Handling rods, casings, tubes or the like outside the borehole

EFIXED CONSTRUCTIONS E21Mining E21BEARTH DRILLING

E21B19/00Handling rods, casings, tubes or the like outside the borehole

E21B19/002specially adapted for underwater drilling E21B19/004supporting a riser from a drilling or production platform E21B19/006including heave compensators E21B19/008Winding units, specially adapted for drilling operations E21B19/02Rod or cable suspensions E21B19/04Hooks E21B19/06Elevators E21B19/07Slip-type elevators E21B19/08Apparatus for feeding the rods or cables Apparatus for increasing or decreasing the pressure on the drilling tool Apparatus for counterbalancing the weight of the rods E21B19/081Screw-and-nut feed mechanisms E21B19/083Cam, rack or like feed mechanisms E21B19/084with flexible drawing means E21B19/086with a fluid-actuated cylinder E21B19/087by means of a swinging arm E21B19/089with a spring or an additional weight E21B19/09specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string E21B19/10Slips Spiders; Catching devices E21B19/12Rope clamps rod, casings or tube clamps not secured to elevators E21B19/14Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected Handling between storage place and borehole E21B19/143specially adapted for underwater drilling E21B19/146Carousel systems E21B19/15Racking of rods in horizontal position Handling between horizontal and vertical position E21B19/155Handling between horizontal and vertical position E21B19/16Connecting or disconnecting pipe couplings or joints E21B19/161using a wrench or a spinner adapted to engage a circular section of pipe E21B19/162cathead actuated E21B19/163piston-cylinder actuated E21B19/164motor actuated E21B19/165Control or monitoring arrangements therefor E21B19/166Arrangements of torque limiters or torque indicators E21B19/167using a wrench adapted to engage a non circular section of pipe E21B19/168using a spinner with rollers or a belt adapted to engage a well pipe E21B19/18Connecting or disconnecting drill bit and drilling pipe E21B19/20Combined feeding from rack and connecting E21B19/22Handling reeled pipe or rod units E21B19/24Guiding or centralising devices for drilling rods or pipes