Oilfield tubular spin-in and spin-out detection for making-up and breaking-out tubular strings
First Claim
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1. An oilfield tubular spinner for an oilfield tubular torque wrench, the oilfield tubular spinner comprising:
- a powered spin roller including an axis of rotation;
a spin motor operatively connected to, and configured to drive, the powered spin roller to rotate about its axis of rotation, anda shoulder-up system comprising;
a pressure sensor configured to sense a fluid pressure of a system driving the spin motor;
a memory storage configured to store a pressure threshold indicative of a motor pressure during a shoulder up condition; and
a comparator configured to continuously compare output from the pressure sensor to the pressure threshold, the comparator asserting the shoulder-up condition when the pressure sensor output reaches the pressure threshold,wherein the shoulder-up, system is configured to detect a shoulder-up condition of a pair of tubulars being driven to threadedly connect by the powered spin roller and to initiate spin motor shutdown subsequent to the detection of the shoulder-up condition, wherein the detection is monitored by an oilfield tubular spinner control system and based on a plurality of variables.
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Abstract
Spin-in and spin-out apparatus and methods are presented wherein an oilfield tubular spinner used in combination with a wrench detects the shouldering-up of tubulars during make-up and tubular thread disengagement during break-out. Sensors are employed to quantify measurables indicative of shouldering-up and thread disengagement, the measurables being used to shutdown spin-in and spin-out operations. Thresholds are employed to detect measurable values of interest. Timers are employed to monitor and control the spin-in and spin-out operations.
134 Citations
20 Claims
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1. An oilfield tubular spinner for an oilfield tubular torque wrench, the oilfield tubular spinner comprising:
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a powered spin roller including an axis of rotation; a spin motor operatively connected to, and configured to drive, the powered spin roller to rotate about its axis of rotation, and a shoulder-up system comprising; a pressure sensor configured to sense a fluid pressure of a system driving the spin motor; a memory storage configured to store a pressure threshold indicative of a motor pressure during a shoulder up condition; and a comparator configured to continuously compare output from the pressure sensor to the pressure threshold, the comparator asserting the shoulder-up condition when the pressure sensor output reaches the pressure threshold, wherein the shoulder-up, system is configured to detect a shoulder-up condition of a pair of tubulars being driven to threadedly connect by the powered spin roller and to initiate spin motor shutdown subsequent to the detection of the shoulder-up condition, wherein the detection is monitored by an oilfield tubular spinner control system and based on a plurality of variables. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for threadedly connecting an upper tubular and a lower tubular, each having a threaded interval, using an oilfield tubular spinner and a torque wrench, the method comprising:
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providing an oilfield tubular spinner comprising a powered spin roller including an axis of rotation, a spin motor operatively connected to, and configured to drive, the powered spin roller to rotate about its axis of rotation; providing a shoulder-up system comprising a pressure sensor configured to sense a fluid pressure of a system driving the spin motor, a memory storage configured to store a pressure threshold indicative of a motor pressure during a shoulder up condition, and a comparator configured to continuously compare output from the pressure sensor to the pressure threshold, the comparator asserting the shoulder-up condition when the pressure sensor output reaches the pressure threshold, wherein the shoulder-up, system is configured to detect a shoulder-up condition of the pair of tubulars being driven to threadedly connect by the powered spin roller and wherein the detection is monitored by an oilfield tubular spinner control system and based on a plurality of variables; holding the lower tubular with the torque wrench; aligning the upper tubular with the lower tubular with their threaded intervals arranged for threaded connection therebetween; frictionally engaging the upper tubular with the tubular spinner; operating a hydraulic motor of the tubular spinner to rotate the upper tubular relative to the lower tubular; monitoring hydraulic fluid pressure of the hydraulic spin motor to detect a pressure condition of interest during rotation of the upper tubular relative to the lower tubular; and shutting down the hydraulic spin motor after a pressure condition of interest is detected. - View Dependent Claims (17, 18, 19, 20)
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Specification