1. A movable solar array comprising:
(a) an elongated support truss having a polygonal axial cross-section with:
(i) V-shaped longitudinal members forming corners of the polygonal axial cross section;
(ii) an open web fixedly attached between each V-shaped longitudinal member extending the length of the elongated support truss along each side of the polygonal axial cross-section; and
(iii) an end member fixedly attached at each end of the elongated support truss with a shaft extending longitudinally outwardly from the end member adapted to engage a drive to longitudinally rotate the elongated support truss,
(b) solar panels attached along one side of the elongated support truss of polygonal axial cross-section, and
(c) at least one rotatable drive capable of rotatably driving the shafts at the end of the elongated support truss to move the solar panels in relation to a change of direction of incoming solar energy.
2. The movable solar array as claimed in claim 1 where the polygonal axial cross-section is selected from the group consisting of a triangular cross-section and a rectangular cross-section.
3. The movable solar array as claimed in claim 1 where each open web is formed of steel joist webbing.
4. The movable solar array as claimed in claim 1 where the V-shaped longitudinal supports are L-shaped longitudinal members.
5. The movable solar array as claimed in claim 1 where the open web is welded to the V-shaped longitudinal supports.
6. The movable solar array as claimed in claim 1 where the outwardly extending shaft is located at a position other than the center of mass of the elongated support truss of polygonal cross section.
7. A rotatable elongated support truss capable of use in an assembled solar array comprising:
(a) V-shaped longitudinal members forming corners of the polygonal axial cross section;
(b) an open web fixedly attached between each V-shaped longitudinal support along each side of the polygonal axial cross-section extending the length of the elongated support truss, and
(c) an end member fixedly attached at each end of the elongated support truss including a shaft extending from the end member adapted to engage a drive to longitudinally rotate the elongated support truss.
8. The rotatable elongated support truss as claimed in claim 7 where the polygonal axial cross-section is selected from the group consisting of a triangular cross-section and a rectangular cross-section.
9. The rotatable elongated support truss as claimed in claim 7 where the open web is formed of steel joist webbing.
10. The rotatable elongated support truss as claimed in claim 7 where the V-shaped longitudinal supports are L-shaped longitudinal members.
11. The rotatable elongated support truss as claimed in claim 7 where the open web is welded between the V-shaped longitudinal supports.
12. A method for collecting solar energy comprising the steps of:
(a) assembling an elongated support truss of a polygonal axial cross-section with:
(1) V-shaped longitudinal supports forming corners of the elongated support truss of polygonal axial cross-section,
(2) open webs fixedly attached between each V-shaped longitudinal support along each side of polygonal axial cross-section extending the length of the elongated support truss,
(3) an end member fixedly attached at each end of the support truss including a shaft extending longitudinally outwardly from the end member adapted to engage a drive to longitudinally rotate the elongated support truss,
(b) attaching solar panels along one side of polygonal cross-section of the elongated support truss, and
(c) assembling at least one rotatable drive capable of rotably driving the shafts at the end of the elongated support truss to move the solar panels corresponding to a change of angle of incoming solar energy incident upon the solar panels,
(d) capturing the incoming solar energy using the solar panels by rotating each solar array in relation to a change of angle of the incoming solar energy; and
(e) transforming the captured incoming solar energy into electrical energy for an electrical system.
13. The method for capturing solar power as claimed in claim 12, where the electrical system is a battery.
14. The method for capturing solar power as claimed in claim 12, where the electrical system is a municipal power grid.
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 well drilling and servicing fluid comprising an aqueous liquid, a biopolymer viscosifier, a particulate magnesia bridging agent wherein the magnesia has an Activity Index greater than about 800 seconds, wherein the biopolymer is produced by fermentation of a carbohydrate source by the action of bacteria or fungi which is an excellular polysaccharide having a molecular weight in excess of about 500,000, and from about 0.05 ppb to about 5 ppb of a low shear rate viscosity increasing additive selected from the group consisting of citric acid, alkali metal salts of citric acid, ammonium citrate, and mixtures thereof.
