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","版权所有。",{"id":49,"setCode":71,"code":140,"name":141,"slot":142,"sort":54,"blocks":143},"site_floating","悬浮工具","floating",[144],{"blockKey":120,"colIndex":78,"props":145,"status":5},{"items":146},[147,152,153],{"url":148,"icon":149,"color":150,"label":151},"tel:+8618366940225","i-lucide-phone","#0f172a","Call us",{"url":124,"icon":125,"color":126,"label":127},{"url":129,"icon":130,"color":131,"label":154},"Email us",{"id":156,"typeCode":157,"slug":158,"title":159,"summary":160,"cover":161,"body":162,"bodyFormat":163,"publishTime":164,"seoTitle":159,"seoKeywords":165,"seoDescription":166,"data":167,"availableLocales":168},570,"product","reversing-sub-reversing-spear-oilfield-fishing-tool","Reversing Sub","SENNUO Reversing Sub, also called a reversing spear , is a downhole fishing tool for stuck drill stem recovery, stuck pipe treatment, and fish retrieval in oil and gas wells. Field crews use it to reverse and release stuck drill stem above the stuck point during drilling, workover, and well…","\u002Fuploads\u002F1\u002F2026\u002F10\u002Fe579d6605bf249ea975744867518c143.png","\u003Ch2>Reversing Sub \u002F Reversing Spear for Oilfield Fishing and Stuck Pipe Recovery\u003C\u002Fh2>\n\u003Ch2>SENNUO Reversing Sub Manufacturer for Drilling, Workover, and Downhole Fishing Operations\u003C\u002Fh2>\n\u003Cp>SENNUO Reversing Sub, also called a \u003Cstrong>reversing spear\u003C\u002Fstrong>, is a downhole fishing tool for stuck drill stem recovery, stuck pipe treatment, and fish retrieval in oil and gas wells. Field crews use it to reverse and release stuck drill stem above the stuck point during drilling, workover, and well intervention operations.\u003C\u002Fp>\n\u003Cp>In difficult wellbore conditions, drill pipe, tubing, or downhole tools may become stuck because of differential sticking, cuttings buildup, borehole collapse, key seating, or other downhole problems. When standard fishing or back-off methods cannot release the fish, this tool helps the operator apply controlled reverse torque to the stuck section.\u003C\u002Fp>\n\u003Cp>During stuck drill stem treatment, the SENNUO tool can also work as a \u003Cstrong>fishing pin tap\u003C\u002Fstrong>. It connects with the fishing drill string, engages the fish through the catch thread, transfers torque, and helps the crew unscrew or recover the stuck drill stem. If the fish does not reverse successfully, the operator can release from the tool and pull the fishing drill assembly out of the wellbore.\u003C\u002Fp>\n\u003Cp>As an experienced \u003Cstrong>reversing sub supplier\u003C\u002Fstrong>, SENNUO offers multiple O.D., I.D., thread connection, catch thread, and thread direction options. Available connections include \u003Cstrong>NC31, NC38, NC40, NC46, NC50, NC56, NC61, 2 7\u002F8 NU, 2 7\u002F8 EU, 3 1\u002F2 EU, 4 1\u002F2 FH, 5 1\u002F2 FH, 6 5\u002F8 REG, 6 5\u002F8 FH, and 7 5\u002F8 REG\u003C\u002Fstrong>.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>Product Description\u003C\u002Fh2>\n\u003Cp>The SENNUO Reversing Sub gives oilfield crews a reliable solution for \u003Cstrong>stuck pipe recovery\u003C\u002Fstrong> and \u003Cstrong>downhole fishing operations\u003C\u002Fstrong>. When a drill stem becomes stuck in an oil or gas well, the fishing crew needs a secure connection point to apply reverse torque and back off the stuck section. This downhole reversing tool helps complete that operation with better control.\u003C\u002Fp>\n\u003Cp>SENNUO designs the tool with a strong body structure, precision-machined threads, and stable torque transmission performance. These details help improve connection reliability during demanding fishing jobs. In addition, SENNUO supplies left-hand and right-hand thread configurations to match different drill strings, fishing tools, fish conditions, and reversing programs.\u003C\u002Fp>\n\u003Cp>The tool works well in drilling, workover, stuck drill stem treatment, drill pipe fishing, tubing fishing, back-off operation, and well intervention. It helps reduce non-productive time, protect the fishing assembly, and improve recovery efficiency.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>Key Features\u003C\u002Fh2>\n\u003Cul>\n\u003Cli>Designed for oil and gas drilling, workover, and fishing operations\u003C\u002Fli>\n\u003Cli>Helps reverse stuck drill stem above the stuck point\u003C\u002Fli>\n\u003Cli>Supports stuck pipe recovery and downhole fish retrieval\u003C\u002Fli>\n\u003Cli>Works as a fishing pin tap during reversing operation\u003C\u002Fli>\n\u003Cli>Transfers reverse torque smoothly to the target section\u003C\u002Fli>\n\u003Cli>Available with LH\u002FRH, RH\u002FLH, and RH\u002FRH thread configurations\u003C\u002Fli>\n\u003Cli>Matches common oilfield connections such as NC, FH, REG, NU, and EU\u003C\u002Fli>\n\u003Cli>Suitable for drill pipe, tubing, and downhole tool fishing jobs\u003C\u002Fli>\n\u003Cli>Helps reduce fishing risk, tool loss, and operation downtime\u003C\u002Fli>\n\u003Cli>Supports custom sizes, drawings, and thread combinations\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Chr\u002F>\n\u003Ch2>Oilfield Applications\u003C\u002Fh2>\n\u003Cp>SENNUO Reversing Sub is built for oilfield environments where crews need to recover stuck drill stem, drill pipe, tubing, or downhole tools from oil and gas wells.\u003C\u002Fp>\n\u003Ch3>Typical applications include:\u003C\u002Fh3>\n\u003Cul>\n\u003Cli>Stuck drill stem recovery in oil and gas drilling operations\u003C\u002Fli>\n\u003Cli>Drill pipe fishing during well drilling and well intervention\u003C\u002Fli>\n\u003Cli>Tubing fishing in oilfield workover operations\u003C\u002Fli>\n\u003Cli>Back-off operation above the stuck point\u003C\u002Fli>\n\u003Cli>Downhole fish recovery in oil and gas wells\u003C\u002Fli>\n\u003Cli>Stuck pipe treatment after differential sticking or borehole obstruction\u003C\u002Fli>\n\u003Cli>Fishing drill tool connection and release operation\u003C\u002Fli>\n\u003Cli>Workover fishing in production wells and service wells\u003C\u002Fli>\n\u003Cli>Retrieval of stuck downhole tools during oilfield maintenance\u003C\u002Fli>\n\u003Cli>Reversing operation in complex wellbore fishing programs\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>The tool supports different thread directions and catch thread types. Therefore, field crews can select a suitable configuration according to the fishing plan, drill string design, and downhole condition.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>How the Reversing Sub Works\u003C\u002Fh2>\n\u003Cp>During an oilfield fishing operation, the operator runs the tool with the fishing drill string into the wellbore. The catch thread engages the fish. After proper engagement, the operator applies controlled reverse torque from the surface.\u003C\u002Fp>\n\u003Cp>This torque helps unscrew or release the stuck drill stem above the stuck point. If the fish remains stuck and the reversing process cannot continue, the operator can release from the sub and pull the fishing drill tool out of the well.\u003C\u002Fp>\n\u003Cp>This function helps protect the fishing assembly, reduce downhole risk, and improve the chance of successful tool recovery.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>Product Advantages\u003C\u002Fh2>\n\u003Ch3>Reliable Torque Transmission\u003C\u002Fh3>\n\u003Cp>The SENNUO reversing tool transfers reverse torque directly to the target section. This helps oilfield crews improve control during stuck drill stem recovery, stuck pipe fishing, and drill stem back-off operations.