The K344 steel frame expansion packer is set and unsealed in such a way that no mechanical movement is required during operation. Therefore, there are advantages to operating in horizontal and inclined Wells. It is applied to the construction technology of oil field such as stratified water injection, stratified acidification, stratified plugging, stratified fracturing and drag fracturing.
Working Principle
The K344 steel skeleton packer is composed of six parts: lower joint, floating head, rubber barrel, center pipe, liquid inlet hole and upper joint. The rubber barrel is a three-layer structural rubber barrel with high elastic and high strength stainless steel belt as the skeleton layer.
K344 is a hydraulic expansion packer, mounted, hydraulically set, hydraulically unsealed. The oil and casing ring space is sealed by expanding the rubber cylinder outwards.
Specifications
| Type | Length ±5mm | Max OD of cylinder mm | Min  NDof cylinder mm | Sealing differential pressure Mpa | Worktemperature ℃ | Work pressure Mpa | Thread connection | Suitable casing mm |
| K344-56 | 1050 | 56 | 12 | ＞5 | 120-150 | 7-15 | 1 1/2″TBG | 5 1/2″/7″ |
| K344-70 | 1050 | 70 | 26 | ＞5 | 120-150 | 25-30 | 1 1/2″TBG | 5 1/2″/7″ |
| K344-80 | 1430/1740 | 80 | 36 | ＞5 | 120-150 | 50-75 | 2 3/8″TBG | 88—110 |
| K344-90 | 1430/1740 | 90 | 36 | ＞5 | 120-150 | 50-75 | 2 3/8″TBG | 99—126 |
| K344-99 | 1430/1740 | 99 | 46 | ＞5 | 120-150 | 50-75 | 2 3/8″TBG | 108—128 |
| K344-105 | 1450/1740 | 105 | 46 | ＞5 | 120-150 | 50-75 | 2 7/8″TBG | 114—128 |
| K344-110 | 1750/1670 | 110 | 55 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 118—128 |
| K344-114 | 1750/2030 | 114 | 55 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 122—130 |
| K344-128 | 2030 | 128 | 55 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 136—150 |
| K344-138 | 2030 | 138 | 55 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 150-165 |
| K344-142 | 2050 | 142 | 57 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 150—165 |
| K344-160 | 2050 | 160 | 57 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 165—185 |
| K344-178 | 2050 | 178 | 57 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 185—220 |
| K344-196 | 2050 | 196 | 57 | ＞5 | 120-150 | 50-75 | 2 7/8″UPTBG | 210-220 |
Features
- With large expansion coefficient, large diameter holes can be sealed with small diameter rubber cylinders.
- Easy to expand and contract, that is, easy to seal and unseal.
- Temperature resistance class: 150℃.
- Pressure difference is large.
- The residual deformation is small.
- It has strong adaptability to boreholes and can be used in the technological measures of casing deformation Wells and open hole Wells.
- The liquid inlet channel of the central pipe is replaced by a long slit instead of a round hole.
- Seat seal is reliable.
- Reusable (in formation testing).
