Detailed Product Description

The structure of Open Hole Packer consists of sliding collar, sliding head, setting mandrel, packer rubber, metal cup, support seat and bottom adaptor. As compression load is applied to the packer, the sliding collar moves forward and makes the packer rubber pressurized and expanding, meanwhile the bowl-shaped metal cup is flattened, the flattened OD is 19 more than unflattened one, so that decreases the clearance between holes. As the expanded packer rubber contacts tightly to the hole wall, the flattened metal cup works as a pressure platform, increased the pressure capacity of the packer rubber. When the compression load is removed, the packer rubber returns to shape by its elasticity.

When used together with MFE, the packer must be connected with safety seals to form safety seals packer. That is remove the sliding collar of the packer and nuts of O-ring, and connect with joint sub of the safety seals and oil chamber.

For deep hole testing, always two packers work together as a packer set. If it is an open hole straddle testing, we need to use two sets of packers, the upper one and the lower one. Each set consists of one or two packers. But no matter how many packers are there, there is only one safety seals packer, and it must be placed uppermost, and perform locking function.

The OD of packer rubber is chosen by inner bore of hole, generally speaking, it is favorable to choose a packer rubber 25.4less than the inner bore of hole. Because it is difficult for running when the clearance is too small and it is hard for sealing when it is too big, at the same time, the pressure capacity of the packer rubber decreases.