\u003C\u002Fp>\n\u003Ch3>Accurate Thread Matching\u003C\u002Fh3>\n\u003Cp>SENNUO offers LH\u002FRH, RH\u002FLH, and RH\u002FRH thread configurations. These options help match different drill strings, fishing tools, and fish conditions in oil and gas wells.\u003C\u002Fp>\n\u003Ch3>Strong Oilfield Compatibility\u003C\u002Fh3>\n\u003Cp>The tool fits many drilling and workover fishing assemblies. It supports common oilfield connections and works with drill pipe, tubing, and other downhole fishing tools.\u003C\u002Fp>\n\u003Ch3>Practical Fishing Function\u003C\u002Fh3>\n\u003Cp>The tool can work as a fishing pin tap during stuck pipe treatment. It helps operators engage the fish, apply torque, and complete controlled reversing operation.\u003C\u002Fp>\n\u003Ch3>Lower Operation Risk\u003C\u002Fh3>\n\u003Cp>If the fish cannot reverse, the operator can release from the tool and trip out the fishing drill assembly. This helps reduce the risk of losing more tools in the wellbore.\u003C\u002Fp>\n\u003Ch3>Custom Manufacturing Support\u003C\u002Fh3>\n\u003Cp>SENNUO can provide custom reversing subs according to customer requirements. Buyers can specify O.D., I.D., thread connection, catch thread, thread direction, drawings, and operating conditions.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>Quality Control and Inspection\u003C\u002Fh2>\n\u003Cp>SENNUO focuses on stable connection performance and reliable field use. Before delivery, our team checks key dimensions, thread accuracy, connection matching, and surface condition. These inspections help the tool connect properly with the fishing drill string and perform reliably during oilfield fishing operations.\u003C\u002Fp>\n\u003Cp>For custom orders, SENNUO can manufacture reversing subs according to customer drawings, thread details, or special wellsite requirements. Customers can also provide fishing programs, fish details, and operating conditions so our team can help match the right tool configuration.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>Technical Specifications\u003C\u002Fh2>\n\u003Ch2>Specifications – Reversing Sub\u003C\u002Fh2>\n\u003Ch3>Thread Conn.: LH \u002F Catch Thread: RH\u003C\u002Fh3>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Model\u003C\u002Fth>\n\u003Cth>O.D. (mm)\u003C\u002Fth>\n\u003Cth>I.D. (mm)\u003C\u002Fth>\n\u003Cth>Thread Conn. (LH)\u003C\u002Fth>\n\u003Cth>Catch Thread (RH)\u003C\u002Fth>\n\u003C\u002Ftr>\n\u003C\u002Fthead>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>DKJ105\u003C\u002Ftd>\n\u003Ctd>105\u003C\u002Ftd>\n\u003Ctd>14\u003C\u002Ftd>\n\u003Ctd>NC31\u003C\u002Ftd>\n\u003Ctd>NC31\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ105\u003C\u002Ftd>\n\u003Ctd>105\u003C\u002Ftd>\n\u003Ctd>18\u003C\u002Ftd>\n\u003Ctd>NC31\u003C\u002Ftd>\n\u003Ctd>2 7\u002F8 NU\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ121\u003C\u002Ftd>\n\u003Ctd>121\u003C\u002Ftd>\n\u003Ctd>20\u003C\u002Ftd>\n\u003Ctd>NC38\u003C\u002Ftd>\n\u003Ctd>NC38\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ140\u003C\u002Ftd>\n\u003Ctd>140\u003C\u002Ftd>\n\u003Ctd>20\u003C\u002Ftd>\n\u003Ctd>NC40\u003C\u002Ftd>\n\u003Ctd>NC40\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ159\u003C\u002Ftd>\n\u003Ctd>159\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>NC46\u003C\u002Ftd>\n\u003Ctd>NC46\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ165\u003C\u002Ftd>\n\u003Ctd>165\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC46\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ165\u003C\u002Ftd>\n\u003Ctd>165\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ165\u003C\u002Ftd>\n\u003Ctd>165\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>5 