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US 11,236,574 B2Granted
Subsea assist snubbing jack
AssigneeOceaneering International, Inc.
InventorsJohn R. Cook, Robert L. Ewen, Harris Akhtar Iqbal
Life of this patent
Estimating the term…
Abstract
A subsea assist snubbing jack comprises bi-directional slip bowls and can hold light or heavy pipe loads, create clamping load internally without relying on pipe weight or the force of the subsea assist snubbing jack to develop clamping force; do not require pipe motion to unseat the clamp on the pipe; utilize smooth faced inserts that do not mark the pipe; and are suitable for subsea control by wire operation. In embodiments, it is also instrumented to directly measure the pipe weight being held by one or both slip bowls.
Claims18
A subsea assist snubbing jack, comprising:
- a. a plurality of jack legs;
- b. a leg actuator operatively connected to a predetermined set of jack legs of the plurality of jack legs, the leg actuator comprising a subsea electric motor;
- c. a first slip bowl disposed at least partially within the plurality of jack legs;
- d. a second slip bowl movingly disposed at least partially within the plurality of jack legs distally from the first slip bowl, the second slip bowl operatively connected to the plurality of jack legs;
- e. a control system operatively in communication with the leg actuator, the control system comprising:
- i. a monitor operatively in communication with the plurality of jack legs, the first slip bowl, and the second slip bowl;
- and
- ii. software operative to adjust each jack leg of the plurality of jack legs to ensure that a pipe is being snubbed into a well concentrically;
- and
- f. a predetermined set of smooth faced inserts that do not mark a pipe.
7 more elements
Dependencies are inferred from the claim text.