CN111577207B

CN111577207B - Spiral drainage tool in oil pipe for horizontal gas well

Info

Publication number: CN111577207B
Application number: CN202010408738.7A
Authority: CN
Inventors: 张永平; 蔡萌; 马文海; 张洪涛; 冯明喜; 马品刚; 王长根; 翟江涛; 王景芹; 袁玲
Original assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Current assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2022-06-10
Anticipated expiration: 2040-05-14
Also published as: CN111577207A

Abstract

The invention relates to the technical field of gas production engineering, and belongs to an oil pipe internal spiral drainage tool for a horizontal gas well. The problem that deep drainage of a horizontal well cannot be realized due to structural limitations of well deviation and a well completion well body in a conventional drainage and gas recovery mode is solved. The anti-rotation spiral guide vane type anti-rotation device comprises a limiting circular block (1), an anti-rotation pin (2), a lower fixing ring (3), an outer cylinder (4), a spiral belt (5), an upper fixing ring (6), a central shaft (7), a tapered roller bearing (8), a first-stage limiting fixing ring (9), a second-stage limiting fixing ring (10), a third-stage limiting fixing ring (11), a fourth-stage limiting fixing ring (12), a fifth-stage limiting fixing ring (13), a guide vane (14), an inner spiral belt (15) and a limiting sleeve (16). The invention has the advantages of improving the liquid carrying capacity of the horizontal section of the gas well, discharging accumulated liquid of the horizontal section of the gas well, integrally improving the liquid carrying effect of gas well production, improving the single well yield of the gas well and the like.

Description

Horizontal gas well is with interior spiral drainage instrument of oil pipe

Technical Field

The invention relates to the technical field of gas production engineering, and belongs to an oil pipe internal spiral drainage tool for a horizontal gas well.

Background

In the production process of a gas well, water yielding is increased along with the reduction of stratum energy, and reasonable drainage and gas production process measures need to be taken. At present, the common drainage gas recovery process measures have the problems of incapability of solving the problems of well deviation, well completion and well body structure limitation and the like, and the aim of deep drainage of a horizontal well cannot be fulfilled.

Disclosure of Invention

The invention aims to design an oil pipe internal spiral drainage tool for a horizontal gas well, which can play a role in deep drainage of the horizontal well, is not limited by well deviation and well completion well body structures and enables a tool to be lowered to a horizontal section of the gas well.

The invention is realized by the following technical scheme:

a horizontal gas well oil pipe internal spiral drainage tool comprises a limit round block, an anti-rotation pin, a lower fixing ring, an outer cylinder, a spiral belt, an upper fixing ring, a central shaft, a conical roller bearing, a first-stage limit fixing ring, a second-stage limit fixing ring, a third-stage limit fixing ring, a fourth-stage limit fixing ring, a fifth-stage limit fixing ring, a guide vane, an inner spiral belt and a limit sleeve, wherein the first-stage limit fixing ring, the second-stage limit fixing ring, the third-stage limit fixing ring, the fourth-stage limit fixing ring and the fifth-stage limit fixing ring are in threaded connection to form a mandrel, the central shaft is limited and fixed in the outer cylinder through the upper fixing ring and the lower fixing ring, the upper fixing ring and the lower fixing ring are respectively in threaded connection with the outer cylinder, the central shaft and the upper fixing ring are fixed through a cross-shaped anti-rotation groove, the central shaft and the lower fixing ring are fixed through the anti-rotation pin, and the limit round block is in threaded connection with the lower fixing ring, the first-stage limiting fixing ring, the second-stage limiting fixing ring, the third-stage limiting fixing ring, the fourth-stage limiting fixing ring, the fifth-stage limiting fixing ring and four tapered roller bearings are alternately arranged on the central shaft and are limited axially through the limiting sleeve, the spiral belt is welded on the outer surface of the mandrel, the inner wall of the outer barrel is welded with the inner spiral belt, and the upper fixing ring is internally provided with guide vanes.

The central shaft is fixed relative to the outer cylinder, and the mandrel can rotate around the central shaft.

Compared with the prior art, the invention has the following advantages:

the invention has simple structure, reliable work and long service life, adopts the design that the spiral belt and the inner spiral belt are welded on the outer surface of the mandrel to change the gas-liquid flowing state under the combined action, and the mandrel can rotate around the central shaft. Meanwhile, the problem that a conventional drainage gas recovery mode is not suitable for a horizontal well is solved, the liquid carrying capacity of the horizontal section of the gas well is improved, and accumulated liquid of the horizontal section of the gas well is discharged, so that the liquid carrying effect of gas well production is integrally improved, and the single-well yield of the gas well is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 shows a mandrel

A schematic structural diagram;

fig. 3 is a sectional view of the guide vane 14.