1\u002F2 FH\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ178\u003C\u002Ftd>\n\u003Ctd>178\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>5 1\u002F2 FH\u003C\u002Ftd>\n\u003Ctd>5 1\u002F2 FH\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ190\u003C\u002Ftd>\n\u003Ctd>190\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>6 5\u002F8 REG\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ203\u003C\u002Ftd>\n\u003Ctd>203\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC61\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ203\u003C\u002Ftd>\n\u003Ctd>203\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>6 5\u002F8 FH\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ203\u003C\u002Ftd>\n\u003Ctd>203\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>7 5\u002F8 REG\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Chr\u002F>\n\u003Ch2>Specifications – Reversing Sub\u003C\u002Fh2>\n\u003Ch3>Thread Conn.: RH \u002F Catch Thread: LH\u003C\u002Fh3>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Model\u003C\u002Fth>\n\u003Cth>O.D. (mm)\u003C\u002Fth>\n\u003Cth>I.D. (mm)\u003C\u002Fth>\n\u003Cth>Thread Conn. (RH)\u003C\u002Fth>\n\u003Cth>Catch Thread (LH)\u003C\u002Fth>\n\u003C\u002Ftr>\n\u003C\u002Fthead>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>DKJ105A\u003C\u002Ftd>\n\u003Ctd>105\u003C\u002Ftd>\n\u003Ctd>14\u003C\u002Ftd>\n\u003Ctd>NC31\u003C\u002Ftd>\n\u003Ctd>NC31\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ121A\u003C\u002Ftd>\n\u003Ctd>121\u003C\u002Ftd>\n\u003Ctd>20\u003C\u002Ftd>\n\u003Ctd>NC38\u003C\u002Ftd>\n\u003Ctd>NC38\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ146A\u003C\u002Ftd>\n\u003Ctd>146\u003C\u002Ftd>\n\u003Ctd>25\u003C\u002Ftd>\n\u003Ctd>4 1\u002F2 FH\u003C\u002Ftd>\n\u003Ctd>4 1\u002F2 FH\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ168A\u003C\u002Ftd>\n\u003Ctd>168\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ168A\u003C\u002Ftd>\n\u003Ctd>168\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC46\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ178A\u003C\u002Ftd>\n\u003Ctd>178\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>5 1\u002F2 FH\u003C\u002Ftd>\n\u003Ctd>5 1\u002F2 FH\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ178A\u003C\u002Ftd>\n\u003Ctd>178\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC56\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Chr\u002F>\n\u003Ch2>Specifications – Reversing Sub\u003C\u002Fh2>\n\u003Ch3>Thread Conn.: RH \u002F Catch Thread: RH\u003C\u002Fh3>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Model\u003C\u002Fth>\n\u003Cth>O.D. (mm)\u003C\u002Fth>\n\u003Cth>I.D. (mm)\u003C\u002Fth>\n\u003Cth>Thread Conn. (RH)\u003C\u002Fth>\n\u003Cth>Catch Thread (RH)\u003C\u002Fth>\n\u003C\u002Ftr>\n\u003C\u002Fthead>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>DKJ93B\u003C\u002Ftd>\n\u003Ctd>93\u003C\u002Ftd>\n\u003Ctd>18\u003C\u002Ftd>\n\u003Ctd>2 7\u002F8 EU\u003C\u002Ftd>\n\u003Ctd>2 7\u002F8 EU\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ105B\u003C\u002Ftd>\n\u003Ctd>105\u003C\u002Ftd>\n\u003Ctd>14\u003C\u002Ftd>\n\u003Ctd>NC31\u003C\u002Ftd>\n\u003Ctd>NC31\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ114B\u003C\u002Ftd>\n\u003Ctd>114\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>3 1\u002F2 EU\u003C\u002Ftd>\n\u003Ctd>3 1\u002F2 