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Double guide rod forced reset type floating hoop

A reset-type, double-guide rod technology, applied in wellbore/well components, earth-moving drilling, sealing/packing, etc., can solve the problems of sealing surface erosion, sediment deposition, reset in place, etc., and achieve enhanced reliability. The effect of good stability and good anti-erosion effect

Active Publication Date: 2016-09-14
中国石油集团川庆钻探工程有限公司长庆钻井总公司
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Problems solved by technology

[0003] In order to solve the problems of sealing surface erosion, silt deposition, and insufficient reset in the above-mentioned prior art, the present invention provides a double-guide rod forced reset type floating hoop, which has the effect of accurate and sufficient reset and anti-erosion effect of the valve core. Good, there is no sediment around the valve core, the structure is simple, and the seal is reliable

Method used

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  • Double guide rod forced reset type floating hoop
  • Double guide rod forced reset type floating hoop
  • Double guide rod forced reset type floating hoop

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with accompanying drawing:

[0021] combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, the present invention provides a double guide rod forced reset type floating hoop, which includes a casing 1 and a valve core 3, and also includes an upper valve seat 2, a middle valve seat 4, a lower valve seat 5 and a return spring 6, and the valve core 3 is located at Between the upper valve seat 2 and the middle valve seat 4 in the shell 1; the upper valve seat 2 and the middle valve seat 4, the middle valve seat 4 and the lower valve seat 5 are respectively connected by threads, and the upper part of the upper valve seat 2 and the middle valve seat 4 The upper valve seat 2 is provided with an upper valve core support structure 16, and the lower valve seat 5 is provided with a lower valve core support structure 17; the valve core 3 and the upper valve seat 2 are fixed There i...

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Abstract

The invention belongs to the drilling equipment filed, and particularly relates to a double guide rod coercing reset type float collar. The double guide rod coercing reset type float collar is characterized in that resetting of a valve core is enabled to be accurate andhave zero deviation by matching guide rods on two sides of the valve core with valve core supporting structures on an upper valve seat and a lower valve seat and through a reset spring, reliable sealing of the valve core and a middle valve seat is achieved through a seal valve block on the valve core, good erosion resistance effects of the valve core are obtained through different slope factors of the surface of the seal valve block, and therefore no sediment deposits around the valve core, and simultaneously, reliability of reverse direction sealing can be enhanced by using a sealing self locking structure of the lower valve seat cooperatively with a matched rubber plug. The double guide rod coercing reset type float collar is simple in structure, and can achieve reliable sealing in horizontal well cementing operation.

Description

technical field [0001] The invention belongs to the field of drilling equipment, in particular to a double guide rod forced reset type floating hoop. Background technique [0002] In the cementing construction of horizontal wells, the floating collar is placed horizontally, and the ordinary forced reset floating collar has a single guide rod structure, that is, there is a guide rod on the side of the upper valve seat. When the floating collar of this structure is placed horizontally, the valve stem may hang down due to gravity, the reset effect is not good, and there are many seal failures, resulting in shut-in and waiting for solidification, wasting a lot of time and affecting the well construction period. Contents of the invention [0003] In order to solve the problems of sealing surface erosion, silt deposition, and insufficient reset in the above-mentioned prior art, the present invention provides a double-guide rod forced reset type floating hoop, which has the effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/13E21B34/06
Inventor 杨森宋顺平李晓明金文哲王武王林
Owner 中国石油集团川庆钻探工程有限公司长庆钻井总公司
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