In the figure, 1-a limit round block, 2-an anti-rotation pin, 3-a lower fixing ring, 4-an outer cylinder, 5-a spiral belt, 6-an upper fixing ring, 7-a central shaft, 8-a tapered roller bearing, 9-a first-stage limit fixing ring, 10-a second-stage limit fixing ring, 11-a third-stage limit fixing ring, 12-a fourth-stage limit fixing ring, 13-a fifth-stage limit fixing ring, 14-a guide vane, 15-an inner spiral belt and 16-a limit sleeve,

-a mandrel.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which: the invention is composed of a limit round block 1, an anti-rotation pin 2, a lower fixing ring 3, an outer cylinder 4, a spiral belt 5, an upper fixing ring 6, a central shaft 7, a tapered roller bearing 8, a first-stage limit fixing ring 9, a second-stage limit fixing ring 10, a third-stage limit fixing ring 11, a fourth-stage limit fixing ring 12, a fifth-stage limit fixing ring 13, a guide vane 14, an inner spiral belt 15 and a limit sleeve 16, wherein the limit round block is provided with a plurality of limiting holes, and the upper fixing ring is provided with a plurality of limiting holes and a plurality of limiting holesThe middle-level limiting fixing ring 9, the second-level limiting fixing ring 10, the third-level limiting fixing ring 11, the fourth-level limiting fixing ring 12 and the fifth-level limiting fixing ring 13 are in threaded connection to form a mandrel

The center pin 8 is spacing fixed in urceolus 4 through upper fixed ring 6 and lower fixed ring 3, upper fixed ring 6 and lower fixed ring 3 respectively with urceolus 4 threaded connection, center pin 7 prevents with upper fixed ring 6 through "cross" that the groove is fixed that changes, center pin 7 is fixed through preventing changeing pin 2 with lower fixed ring 3, spacing circular block 1 and 3 threaded connection of lower fixed ring, one-level spacing fixed ring 9, second grade spacing fixed ring 10, tertiary spacing fixed ring 11, level four spacing fixed ring 12, five-level spacing fixed ring 13 and four tapered roller bearing 8 alternate arrangement are on center pin 7, and spacing through 16 axial spacing sleeves, 5 welding of helical ribbon are spacing at dabber 4, the spiral ribbon is welded at dabber

An inner spiral belt 15 is welded on the outer surface and the inner wall of the outer cylinder 4, and guide vanes 14 are arranged in the upper fixing ring 6.

The central shaft 7 is fixed relative to the outer cylinder 4 and the mandrel

Can rotate about a central axis 7.

When the device is used on site, the outer cylinder 4 is connected with the tail end of an oil pipe of a gas well or the tail end of a coiled oil pipe, is put into the gas well along with the oil pipe string or the coiled oil pipe in a short-circuit mode of the oil pipe, and is placed in an inclined well section or a horizontal section of the horizontal gas well. Six gas-liquid inflow pore canals are circumferentially arranged on the lower fixing ring 3. The upper fixing ring 6 is provided with three guide vanes 14 for providing a tangential outflow channel for gas and liquid through the spiral belt. The gas-liquid two-phase fluid in the shaft enters the tool to drive the mandrel

Rotating, core-shafts

Surface spiral band 5 and inner surface spiral band 1 of outer cylinder 4And 5, the gas-liquid flow state is integrally changed, the turbulent flow state of the gas-liquid two-phase mixed flow at the horizontal section is changed into the spiral vortex laminar flow which reduces the flow sectional area of the fluid, the liquid carrying effect is improved by utilizing the self energy of the gas well, the accumulated liquid in the shaft is removed, and the gas yield of the gas well is improved.

Claims

1. The utility model provides a horizontal gas well is with interior spiral drainage instrument of oil pipe which characterized in that: the anti-rotation mandrel consists of a limiting round block (1), an anti-rotation pin (2), a lower fixing ring (3), an outer cylinder (4), a spiral belt (5), an upper fixing ring (6), a central shaft (7), a tapered roller bearing (8), a first-stage limiting fixing ring (9), a second-stage limiting fixing ring (10), a third-stage limiting fixing ring (11), a fourth-stage limiting fixing ring (12), a fifth-stage limiting fixing ring (13), a guide vane (14), an inner spiral belt (15) and a limiting sleeve (16), wherein the first-stage limiting fixing ring (9), the second-stage limiting fixing ring (10), the third-stage limiting fixing ring (11), the fourth-stage limiting fixing ring (12) and the fifth-stage limiting fixing ring (13) are in threaded connection to form a mandrel (I), the central shaft (7) is limited and fixed in the outer cylinder (4) through the upper fixing ring (6) and the lower fixing ring (3), and the upper fixing ring (6) and the lower fixing ring (3) are in threaded connection with the outer cylinder (4) respectively, a central shaft (7) is fixed with an upper fixing ring (6) through a cross-shaped anti-rotation groove, the central shaft (7) is fixed with a lower fixing ring (3) through an anti-rotation pin (2), a limiting round block (1) is in threaded connection with the lower fixing ring (3), a first-stage limiting fixing ring (9), a second-stage limiting fixing ring (10), a third-stage limiting fixing ring (11), a fourth-stage limiting fixing ring (12), a fifth-stage limiting fixing ring (13) and four conical roller bearings (8) are alternately arranged on the central shaft (7) and are axially limited through a limiting sleeve (16), a spiral belt (5) is welded on the outer surface of a mandrel (I), an inner spiral belt (15) is welded on the inner wall of an outer barrel (4), and guide vanes (14) are arranged in the upper fixing ring (6); the outer cylinder (4) is connected to the tail part of the coiled tubing through a tubing buckle thread and is arranged into the horizontal section along with the coiled tubing.