EU\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ121B\u003C\u002Ftd>\n\u003Ctd>121\u003C\u002Ftd>\n\u003Ctd>18\u003C\u002Ftd>\n\u003Ctd>NC38\u003C\u002Ftd>\n\u003Ctd>NC38\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ140B\u003C\u002Ftd>\n\u003Ctd>140\u003C\u002Ftd>\n\u003Ctd>20\u003C\u002Ftd>\n\u003Ctd>NC40\u003C\u002Ftd>\n\u003Ctd>NC40\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ165B\u003C\u002Ftd>\n\u003Ctd>165\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC46\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ165B\u003C\u002Ftd>\n\u003Ctd>165\u003C\u002Ftd>\n\u003Ctd>28\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ178B\u003C\u002Ftd>\n\u003Ctd>178\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>5 1\u002F2 FH\u003C\u002Ftd>\n\u003Ctd>5 1\u002F2 FH\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ178B\u003C\u002Ftd>\n\u003Ctd>178\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>NC50\u003C\u002Ftd>\n\u003Ctd>NC56\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>DKJ210B\u003C\u002Ftd>\n\u003Ctd>210\u003C\u002Ftd>\n\u003Ctd>32\u003C\u002Ftd>\n\u003Ctd>6 5\u002F8 FH\u003C\u002Ftd>\n\u003Ctd>6 5\u002F8 FH\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Chr\u002F>\n\u003Ch2>How to Select the Right Reversing Sub\u003C\u002Fh2>\n\u003Cp>Choosing the correct tool helps improve fishing efficiency and reduce downhole risk. Before ordering, customers should confirm the well condition, fish type, thread connection, catch thread, and reversing plan.\u003C\u002Fp>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Selection Item\u003C\u002Fth>\n\u003Cth>What to Confirm\u003C\u002Fth>\n\u003C\u002Ftr>\n\u003C\u002Fthead>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>Oilfield operation type\u003C\u002Ftd>\n\u003Ctd>Drilling, workover, well intervention, or fishing operation\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Fish type\u003C\u002Ftd>\n\u003Ctd>Drill pipe, tubing, stuck drill stem, or downhole tool\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Tool O.D.\u003C\u002Ftd>\n\u003Ctd>Match the wellbore size and fishing assembly\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Tool I.D.\u003C\u002Ftd>\n\u003Ctd>Confirm circulation and operation requirements\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Thread connection\u003C\u002Ftd>\n\u003Ctd>Match the drill string or fishing tool connection\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Catch thread\u003C\u002Ftd>\n\u003Ctd>Match the fish or engaged section\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Thread direction\u003C\u002Ftd>\n\u003Ctd>Choose LH\u002FRH, RH\u002FLH, or RH\u002FRH according to the reversing plan\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Downhole condition\u003C\u002Ftd>\n\u003Ctd>Confirm depth, torque demand, sticking cause, and wellbore condition\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>Custom requirement\u003C\u002Ftd>\n\u003Ctd>Provide special thread, size, drawing, or connection details if needed\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Cp>SENNUO can recommend a suitable reversing sub model according to your fishing program, thread details, and oilfield operating requirements.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>Why Choose SENNUO Reversing Sub?\u003C\u002Fh2>\n\u003Cp>SENNUO supplies oilfield drilling equipment, workover equipment, and downhole fishing tools for demanding field operations. Our team understands that fishing jobs require accurate thread matching, reliable torque transfer, and strong tool performance.