Rotating and reciprocating swivel apparatus and method with threaded end caps
First Claim
Patent Images
1. A marine oil and gas well drilling apparatus comprising:
- (a) a marine drilling platform;
(b) a drill string that extends between the marine drilling platform and a formation to be drilled, the drill string having a flow bore;
(c) a mandrel having upper and lower end sections and connected to and rotatable with upper and lower sections of the drill string, the mandrel having an external diameter and including a longitudinal passage forming a continuation of a flow bore of the drill string sections;
(d) a sleeve having a longitudinal sleeve passage and an internal diameter, the sleeve being rotatably connected to the mandrel;
(e) an interstitial space between the internal diameter of the sleeve and the external diameter of the mandrel;
(f) wherein the sleeve has a pair of spaced apart end caps which are threadably connected to the sleeve.
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Accused Products
Abstract
What is provided is a method and apparatus wherein a swivel can be detachably connected to an annular blowout preventer 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.
114 Citations
16 Claims
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1. A marine oil and gas well drilling apparatus comprising:
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(a) a marine drilling platform; (b) a drill string that extends between the marine drilling platform and a formation to be drilled, the drill string having a flow bore; (c) a mandrel having upper and lower end sections and connected to and rotatable with upper and lower sections of the drill string, the mandrel having an external diameter and including a longitudinal passage forming a continuation of a flow bore of the drill string sections; (d) a sleeve having a longitudinal sleeve passage and an internal diameter, the sleeve being rotatably connected to the mandrel; (e) an interstitial space between the internal diameter of the sleeve and the external diameter of the mandrel; (f) wherein the sleeve has a pair of spaced apart end caps which are threadably connected to the sleeve. - View Dependent Claims (2, 3)
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4. A method of using a reciprocating swivel in a drill or work string, the method comprising the following steps:
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(a) lowering a rotating and reciprocating tool to an annular BOP, the tool comprising a mandrel and a sleeve, the sleeve has a pair of spaced apart end caps which are threadably connected to the 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; (b) after step “
a”
, having the annular BOP close on the sleeve;(c) after step “
b”
, while the annular BOP is closed on the sleeve, 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”
, while the annular BOP is closed on the sleeve, performing frac operations below the annular BOP;(e) after step “
d”
, while the annular BOP is closed on the sleeve, causing relative longitudinal movement between the sleeve and the mandrel and activating the quick lock/quick unlock system. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification