阅读说明：本技术 一种连续油管作业用金属减阻润滑剂 (Metal drag reduction lubricant for coiled tubing operation ) 是由 何小燕 姜丽丽 杨广财 王晗 杨雨林 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种连续油管作业用金属减阻润滑剂,其包括如下重量份的组分：主减阻剂50-99份、纳米润滑添加剂1-10份、分散剂0.3-5份、极压润滑添加剂0.005-5份、辅剂1-15份,辅剂为连续油管粘附剂或表面活性剂；由这些组分按比例混合配制而成。主减阻剂是失水山梨醇脂肪酸酯、蓖麻油脂肪酸、EPA鱼油不饱和脂肪酸、植物油二聚脂肪酸CAS、椰子油脂肪酸、妥尔油脂肪酸、大豆油脂肪酸、硫化脂肪酸酯和氯化石蜡中的一种或至少两种的混合物；连续油管粘附剂是油溶性酚醛树脂、萜烯树脂、呋喃树脂、有机硅树脂中的一种或或至少两种的混合物。本发明的金属减阻润滑剂可以降低连续油管和套管之间的摩擦力,大幅度增加连续油管的推进距离,达到顺利完成作业的目的。(The invention discloses a metal drag reduction lubricant for coiled tubing operation, which comprises the following components in parts by weight: 50-99 parts of main drag reducer, 1-10 parts of nano lubricating additive, 0.3-5 parts of dispersant, 0.005-5 parts of extreme pressure lubricating additive and 1-15 parts of auxiliary agent, wherein the auxiliary agent is coiled tubing adhesive or surfactant; is prepared by mixing the components in proportion. The main drag reducer is one or a mixture of at least two of sorbitan fatty acid ester, castor oil fatty acid, EPA fish oil unsaturated fatty acid, vegetable oil dimer fatty acid CAS, coconut oil fatty acid, tall oil fatty acid, soybean oil fatty acid, sulfurized fatty acid ester and chlorinated paraffin; the coiled tubing adhesive is one or a mixture of at least two of oil-soluble phenolic resin, terpene resin, furan resin and organic silicon resin. The metal anti-drag lubricant can reduce the friction force between the coiled tubing and the casing, greatly increase the propelling distance of the coiled tubing and achieve the purpose of smoothly finishing the operation.)

1. The metal drag reduction lubricant for the coiled tubing operation is characterized by comprising the following components in parts by weight:

50-99 parts of a main drag reducer, 1-10 parts of a nano lubricating additive, 0.3-5 parts of a dispersing agent, 0.005-5 parts of an extreme pressure lubricating additive and 1-15 parts of an auxiliary agent, wherein the auxiliary agent is a continuous oil pipe adhesive or a surfactant, and the main drag reducer is one or a mixture of at least two of sorbitan fatty acid ester, castor oil fatty acid, EPA fish oil unsaturated fatty acid, vegetable oil dimer fatty acid CAS, coconut oil fatty acid, tall oil fatty acid, soybean oil fatty acid, sulfurized fatty acid ester and chlorinated paraffin.

2. The metal drag reducing lubricant for coiled tubing operations of claim 1, comprising the following components in parts by weight: 79-91 parts of main drag reducer, 1-4 parts of nano lubricating additive, 0.5-5 parts of dispersant, 1-4 parts of extreme pressure lubricating additive and 3-12 parts of surfactant; the surfactant is one or a mixture of at least two of an emulsifier OS-15, a vegetable oil emulsifier CJ-1 produced by New Material Ltd, Huizhou Dengtian, a vegetable oil emulsifier CJ-2, a vegetable oil emulsifier CJ-3, an emulsifier span S-80 produced by Shichen Xin Lanxing science and technology Ltd, and Tween T-80 provided by chemical engineering science and technology Ltd, in Foshan Deng; the preparation method comprises the following steps: adding the main drag reducer into a reaction vessel, heating to 55-65 ℃, adding the surfactant, stirring for 10-15min, then adding the nano lubricating additive, stirring for 0.5-4h, then adding the dispersant, stirring for 1h, then adding the extreme pressure lubricating additive, and stirring for 3h to obtain the target product.

3. The metal drag reducing lubricant for coiled tubing operations as claimed in claim 2, wherein the metal drag reducing lubricant is used by adding the metal drag reducing lubricant into water at a ratio of 0.5-2% in a well section where the metal drag reducing agent is required to be used, stirring the mixture uniformly, pumping the mixture to the downhole through the coiled tubing inner cylinder, and circulating the mixture through the outer wall of the coiled tubing and the inner wall of the casing to reduce the friction force between the coiled tubing and the casing.

