Semi-rigid centralizer
A centralizer and semi-rigid technology, which is applied in the direction of drilling equipment, earthwork drilling, drill pipe, etc., can solve the problems affecting the use effect of the centralizer, and achieve the effects of promoting the use, convenient disassembly and cost saving
Inactive Publication Date: 2021-01-22
江苏鑫鹏晟石油机械有限公司
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0004] The main problem of the semi-rigid centralizer in the prior art is: the connection problem between the centralizing strip and the hoop. The main problem is that when it is used, especially when the pressure is too large, the compression directly affects the stability of the centralizing strip. Effect
Method used
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[0016] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0017] A semi-rigid centralizer as shown in the figure includes an upper hoop 1 and a lower hoop 2 arranged parallel to each other, a centralizing strip 3 arranged between the upper hoop and the lower hoop, 10 centralizing strips, and The bars are obliquely connected between the upper hoop and the lower hoop, and the upper or lower end of the centralizing bar is connected to the upper hoop or the lower hoop through a connecting piece; the connecting piece includes a connecting head 4, a movable buckle 5, a groove 6. Chain 7; movable buckles are provided on both sides of the connector; a first groove is provided on one side of the connector, and a second groove consiste...
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Abstract
The invention discloses a semi-rigid centralizer. The semi-rigid centralizer comprises an upper hoop, a lower hoop and a centralizing strip, wherein the upper hoop and the lower hoop are arranged in parallel, the centralizing strip is arranged between the upper hoop and the lower hoop, and the upper end or the lower end of the centralizing strip is connected with the upper hoop or the lower hoop through a connecting piece; the connecting piece comprises a connector, movable buckles, grooves and a chain; the movable buckles are arranged on both sides of the connector; a first groove is formed in one side of the connector, a second groove which is consistent with the connector in position is formed in the center of the centralizing strip, the chain is arranged in the two grooves, one end ofthe chain is fixedly connected with the connector, the other end of the chain is fixedly connected with the centralizing strip, and the connector is connected with the upper hoop or the lower hoop through the movable buckles; and the connector is fixedly connected with the centralizing strip. The invention discloses the semi-rigid centralizer. The centralizing strip is not simply welded on the hoop, but is removably connected. The semi-rigid centralizer has the advantages of convenience in disassembly, simplicity in replacement and cost saving and is favorable for popularization and application.
Description
technical field [0001] The invention relates to the field of oil wellhead devices, in particular to a semi-rigid centralizer. Background technique [0002] Centralizer is an important device used in oil wellhead. Among them, the semi-rigid centralizer is made of SPHC alloy steel. The structural characteristics of the semi-rigid centralizer are: the inner diameter is generally 1-4mm larger than the outer diameter of the casing, which is easy to install on the casing. The centralizer is stamped and shaped like a bulge, which can withstand a certain pressure. When the pressure is too high, it can shrink to prevent the centralizer from being stuck in the wellbore. [0003] When in use, the centralizer can freely rotate and slide up and down on the casing. It can scrape off the mud cake and clean the well wall when the casing is put into the well, and can make the cement slurry swirl when injecting cement to improve the displacement efficiency. In deviated wells and horizontal...
Claims
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Login to View More IPC IPC(8): E21B17/10
CPCE21B17/1078
Inventor 陆德鹏
Owner 江苏鑫鹏晟石油机械有限公司