Inverse circular sand washing adapter connector in rotary type of twin pipe

A rotary, reverse-circulation technology, used in flushing wellbore, wellbore/well components, earth-moving drilling, etc., can solve the problem that fluid cannot be in and out at the same time, and achieve the effect of convenient operation

Inactive Publication Date: 2010-05-12
LIAOHE GASOLINEEUM EXPLORATION BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a double-pipe rotary reverse circulation sand washing joint, which solves the problem in the prior art that the high-pressure swivel elbow sand washing is a single pipe, and only a single pipe of fluid can enter or flow out of a single pipe at the same time. Realize the problem of getting in and out

Method used

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  • Inverse circular sand washing adapter connector in rotary type of twin pipe
  • Inverse circular sand washing adapter connector in rotary type of twin pipe

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Embodiment Construction

[0008] In the accompanying drawings, a double-pipe rotary reverse circulation sand flushing joint consists of a sand flushing connecting pipe and an elbow joint 1, a compression ring 2, a backing ring 3, a thrust bearing 4, an O-ring 5, and a special sealing ring 6. The three-way conical shell 7 and the support shell 8 are composed. One side of the three-way conical shell 7 is provided with an oblique water inlet hole, and the other side is a closed shell. On the three-way conical shell, The lower part is respectively provided with reserved grooves for the thrust bearing 4, O-ring 5 and special sealing ring 6; the thrust bearing 4, O-ring 5 and special sealing ring 6 are respectively put into the reserved grooves, The thrust bearing 4 reserved groove on the upper part of the conical shell 7 is equipped with a backing ring 3 and a compression ring 2, and the backing ring 3 and the compression ring 2 are connected with the supporting shell 8 with threads, the sand washing connect...

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Abstract

This invention relates to a double-tube turning counter-circulation sand-washing joint composed of a sand-washing connecting tube, siphon joints, a compaction ring, a pad ring, a thrust bearing, O-shape sealing ring, a specific sealing ring, a T-taper shell and a supporting shell, in which a tilted inlet hole is set at one side of the T-taper shell and the other is a closed one, a thrust bearing,an O-shape sealing ring and obligated slots holding the thrust bearing, the O-shape sealing ring and the specific ring are set on the upper and lower parts of the T shell, and a pad ring is set on thethrust bearing slot and connected with the compaction ring by thread, the sand-washing connection tube and the siphon joints are connected with the supporting shell by thread.

Description

Technical field: [0001] The invention relates to a double-pipe rotary reverse circulation sand flushing joint used in oil production and workover operations. Background technique: [0002] At present, in domestic oil production and workover operations, the wellhead joints used for sand washing are generally high-pressure swivel elbows. This type of elbow is a single pipe, which can only realize single entry or single outflow of liquid, and cannot realize both in and out at the same time. It cannot satisfy two-stage Tube sand washing process needs. Therefore, it is necessary to develop a double-pipe rotary reverse circulation sand flushing joint for sand flushing in low-leakage wells. This has prevented the sand washing liquid from leaking into the oil layer to pollute the oil reservoir. The present invention is novel and inventive through the search (G071096) on June 12, 2007 by the Patent Search and Consultation Center of the State Intellectual Property Office. Inventio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/00
Inventor 管恩东张勇高歌军徐宏权何建忠李洪旭沈艳丽
Owner LIAOHE GASOLINEEUM EXPLORATION BUREAU
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