4. The metal drag reducing lubricant for coiled tubing operations of claim 1, comprising the following components in parts by weight: 77.5-82 parts of main drag reducer, 1.5-8 parts of nano lubricating additive, 1.5-2.5 parts of dispersant, 1.5-5 parts of extreme pressure lubricating additive and 9-12 parts of continuous oil pipe adhesive; the coiled tubing adhesive is one or a mixture of at least two of oil-soluble phenolic resin, terpene resin, furan resin and organic silicon resin; the preparation method comprises the following steps: adding a main drag reducer and a continuous oil pipe adhesive into a reaction vessel, heating to 200 ℃, stirring for 3h, cooling to 55-65 ℃, adding a nano lubricating additive, stirring for 30min, adding a dispersant, stirring for 1h, adding an extreme pressure lubricating additive, and stirring for 1-3h to obtain a target product.

5. The metal drag reducing lubricant for coiled tubing operations as claimed in claim 4, wherein the metal drag reducing lubricant is used by spraying the metal drag reducing agent uniformly onto the outer wall of the coiled tubing at the lower inlet of the coiled tubing during the initial phase of coiled tubing operations by means of a spraying device, thereby reducing the friction between the coiled tubing and the casing.

6. The metal drag reducing lubricant for coiled tubing operations as claimed in any one of claims 1 to 5, wherein the nano-lubricity additive is one or more of nano-copper, nano-zinc, fullerene C60, nano-diamond, zinc sulfide, copper borate, calcium borate, polystyrene nano-microspheres.

7. The metal drag reducing lubricant for coiled tubing operations of any of claims 1-5, wherein the dispersant is one or a mixture of two of water glass, triethylhexylphosphoric acid, sodium lauryl sulfate, sodium petroleum sulfonate, polyacrylamide, polyethylene glycol fatty acid ester, glyceryl tristearate, and glyceryl monostearate.

8. The coiled tubing operation metal drag reducing lubricant of any of claims 1-5, wherein the extreme pressure lubrication additive is one or a mixture of at least two of dibutyl phosphite, trimethyl phosphate, thiophosphate, sulfurized isobutylene, nitrogen phosphorus type extreme pressure antiwear additive, sulfurized cottonseed oil, sulfurized lard, sodium metaborate, and potassium triborate.

9. The metal drag reducing lubricant for coiled tubing operations of claim 2, consisting of the following components in parts by weight: 78 parts of main drag reducer, 1 part of nano lubricating additive, 5 parts of glycerol monostearate, 4 parts of sulfurized isobutylene and 12 parts of surfactant; the main drag reducer is prepared by mixing castor oil fatty acid and soybean oil fatty acid according to the weight ratio of 2:1, and the surfactant is prepared by mixing CJ-2 and T-80 according to the mass ratio of 1: 1; the nano lubricating additive is prepared by mixing fullerene C60, nano diamond and zinc sulfide according to the weight ratio of 1:2: 1.

10. The metal drag reducing lubricant for coiled tubing operations of claim 4, consisting of the following components in parts by weight: 77.5 parts of main drag reducer, 8 parts of nano lubricating additive, 1.5 parts of dispersant, 1 part of sodium metaborate and 12 parts of continuous oil pipe adhesive; wherein the main drag reducer is formed by mixing soybean oil fatty acid and coconut oil fatty acid according to the weight ratio of 3: 4; the continuous oil pipe adhesive is formed by mixing terpene resin, organic silicon resin and furan resin according to the weight ratio of 1:1: 1; the nano lubricating additive is formed by mixing nano zinc and zinc sulfide in equal weight ratio; the dispersing agent is formed by mixing stearic acid monoglyceride and lauryl sodium sulfate according to the weight ratio of 1: 2.

Technical Field

The invention relates to the technical field of underground operation of oil and gas field exploration and development, in particular to a metal drag reduction lubricant for coiled tubing operation, a preparation method and a use method thereof in various coiled tubing operations.

Background

The coiled tubing operation has the characteristics of under-pressure and under-balance operation, high speed and efficiency, high safety factor, low damage to stratum, low cost and the like, is widely applied to the group operations of drilling, well completion, well repair, well logging and the like of an oil-gas field, runs through the whole process of oil-gas exploitation, and is known as 'universal operation equipment'. Since the advent of coiled tubing, many studies have been conducted at home and abroad, and the contents of friction analysis, fatigue life, failure mechanism and the like in coiled tubing operation are particularly regarded by experts and scholars at home and abroad. Coiled tubing operations are increasing year by year, but the formation conditions encountered are also becoming increasingly complex. At present, the horizontal section in the reservoir is longer and longer, the longest section even reaches more than 3200m, and higher requirements are provided for the propelling distance of the continuous oil pipe. However, the coiled tubing is very easy to generate a self-locking phenomenon in a long horizontal section (the self-locking phenomenon refers to that when the frictional resistance of the casing wall borne by the coiled tubing is greater than or equal to the forward pushing force of the coiled tubing in the process that the coiled tubing pushes the coiled tubing to the horizontal section in the well, the self-locking phenomenon occurs, and the coiled tubing cannot be pushed forward), so that the operation task is failed. If the metal drag reduction lubricant for coiled tubing operation is used, the friction force between the coiled tubing and the casing can be greatly reduced, and the propelling distance of the coiled tubing is greatly increased.

