Lower stabilizing arm for a drilling rig
AssigneeSchlumberger Technology Corporation
InventorsMelvin Alan Orr, Joe Rodney Berry, Robert Metz
Life of this patent
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Abstract
A lower stabilizing arm for stabilizing tubulars for stabbing to the threaded connections of a drill string on drilling rigs. The lower stabilizing arm comprises a bracket and an upper arm having an upper end and a lower end. An upper pair of axially opposed rotary actuators connects the upper end of the upper arm to the bracket. A lower arm is provided having an upper end and a lower end. A central rotary actuator is connected between the lower end of the upper arm and the upper end of the lower arm. A roller bracket is provided having a pair of v-shaped rollers mounted on the roller bracket. A lower pair of axially opposed rotary actuators connects the second end of the lower arm to the roller bracket.
Claims9
A lower stabilizing arm (800) for a drilling rig, comprising:
- a bracket (802);
- an upper arm (824) having an upper end (826) and a lower end (828);
- an upper pair of axially opposed rotary actuators (810, 820) connecting the upper end (826) of the upper arm (824) to the bracket (802);
- a lower arm (832) having an upper end (834) and a lower end (836);
- a central rotary actuator (830) connected between the lower end (828) of the upper arm (824) and the upper end (834) of the lower arm (832);
- a roller bracket (860);
- a lower pair of axially opposed rotary actuators (840, 850) connecting the lower end (836) of the lower arm (832) to the roller bracket (860);
- and,
- a pair of v shaped rollers (862) mounted on the roller bracket (860).
A lower stabilizing arm (800) for a drilling rig, comprising:
- a series of five rotational actuators (810, 820, 830, 840, 850) located on the length of the lower stabilizing arm (800);
- a roller bracket (860) located on a distal end of the arm (800);
- and,
- a pair of rollers (862) mounted on the roller bracket (860).
A lower stabilizing arm (800) for a drilling rig, comprising:
- a bracket (802);
- an upper arm (824) having an upper end (826) and a lower end (828);
- a first rotary actuator (810) mounted on the bracket (802);
- a first actuator coupling (815) connecting the first rotary actuator (810) to a second rotary actuator (820) between the upper end (826) of the upper arm (824) and the bracket (802);
- a lower arm (832) having an upper end (834) and a lower end (836);
- a third rotary actuator (830) connected between the lower end (828) of the upper arm (824) and the upper end (834) of the lower arm (832);
- a fourth rotary actuator (840) connected to the lower end (836) of the lower arm (832);
- a second actuator coupling (845) connecting the fourth rotary actuator (840) to a fifth rotary actuator (850);
- a roller bracket (860) connected to the fifth rotary actuator (850);
- and,
- a pair of v shaped rollers (862) mounted on the roller bracket (860).
Dependencies are inferred from the claim text.