|Application:||Drill Stem Testing||Type:||Retrievable Type|
|Working Condition:||H2S Service Above 175oF||Working Temperature:||Max. To 450 OF|
|Working Pressure:||10000psi||Standard:||NACE MR0175|
|Tool Size:||7 Inch||Connection:||IF Box X Pin|
open hole packer,
Well Testing Cased Hole Mechanical Packer Full Bore DST Safety Joint 7" 70Mpa
Introudction of Safety Joint
The Retrievable safety joint is the full bore safety join which is applied for the drill stem testing operation in well testing operation, and it is named RTTS afety joint in Halliburton type.
The Retrievable safety joint is an optional emergency backoff equipment. If the packer becomes stuck during operations, the safety joint releases the workstring and tools above the packer.
The tension sleeve of the safety joint must be parted by pulling on the workstring, in order to initiate the release of the safety joint. For complete release, vertical and rotational movement must be applied.
The Retrievable Safety Joint should be run on all special tool and DST jobs directly above the packer. The safety joint is aimed to provide a disconnect point in the DST tool string above the packer, in order to remove all equipment above that point once the work string becomes stuck and the Safety Joint can still be operated.
Operation of the retrievable safety joint
The retrievable safety joint is run immediately above the retrievable packer so that the number of tools above the packer can be removed. Before the safety joint is run in the hole, a tension sleeve located on the bottom of the lug mandrel must first be parted by pulling up on the tool string.
After the tension sleeve has parted, by right-hand torque the safety joint is released while the workstring is rotated a specified number of cycles. 12 cycles will be needed for 7” RTTS safety joint total released. And for 7” RTTS safety joint, it require two strokes per revolution for 7” RTTS safety joint.
Application of the Retrievable Safety Joint
* Cased Hole Drill stem testing Operation
* Tubing - converyed perforating operation - TCP operation
* Well Completion operations
Features and Benefits of the Retrievable Safety Joint
* Positive sequence of operation helps prevent premature release.
* The DST tool string above the safety joint can be retrieved when string is stuck.
Technical parameter of the retrievable safety joint
|No.||Specification||7”- 7 5/8" RTTS Safety Joint|
|5||Internal Pressure strength||132MPa|
|6||External Pressure strength||123MPa|
|9||Service||H2S,As per NACE MR-0175(>175°F)|
|10||Tension sleeve Rating||116+-10 kN|
|12||Top and bottom Connection||3 1/2IF. BXP|
Well Testing RTTS Safety Joint Cased Hole Drill Stem Testing Tools 7" - 70Mpa
Contact Person: Lee