简介:An Tech公司最近发布一款产品，能够在高压深水海洋管柱布置作业中检测管柱接头。该系统使用磁场法来检测。

AnTech has recently unveiled a sensor that promises to “see through steel.” The company’s Triple Sensor Tool Joint System, or MDET-S, is a new sensor technology designed to automatically detect tool joints in risers during the deployment of tubing strings in high-pressure, deepwater fields.

The new system detects tool joints by measuring changes in magnetic fields that are triggered when a joint passes through the field. It was developed to improve the safety and efficiency of deploying tubing strings under pressure for an oilfield-service provider performing well-intervention operations in the US Gulf of Mexico.

The service company will employ the MDET-S in a deepwater, high-pressure field situated in more than 6,000 ft of water that is being developed using a permanently moored semisubmersible production and drilling facility.

To support the well-intervention activities for this deepwater field, AnTech’s client developed a hydraulic workover (HWO) system, which is located under the rig floor with heave compensation provided by the rig’s riser-tensioning system. Special rig-assist HWO equipment, combined with a purpose-built blowout preventer (BOP) stack, are being used to deploy the tubing strings under pressure.

To ensure that string deployment is carried out safely, a technician must know when the tool joints are correctly located within the BOP stack so that the joint can be passed through the set of pressure seals into or out of the wellbore. Locating tool joints and positioning the tubing string has traditionally been done manually, a laborious exercise that carries some safety risks to the technician.

The MDET-S, therefore, was born out of a need to replace this manual method with a device that could automatically detect tool joints and alert the technician when the joint had moved into the field of sensors.

AnTech drew on its 16-year history of developing and manufacturing magnetic wellhead sensors for deepwater operations during the development of the MDET-S. To accommodate the magnitude of the new deepwater installation, the company designed the system with three sets of two sensors, which detect changes in the surrounding magnetic field brought about by the additional thickness of the metal joint as it passes through the field. No markers are required on the pipe joints for this measurement.

Once the sensors detect this shift in the magnetic field, they emit an electrical signal which is transmitted to a control box. The box alerts the technician that a tool joint has passed by a pair of sensors, and additionally transmits digital and analog signals to an external data-acquisition system that transfers the readings to a file located on the technician’s laptop. The technician can then analyze this data and proceed, certain that the tool joint has reached its target destination.

“The MDET-S makes it possible for engineers to effectively ’see through steel’ without manually measuring and identifying their location visually,” said Toni Miszewski, managing director of AnTech. “With its ability to pinpoint the location of the tool joint through shifts in the magnetic fields surrounding the sensors, the entire process is much safer and efficient, as well as more reliable.”

For further information, contact Toni Miszewski at +44 (0)1392 440 300 or by email. Additional information can also be found at www.antech.co.uk.

杨宝剑 是振威（全球）石油网的高级技术编辑，在石油技术资讯行业有八年的学识和经验。他源源不断地提供石油行业全球最新的技术创新、研发成果、现场应用情况等信息。如果你对该项新技术有任何的疑问，或者对“新技术新产品”未来的内容有任何问题或建议，请联系杨宝剑编辑 +86 10-58236512 Email：allenyo@zhenweiexpo.com 欢迎与行业互动！