US4098516A — Blowout preventer packing unit with slanted reinf…

Claim 1

Independent Claim 101 words

In an annular blowout preventer packing unit having a longitudinal axis, the packing unit adapted to be compressively displaced inwardly toward said axis the improvement combination comprising (a) metallic inserts generally circularly spaced about said axis, the inserts having webs that extend both longitudinally and in directions about said axis to define surfaces which have longitudinally facing extents, (b) an annulus of elastomeric material extending about said axis and embedding said webs, the material extending in contacting relation with said surface extents so that the webs anchor the material and resist longitudinal displacement thereof during said compressive displacement of the packer.

Claim 2

Dependent Claim 101 words

In an annular blowout preventer packing unit having a longitudinal axis, the packing unit adapted to be compressively displaced inwardly toward said axis the improvement combination comprising (a) metallic inserts generally circularly spaced about said axis, the inserts having webs that extend both longitudinally and in directions about said axis to define surfaces which have longitudinally facing extents, (b) an annulus of elastomeric material extending about said axis and embedding said webs, the material extending in contacting relation with said surface extents so that the webs anchor the material and resist longitudinal displacement thereof during said compressive displacement of the packer.

Claim 3

Dependent Claim 21 words

The improvement combination of claim 1 wherein certain of said webs have upper and lower portions with oppositely directed curvatures, respectively.

Claim 4

Dependent Claim 34 words

The improvement combination of claim 1 wherein each of said webs has an upper portion which is concave in one direction about said axis and a lower portion which is convex in said direction.

Claim 5

Dependent Claim 28 words

The improvement combination of claim 1 wherein each of said webs has upper and lower portions, there being a region of inflection between said upper and lower portions.

Claim 6

Dependent Claim 32 words

The improvement combination of claim 1 wherein each insert has an upper plate and a lower plate, the lower plate offset relative to the upper plate, and in direction about said axis.

Claim 7

Dependent Claim 46 words

The improvement combination of claim 4 wherein each insert has an upper plate and a lower plate between which said upper and lower web portions with different angularities are located, the lower plate offset relative to the upper plate, and in a direction about said axis.

Claim 8

Dependent Claim 17 words

The improvement combination of claim 5 wherein the web portions are elongated generally radially toward said axis.

Claim 9

Dependent Claim 34 words

The improvement combination of claim 6 wherein the web portions are laterally elongated toward an inner region about said axis, said portions being further characterized by increasing skew angularity along the axial lengths thereof.

Claim 10

Dependent Claim 19 words

The improvement combination of claim 6 wherein the web portions are generally laterally elongated, and in generally parallel directions.

Claim 11

Dependent Claim 21 words

The improvement combination of claim 1 wherein successive of said webs have nested relationship when the packer is displaced radially inwardly.

Claim 12

Dependent Claim 21 words

The improvement combination of claim 6 wherein successive of said webs have nested relationship when the packer is displaced radially inwardly.

Claim 13

Dependent Claim 46 words

The improvement combination of claim 6 wherein the upper plate is elongated in a first direction toward said axis, and the lower plate is elongated in a second direction toward an inner region about said axis, said second direction angularly skewed, relative to said first direction.

Claim 14

Dependent Claim 19 words

The improvement combination of claim 12 wherein said inserts are inwardly displaced when the packer is compressively displaced inwardly.

Claim 15

Dependent Claim 23 words

The improvement combination of claim 13 wherein said lower plates, when displaced inwardly, have positions wherein they are elongated generally toward said axis.

Claim 16

Dependent Claim 37 words

The improvement combination of claim 6 wherein said elastomeric material forms inwardly protruding folds when the packer is compressively displaced radially inwardly, said folds having angularity which corresponds to that of said web upper and lower portions.

Claim 17

Dependent Claim 78 words

Metallic inserts usable in an annular blowout preventer packer unit having a longitudinal axis, the packer unit comprising an elastomeric body carrying the inserts and adapted to be compressively displaced inwardly toward said axis, each of said inserts comprising (a) top and bottom ends and a web extending therebetween, (b) said web extending both longitudinally and in a direction about said axis to define surfaces to receive generally axial loading transmitted by the body during said compressive displacement.

Claim 18

Dependent Claim 78 words

Metallic inserts usable in an annular blowout preventer packer unit having a longitudinal axis, the packer unit comprising an elastomeric body carrying the inserts and adapted to be compressively displaced inwardly toward said axis, each of said inserts comprising (a) top and bottom ends and a web extending therebetween, (b) said web extending both longitudinally and in a direction about said axis to define surfaces to receive generally axial loading transmitted by the body during said compressive displacement.

Claim 19

Dependent Claim 18 words

The insert of claim 16 wherein said web has upper and lower portions with oppositely directed curvatures, respectively.

Claim 20

Dependent Claim 31 words

The insert of claim 16 wherein said web has an upper portion which is concave in one direction about said axis, and a lower portion which is convex in said direction.

Claim 21

Dependent Claim 29 words

The insert of claim 16 wherein the web has upper and lower portions with different curvatures, respectively, there being a region of inflection between said upper and lower portions.

Claim 22

Dependent Claim 33 words

The improvement combination of claim 15 wherein the insert has an upper plate and a lower plate, the lower plate offset relative to the upper plate, and in a direction about said axis.

Claim 23

Dependent Claim 46 words

The improvement combination of claim 19 wherein the insert has an upper plate and a lower plate between which said upper and lower web portions with different curvatures are located, the lower plate offset relative to the upper plate, and in a direction about said axis.

Claim 24

Dependent Claim 17 words

The improvement combination of claim 20 wherein the web portions are elongated generally radially toward said axis.

Claim 25

Dependent Claim 33 words

The improvement combination of claim 21 wherein the web portions are elongated toward an inner region about said axis, said portions being further characterized by increasing skew angularity along the axial lengths thereof.

Claim 26

Dependent Claim 46 words

The improvement combination of claim 21 wherein the upper plate is elongated in a first direction toward said axis, and the lower plate is elongated in a second direction toward an inner region about said axis, said second direction angularly skewed, relative to said first direction.

Claim 27

Dependent Claim 19 words

The improvement combination of claim 22 wherein the web portions are generally laterally elongated, and in generally parallel relation.

Claim 28

Dependent Claim 33 words

The improvement combination of claim 1 wherein each insert has an upper plate and a lower plate between which a web extends, the web locally protruding sidewardly in a direction about said axis.

Claim 29

Dependent Claim 20 words

The improvement combination of claim 26 wherein the protruding web bulges sidewardly, the upper and lower plates generally vertically aligned.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-07-03	1982-01-02	1982-07-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-07-03	1986-01-02	1986-07-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-07-03	1990-01-02	1990-07-04	$7700.00	Window Closed / Lapsed

Blowout preventer packing unit with slanted reinforcing inserts

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