1. A downhole tool string component, comprising:
a first tubular body with a first and a second tool joint adapted to connect to adjacent tool string components, and a central bore adapted to pass drilling mud between the joints;
a sleeve circumferentially disposed about an outer surface of the first tubular body, the sleeve being rigidly attached to the outer surface at first and second sleeve ends; and,
a second tubular body disposed about the first tubular body and between the first tubular body and the sleeve, the second tubular body including at least two longitudinal segments wherein one of the longitudinal segments is a keystone segment.
2. The component of claim 1, wherein at least one of the at least two longitudinal segments comprises at least one pocket adapted to house drilling instrumentation equipment.
3. The component of claim 2, wherein the drilling instrumentation equipment comprises at least one of a pulse neutron generator, a nuclear detector, a seismic sensor, a sonic sensor, and an acoustic sensor.
4. The component of claim 2, wherein the segments comprise a thickness and at least one pocket extends through the entire thickness.
5. The component of claim 2, wherein the at least one pocket extends along an axis of the second tubular body a distance of 5 percent to 75 percent of a length of the second tubular body.
6. The component of claim 2, wherein the drilling instrumentation equipment disposed within the at least two pockets are adapted to be in electrical communication with each other.
7. The component of claim 2, wherein the drilling instrumentation equipment is connected to a downhole network.
8. The component of claim 1, wherein the second tubular body comprises plurality of longitudinal segments, and wherein the keystone segment contributes to the circumference of the second tubular body less than at least one of the other segments.
9. The component of claim 1, wherein the sleeve comprises a stabilizer blade and a recess formed in an inner diameter thereof, drilling instrumentation equipment being disposed at least partially in the recess.
10. The component of claim 9, wherein the recess is aligned with a pocket of the second tubular body, the drilling instrumentation equipment being disposed at least partially in the pocket.
11. The component of claim 1, wherein the second tubular body is held with a compression fit within the sleeve.
12. The component of claim 1, wherein at least one of the at least two longitudinal segments comprises a locking feature adapted to lock one longitudinal segment to another.
13. The component of claim 1, wherein the first tubular body comprises an anti-rotation device adapted to restrict the rotation of the second tubular body around the first tubular body.
14. A downhole tool string component, comprising:
a first tubular body with a first and a second tool joint adapted to connect to adjacent tool string components, and a central bore adapted to pass drilling mud between the joints;
a sleeve circumferentially disposed about an outer surface of the first tubular body, the sleeve being rigidly attached to the outer surface at first and second sleeve ends; and,
a second tubular body held within the sleeve through a compression fit, the second tubular body including a keystone segment.
15. The component of claim 14, wherein the second tubular body is segmented.
16. A logging tool, comprising:
a first tubular body with a first tool joint and a second tool joint adapted to connect to adjacent tool string components, said first tubular body including an outer surface and a central bore adapted to pass drilling mud between said joints;
a second tubular body disposed about said first tubular body, said second tubular body including a plurality of segments; and,
a sleeve circumferentially disposed about said second tubular body, said sleeve including at least one stabilizer blade, said sleeve being rigidly attached to said outer surface of said first tubular body, said sleeve holding said plurality of segments of said second tubular body in a compression fit.
17. The logging tool of claim 16, wherein said compression fit of said second tubular body reduces stress concentrations in said logging tool.
18. The logging tool of claim 16, wherein said stabilizer blade includes a recess formed in an inner diameter thereof, said recess including instrumentation equipment disposed at least partially therein.
19. The logging tool of claim 18, wherein the recess is aligned with a pocket formed within said second tubular body, the instrumentation equipment being disposed at least partially in the pocket.
20. The logging tool of claim 18, wherein the instrumentation equipment comprises at least one of a pulse neutron generator, a nuclear detector, a seismic sensor, a sonic sensor, and an acoustic sensor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A conductive material comprising a V2O5\u2014P2O5 glass and a second phase dispersed in the V2O5\u2014P2O5 glass, wherein the second phase contains a crystalline V and O compound and a crystalline metal phosphate compound.
2. The conductive material according to claim 1, wherein the crystalline V and O compound is an oxide selected from the group consisting of V2O5, V4O9, V2O4, and V2O3.
3. The conductive material according to claim 1, wherein the metal phosphate compound is a phosphate compound of transition metal or alkaline-earth metal.
4. The conductive material according to claim 3, wherein the metal phosphate compound is a phosphate compound containing a metal selected from the group consisting of Zn, Mg, Ca, Ba, Zr, W, Mo, and Fe.
5. The conductive material according to claim 1, wherein the material contains the crystalline V and O compound of 10% or more but not exceeding 50% by volume.
6. The conductive material according to claim 1, wherein the material contains the metal phosphate compound of 10% or more but not exceeding 50% by volume.
7. The conductive material according to claim 1, wherein the material contains V2O5 of 50% to 70% by weight and P2O5 of 20% to 40% by weight as components of the V2O5\u2014P2O5 glass.
8. A method of producing a conductive material with a crystalline V and O compound and a crystalline metal phosphate compound, by mixing V2O5\u2014P2O5 glass with metal oxide combined with phosphoric acid and heating such a mixture.
9. The method of producing a conductive material according to claim 8, wherein the metal oxide is an oxide of transition metal or alkaline earth metal.
10. The method of producing a conductive material according to claim 8, wherein the metal oxide is an oxide containing a metal selected from the group consisting of Zn, Mg, Ca, Ba, Zr, W, Mo, and Fe.
11. The method of producing a conductive material according to claim 8, wherein the material contains V2O5 of 50% to 70% by weight and P2O5 of 20% to 40% by weight as components of V2O5\u2014P2O5 glass.
12. A visual display device comprising a glass panel with electronic sources, a glass panel with fluorescent material that emits light when receiving electrons emitted from the electron sources, and glass spacers which provide spaces between the glass panels,
wherein the glass spacers are bonded to the glass panels with a conductive material containing a V2O5\u2014P2O5 glass and a second phase dispersed in the V2O5\u2014P2O5 glass, and
wherein the second phase contains a crystalline V and O compound and a crystalline metal phosphate compound.
13. The visual display device according to claim 12, wherein the electric resistivity of the conductive material is 10 \u03a9cm or more but not exceeding 109 \u03a9cm.
14. The visual display device according to claim 12, wherein the glass transition point of the conductive material which bonds one end of the glass spacer is different from the glass transition point of the conductive material which bonds the other end of the glass spacer.
15. A glass spacer for a visual display device, which is interposed between a glass panel with electron sources and a glass panel with fluorescent material that emits light when receiving electrons emitted from the electron sources,
wherein the glass spacer is bonded to the glass panels with a conductive material comprising a V2O5\u2014P2O5 glass and a second phase dispersed in the V2O5\u2014P2O5 glass,
wherein the second phase contains a crystalline V and O compound and a crystalline metal phosphate compound.