초록 ▼

A dual string well tree isolation apparatus includes two assemblies each having a high pressure valve and a high pressure tubing which are respectively inserted into the vertical passage of a dual string well tree, and a swedge for connection to the dual string well tree for supporting one of the as

A dual string well tree isolation apparatus includes two assemblies each having a high pressure valve and a high pressure tubing which are respectively inserted into the vertical passage of a dual string well tree, and a swedge for connection to the dual string well tree for supporting one of the assemblies. The swedge vertically offsets one assembly from the other. The apparatus further includes a hydraulic cylinder for inserting the high pressure tubings and cylinder support rods for removable attachment of the hydraulic cylinder to the dual string well tree. The hydraulic cylinder and the support rods are removed after each insertion of a high pressure tubing into a respective vertical passage to provide easy access to the high pressure valve of each assembly. The advantage is a safe, economical apparatus for simultaneous stimulation of a dual string well completion.

대표청구항 ▼

[ I claim:] [1.] An apparatus for injecting fluids, gases, solid particles or mixtures thereof into a well having first and second production tubing strings, the fluids being injected through a dual string well tree which has first and second vertical passages therethrough respectively aligned with

[ I claim:] [1.] An apparatus for injecting fluids, gases, solid particles or mixtures thereof into a well having first and second production tubing strings, the fluids being injected through a dual string well tree which has first and second vertical passages therethrough respectively aligned with the first and second production tubing string and has at least one valve for selectively closing each passage, the apparatus comprising:a first and a second isolation assembly, each having a high pressure tubing for insertion through the respective first and second vertical passages to isolate the fluids, gases, solid particles or mixtures injected therethrough from an interior of each of the vertical passages;a swedge having an axial passage adapted to be detachably mounted to the dual string well tree in sealed alignment with one of the vertical passages, the swedge having a top end adapted to support one of the assemblies to vertically offset the one assembly from the other.