\u003C\u002Fp>\n\u003Ch3>SENNUO advantages include:\u003C\u002Fh3>\n\u003Cul>\n\u003Cli>Experience in oilfield drilling and workover equipment supply\u003C\u002Fli>\n\u003Cli>Multiple standard reversing sub models available\u003C\u002Fli>\n\u003Cli>Support for common oilfield thread connections\u003C\u002Fli>\n\u003Cli>Strong compatibility with fishing drill tools and drill strings\u003C\u002Fli>\n\u003Cli>Practical solutions for stuck drill stem and downhole fish recovery\u003C\u002Fli>\n\u003Cli>Custom reversing sub manufacturing for special oilfield requirements\u003C\u002Fli>\n\u003Cli>Technical support for model selection and fishing tool matching\u003C\u002Fli>\n\u003Cli>Stable supply for drilling contractors, oilfield service companies, and equipment distributors\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Chr\u002F>\n\u003Ch2>Related Oilfield Fishing Tools\u003C\u002Fh2>\n\u003Cp>SENNUO also supplies related oilfield fishing and well intervention tools for drilling and workover operations. These products can help customers build a more complete fishing tool package for different wellbore conditions.\u003C\u002Fp>\n\u003Cul>\n\u003Cli>Taper Tap\u003C\u002Fli>\n\u003Cli>Die Collar\u003C\u002Fli>\n\u003Cli>Fishing Magnet\u003C\u002Fli>\n\u003Cli>Reverse Circulation Junk Basket\u003C\u002Fli>\n\u003Cli>Washover Pipe\u003C\u002Fli>\n\u003Cli>Mechanical Internal Cutter\u003C\u002Fli>\n\u003Cli>Mechanical External Cutter\u003C\u002Fli>\n\u003Cli>Releasing Spear\u003C\u002Fli>\n\u003Cli>Junk Sub\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>This related product section helps buyers find matching tools and supports stronger internal linking for SENNUO oilfield fishing tool pages.\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>Request a Quote\u003C\u002Fh2>\n\u003Cp>Looking for a reliable \u003Cstrong>reversing sub manufacturer\u003C\u002Fstrong> or \u003Cstrong>reversing spear supplier\u003C\u002Fstrong> for oilfield drilling, workover, or stuck pipe fishing operations?\u003C\u002Fp>\n\u003Cp>Please send SENNUO your required details:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>Model or drawing\u003C\u002Fli>\n\u003Cli>Tool O.D. and I.D.\u003C\u002Fli>\n\u003Cli>Thread connection\u003C\u002Fli>\n\u003Cli>Catch thread\u003C\u002Fli>\n\u003Cli>Thread direction\u003C\u002Fli>\n\u003Cli>Fish type\u003C\u002Fli>\n\u003Cli>Well condition\u003C\u002Fli>\n\u003Cli>Quantity requirement\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>Send your fishing program, thread details, or tool drawing to SENNUO. Our team will help you match the right reversing sub for your well condition.\u003C\u002Fp>\n\u003Cp>\u003Ca href=\"\u002Fcontact\u002F\">\u003Cstrong>Contact SENNUO today for product details, technical support, and a competitive quotation.\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\n\u003Chr\u002F>\n\u003Ch2>FAQ – Reversing Sub \u002F Reversing Spear\u003C\u002Fh2>\n\u003Ch2>1. What is a reversing sub in oilfield drilling?\u003C\u002Fh2>\n\u003Cp>A reversing sub is an oilfield fishing tool that helps operators reverse and release stuck drill stem above the stuck point. Crews use it during drilling, workover, and well intervention operations when drill pipe, tubing, or downhole tools become stuck in an oil or gas well. It supports controlled reverse torque transfer and helps improve stuck pipe recovery efficiency.\u003C\u002Fp>\n\u003Ch2>2. Is a reversing sub the same as a reversing spear?\u003C\u002Fh2>\n\u003Cp>Yes. Many oilfield crews call this tool a \u003Cstrong>reversing spear\u003C\u002Fstrong>. Both names refer to a downhole fishing tool used for stuck drill stem recovery, stuck pipe treatment, and reversing operation. Buyers may search for either “reversing sub” or “reversing spear” when selecting tools for oilfield fishing jobs.\u003C\u002Fp>\n\u003Ch2>3. What does a reversing sub do during stuck pipe recovery?\u003C\u002Fh2>\n\u003Cp>During stuck pipe recovery, the tool connects with the fishing drill string and engages the fish through its catch thread. The operator then applies reverse torque from the surface. This action helps unscrew, back off, or release the stuck drill stem above the stuck point. As a result, the crew can recover the fishing assembly with better control.