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A pothead connector for an electrical submersible pump motor includes a housing. A first insulating block is disposed within the housing and has passages for receiving insulated conductors of the power cable. The passages in the first insulating block have counterbores on an second end. A second ins

A pothead connector for an electrical submersible pump motor includes a housing. A first insulating block is disposed within the housing and has passages for receiving insulated conductors of the power cable. The passages in the first insulating block have counterbores on an second end. A second insulating block is also disposed within the housing. The second insulating block has passages through which the insulated conductors pass. The second insulating block also has protrusions on a first face that are concentric with the counterbores and shaped to fit within the counterbores in the first insulating block. An elastomeric washer is positioned within each of the counterbores. A fastener rigidly secures the second insulating block to the first insulating block, forcing the protrusions against the elastomeric washers to cause the washers to seal around the insulated conductors.

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A pothead connector for an electrical submersible pump motor includes a housing. A first insulating block is disposed within the housing and has passages for receiving insulated conductors of the power cable. The passages in the first insulating block have counterbores on an second end. A second ins

A pothead connector for an electrical submersible pump motor includes a housing. A first insulating block is disposed within the housing and has passages for receiving insulated conductors of the power cable. The passages in the first insulating block have counterbores on an second end. A second insulating block is also disposed within the housing. The second insulating block has passages through which the insulated conductors pass. The second insulating block also has protrusions on a first face that are concentric with the counterbores and shaped to fit within the counterbores in the first insulating block. An elastomeric washer is positioned within each of the counterbores. A fastener rigidly secures the second insulating block to the first insulating block, forcing the protrusions against the elastomeric washers to cause the washers to seal around the insulated conductors. the first procedure being an initial shape for the second procedure. 3. A method according to claim 1 or claim 2, wherein an image is produced to simulate the performance of the steps of the sequence. 4. A method according to claim 1, or claim 2, wherein the sequence of machining steps is used to create a tool path by which the steps may be executed. 5. A method according to claim 4, wherein the identification of a sequence of machining steps is dependent upon tool size, tool type, the number of cuts to the used to create the envelope shape, or a maximum depth of cut. 6. A method according to claim 4, wherein at least one image is produced to simulate the toolpath for consideration prior to machining commencing. 7. A method according to claim 2, wherein the second procedure is repeatedly applied to a single workpiece, the initial shape for subsequent cycles being an envelope shape produced by the machine sequence of the previous cycle. 8. A method according to claim 1 or claim 2, wherein the envelope shape is three dimensional, surrounding at least part of the workpiece. 9. A method according to claim 8, wherein the envelope shape has at least one planar face. 10. A method according to claim 8, wherein the envelope shape consists entirely of planar faces. 11. A method according to claim 8, wherein the envelope shape is a prism surrounding at least part of the length of the workpiece and having a constant polygonal cross section along an axis. 12. A method according to claim 1 or claim 2, wherein the envelope shape is chosen to optimize the fit of the final shape within the envelope shape by minimizing the volume of the envelope or the surface area of the envelope. 13. A method according to claim 12, wherein the optimisation includes the location of a planar face of the envelope shape against a generally planar surface of the final shape. 14. A computer-readable medium encoded with a program for machining a workpiece, said program comprising: identifying an initial shape of at least one part of the workpiece; identifying a final shape required for the at least one part of the workpiece: generating an envelope shape, the envelope shape, wholly containing the final shape and being wholly contained within the initial shape of the at least one part of the workpiece; and identifying a sequence of machining steps to form the workpiece from the initial shape to the envelope shape, wherein the identification of each machining step of the sequence of machining steps takes into account the previous machining steps of the sequence of machining steps to minimize tool movement during machining. 15. A method according to claim 1 or claim 2, wherein the machining steps are cuts produced by a flank milling operation, during which the workpiece is turned relative to the tool to produce non linear cutting paths across the workpiece. 16. A computer-readable medium encoded with a program for machining a workpiece, said program comprising: performing a first procedure on a workpiece, the first procedure including identifying an initial shape of at least one part of the workpiece, identifying a final shape required for the at least one part of the workpiece, generating an envelope shape, the envelope shape wholly containing the final shape and being wholly contained within the initial shape of the at least one part of the workpiece, identifying a sequence of machining steps to form the workpiece from the initial shape to the envelope shape, wherein the identification of each machining step of the sequence of machining steps takes into account the previous machining steps of the sequence of machining steps to minimize tool movement during machining; and performing a second procedure on the workpiece, with the second procedure being the same as the first procedure, and with the envelope shape of the first procedure being an initial shape for the second procedure. 17. An apparatus for machining a workpiece, the apparatus compri