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US 2019/0292870 A1Published application
Novel wellhead connection for pressure-control operations
AssigneeLee Specialties Inc.
InventorsBrent Goy, Cliff Wahlstrom
Life of this patent
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Abstract
A wellhead connection is disclosed that includes a means for selectively clamping a nightcap or crossover to a flange assembly through selective application of hydraulic pressure to a hydraulic motor and a means for selectively positioning a nightcap through selective application of hydraulic pressure to a plurality of hydraulic cylinders.
Claims13
A wellhead connection comprising:
- (a) a flange assembly comprising:
- (i) a first flange-assembly end configured to connect to a wellhead;
- (ii) a second flange-assembly end comprising a clamp hub and a clamp-hub face;
- (iii) an interior surface defining a receptacle;
- (b) a clamp assembly comprising a plurality of clamp segments, wherein the clamp segments are each configured to engage the flange-assembly clamp hub;
- (c) a clamp-control assembly comprising:
- (i) a screw-threaded shaft;
- (ii) a motor configured to rotate the screw-threaded shaft;
- (iii) a first threaded positioning unit connected to one of the clamp segments;
- (iv) a second threaded positioning unit connected to one of the clamp segments different from the one of the clamp segments connected to the first threaded positioning unit;
- (v) wherein the screw-threaded shaft engages the threaded positioning units such that rotation of the screw-threaded shaft in one direction causes the positioning units to move toward each other and in the another direction causes the positioning units to move away from each other.
- (d) a nightcap-extractor assembly comprising:
- (i) a first elongated arm connected to the flange assembly;
- (ii) a second elongated arm connected to the first arm;
- (iii) a first hydraulic cylinder configured to selectively provide force to the first arm to move the first arm relative to the flange assembly;
- (iv) a second hydraulic cylinder to configured selectively provide force to the first arm relative to the flange assembly to rotate the first arm about the first arm's longitudinal axis.
13 more elements
A wellhead connection comprising:
- (a) a flange assembly comprising:
- (i) a first flange-assembly end configured to connect to a wellhead;
- (ii) a second flange-assembly end comprising a clamp hub;
- (b) a nightcap comprising a clamp hub;
- (c) a clamp configured to simultaneously engage the flange-assembly clamp hub and the nightcap clamp hub;
- (d) a seal configured to be disposed between the flange assembly and nightcap;
- (e) a clamp-control means for selectively engaging and disengaging the clamp with the flange-assembly clamp hub and the nightcap-assembly clamp hub;
- (f) a nightcap-positioning means for selectively engaging and disengaging the nightcap with the flange assembly.
5 more elements
A method of remotely operating a wellhead connection having a flange assembly to connect to a wellhead, a crossover to connect to pressure-control equipment, and a nightcap, the method comprising:
- (a) selectively positioning the nightcap, wherein selectively positioning the nightcap includes selective application of hydraulic pressure to at least one of a plurality of hydraulic cylinders;
- (b) selectively clamping and unclamping the nightcap to the flange assembly, wherein selectively clamping and unclamping the nightcap includes selective application of hydraulic pressure to at least one hydraulic motor;
- (c) selectively clamping and unclamping the crossover to the flange assembly, wherein selectively clamping and unclamping the crossover includes selective application of hydraulic pressure to at least one hydraulic motor.
Dependencies are inferred from the claim text.