Cased Hole Full Bore Retrievable Safety Joint for Drill Stem Testing
Introudction of Safety Joint
The Retrievable safety joint is an optional emergency backoff equipment in oil & gas well testing operation and TCP operation. If the packer becomes stuck during operations, the safety joint releases the workstring and tools above the packer. To initiate release of the safety joint, a tension sleeve must be parted by pulling on the tubing. However, this action alone is not sufficient to release the joint but must be followed by application of vertical and rotational movement for complete release of the safety joint.
Working principle and structure features.
A mandrel in the safety joint is held inoperative by a tension sleeve to help prevent premature releasing of the joint. To release the safety joint in an emergency, the tension sleeve must be parted before the joint can be operated. When the tension sleeve has been parted by pulling on the tubing, the safety joint may be completely release by holding right hand torque on the tubing while working it up and down.
4 1/2”-5”, 5 1/2” RTTS safety joint can unhitch upon two rotations of the tubing. One revolution needs two strokes. 7″RTTS Safety Joint require two strokes and 9 5/8” need three. It is about twelve revolutions for complete release of the7” and 9 5/8” RTTS safety joint.
Technical parameter of 5 1/2" RTTS Safety Joint
| NO | Specifications | 51/2″RTTSSAFETY JOINT 70MPa H2S 400℉ | 51/2″RTTSSAFETY JOINT 70MPa INNER H2S&ACID 400°F |
| 1 | MAX OD(mm) | 105.5mm/4.15in | 105.5mm/4.15in |
| 2 | ID(mm) | 50.5mm/1.99in | 50.5mm/1.99in |
| 3 | Total Length(mm) | 1140.5mm/44.9in (1060.5mm/41.75in) | 1154mm/45.43in |
| 4 | Tensile Strength (yield) | 752.7 KN (170000LBS) | 1166KN (262000LBS) |
| 5 | Working pressure | 70 MPa/10000PSI | 70 MPa/10000PSI |
| 6 | Internal Pressure Strength | 89.3 MPa/12700 PSI | 115 MPa/16400 PSI |
| 7 | External Pressure Strength | 105 MPa/15000 PSI | 106 MPa/15100 PSI |
| 8 | Torque Strength (yield) | 89±4.5KN (20000LBS) | 89±4.5KN (20000LBS) |
| 9 | Service Temperature | -40℉～250℉ | -40℉～250℉ |
| -20℉～400℉ | -20℉～400℉ |
| 10 | Connections | 2 7/8"CAS.B×P | 2 7/8"CAS.B×P |
| 2 7/8"EUE.B×P |
| 11 | Service Environment | H2S, Qualified with NACE MR0175-2002 | H2S&ACID, Qualified with NACE MR0175-200 |
About ZZ TOP OIL TOOLS - TECHCORE
ZZ TOP Oil Tools Co., Ltd, headquartered in Xi’an City, focused on the design and production of drill stem testing tools and wellhead equipment since 2010. With the business expanding, ZZ TOP Oil Tools jointed to build the factories for wellhead equipment under the brand " JC Wellhead" and downhole tools under the brand "Techcore".
* "JC Wellhead" was estabilished in 2010 in Yancheng city, specialized in design and manufacturing of the oilfield wellhead equipment conformed with API 6A specification.
* "Techcore Oil Tools" was re-built in 2016 in Baoji city, specialized in design and manufacturing of drill stem testing tools, coiled tubing tools, wireline tools and other downhole tools.
ZZ TOP Oil Tools can also support client with One-Stop Procurement Service and flexible payment term under short or long term financing service. We always believe that the success of our company is directly related to our strict quality control and professional service. From the raw material booking till finished products, the inspector will be appointed to supervise the whole processing. We always provide clients with innovative solutions, quality materials and timely delivery.
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