Snubbing unit drilling system
OwnerDavid A. Buck, Daniel S. Bangertinventors
Life of this patent
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Abstract
A snubbing unit drilling system which includes a power tong and a hydraulically activated back-up tong. A mounting structure having a rotating slip assembly positioned thereon such that the rotating slip assembly rotates relative to the mounting structure. A plurality of support legs are attached between the power tong, the back-up tong, and the mounting structure such that the support legs prevent relative rotation between the power tong and the mounting structure.
Claims25
A snubbing unit drilling system comprising:
- a. a power tong;
- b. a hydraulically activated back-up tong;
- c. a mounting structure having a rotating slip assembly positioned thereon, including a circular track and a hub rotatingly mounted on said track;
- and
- d. a plurality of support legs attached between said power tong, said back-up tong, and said mounting structure such that said support legs prevent relative rotation between said power tong and said mounting structure.
A method of rotating a tubular string comprising the steps of;
- a. supporting a tubular string in a freely rotating slip assembly which includes a circular track and a hub rotatingly mounted on said track;
- b. fixing a power tong and a hydraulically activated back-up tong in line with said tubular string;
- and
- c. gripping said tubular string with said power tong and applying torque to said tubular string with said power tong.
A snubbing unit drilling system comprising:
- a. a power tong wherein said power tong has an enclosed gear train positioned in an oil bath;
- b. a mounting structure having a rotating slip assembly positioned thereon such that said rotating slip assembly may rotate relative to said mounting structure;
- and
- c. a support attached to said power tong, such that said power tong is prevented from rotating relative to said rotating slip assembly.
A snubbing unit drilling system comprising:
- a. a power tong;
- b. a hydraulically activated back-up tong;
- c. a mounting structure having a rotating slip assembly positioned thereon including a circular track and a hub rotatingly mounted on said track;
- and
- d. a support attached to one of either said power tong or said back-up tong, such that said power tong is prevented from rotating relative to said rotating slip assembly.
A snubbing unit drilling system comprising:
- a. a power tong having a gear train, wherein at least a portion of said gear train is enclosed and positioned in an oil bath;
- b. a back-up tong;
- c. a mounting structure having a rotating slip assembly positioned thereon such that said rotating slip assembly may rotate relative to said mounting structure;
- and
- d. a support attached to one of either said power tong or said back-up tong, such that said power tong is prevented from rotating relative to said rotating slip assembly.
Dependencies are inferred from the claim text.