Rotating and reciprocating swivel apparatus and method
First Claim
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;
(b) after step “
a”
, having the annular BOP close on the sleeve;
(c) after step “
b”
, 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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
3 Citations
20 Claims
-
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; (b) after step “
a”
, having the annular BOP close on the sleeve;(c) after step “
b”
, 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. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. 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 reciprocable with upper and lower sections of the drill string, the mandrel having an external perimeter and including a longitudinal passage forming a continuation of a flow bore of the drill string sections, the mandrel having an area of reduced external perimeter; (d) a sleeve having a longitudinal sleeve passage and an internal perimeter, the sleeve being reciprocably connected to the mandrel; (e) an interstitial space between the internal perimeter of the sleeve and the external perimeter of the mandrel which interstitial space is sealed by a seal unit, and wherein the interstitial space is overlapping the mandrel'"'"'s area of reduced external perimeter; (f) a pressure relief mechanism that gradually relieves pressure in the interstitial space when the mandrel and sleeve are elevated in a well bore, the pressure relief mechanism including the second packing unit, and the pressure relief mechanism being in an activated state when the seal unit at least partially extends over the mandrel'"'"'s area of reduced external perimeter, and the pressure relief mechanism being in a deactivated state when the seal unit does not extend at least partially over the area of reduced external perimeter of the mandrel. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification