Novel bumping-and-pressing-type float collar

Abstract

The invention provides a novel bumping-and-pressing-type float collar. The novel bumping-and-pressing-type float collar comprises a float collar body, wherein a bumping-and-pressing sealing seat body, a sealing insertion head, a sealing insertion head core rod, a flow-passing plate and a spring are arranged in an inner cavity of the float collar body from bottom up; the flow-passing plate is arranged on the middle part of the inner cavity of the float collar body, and the sealing insertion head core rod penetrates through the central hole of the flow-passing plate; the spring sleeves the sealing insertion head core rod, and the bottom part of the sealing insertion head core rod is fixedly connected with the top part of the sealing insertion head; the bumping-and-pressing seat body is arranged at the bottom part of the inner cavity of the float collar body; the sealing insertion head moves downwards along with the contraction of the spring; and the bottom part of the sealing insertion head is inserted into the cavity of the bumping-and-pressing sealing seat body. The novel bumping-and-pressing-type float collar has the following advantages: the sealing insertion head core rod, the sealing insertion head and the bumping-and-pressing sealing seat body are all of metal structures, so that the problem that a traditional float collar is not high-temperature-resistant and is not erosion-resistant is solved.

Description

technical field [0001] The invention belongs to the technical field of cementing tools in the petroleum drilling industry, and in particular relates to a novel bumper type floating hoop, which plays a very positive role in improving cementing quality and operation safety. Background technique [0002] In the oil drilling industry, cementing is an important link, and the tool accessories used in the cementing process ensure the quality of cementing. Sometimes when performing cementing operations, the existing tools are difficult to meet the needs of cementing, and even cause the failure of the entire project. In order to ensure the cementing quality of these complex wells and meet the needs of the cementing site, corresponding cementing tools are needed. [0003] The basic function of the floating hoop for cementing is to prevent the cement slurry from flowing back during cement injection. It is used to control the downward position of the rubber plug when injecting cement,...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the floating hoop is sealed by metal and nylon, which has disadvantages such as poor sealing effect, low pressure bearing capacity, no erosion resistance, no high temperature resistance, poor sealing and drillability, and inconvenient connection; And the existing floating hoop spool is closed only by the spring to push and reset, which has low reliability

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