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Jet Research Center 

Drill Collar Severing Tool 

P/N 101293224 Rev. K 

                                                                                          

 

 

 

Page 1 of 20 

Jet Research Center, 8432 South I-35W, Alvarado, Texas, 76009-9775, USA 

Telephone 1-817-761-2000; Toll Free 1-800-451-5403; Fax 1-817-783-5812; Website www.jetresearch.com 

 

Jet Research Center 

Drill Collar Severing Tool (DCST) 

Field Loading Procedures 

 

 

 

WARNING 

 

Refer to and apply the procedures listed in the 

Recommended 

Practices  for  Oilfield  Explosives Safety; API Recommended 
Practice 67 (RP67)

 before assembling or using this product. 

 
Explosives are by nature destructive. If mishandled or misused, 
the  outcome  may  be  immediate  and  disastrous,  and  may result 
in  serious  injury  or  death.  Do  not  attempt  to  use  this  product 
unless  you  have  received  training  in  the  handling  and  use  of 
oilfield  explosive  products.  The  following  Field  Loading 
Procedures  must  be  explicitly  followed  without  attempts  to 
shortcut,  alter,  switch  or  otherwise  deviate  in  any  way,  or  use 
alternate  parts  from  those  intended  to  be  supplied  by  Jet 
Research Center for such field assembly. 
 

Use Utmost Care! 

 

JRC  warrants  only  title  to  the  equipment,  products,  materials,  and  supplies  and  that  the  same  are  free  from 
defects  in  workmanship  and  materials.

  THERE  ARE  NO  WARRANTIES,  EXPRESS  OR  IMPLIED,  OF 

MERCHANTABILITY,  FITNESS  OR  OTHERWISE  WHICH  EXTEND  BEYOND  THOSE  STATED  IN  THE 
IMMEDIATELY  PRECEDING  SENTENCE.

 

JRC’s  liability  and  Customer’s exclusive remedy in any cause of 

action (whether in contract, tort, breach of warranty or otherwise) arising out of the sale or use of any products, 
supplies  or  materials  is  expressly  limited  to the  replacement  of  such  products,  supplies  or  materials  on  their 
return to JRC or, at JRC’s option, to the allowance to be Customer of credit for the cost of such items. In no 
event shall JRC be liable for special, incidental, indirect, punitive, or consequential damages.

 

Содержание DCST

Страница 1: ...dures must be explicitly followed without attempts to shortcut alter switch or otherwise deviate in any way or use alternate parts from those intended to be supplied by Jet Research Center for such field assembly Use Utmost Care JRC warrants only title to the equipment products materials and supplies and that the same are free from defects in workmanship and materials THERE ARE NO WARRANTIES EXPRE...

Страница 2: ...research com This Field Loading Procedure should be followed in conjunction with the assembly and application of the following listed Jet Research Center Drill Collar Severing Tools 1 3 8 in OD 35 1 mm HMX 1 3 8 in OD 35 1 mm HNS 1 3 4 in OD 44 5 mm HMX 1 3 4 in OD 44 5 mm HNS 2 in OD 50 8 mm HMX 2 in OD 50 8 mm HNS 2 5 8 in OD 66 5 mm HMX 2 5 8 in OD 66 5 mm HNS 2 1 8in OD 54mm High Pressure HMX ...

Страница 3: ... with Electric Detonators 15 Section 6 Disarming and Disassembly Procedures with Electric Detonators 19 Section 7 Parts List and Assembly Diagrams 20 List of Tables Table 1 Drill Collar Severing Tools 6 Table 2 Required Assembly Tools List 9 Table 2b Required Hardware and Explosive Material List 10 Table 3 Required Parts List 16 Table 4 Drill Collar Severing Tools Parts List 20 List of Figures Fig...

Страница 4: ... Load only in designated areas Floors are to be covered with rubber mats No open flames welding or sparking devices are to be used in the loading area while handling explosives No smoking in the loading area while handling explosives No RF transmitting devices such as cellular telephones two way pagers or hand held radios are to be in the loading area Never strike drop force heat grind drill or ha...

Страница 5: ... grounded A shunt plug maintains the system electrically shorted during assembly as the detonator shunt wire is removed A protective holder encompasses the detonator shielding the Explosive Supervisor while the electrical connection is made to the CCL The DCST uses Resistorized detonators minimizing the chance of an accidental firing The DCST can also be initiated using a Top Fire RED detonator pr...

Страница 6: ...wellbore restrictions when shooting in open hole In the case of severing tool operations the main objective is to shoot the pipe in open hole to free the pipe Since the DCST is typically the cutter of last resort for recovery operations a successful cut is more important than if the recovered pipe is flared split or otherwise damaged For maximum efficiency the best option when the DCST is used for...

Страница 7: ... any cutter so the cut is made at the proper depth The tool will not free the string if initiated below or at the stuck section of pipe If possible tension should be applied to the drill string prior to tool initiation in order to increase the likelihood of severance The amount of over pull to be applied above string weight at the desired cut depth should be determined by the drilling representati...

