Rotating and reciprocating swivel apparatus and method

摘要

What is provided is a method and apparatus wherein a swivel can be detachably connected to an annular blowout preventer thereby separating the drilling fluid or mud into upper and lower sections and allowing the fluid to be displaced in two stages, such as while the drill string is being rotated and/or reciprocated. In one embodiment the sleeve or housing can be rotatably and sealably connected to a mandrel. The swivel can be incorporated into a drill or well string and enabling string sections both above and below the sleeve to be rotated in relation to the sleeve. In one embodiment the drill or well string does not move in a longitudinal direction relative to the swivel. In one embodiment, the drill or well string does move longitudinally relative to the sleeve or housing of the swivel.

主权项

1. A method of using a reciprocating swivel in a drill or work string, the method comprising the following steps:
(a) lowering a rotating and reciprocating tool to an annular BOP, the tool comprising a mandrel and a sleeve, the sleeve being reciprocable relative to the mandrel and the swivel including a quick lock/quick unlock system which has locked and unlocked states, the swivel including an interstitial space between the sleeve and the mandrel, the interstitial space having a interstitial pressure relief mode and non-pressure relief modes, the swivel being reversably switchable between pressure relief and non-pressure relief modes; (b) after step “a”, having the annular BOP close on the sleeve; (c) causing relative longitudinal movement between the sleeve and the mandrel and causing the quick lock/quick unlock system to enter an unlocked state; (d) after step “c”, moving the sleeve outside of the annular BOP; (e) after step “d”, moving the sleeve inside of the annular BOP and having the annular BOP close on the sleeve; and (f) after step “e”, causing relative longitudinal movement between the sleeve and the mandrel and activating the quick lock/quick unlock system.