Portable tool for refacing drill pipe

Claim 2

Lightweight, portable apparatus suitable for field use to reface desired surfaces of a pipe member comprising: a housing adapted to receive said pipe member in a manner such that the longitudinal axis of said pipe member is coincident with the longitudinal axis of said housing; a rotatable cutting head mounted on said housing, in a manner such that said cutting head is movable longitudinally along said axes with said housing but is rotatable about said axes independent of said housing; at least one cutting tool mounted on said cutting head in a manner such that the desired surfaces of said pipe member may be refaced as said cutting tool rotates about said axes on said cutting head; means including a threaded section adapted to mate with the threads of said pipe member, said section being carried on a slide member extending along said axes and having at least two longitudinally extending slots therein, and a hollow central portion along said axes, for detachably securing said apparatus to said pipe member; a feed screw disposed in said hollow central portion and connected with pins extending through said slots, rotating of said feed screw being effective to move said housing and said cutting head axially but such rotation not causing movement of said slide and threaded section; and, means on said housing for rotating said cutting head.

Claim 3

Lightweight, portable apparatus suitable for field use to reface desired surfaces of a pipe member comprising: a housing adapted to receive said pipe member in a manner such that the longitudinal axis of said pipe member is coincident with the longitudinal axis of said housing; a rotatable cutting head mounted on said housing, in a manner such that said cutting head is movable longitudinally along said axes with said housing but is rotatable about said axes independent of said housing; at least one cutting tool mounted on said cutting head in a manner such that the desired surfaces of said pipe member may be refaced as said cutting tool rotates about said axes on said cutting head; means including a threaded section adapted to mate with the threads of said pipe member, said section being carried on a slide member extending along said axes and having at least two longitudinally extending slots therein, and a hollow central portion along said axes, for detachably securing said apparatus to said pipe member; a feed screw disposed in said hollow central portion and connected with pins extending through said slots, rotating of said feed screw being effective to move said housing and said cutting head axially but such rotation not causing movement of said slide and threaded section; and, means on said housing for rotating said cutting head.

Claim 4

Lightweight, portable apparatus suitable for field use to reface desired surfaces of a pipe member comprising: a housing adapted to receive said pipe member in a manner such that the longitudinal axis of said pipe member is coincident with the longitudinal axis of said housing; a rotatable cutting head mounted on said housing, in a manner such that said cutting head is movable longitudinally along said axes with said housing but is rotatable about said axes independent of said housing; at least one cutting tool mounted on said cutting head in a manner such that the desired surfaces of said pipe member may be refaced as said cutting tool rotates about said axes on said cutting head; means including a threaded section adapted to mate with the threads of said pipe member, said section being carried on a slide member extending along said axes and having at least two longitudinally extending slots therein, and a hollow central portion along said axes, for detachably securing said apparatus to said pipe member; a feed screw disposed in said hollow central portion and connected with pins extending through said slots, rotating of said feed screw being effective to move said housing and said cutting head axially but such rotation not causing movement of said slide and threaded section; and, means on said housing for rotating said cutting head.

Claim 5

Apparatus in accordance with claim 1, said slide member being connected to a handle at the end thereof opposite said pipe member, and said handle being operable upon turning to rotate said engagement with said pipe member.

Claim 6

Apparatus in accordance with claim 1, wherein said cutting tool includes a cutting element which has plural surfaces adapted for cutting the desired surface, and wherein said element is detachably mounted on said cutting head in a manner such that the element may be readily and easily turned to present a different face as a cutting surface after one such surface becomes dulled in operation.

Claim 7

Apparatus in accordance with claim 3, wherein said cutting element is a thin flat member in the shape of an equilateral polygon, said cutting element being readily detachably mounted against a support surface on said cutting tool.

Claim 8

Apparatus in accordance with claim 4, wherein said cutting tool comprises a base and an upstanding portion, said upstanding portion presenting said support surface, and said base being secured to said cutting head by fastening means therein, said fastening means extending through elongate slots in said base in a manner such that said cutting tool may be readily adjusted to move said cutting surface toward or away from said pipe member.

Claim 9

Apparatus in accordance with claim 1, wherein said means for rotating said cutting head comprises a ring gear, said housing including teeth for meshing with said ring gear.

Claim 10

Lightweight, portable apparatus suitable for field use to reface desired surfaces of a pipe member comprising: a housing adapted to receive said pipe member in a manner such that the longitudinal axis of said pipe member is coincident with the longitudinal axis of said housing, said housing including roller bearings mounted concentrically around said axes; a rotatable cutting head mounted on said roller bearings such that said cutting head is movable longitudinally along said axes with said housing but is rotatable about said axes independent of said housing; at least one cutting tool mounted on said cutting head in a manner such that the desired surfaces of said pipe member may be refaced as said cutting tool rotates about said axes on said cutting head; means including a threaded tubular section adapted to mate with the threads of said pipe member, said section being carried on a slide member extending along said axes and having at least two longitudinally extending slots therein, and a hollow central portion along said axes, and a handle at the end of said slide member opposite said threaded section, said handle being operable upon turning to rotate said housing and to move said threaded section into mating threaded engagement with said pipe member; for detachably securing said apparatus to said pipe member; a feed screw disposed in said hollow central portion and connected with pins extending through said slots, rotating of said feed screw being effective to move said housing and said cutting head axially but such rotation not causing movement of said slide and threaded section; and, means on said housing for rotating said cutting head.

Claim 11

Lightweight, portable apparatus suitable for field use to reface desired surfaces of a pipe member comprising: a housing adapted to receive said pipe member in a manner such that the longitudinal axis of said pipe member is coincident with the longitudinal axis of said housing, said housing including roller bearings mounted concentrically around said axes; a rotatable cutting head mounted on said roller bearings such that said cutting head is movable longitudinally along said axes with said housing but is rotatable about said axes independent of said housing; at least one cutting tool mounted on said cutting head in a manner such that the desired surfaces of said pipe member may be refaced as said cutting tool rotates about said axes on said cutting head; means including a threaded tubular section adapted to mate with the threads of said pipe member, said section being carried on a slide member extending along said axes and having at least two longitudinally extending slots therein, and a hollow central portion along said axes, and a handle at the end of said slide member opposite said threaded section, said handle being operable upon turning to rotate said housing and to move said threaded section into mating threaded engagement with said pipe member; for detachably securing said apparatus to said pipe member; a feed screw disposed in said hollow central portion and connected with pins extending through said slots, rotating of said feed screw being effective to move said housing and said cutting head axially but such rotation not causing movement of said slide and threaded section; and, means on said housing for rotating said cutting head.

Claim 12

Apparatus in accordance with claim 7, wherein said cutting tool includes a cutting element which has plural surfaces adapted for cutting the desired surface, and wherein said element is detachably mounted on said cutting head in a manner such that the element may be readily and easily turned to present a different face as a cutting surface after one such surface becomes dulled in operation.

Claim 13

Apparatus in accordance with claim 8, wherein said cutting element is a thin flat member in the shape of an equilateral polygon, said cutting element being readily detachably mounted against a support surface on said cutting tool.

Claim 14

Apparatus in accordance with claim 9, wherein said cutting tool comprises a base and an upstanding portion, said upstanding portion presenting said support surface, and said base being secured to said cutting head by fastening means therein, said fastening means extending through elongate slots in said base in a manner such that said cutting tool may be readily adjusted to move said cutting surface toward or away from said pipe member.