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The method of using mud in the construction of directional drilling crossing the river

A technology for directional drilling traversing and construction, which is applied in directional drilling, drilling equipment and methods, and drilling compositions, etc. It can solve problems such as reduced mud carrying capacity, hole collapse, formation leakage, etc., and achieves improved mud carrying capacity. ability, maintenance of stability, effects of good sealing

Active Publication Date: 2020-02-11
CHINA MCC 2 GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of directional drilling, due to the improper use of mud, there are often phenomena such as hole collapse, reduced mud carrying capacity, and formation leakage.

Method used

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  • The method of using mud in the construction of directional drilling crossing the river
  • The method of using mud in the construction of directional drilling crossing the river
  • The method of using mud in the construction of directional drilling crossing the river

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Embodiment Construction

[0025] The technical solutions of the present invention will be described in detail below with reference to exemplary implementations. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

[0026] Such as figure 1 Shown, is the position relationship diagram of crossing track and river course in the present invention; As figure 2 Shown is the cross-sectional view of the horizontal directional drilling crossing channel route in the present invention.

[0027] The crossing track 2 is located below the river channel 1 and the ground. Point A is the entry point, point F is the exit point, A-C and D-F are the ramp sections, C-D is the horizontal section, and the crossing length is 2600m. A-C section is silty clay layer, ...

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Abstract

The invention discloses a using method of slurry in crossing-with-directional-drilling of river construction. The method comprises the steps that the slurry is prepared according to formation conditions and diameter and length of crossing pipelines, and suitable slurry materials are selected; in a pipeline crossing process, time needed by the slurry and a drilling bit to reach different soil layers is calculated according advance speed of directional drilling, reaming, hold flushing and pipeline back-dragging in different soil layers and flow rate of the slurry, the slurry required by different soil layers is injected into a drill hole at preset times, the slurry returned from the drill hole is injected into a slurry circulation tank, and the slurry is returned to the drill hole and used after the slurry is processed. According to the method, effects of suspending, carrying, lubricating, hole fixing, leakage plugging and the like of the slurry are improved, and occurrences of phenomenons of hole collapse, formation leakage and the like are effectively avoided.

Description

technical field [0001] The invention relates to a construction technology for directional drilling to cross a river, in particular to a method for using mud in the construction of directional drilling to cross a river. Background technique [0002] With the continuous application of new technology, new technology, new material and new equipment in practice, the construction level of pipeline engineering has been developed rapidly. Trenchless technology with excellent quality, high safety, short construction period, no pollution, less construction disturbance, and good economic and social benefits will become the mainstream trend of pipeline construction in the future. Pipeline construction in my country mainly adopts mechanical and manual excavation of trenches for direct burial laying. The construction is limited by the dense urban underground pipe network, which has great limitations. [0003] Horizontal directional drilling (HDD) is one of the new pipeline (line) laying ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/04E21B7/26E21B7/28C09K8/24C09K8/42C09K8/467C09K8/504C09K8/514
CPCC09K8/24C09K8/426C09K8/467C09K8/5045C09K8/514C09K2208/12C09K2208/34E21B7/046E21B7/26E21B7/28
Inventor 陈志刚范维立刘宁李兆华郝永峰孟庆东
Owner CHINA MCC 2 GRP CO LTD
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