1. A coiled tubing injector apparatus for inserting and removing coiled tubing from a wellhead, comprising:
a first and second band of opposed gripping members arranged for gripping said coiled tubing in a central pathway;
a first and second inner chain operable to drive said first and second bands;
a first and second skate plate, each of said first and second skate plate defining a channel and a plurality of recesses along both sides of said channel;
a wear plate sized to fit within said channel of each said skate plate, said wear plate further comprising a plurality of openings, wherein said plurality of recesses and said plurality of openings align when said wear plate is inserted into said channel of each said skate plate; and
a plurality of clamps for fastening each said wear plate to each said skate plate, wherein a first end of said plurality of clamps fits within said plurality of recesses and a second end of said plurality of clamps defines a tongue for insertion in said plurality of openings.
2. The apparatus of claim 1, further comprising at least one hydraulic cylinder operable for selectively compressing said first and second band of opposed gripping members.
3. The apparatus of claim 1, wherein said plurality of clamps are secured within said plurality of notches with a plurality of fasteners.
4. The apparatus of claim 1, wherein said plurality of recesses each comprise a rectangular shaped aperture.
5. The apparatus of claim 1 further comprising first and second end plates positioned on each end of said wear plate.
6. The apparatus of claim 5, wherein each of said first and second end plates comprise a curved surface.
7. The apparatus of claim 1, wherein said wear plate is thicker than said channel so as to extend outwardly from each of said first and second skate plates.
8. The apparatus of claim 1, further comprising a first and second center plates positioned on an opposite side from said wear plate for said first and second skate plates.
9. The apparatus of claim 1, wherein said wear plate comprises a center track.
10. A coiled tubing injector apparatus, comprising:
a first injector column comprising a skate plate and a wear plate, said skate plate comprising a central track sized to receive said wear plate and a plurality of indentions along both sides of said central track, said wear plate further comprising a plurality of slots, wherein said plurality of slots and said plurality of indentions align when said wear plate is inserted into said central track of said skate plate;
a second injector column comprising a skate plate and a wear plate, said skate plate comprising a central track sized to receive said wear plate and a plurality of indentions along both sides of said central track; and
a plurality of clamps for fastening said wear plate to said skate plate of both said first injector column and said second injector column, each of said plurality of clamps forming an extension of said wear plate aligning with said plurality of indentions and operable for securing said wear plate in position relative to said skate plate.
11. The apparatus of claim 10, wherein said plurality of clamps each further comprise a tongue for insertion into said plurality of indentions of said skate plate.
12. The apparatus of claim 10, wherein said plurality of clamps are separate from said wear plate and fit within a plurality of slots within said wear plate.
13. The apparatus of claim 10, wherein said coiled tubing injector apparatus is housed within a frame.
14. The apparatus of claim 10 wherein said first and second injector columns further comprise first and second inner chains each further comprising a plurality of rolling elements.
15. The apparatus of claim 10 further comprising a plurality of hydraulic cylinders operable for exerting a compressing force on a plurality of gripping members to remove andor insert a coiled tubing from a central pathway.
16. A method of manufacturing for a coiled tubing injector apparatus, comprising:
providing a first and second outer chain each further comprising a plurality of gripping members revolving around an outer pathway, said first and second outer chains arranged so that a gripping surface of said plurality of gripping members oppose each other with respect to a central pathway;
inserting a first and second inner chain within said outer pathway of said first and second outer chains respectively, wherein said first and second inner chains further comprise a plurality of rolling elements for engaging with a backside of said plurality of gripping members;
assembling a first and second injector head each comprising a plurality of hydraulic cylinders and a skate plate, said first and second injector head providing an axis for said first and second inner chain to revolve around, said skate plate comprising a central channel sized to receive a wear plate and a series of channel indentations along the sides of said central channel, said wear plate further comprising a plurality of recesses, wherein said plurality of recesses and said series of channel indentations align when said wear plate is inserted into said central channel of said skate plate; and
providing a plurality of clamp plates for fastening said wear plate to said skate plate, said plurality of clamp plates mating with said series of channel indentations and overlapping said plurality of recesses whereby forces produced during operations of said coiled tubing injector apparatus are distributed between said wear plate and said skate plate.
