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A ram type blowout preventer includes variable ram packers for sealing about tubulars of different outside diameters in the bore of the preventer housing or about a single tubular having a variable outside diameter. Each ram packer includes a body of elastomeric material formed about vertical ribs t

A ram type blowout preventer includes variable ram packers for sealing about tubulars of different outside diameters in the bore of the preventer housing or about a single tubular having a variable outside diameter. Each ram packer includes a body of elastomeric material formed about vertical ribs to conform to tubular having variable OD within a certain range.

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1. A variable bore ram packer comprising:a. an upper plate;b. a lower plate;c. plurality of wedge-shaped segments between the upper and lower plates, where each of the plurality of wedge-shaped segments comprises:i. a top pie-shaped section;ii. a bottom pie-shaped section having a non-circular rib r

1. A variable bore ram packer comprising:a. an upper plate;b. a lower plate;c. plurality of wedge-shaped segments between the upper and lower plates, where each of the plurality of wedge-shaped segments comprises:i. a top pie-shaped section;ii. a bottom pie-shaped section having a non-circular rib recieving recess therein; andiii. a rib between the top and bottom pie-shaped sections, the rib defining a non-circular cross section of a size and shape to slidingly engage the recess in the bottom pie-shaped section; andd. an elastomeric material supported by the wedge-shaped segments.2. The packer of claim 1, wherein the elastomeric material fills in between the top and bottom pie-shaped sections and around the rib.3. The packer of claim 1, wherein the top section includes a straight edge with a step therealong, adapted to mate with a complementary step along a straight edge of an adjacent top section.4. The packer of claim 1, wherein the bottom section includes a straight edge with a step therealong, adapted to mate with a similar step along a straight edge of an adjacent bottom section.5. The packer of claim 1, wherein the top section defines an undersurface and further comprising a groove in the undersurface to receive the rib.6. The packer of claim 1, further comprising:a. an upper pin extending from the top section;b. a bottom pin extending from the bottom section;c. a recess in the upper plate to receive the upper pin; andd. a recess in the lower plate to receive the bottom pin.7. A variable bore ram packer comprising:a. an upper plate;b. a lower plate;c. plurality of wedge-shaped segments between the upper and lower plates, wherein each of the plurality of wedge-shaped segments comprises:i. a top pie-shaped section having a non-circular rib-recieving recess therein;ii. a bottom pie-shaped section; anda rib between the top and bottom pie-shaped sections, the rib defining a non-circular cross section of a size and shape to slidingly engage the recess in the top pie-shaped section; andd. an elastomeric material supported by the wedge-shaped segments.