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  • Name: Thermal External Casing Packer
  • ID: 21009
  • Views : 117

Application introduction to R-GFY thermal staged-completion external casing packer for horizontal wells
In recent years, we have carried out an investigation on the problems of screen-pipe non-cementing completion for horizontal well. It is concluded that the main reason for oil/gas well shut-in is that after oil/gas reservoirs are flooded at early stage, workover operations can not be conducted, which results in reduced service lives of oil/gas wells. To solve this problem, we developed R-GFY external casing packer used for screen-pipe non-cementing completion for thermal horizontal wells. R-GFY external casing packer can prevent the channeling among oil, gas and water layers effectively after isolation, so it can lengthen the service lives of oil/gas wells.
R-GFY thermal staged-completion external casing packers for horizontal wells are not only used in staged completion in horizontal wells, but also widely used in liner non-cementing completion, sidetracking wells and secondary completion operations.
Structure diagram of R-GFY thermal staged-completion external casing packer for horizontal wells

Upper conncetion
Thrust mechanism
Upper and lower sealing elements
Lower connection
Working principle of R-GFY thermal staged-completion external casing packer for horizontal wells
Connect R-GFY thermal external casing packer to the liner, and then run them in hole together to the design depth. When steam injection temperature reaches 150°C, the expanding material in R-GFY thermal external casing packer starts to expand, which makes the thrust mechanism of the external casing packer generate an axial thrust large enough to push the upper and lower sealing elements and make them deform, so as to block the annulus between casing and borehole, and then isolate the annulus above R-GFY thermal external casing packer from the annulus below it. Therefore, it can prevent the channeling among oil, gas and water layers effectively.
Basic parameters and dimensions of R-GFY thermal staged-completion external casing packer for horizontal wells 


Specification and model


Max. OD


Drift diameter


Packing element length


Steel grade

Effective length


Applicable hole diameter

73

102

62

3000

N80

4600

109~218

89

114

76

3000

N80

4600

121~244

102

133

89

3000

N80

4650

141~286

114

146

97

3000

N80

4650

155~313

127- I

148

08

3000

N80

4700

157~318

127- II

148

108

4000

N80

5700

157~318

127- III

148

108

5000

N80

6700

157~318

140- I

178
190

121

3000

P110

4700

188~408

140- II

178
190

121

4000

P110

5700

188~408

140- III

178
190

121

5000

P110

6700

188~408

178- I

206

159

3000

P110

4800

216~438

178- II

206

159

4000

P110

5800

216~438

178- III

206

159

5000

P110

6800

216~438

245

286

221

5000

P110

6800

303~613

Material performance of R-GFY thermal staged-completion external casing packer for horizontal wells Select TP100H as the material of base pipe, nipple joint and coupling.
Connection thread: buttress thread
Material of O-ring: fluoro-rubber with heat resistance of 280°C
High-temperature packing element: F4 composite material with heat resistance of 300-360°C
Setting temperature of the packing element: over 200°C
Setting time of the packing element: 2 hours
Applied standard for processing: SY/T6222-2012
Operating process of R-GFY thermal staged-completion external casing packer for horizontal wells
Making a wiper trip
It is required that the length and OD of the drift size gauge tool exceed or equal to those of R-GFY external casing packer.
RIH R-GFY external casing packer and completion string
Connect R-GFY external casing packer to the completion string as per design, and then RIH to the design depth. During the running process, R-GFY external casing packer shall be protected with rolling centralizers on both ends.

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