# US 11,905,795 B1 · Coiled tubing snap arrestor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,905,795 B1 - Document ID: US11905795B1 - Status: Granted - Kind: B1 - Application number: 17/938,625 - Filed: 2022-10-06 - Granted: 2024-02-20 - Earliest claimed: 2022-10-06 - Assignees: Saudi Arabian Oil Company - Applicants: Saudi Arabian Oil Company - Inventors: Muhammad Ali Qureshi; Arris Riagung Riskiawan; Abdullah Shabib Dossary - Web page: https://patentgrep.com/patent/US11905795B1 ## CPC - E21B 40/00: Tubing catchers, automatically arresting the fall of oil-well tubing {(preventing small objects from falling into the borehole E21B41/0021)} - E21B 19/22: Handling reeled pipe or rod units, e.g. flexible drilling pipes {(lifting or hauling appliances using two or more cooperating endless chains B66D3/003)} - G01P 3/00: Measuring linear or angular speed; Measuring differences of linear or angular speeds (G01P5/00 - G01P11/00 take precedence; {direction and speed indication G01P13/045}; counting mechanisms G06M) - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G}) ## Abstract A coiled tubing system includes an injector assembly configured to receive and longitudinally move coiled tubing through the injector assembly, a well control stack operatively coupled to the injector assembly and configured to receive the coiled tubing from the injector assembly, and a snap arrestor including one or more wheels configured to rotate as the coiled tubing moves longitudinally, a tachometer that measures rotations per minute (RPM), and a microprocessor that receives and converts the RPM into a real-time measured linear speed of the coiled tubing. When the real-time measured linear speed of the coiled tubing exceeds a predetermined linear speed threshold, a command signal is sent to the injector assembly to grippingly engage the coiled tubing and thereby cease longitudinal movement of the coiled tubing. ## Claims ### Claim 1 A coiled tubing system, comprising: an injector assembly configured to receive and longitudinally move coiled tubing through the injector assembly; a well control stack operatively coupled to the injector assembly and configured to receive the coiled tubing from the injector assembly; and a snap arrestor including: one or more wheels configured to rotate as the coiled tubing moves longitudinally; a tachometer that measures rotations per minute (RPM) of the one or more wheels; and a microprocessor that receives and converts the RPM into a real-time measured linear speed of the coiled tubing, wherein, when the real-time measured linear speed of the coiled tubing exceeds a predetermined linear speed threshold, a command signal is sent to the injector assembly to grippingly engage the coiled tubing and thereby arrest longitudinal movement of the coiled tubing. ### Claim 2 (depends on 1) The system of claim 1, wherein the well control stack includes a stripper assembly and a blowout preventer, and wherein the stripper assembly interposes the injector assembly and the BOP, and the snap arrestor interposes the injector assembly and the stripper assembly. ### Claim 3 (depends on 1) The system of claim 1, wherein the one or more wheels comprise two wheels arranged on opposing sides of the coiled tubing and arranged to contact an outer surface of the coiled tubing. ### Claim 4 (depends on 3) The system of claim 3, wherein the one or more wheels provide constant lateral contact with the outer surface of the coiled tubing. ### Claim 5 (depends on 1) The system of claim 1, wherein the tachometer includes one or more sensors that measure and report the RPM. ### Claim 6 (depends on 5) The system of claim 5, wherein at least one of the one or more wheels provides one or more markings, and the one or more sensors are arranged to detect the one or more markings and thereby determine the RPM. ### Claim 7 (depends on 1) The system of claim 1, wherein the injector assembly comprises: a pair of endless drive chains positioned on opposite sides of the coiled tubing; a plurality of gripper blocks attached to each endless drive chain; and one or more hydraulic cylinders operable to force the plurality of gripper blocks into engagement with the coiled tubing, wherein the microprocessor communicates with the one or more hydraulic cylinders and sends the command signal to activate the one or more hydraulic cylinders to drive the plurality of gripper blocks into gripping engagement with the coiled tubing. ### Claim 8 (depends on 7) The system of claim 7, further comprising: a reel that feeds the coiled tubing to the injector assembly; one or more first hydraulic motors configured to drive rotation of the reel; one or more second hydraulic motors configured to drive rotation of the pair of endless drive chains and thereby longitudinally move the coiled tubing; a power source that provides hydraulic fluid for the one or more first and second hydraulic motors; and a control console in communication with the power source and operable to convey the hydraulic fluid to the one or more first and second hydraulic motors, wherein the microprocessor communicates with the control console and sends a command signal to cease operation of the one or more first and second hydraulic motors when the real-time measured linear speed of the coiled tubing exceeds the predetermined linear speed threshold. ### Claim 9 (depends on 1) The system of claim 1, wherein the injector assembly is selected from the group consisting of an opposed counter-rotating, chain drive system, an arched-chain roller drive system, a single-chain, opposed gripper-drive system, a sheave drive system, and any combination thereof. ### Claim 10 A method, comprising: receiving coiled tubing at an injector assembly having a well control stack operatively coupled thereto; operating the injector assembly to longitudinally move the coiled tubing through the injector assembly and the well control stack; calculating a real-time measured linear speed of the coiled tubing with a snap arrestor that includes: one or more wheels configured to rotate as the coiled tubing moves longitudinally; a tachometer that measures rotations per minute (RPM) of the one or more wheels; and a microprocessor that receives and converts the RPM into a real-time measured linear speed of the coiled tubing; sending a command signal to the injector assembly when the real-time measured linear speed of the coiled tubing exceeds a predetermined linear speed threshold; and in response to receipt of the command signal, grippingly engaging the coiled tubing with the injector assembly and thereby ceasing longitudinal movement of the coiled tubing. ### Claim 11 (depends on 10) The method of claim 10, wherein the one or more wheels comprise two wheels arranged on opposing sides of the coiled tubing, the method further comprising providing constant lateral contact with an outer surface of the coiled tubing with the one or more wheels. ### Claim 12 (depends on 10) The method of claim 10, wherein the tachometer includes one or more sensors, the method further comprising: measuring the RPM of the one or more wheels with the one or more sensors; and reporting the RPM to the microprocessor. ### Claim 13 (depends on 12) The method of claim 12, wherein at least one of the one or more wheels provides one or more markings, the method further comprising detecting the one or more markings with the one or more sensors and thereby determining the RPM. ### Claim 14 (depends on 10) The method of claim 10, wherein the injector assembly includes a pair of endless drive chains positioned on opposite sides of the coiled tubing, a plurality of gripper blocks attached to each endless drive chain, and one or more hydraulic cylinders operable to force the plurality of gripper blocks into engagement with the coiled tubing, wherein sending the command signal to the injector assembly comprises: sending the command signal to the one or more hydraulic cylinders with the microprocessor; and grippingly engaging the coiled tubing with the plurality of gripper blocks in response to receipt of the command signal. ### Claim 15 (depends on 14) The method of claim 14, wherein a reel feeds the coiled tubing to the injector assembly, one or more first hydraulic motors are operable to drive rotation of the reel, and one or more second hydraulic motors are operable to configured to drive rotation of the pair of endless drive chains and thereby longitudinally move the coiled tubing, the method further comprising: providing hydraulic fluid for the one or more first and second hydraulic motors with a power source; manipulating one or more valves via operation of a control console in communication with the power source and thereby selectively conveying the hydraulic fluid to the one or more first and second hydraulic motors; and sending a command signal from the microprocessor to the control console to cease operation of the one or more first and second hydraulic motors when the real-time measured linear speed of the coiled tubing exceeds the predetermined linear speed threshold.