Oil field rig mat assembly

An oil field mat assembly having a pair of interlocking full mats connected by interlocking half mats, wherein each full mat comprises:

• a) a bottom layer comprising:
• (i) a bottom layer orientation;
• (ii) a plurality of bottom layer boards connected in parallel to each other, wherein each board has an identical board width;
• and
• (iii) a first bottom layer side, a second bottom layer side opposite the first bottom layer side, a third bottom layer side, and a fourth bottom layer side opposite the third bottom layer side between the first and second bottom layer sides;
• b) a bottom interlocking segment formed on the bottom layer comprising:
• (i) a interlocking segment centerline passing from the first bottom layer side to the second bottom layer side;
• (ii) a first half aligned locking board mounted adjacent the first bottom layer side and adjacent the interlocking segment centerline and configured to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat;
• (iii) a second half aligned locking board mounted flush with the second bottom layer side and adjacent the interlocking segment center line to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat;
• (iv) a first full aligned locking board spaced apart from and mounted between the first and second half aligned locking boards, wherein the first full aligned locking board is mounted adjacent the interlocking segment centerline and configured to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat, and wherein the first and second half aligned locking boards and the first full aligned locking board are positioned on identical sides of the interlocking segment centerline;
• (v) a second full aligned locking board mounted between the first half aligned locking board and the first full aligned locking board and mounted adjacent to the interlocking segment centerline and configured to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat, wherein the second full aligned locking board is spaced from 1.5 to 2 board widths from the first bottom layer side;
• and
• (vi) a third full aligned locking board mounted between the first full aligned locking board and the second half aligned locking board to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat, wherein the third full aligned locking board is spaced from 1.5 to 2 board widths from the second bottom layer side, and wherein the second and third full aligned locking boards are positioned on identical sides of the interlocking segment centerline;
• c) a middle layer formed from a plurality of middle layer boards forming a middle layer orientation at a right angle to the bottom layer orientation;
• d) an alignment control means to maintain a preset geometric shape, wherein the alignment control means is disposed between the middle layer and the bottom layer;
• e) a top layer comprising a plurality of top beveled boards forming a top layer orientation at a right angle to the middle layer orientation;
• f) a top interlocking segment formed on the top layer on the same side that the top layer connects to the middle layer, wherein the top interlocking segment comprises:
• (i) a top interlocking segment centerline;
• (ii) a first top half aligned locking board mounted adjacent the first top layer side and adjacent the top interlocking segment centerline and configured to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat;
• (iii) a second top half aligned locking board mounted adjacent to the second top layer side and adjacent to the top interlocking segment center line to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat;
• (iv) a first top full aligned locking board spaced apart from and mounted between the first and second top half aligned locking boards, wherein the first top full aligned locking board is mounted adjacent to the top interlocking segment centerline and configured to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat, and wherein the first and second top half aligned locking boards and the first top full aligned locking board are positioned on identical sides of the top interlocking segment centerline;
• (v) a second top full aligned locking board mounted between the first top half aligned locking board and the first top full aligned locking board and mounted adjacent the top interlocking segment centerline and configured to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat, wherein the second top full aligned locking board is spaced from 1.5 to 2 board widths from the first top layer side;
• and
• (vi) a third top full aligned locking board mounted between the first top full aligned locking board and the second top half aligned locking board to prevent lateral and longitudinal movement of either an additional interlocking full mat or an additional interlocking half mat, wherein the third top full aligned locking board is spaced from 1.5 to 2 board widths from the second top layer side, and wherein the second and third full aligned locking boards are positioned on identical sides of the top interlocking segment centerline;
• and
• g) an anti-curling bar to prevent curling by the top layer mounted between the middle layer and the top layer connecting across all of the boards of the top layer and the middle layer.