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 process for the production of a contact lens, comprising polymerizing andor crosslinking a starting material in a mold to form the contact lens, wherein the starting material is polymerizable andor crosslinkable by means of UV radiation, wherein the mold has a first mold half having a first optical surface in contact with the starting material and a second mold half having a second optical surface in contact with starting material, wherein said first mold half and said second mold half are configured to receive each other such that the cavity is formed between said first optical surface and said second optical surface, wherein at least one of the first and second mold halves comprises a polymer having a very low oxygen permeability characterized by being less than
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so that oxygen is prevented from reaching the first andor second optical surfaces during polymerizing andor crosslinking process and that inhibition of polymerizing andor crosslinking of the starting material at starting materialoptical surface interface is substantially minimized or eliminated, wherein the at least one of the first and second mold halves comprises UV absorbers distributed in the polymer, and wherein the polymer is selected from the group consisting of methamethacrylateacrylonitrilebutadienestyrene copolymer, methacrylateacrylonitrile copolymer, cyclic olefin copolymers, and diallyl diglycol carbonate polymer.
2. A process according to claim 1, wherein the first mold half comprises the polymer having an oxygen permeability of less than
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3. A process according to claim 1, wherein both the first and second mold halves comprise the polymer having an oxygen permeability of less than
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4. A process according to claim 3, wherein both of the first and second mold halves comprise UV absorbers distributed in the polymer.
5. A process according to claim 2, wherein the polymer is cyclic olefin copolymers.
6. A process according to claim 5, wherein the first mold half is a male mold half.
7. A process according to claim 5, wherein the first mold half is a female mold half.
8. A process for producing a contact lens, comprising exposing a starting material for producing the contact lens present in a mold to UV radiation to polymerize andor crosslink the starting material;
wherein the mold comprises a first mold half and a second mold half, wherein the first mold half and second mold half are configured to receive each other such that a cavity is formed between the first mold half and second mold half, wherein only the first mold half comprises a polymer having an oxygen permeability less than
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wherein the polymer comprises a polymer derived from norbornene, and wherein the polymer of the first mold half comprises UV absorbers.
9. The process of claim 8, wherein the first mold half is a concave female mold and the second mold half is a convex male mold.
10. The process of claim 9, wherein the first mold half is composed of a co-polymer of ethylene and norbornene.
11. The process of claim 8, wherein the first mold half is a concave female mold having a first surface and the second mold half is a convex male mold having a second surface, wherein (1) the first mold half is filled with starting material and (2) the second mold half is placed on the first mold half to close the mold, wherein the starting material is in contact with the first surface of the first mold half and the second surface of the second mold half.
12. The process of claim 8, wherein the energy source comprises light having a wavelength greater than 280 nm.
13. The process of claim 8, wherein the first mold half is concave female mold having a first surface and the second mold half is a convex male mold having a second surface, wherein (1) the first mold half is filled with starting material and (2) the second mold half is placed on the first mold half to close the mold, wherein the starting material is in contact with the first surface of the first mold half and the second surface of the second mold half, wherein only the first mold half comprises a polymer having an oxygen permeability less than
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wherein the polymer comprises a polymer derived from norbornene, and wherein the starting material is exposed to light having a wavelength greater than 280 nm.
14. A process for producing a contact lens, comprising exposing a starting material for producing the contact lens present in a mold to UV radiation to polymerize andor crosslink the starting material;
wherein, the mold comprises a first mold half having a first optical surface in contact with the lens material and a second mold half having a second optical surface in contact with lens material, wherein said first mold half and said second mold half are configured to receive each other such that a cavity is formed between said first optical surface and said second optical surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens material is polymerizable andor crosslinkable by UV energy, wherein at least one of the mold halves is made from a mold material comprising a polymer selected from the group consisting of methamethacrylateacrylonitrilebutadienestyrene copolymer, methacrylateacrylonitrile copolymer, cyclic olefin copolymers, chemically crosslinked polymer consisting of allyl diglycol carbonate monomer, wherein the polymer of the at least one mold half comprises UV absorbers, wherein the polymer has a very low oxygen permeability characterized by a value of less than
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so as to be capable of substantially minimizing andor eliminating inhibition of polymerizing andor crosslinking of the lens material at interface between the lens material and the first or second optical surface by preventing oxygen from reaching the first or second optical surface during polymerizing andor crosslinking process.
15. The process according to claim 14, wherein the first mold half comprises the polymer having an oxygen permeability of less than
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16. The process according to claim 14, wherein both the first and second mold halves comprise the polymer having an oxygen permeability of less than
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17. The process according to claim 14, wherein the polymer is a cyclic olefin copolymers.
18. The process according to claim 17, wherein the first mold half is a male mold half.
19. The process according to claim 17, wherein the first mold half is a female mold half.