extend and pivot derrick 40 to selectively place derrick 40 in a working position fig1 and in a lowered position fig5 in the working position derrick 40 is pointed upward but its longitudinal centerline 54 is angularly offset from vertical as indicated by angle 56 the angular offset provides block 38 access to a well bore 58 without interference with derrick pivot point 60 with angular offset 56 the derrick framework does not interfere with the typically rapid installation and removal of numerous inner pipe segments known as an inner pipe string 62 and sucker rods 64 fig1 individual pipe segments of string 62 and sucker rods 64 are screwed to themselves using hydraulic tongs 66 which are schematically illustrated in fig4 the term 34 hydraulic tongs 34 used herein and below refer to any hydraulic tool that can screw together two pipes or sucker rods an example would include those provided by b j hughes company of houston tex in operation pump 28 drives a hydraulic motor 68 forward and reverse by way of valve 70 conceptually motor 68 drives pinions 72 which turn wrench element 74 relative to clamp 76 element 74 and clamp 76 engage flats 81 on mating couplings 78 of a sucker rod or inner pipe string of one conceived embodiment of the invention however it is well within the scope of the invention to have rotational jaws or grippers that clamp on to a round pipe i e no flats similar in concept.