\u003C\u002Fp>\n\u003Ch2>4. When should oilfield crews use a reversing sub?\u003C\u002Fh2>\n\u003Cp>Oilfield crews use this tool when normal fishing tools cannot release stuck drill pipe, tubing, or downhole tools. It works well in stuck drill stem treatment, drill pipe fishing, tubing fishing, workover fishing, back-off operation, and complex wellbore fishing programs. It also helps reduce downhole risk when the fish cannot reverse through standard methods.\u003C\u002Fp>\n\u003Ch2>5. Can the reversing sub work as a fishing pin tap?\u003C\u002Fh2>\n\u003Cp>Yes. During stuck drill stem treatment, it can work as a fishing pin tap. The tool engages the fish, transfers reverse torque, and helps the operator perform a controlled reversing operation. This function makes it useful in oilfield stuck pipe recovery, drill stem back-off, and downhole fish retrieval.\u003C\u002Fp>\n\u003Ch2>6. What thread connections does SENNUO offer for reversing subs?\u003C\u002Fh2>\n\u003Cp>SENNUO offers many common oilfield thread connections for reversing subs and reversing spears, including \u003Cstrong>NC31, NC38, NC40, NC46, NC50, NC56, NC61, 2 7\u002F8 NU, 2 7\u002F8 EU, 3 1\u002F2 EU, 4 1\u002F2 FH, 5 1\u002F2 FH, 6 5\u002F8 REG, 6 5\u002F8 FH, and 7 5\u002F8 REG\u003C\u002Fstrong>. These options help match different drill strings, fishing tools, and stuck fish conditions.\u003C\u002Fp>\n\u003Ch2>7. What thread direction options are available?\u003C\u002Fh2>\n\u003Cp>SENNUO supplies reversing subs with \u003Cstrong>LH\u002FRH, RH\u002FLH, and RH\u002FRH\u003C\u002Fstrong> thread configurations. Operators can choose the correct thread direction according to the fishing plan, drill string design, catch thread requirement, and downhole reversing method. The right thread direction helps improve torque transfer and fishing operation safety.\u003C\u002Fp>\n\u003Ch2>8. How do I choose the right reversing sub model?\u003C\u002Fh2>\n\u003Cp>To choose the right model, confirm the fish type, wellbore size, tool O.D., tool I.D., thread connection, catch thread, thread direction, and downhole condition. You should also check the operation type, such as drilling, workover, tubing fishing, drill pipe fishing, or well intervention. SENNUO can recommend a suitable option based on your fishing program.\u003C\u002Fp>\n\u003Ch2>9. Can SENNUO provide custom reversing subs?\u003C\u002Fh2>\n\u003Cp>Yes. SENNUO can provide custom reversing subs for special oilfield fishing requirements. Customers can send the required O.D., I.D., thread connection, catch thread, thread direction, drawing, fish type, and well condition. Our team can help match or customize the tool for drilling contractors, oilfield service companies, and equipment distributors.\u003C\u002Fp>\n\u003Ch2>10. What oilfield operations need a reversing sub?\u003C\u002Fh2>\n\u003Cp>This tool suits many oil and gas well operations, including stuck drill stem recovery, stuck pipe treatment, drill pipe fishing, tubing fishing, workover fishing, drill stem back-off, downhole tool retrieval, and well intervention. It gives the crew a reliable way to apply reverse torque during difficult fishing operations.\u003C\u002Fp>\n\u003Ch2>11. What happens if the fish cannot reverse successfully?\u003C\u002Fh2>\n\u003Cp>If the fish remains stuck and the reversing operation cannot continue, the operator can release from the tool and pull the fishing drill assembly out of the wellbore. This function helps protect the fishing assembly, reduce the chance of further tool loss, and lower operation risk in complex oilfield fishing jobs.