常用封隔器（Common packer）.docVIP

常用封隔器（Common packer） Commonly used downhole fracturing downhole tools released Reduces font size and font size Downhole common fracturing underground tools Classification of underground tool for fracture construction ? packer ? Control class tool The first part of  packer 1. Type K344 packer 1  role  in the packer is suitable for deep well of layer, any one layer or layers of fracturing and acidizing treatment  can form a partial pressure layers of pressure The pipe column of the split pipe column and the acid construction of multi-layer. 2  structure It mainly has the upper joint, the rubber tube seat, the rubber tube, the center tube, the O type rubber ring, the filter net, the lower joint, etc.  as shown in figure 1.  FIG. 1 K344 packer structure diagram Working principle of the 3  Packer down into the mine design depth after  from inside the tubing hydraulic  high pressure fluid through the hole and center of the screen, under the joint pipe sink in The inner cavity of the cylinder. The pressure of this pressure is greater than that of oil and casing. In this under the action of pressure difference  glue tube swell the oil Casing annular space closed. Only when the unlock drain off the oil pipe in the high-pressure  oil tubing and casing annulus pressure balance  glue tube by itself The elasticity of the force can be unsealed. Four  K344-115 packer main technical parameters of   are shown in table 1 Table 1. Main technical parameters of k344-115 The largest diameter  phi 115 mm The minimum size  phi 55 mm  length 926 mm Setting pressure  0.5 ~ 1.5 MPa Working pressure  35 MPa  working temperature 90 ℃ 2. Type Y344 packer 1  role  the packer is mainly used for layered fracturing, layering, acidification, and implement certain technical purpose for the formation of the packer operation. 2  structure It mainly has upper joint, pressure cap, trapezoid root, center tube, liner, rubber tube, ring ring, lower glue tube seat, upper piston, uppe