Страница 8: ...age 8 of 20 Jet Research Center 8432 South I 35W Alvarado Texas 76009 9775 USA Telephone 1 817 761 2000 Toll Free 1 800 451 5403 Fax 1 817 783 5812 Website www jetresearch com Figure 2 Example of subsequent successful cut attempt directly across drill collar connection ...

Страница 9: ...ay current or a Top Fire RED detonator that provides additional safety enhancements when compared to conventional Resistorized detonators All previously established safety rules and regulations should be maintained during the assembly of explosives 4 2 Required Materials Item No Description Part No 1 Approved Blasters Multimeter 100009455 2 Set of Allen Wrench Standard Sizes 1 16 to 3 8 120143111 ...

Страница 10: ...ely 1 3 4 101293167 101293207 101292915 15 000 100158288 in kit 100008258 in kit 100000434 order separately 101293676 order separately 20 000 101293169 order separately 101293227 order separately 100000434 order separately 101293230 order separately 2 101293168 101293234 101292956 15 000 100157816 in kit 100008258 in kit 100000434 order separately 101293676 order separately 20 000 101293187 order ...

Страница 11: ...emaining pellets on the MDF tube Make sure there are an equal number of pellets on each side of the cartridges 4 3 6 Slide MDF Assembly tube through the center hole of the end clamp Hand tighten the Set Screw 7 to secure the end clamp to the tube At this time the explosive column should be tightly held with no play or movement between the base of the MDF and the end clamp Detail B Drawing D0005180...

Страница 12: ...inst the spacer spring 4 3 12 Install greased O Ring s 3 on DCST Adapter 2 Insert the adapter into the loaded carrier tube by using Loading Tool 18 4 3 13 Position and tighten the first two 2 Cap Screws 4 Remove the Loading Tool and insert remaining Cap Screws 4 3 14 Install proper RED Adapter if running RED Top Fire into the DCST Adapter as required by detonator reference Table 2b 4 3 15 The Expl...

Страница 13: ...hodic protection The Drill Collar Severing Tool may use a resistorized detonator which reduces the possibility of accidental firing by stray current or a Top Fire RED detonator that provides additional safety enhancements when compared to conventional resistorized detonators Note that each detonator requires the use of a different adapter sub item 17 All previously established safety rules and reg...

Страница 14: ...101293230 order separately 2 1 8 26 000 101539987 in kit 100157532 in kit Not Required if using 102273068 Table 3 Electrical hardware components 5 3 Check o rings size 214 on all parts listed making sure there are no cuts nicks or scratches install and replace as necessary Lubricate o rings and male threads only with a thin coating of clean downhole grease 5 4 Make up the firing head to the extens...

Страница 15: ...adapter 11 for the detonator assembly being used Refer to Table 3 for appropriate parts 5 12 Make up the protective holder 17 hand tight to the adapter extension mandrel and detonator assembly Wrench tighten the firing head extension mandrel and adapter The shunt plug and protective holder remain hand tight 5 13 Remove the shunt plug 5 14 Check the firing head extension mandrel detonator assembly ...

Страница 16: ...200 feet 70 m below ground on land or 200 feet 70 m below the seabed offshore 5 20 After Attempting to make the cut even if there are good indications that the DCST functioned it is still necessary to go back into SAFE and Radio Silence when coming out of the hole while still 200 feet 70 m below ground level on land or 200 feet 70 m below the seabed offshore Check that the grounding lines are stil...

Страница 17: ...70 m below the ground level on land or 200 feet 70 m below the sea bed offshore ensure that cable is in the SAFE position grounding lines are attached If required Radio Silence is in place and that the disassembly and disarming area is clear of non essential personnel 6 2 Remove the DCST from the adapter 11 while monitoring the disassembly for indications of trapped pressure 6 3 Install the protec...

Страница 18: ...0432 100000432 100000432 14 MDF Assembly 100118417 1 100118417 1 100118417 1 100118417 1 100118417 1 15 Explosive Kit consisting of 101214053 1 101293167 1 101293168 1 101293152 1 101293168 1 15 1 Pellets HMX 100118418 28 100015145 44 100118425 64 101293160 110 100118425 64 15 2 Cartridges HMX 100118419 2 100015146 2 100118426 2 101293161 2 100118426 2 15A Explosive Kit consisting of 101237459 1 1...

Страница 19: ...ring Tool P N 101293224 Rev J Page 19 of 20 Jet Research Center 8432 South I 35W Alvarado Texas 76009 9775 USA Telephone 1 817 761 2000 Toll Free 1 800 451 5403 Fax 1 817 783 5812 Website www jetresearch com Figure 3 DCST Assembly Drawing ...

Страница 20: ... Tool P N 101293224 Rev J Page 20 of 20 Jet Research Center 8432 South I 35W Alvarado Texas 76009 9775 USA Telephone 1 817 761 2000 Toll Free 1 800 451 5403 Fax 1 817 783 5812 Website www jetresearch com Figure 4 2 1 8 HP DCST Assembly Drawing ...

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