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Subsurface Control Valve (SSC) Storm Vavle

Product Number: 171212

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Subsurface Control Valve (SSC)
The subsurface control valve (SSC) is a combination valve and backoff joint used to close in a well being drilled without the drillpipe being pulled. This capability is especially useful in offshore operations when storms are expected or when surface equipmentmust be repaired. The valve helps eliminate the hazard of leaving pipe standing in the derrick during a stormand saves time.
Usually a hookwall packer, such as the RTTS® packer, is used with the SSC valve to support the drillpipe weight. The packer seals inside the casing (surface pipe or intermediate casing string), and the SSC valve seals the drillpipe ID. Because the SSC valve includes a backoff connection, the drillpipe above it can be removed and reconnected when operations resume. 
When the tool is operated from a floater-type rig, a bumper sub or slip joint should be inserted in the drillpipe above the SSC valve.
Features and Benefits
• Saves rig time
• Operates easily
• Tests wireline valves during drilling operation
For temporary abandonment, the drill bit is pulled up into a stabilized hole or casing. An RTTS packer with an SSC valve is then installed on the drillpipe.
The toolstring is then run into the hole until the RTTS packer and SSC valve have sufficient drillpipe weight below the RTTS packer to set the packer elements and a sufficient depth is reached (below the mud line for storm abandonment). The packer is set.
The drillpipe is rotated to the left to release the seal mandrel from the SSC valve. (The weight of the pipe above the SSC must be suported from the surface while rotating.) This procedure closes the SSC valve.
After the valve is closed, the separated drillpipe can be removed from the well, and the wireline valves can be closed for temporary well abandonment.

kw-2 Storm Vavle 
The storm vavle is a combination Back Pressure Vavle and Safety Joint that is run above a KWWELL Storm Packer, in order to provide well control protection during a temporary abandonment of the well, without having to pull the drill pipe. The Storm Vavle allows the pxckers to be set and then permit disconnection and retrieval of the drill pipe and the upper sub of the vavle, while at the same time automatically closing the Storm Vavle, isolating the drill pipe below the Storm Packer.
Can be easily runned by rotating the tubing string which can open and close the vavle.
In emergency situation, the plug can open drill pipe passage.
It is designed to be used with right hand set compression type packers only.
Part NO Casing Gage Ring
Tool max.
Tool min
Threads Box up/pin down
605-103 7 5/8" 054KW-5605-144 6.125 1.750 4 1/2-I.F.
  8 5/8" 054KW-5605-145 7.000    
  9 5/8" 054KW-5605-146 8.000    
  13 3/8" 054KW-5605-147 11.750    
605-104 7" 054KW-5605-143 5.500 1.750 3 1/2-I.F.
  7 5/8" 054KW-5605-144 6.125    
  8 5/8" 054KW-5605-145 7.000    
  9 5/8" 054KW-5605-146 8.000    
  13 3/8" 054-5605-147 11.750    
605-105 5 1/2" NA 3.720 1.000 2 7/8’ EU.

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testing and Quality control &operation training

We kindly offer the free operation training to clients who purchase Yuanheng product.
The training content varies to the different need of the customers. Generally speaking, our customer training mainly includes followings:
1 Contents and purpose:
1)Learn and master the use, working environment, working principles, structure, disassembly, maintenance, requirements of test and operations of the tools fixed in contract(No. GW101), 
2)Basic requirement of designs of tool strings and of testing operation.
3)Brief introduction on the development of DST.
2 Intended effect:
1)Each trainee could describe working principles and structure of tools and could disassembly, maintain and test independently 
2)Known well on the following points: check before use, cautions when using, operations on ground, process of deblocking and pulling up and ground working of disassembly and checking.
3)Aquire general ideas on basic requirement of designs of tool strings and of testing operation 
4)Aquire general ideas on DST development.
3 Training effect test
After training, we will arrange theory and site operation test. The qualified trainees will acquire the qualification certificate issued by  
Quality control of the raw material:
1)The selection of the raw material supplier:our raw materials mainly include alloy structural steel, stainless steel, non-ferrous metal alloy and high nickel alloy, etc, in the selection of the raw  material suppliers, we would do the comprehensive assessment of the supplier strictly according to technical requirements .Most of our suppliers are the leading enterprises of the steel production in China , such as the DAYE SPECIAL STEEL CO., LTD , XI NING SPECIAL STEEL CO.,LTD etc. While the special alloy are usually purchased from abroad to ensure a higher mechanical properties.
2) The acceptance & Inspection of the raw material:
Ultrasonic flaw detection for every piece of the steel.
Chemical composition analysis, for every piece of the steel.
Mechanical performance test for every piece of the steel.
Only the above three items are qualified can the raw material be printed qualified logo and accepted as the qualified raw materials.
2、Quality control of the seals:
1) O Rings: 100% visual and dimensional inspection for every piece of the O-rings ,15% spot check for the size and hardness test of the o rings. As for the sealing and heat resistance properties of the o rings, we designed a special test device which is equipped with a heating insulation equipment that can simulate the downhole temperature and pressure. At present, our fluorine can keep a good performance  in the condition of 210 ℃, and 105 Mpa work pressure (maximum pressure ever reached 146).
2) Back-up ring: 100% visual and dimensional inspection for every piece of the back-up ring, As for the test of the sealing and heat resistance, we design and manufacture the special test device, equipped with heating insulation equipment to stimulate the downhole temperature and pressure for acceptance. At present, our company's high pressure back-up seal  can keep good sealing performance and deformed a little in the condition of 210 ℃, and 105Mpa work pressure (maximum pressure ever reached 146). It can be used for many times.
3. Quality control of the spring: Apart from the conventional test of the raw material and size of the different springs that used in the tools, we specially designed a test device that equipped with a heating preservation equipment to stimulate the downhole temperature and condition to test the spring performance.
4. Quality control of the spare parts processing:
1) Spare parts processing control:In strict accordance with the process and traceability requirements, a test, mark and record of dimension, geometric tolerance and for every piece and every procedure will be conduct.
2) Heat treatment quality control: We have two high temperature heat treatment furnaces that are mainly used for stainless steel and other special material heat treatment. For other materials, we entrust Baoji Petroleum Machinery Company Heat Treatment Plant to do the heat treatment.   For the inspection of the heat treatment, we are equipped with the special inspection machine such as gantry hardness tester, digital universal tensile tester etc.;
5. Quality control of the tool assembly and testing process
1) Test equipment: in addition to the conventional hydraulic test pump, tensile testing machine, we also have a pressure sensor and data acquisition system which can accurate and clear record each step of the test.
2) Technical documents: We have a test acceptance list for every tool test that clearly guides the each step of the test.
3) Assembly test: A special inspector will supervise the whole assembly process. 

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