2. The fluid of claim 1 wherein the biopolymer is xanthan gum.
3. The fluid of claim 1 further comprising a polymeric fluid loss control additive selected from the group consisting of pregelatinized starch, starch derivatives, cellulose derivatives, and mixtures thereof.
4. The fluid of claim 3 wherein the polymeric fluid loss control additive is a starch derivative selected form the group consisting of hydroxyethyl starch, hydroxypropyl starch, hydroxyalkyl carboxymethyl starch, carboxymethyl starch, tertiary aminoalkyl ether derivatives of starch, and the slightly crosslinked derivatives of such derivatized starches, and mixtures thereof.
5. The fluid of claim 3 wherein the polymeric fluid loss control additive is a hydroxypropyl ether derivative of starch which has been slightly crosslinked with epichlorohydrin.
6. The fluid of claim 3 wherein the polymeric fluid loss control additive is selected from the group consisting of (1) a crosslinked ether derivative of a partially hydrolyzed starch, (2) a partially depolymerized, crosslinked ether derivative of starch, and (3) mixtures thereof.
7. The fluid of claim 6 wherein the water soluble polymer biopolymer is xanthan gum.
8. The fluid of claim 7 wherein the ether derivative is a hydroxypropyl ether.
9. The process of drilling a well wherein the fluid of claim 1 is circulated within a borehole being drilled as drilling proceeds.
10. The process of drilling a well wherein the fluid of claim 2 is circulated within a borehole being drilled as drilling proceeds.
11. The process of drilling a well wherein the fluid of claim 3 is circulated within a borehole being drilled as drilling proceeds.
12. The process of drilling a well wherein the fluid of claim 4 is circulated within a borehole being drilled as drilling proceeds.
13. The process of drilling a well wherein the fluid of claim 5 is circulated within a borehole being drilled as drilling proceeds.
14. The process of drilling a well wherein the fluid of claim 6 is circulated within a borehole being drilled as drilling proceeds.
15. The process of drilling a well wherein the fluid of claim 7 is circulated within a borehole being drilled as drilling proceeds.
16. The process of drilling a well wherein the fluid of claim 8 is circulated within a borehole being drilled as drilling proceeds.
17. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 1.
18. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 2.
19. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 3.
20. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 4.
21. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 5.
22. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 6.
23. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 7.
24. The process of completing or working over a well wherein a subterranean formation is contacted with the fluid of claim 8.
25. A method of increasing the low shear rate viscosity of a well drilling and servicing fluid which comprises adding to the fluid from about 0.05 ppb to about 5 ppb of a low shear rate viscosity increasing additive selected from the group consisting of citric acid, alkali metal salts of citric acid, animonium citrate, and mixtures thereof, wherein the fluid comprises an aqueous liquid a biopolymer viscosifler, a particulate magnesia bridging agent wherein the magnesia has an Activity Index greater than about 800 seconds, and wherein the biopolymer is produced by fermentation of a carbohydrate source by the action of bacteria or fungi which is an excellular polysaccharide having a molecular weight in excess of about 500,000.
26. The fluid of claim 25 wherein the biopolymer is xanthan gum.
27. The method of claim 25 further comprising a polymeric fluid loss control additive selected from the group consisting of pregelatinized starch, starch derivatives, cellulose derivatives, and mixtures thereof.
28. The method of claim 27 wherein the polymeric fluid loss control additive is a starch derivative selected form the group consisting of hydroxyethyl starch, hydroxypropyl starch, hydroxyalkyl carboxymethyl starch, carboxymethyl starch, tertiary aininoalkyl ether derivatives of starch, and the slightly crosslinked derivatives of such derivatized starches, and mixtures thereof.
29. The method of claim 27 wherein the polymeric fluid loss control additive is a hydroxypropyl ether derivative of starch which has been slightly crosslinked with epichlorohydrin.
30. The method of claim 27 wherein the polymeric fluid loss control additive is selected from the group consisting of (1) a crosslinked ether derivative of a partially hydrolyzed starch, (2) a partially depolymerized, crosslinked ether derivative of starch, and (3) mixtures thereof.
31. The method of claim 30 wherein the biopolymer is xanthan gum.
32. The method of claim 31 wherein the ether derivative is a hydroxypropyl ether.