein said second time interval comprises one clock pulse on said first clock signal after said first buffer element receives said information. 22. A computer system, comprising: a processor; a cache memory coupled to said processor; a first buffer element coupled to said cache memory and to a memory bus, wherein said cache memory transfers information to said first buffer element on a first clock signal; a second buffer element coupled to said memory bus, wherein said second buffer element receives a request signal from said memory bus on a second clock signal that is asynchronous from said first clock signal; and a comparator device coupled to said first buffer element and to said second buffer element for comparing said first buffer element to said second buffer element for a first time interval, and for comparing said second buffer element to said first buffer element for a second time interval, wherein said information is transferred from said first buffer element to said memory bus when said information matches a portion of said request signal and when said request signal is a read command, and wherein said information is purged from said first buffer element when said information matches said portion of said request signal and when said request signal is a write command, and further wherein said information is transferred from said first buffer element to a main memory via said memory bus when said information does not match said portion of said request signal. 23.