\u003C\u002Fp>\n\u003Ch2>12. Why choose SENNUO as your reversing sub manufacturer and supplier?\u003C\u002Fh2>\n\u003Cp>SENNUO supplies reversing subs, reversing spears, and other oilfield fishing tools for drilling and workover operations. We offer multiple standard models, common oilfield thread connections, custom manufacturing support, and technical guidance for model selection. Our tools help customers improve stuck pipe recovery efficiency, reduce downtime, and handle demanding downhole fishing conditions.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>E-Mail:\u003C\u002Fstrong>\u003Cbr\u002F>\n\u003Cstrong>info@sennuo.com\u003C\u002Fstrong>\u003C\u002Fp>","html","2026-10-17 18:09:41","","SENNUO Reversing Sub, also called a reversing spear , is a downhole fishing tool for stuck drill stem recovery, stuck pipe treatment, and fish retrieval in oil an",{},[8,27,23],{"list":170,"page":5,"size":59,"total":210},[171,179,187,195,203],{"id":172,"typeCode":157,"slug":173,"title":174,"summary":175,"cover":176,"publishTime":177,"isTop":21,"isRecommend":21,"data":178},656,"truck-mounted-coiled-tubing-unit","Truck Mounted Coiled Tubing Unit for Well Intervention, Wellbore Cleanout and Rigless Workover","SENNUO supplies Truck Mounted Coiled Tubing Units for onshore oil and gas well intervention, wellbore cleanout, nitrogen lifting, gas-well unloading, acidizing, fluid circulation, sand and proppant removal, scale treatment, milling, fishing and rigless workover operations. A complete Truck Mounted…","\u002Fuploads\u002F1\u002F2026\u002F10\u002Ffa9534f2f83642648f01d9ecc3ba1e16.jpg","2026-10-17 18:10:51",{},{"id":180,"typeCode":157,"slug":181,"title":182,"summary":183,"cover":184,"publishTime":185,"isTop":21,"isRecommend":21,"data":186},655,"sterzhen-api-sucker","Стержень API Sucker","Описание сосунка стержня,","\u002Fuploads\u002F1\u002F2026\u002F10\u002Feb7d1b2ca8f74ac693bda9e973e5dc0e.png","2026-10-17 18:10:49",{},{"id":188,"typeCode":157,"slug":189,"title":190,"summary":191,"cover":192,"publishTime":193,"isTop":21,"isRecommend":21,"data":194},654,"straight-integral-blade-stabilizer","Straight Integral Blade Stabilizer","SENNUO Straight Integral Blade Stabilizer is a one-piece oilfield drilling stabilizer designed for petroleum drilling, oil and gas well drilling, directional drilling, horizontal drilling and bottom hole assembly control. It helps centralize the drill string, reduce downhole vibration, control well…","\u002Fuploads\u002F1\u002F2026\u002F10\u002F02fb34327f0a4b64bf9015ffc10a3580.png","2026-10-17 18:10:44",{},{"id":196,"typeCode":157,"slug":197,"title":198,"summary":199,"cover":200,"publishTime":201,"isTop":21,"isRecommend":21,"data":202},653,"spiral-integral-blade-stabilizer","Spiral Integral Blade Stabilizer","SENNUO Spiral Integral Blade Stabilizer is a one-piece downhole drilling stabilizer for petroleum drilling, oil and gas well construction, directional wells, horizontal wells and high-deviation drilling programs. It improves BHA stability, supports wellbore trajectory control, reduces drill string…","\u002Fuploads\u002F1\u002F2026\u002F10\u002Fc0fdd51080dd4c78944d0bf1ffa979df.jpg","2026-10-17 18:10:43",{},{"id":204,"typeCode":157,"slug":205,"title":206,"summary":207,"cover":208,"publishTime":201,"isTop":21,"isRecommend":21,"data":209},651,"rotary-kelly-drill-pipe","Rotary Kelly Drill Pipe","SENNUO supplies high-strength Rotary Kelly Drill Pipe for oilfield drilling rigs, petroleum exploration wells, production wells and workover operations. The kelly works as the main drive member in the drill string. It transfers torque from the rotary table through the drill string and helps drive the…","\u002Fuploads\u002F1\u002F2026\u002F10\u002Fc12bad1c59814b88b7fe44807f7cea5c.jpg",{},256]