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Annulus flow control nipple of oil and gas well and application method thereof

A technology for oil and gas wells and annulus, which is applied in the development of fluids, drilling equipment, earth-moving drilling, etc., can solve the problems of lack of tools and methods to control the state of annular fluid, and achieve the effect of reducing damage

Pending Publication Date: 2018-11-13
刘向京
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of the lack of tools and methods for controlling the fluid state in the annular space in the prior art, and to provide an oil and gas well annular space flow control nipple and its application method

Method used

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  • Annulus flow control nipple of oil and gas well and application method thereof
  • Annulus flow control nipple of oil and gas well and application method thereof
  • Annulus flow control nipple of oil and gas well and application method thereof

Examples

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Effect test

Embodiment 1

[0048] figure 1 It is a schematic diagram of the structure of the oil and gas well annulus flow control nipple (connection) of the present invention. The oil and gas well annular flow control nipple (joint) of the present invention includes: nipple pipe body 1-1, brush wire (hair) 1-2, and brush wire attachment body 1-3.

[0049] The pup pipe body 1-1 can be an oil pipe pup joint, or other pipe pup joints, which are common oilfield pipes.

[0050] The brush wires (hairs) 1-2 are general-purpose materials, such as metal wires and abrasive wires with high elasticity and hardness, and the brush wires that can be selected according to needs include metal wires, nylon wires, plastic wires, and abrasive wires. , sisal, mountain palm, bristle.

[0051] The brush filament attachment 1-3 is convenient to fix the carrier of the bristles, the same as others in the brush industry, and belongs to the known content in the field of brush making, so it will not be described here.

[0052] ...

Embodiment 2

[0054] figure 2 It is a schematic diagram of the basic flow control unit when the annular space flow control nipple (connection) of the oil and gas well of the present invention is applied. There are several main basic types. The basic type I includes: the inner wall of the well 1, the annular space flow control nipple in series, and The bristles filling the annulus form a semi-permeable packing ring (bristle ring 2-1 for short); the basic type II includes: the inner wall of the well 1, the outer wall of the pipe string, the bristle ring 2-1 and the semi-permeable packing ring 2-2 of solid particles The basic type III includes: the well wall 1, the outer wall of the pipe string, the bristle ring 2-1, and the solid particles on one side of the bristle ring 2-1 form a semi-permeable packing ring 2-2.

[0055] A plurality of annular space flow control pipe string units may be connected in series to form an annular space flow control pipe string unit group 2 .

[0056] The semi-...

Embodiment 3

[0059] When carrying out high-energy gas fracturing construction, for the sake of construction safety, the blocking pressure of well fluid is usually relied on to ensure the efficiency of high-energy gas fracturing. In fact, the pressure of the liquid column is far from enough to suppress the energy of the high-energy gas overflow, and the effect is not ideal. However, the application of the existing isolation technology is complex and will cause safety accidents. Such as image 3 As shown, the present invention blocks and reduces the flow of gas energy from the annulus by arranging at least one basic flow control unit II to form a semi-permeable sealing layer of the flow control unit group 2 above the high-energy gas fracturing device 5. overflow. When the high-energy gas and driven well fluid pass through the annular flow control pipe string unit (group) 2, especially when the semi-permeable isolation ring section 2-2 is formed by the solid particle filling, the gaps betwee...

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Abstract

The invention discloses an annulus flow control nipple of an oil and gas well and an application method thereof, and belongs to the field of downhole process pipe string tools of oil and gas wells. Aannulus flow control nipple tool is formed by arranging a brush bristle layer outside a conventional nipple; during using, depending on an annulus flow control unit (set) formed by a brush bristle ring of the annulus flow control nipple in a pipe string annulus, a semi-permeable blocking ring section is formed in the downhole, the functions of packing, blocking and filtering are provided for different production purposes, the new solution for controlling the annulus fluid state is provided for flow control sand prevention, fracturing construction and enhanced perforation construction of a production well, and the purposes of solving corresponding production and construction are achieved. According to the annulus flow control nipple tool of the oil and gas well and the application method thereof, operation is easy, convenient and fast, construction is easy, the cost is lowered advantageously, and power consumption is reduced advantageously.

Description

technical field [0001] The invention belongs to the field of petroleum exploitation, and relates to an oil gas well downhole process pipe string tool and an application method, in particular to an oil gas well annular space flow control nipple (joint) and an application method thereof. Background technique [0002] In the development and production of oil, gas and water wells, the annulus of the pipe string is the channel for fluids to enter and exit, and it is also the path for various construction operations. However, the types of tools that can be used are very small, and the methods that can be used are lacklustre. [0003] 1. Some construction wells need to block the target well section: fracturing construction wells, high-energy gas-assisted perforating wells, when constructing the target layer, in order to realize the concentrated utilization of fluid energy, specific methods and tools must be used to block the annular space. Breaking is generally achieved through pa...

Claims

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Application Information

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IPC IPC(8): E21B17/02E21B43/11E21B43/26E21B43/02
CPCE21B17/021E21B43/02E21B43/11E21B43/26
Inventor 刘向京
Owner 刘向京
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