Layered segmented well cementing device for sidetracking drilling

一种侧钻井、固井的技术，应用在井眼/井的阀装置、井眼/井部件、土方钻采等方向，能够解决影响管柱内通径、工具结构复杂、通径小等问题，达到解决直径受限、工艺和操作简单、便于实施的效果

Active Publication Date: 2019-01-08
SHANDONG BOTONG PLASTIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of layered extraction, due to the complex structure of the tools required, the inner diameter of the pipe string is affected, and the inner diameter of the pipe string is just a very important parameter in oil production. It is a sidetracking process. In this way, the diameter of the sidetracking hole is a limited parameter. If the traditional method is adopted, that is, cementing first and then delamination, there are great difficulties in the implementation process due to the small diameter.

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0024] Refer to attached figure 1 with 2 , a layered and segmented cementing device for sidetracking wells mentioned in the present invention, its technical scheme is: including blind plug (1), cementing ash injection nipple (2), ash injection sealing sliding sleeve (3), the second One injection port (4), sealing rubber ring (5), first circulation hole (6), first mortar injector (7), self-sealing (8), water-swellable rubber (9), K344 packer ( 10), the first cementing tubing (11), the first mechanical switch (12), the program opening sleeve (13), the first hydraulic switch (14), the overflow connection sleeve (15), and the sealing plug (16) , ash injection core pip...

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Abstract

The invention relates to a layered segmented well cementing device for sidetracking drilling. The layered segmented well cementing device is characterized in that the left end of a plug is connected with a first cementing oil pipe through a short cementing ash section; a self-sealing unit, a water-swelling rubber and a K344 packer are installed successively at the outer side of the first cementingoil pipe; and an ash injection hole and a circulating hole are formed in the first cementing oil pipe. A mechanical switch, a hydraulic switch and a signal switch are connected to the upper end of the first cementing pipe successively. A second cementing pipe is connected to the left end of the signal switch; sidetracking drilling cementing pipe columns of a plurality of oil extraction layers areformed and layered ash injection and cementing are realized. The layered segmented well cementing device has the following beneficial effects: layered segmented cementing of the multiple oil extraction layers is realized by simple steel ball injection and pressing on the ground; the hydraulic switch, the signal switch, and the mechanical switch are arranged at the right places by lifting the ashinjection core rube and releasing a circulating pipe column, so that the follow-up layered oil extraction is realized conveniently. The whole process and operation are simplified and are convenient toimplement; and a problem of diameter limitation of the sidetracking drilling is solved.

Description

technical field [0001] The invention relates to a cementing device for sidetracking wells in oil and gas fields, in particular to a layered and segmented well cementing device for sidetracking wells. Background technique [0002] During the exploitation of oil and gas fields, there are a large number of waste gas wells (that is, wells with no exploitation value), and among these wells, there are still good wells nearby, and there are a large number of unexploited oil and gas layers. In order to save resources and save mining costs, Therefore, oil operators generally adopt the sidetracking method, and the sidetracking technology is to fix a skewer at a certain depth in the oil-water well, use its inclined plane to create and guide the deflection, and use the milling cone to drill the side of the casing. A complete set of technology for drilling a new wellbore through the window and then lowering the liner for cementing. [0003] In addition, many of the sidetracking wells ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B34/08E21B34/06
CPCE21B33/13E21B34/06E21B34/08E21B2200/04E21B2200/06
Inventor 马弘毅
Owner SHANDONG BOTONG PLASTIC CO LTD
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