Disclosure of Invention

The invention aims to provide a metal drag reduction lubricant for coiled tubing operation, which has performance remarkably superior to the prior art.

The invention provides a metal drag reduction lubricant for coiled tubing operation, which comprises the following components in parts by weight:

50-99 parts of main drag reducer, 1-10 parts of nano lubricating additive, 0.3-5 parts of dispersant, 0.005-5 parts of extreme pressure lubricating additive and 1-15 parts of auxiliary agent, wherein the auxiliary agent is selected from one of coiled tubing adhesive or surfactant.

Wherein the main drag reducer is one or a mixture of at least two of sorbitan fatty acid ester, castor oil fatty acid, EPA fish oil unsaturated fatty acid, vegetable oil dimer fatty acid CAS, coconut oil fatty acid, tall oil fatty acid, soybean oil fatty acid, sulfurized fatty acid ester and chlorinated paraffin.

The nano lubricating additive is one or more of nano copper, nano zinc, fullerene C60, nano diamond, zinc sulfide, copper borate, calcium borate and polystyrene nano microspheres.

The dispersing agent is one or a mixture of two of water glass, triethylhexyl phosphoric acid, sodium dodecyl sulfate, petroleum sodium sulfonate, polyacrylamide, fatty acid polyglycol ester, tristearin and stearic acid monoglyceride.

The extreme pressure lubricating additive is one or a mixture of at least two of acidic dibutyl phosphite, trimethyl phosphate, thiophosphate, sulfurized isobutylene, nitrogen-phosphorus type extreme pressure antiwear additive, sulfurized cottonseed oil, sulfurized lard, sodium metaborate and potassium triborate.

The surfactant is selected from one or a mixture of at least two of emulsifier OS-15, vegetable oil emulsifier CJ-1 produced by New Material Ltd, Huizhou Dentian, vegetable oil emulsifier CJ-2, vegetable oil emulsifier CJ-3, emulsifier span S-80 produced by Shichen Xin Lanxing science and technology Ltd, and Tween T-80 provided by chemical engineering science and technology Ltd, Foshan Denshi Denzhou.

The basic product information of vegetable oil emulsifier CJ-1 is as follows:

chemical components: a polysorbate; type (2): a non-ionic; appearance: an amber viscous oil; water content: hydroxyl value of 3 (%) or less: 65 to 82 (mgKOH/g); the chemical properties are as follows: is easily soluble in water, methanol and ethanol, and insoluble in mineral oil.

The basic product information of vegetable oil emulsifier CJ-2 is as follows:

chemical components: condensation products of fatty alcohols with ethylene oxide; type (2): a non-ionic; appearance: colorless liquid to cream-like paste; pH value: 5.0 to 7.0 (1% aqueous solution); cloud point: 68-100 (1% aqueous solution); color: less than or equal to 20 (Pt-Co); the chemical properties are as follows: is easy to dissolve in ethanol, glycol, etc., is easy to dissolve in water at the temperature higher than room temperature, and has excellent emulsifying, cleaning and wetting properties.

The basic product information of vegetable oil emulsifier CJ-3 is as follows: chemical components: condensation products of castor oil and ethylene oxide; type (2): a non-ionic; appearance: light yellow oil to paste; water content: less than or equal to 1.0 percent (%); candle point: 70-84 (1% aqueous solution); the chemical properties are as follows: is easy to dissolve in water, fatty acid or other organic solvents, and has excellent emulsifying property.

The coiled tubing adhesive is one or a mixture of at least two of oil-soluble phenolic resin, terpene resin, furan resin and organic silicon resin.

The metal drag reduction lubricant for the continuous oil pipe operation is divided into two types: (1) a metal drag reduction lubricant for coiled tubing operation comprises the following components in parts by weight: main drag reducer, nano lubricating additive, dispersant, extreme pressure lubricating additive and surfactant. (2) A metal drag reduction lubricant for coiled tubing operation comprises the following components in parts by weight: main drag reducer, nano lubricating additive, dispersant, extreme pressure lubricating additive and coiled tubing adhesive.

The first method comprises the following steps:

a metal drag reduction lubricant for coiled tubing operation comprises the following components in parts by weight: 79-91 parts of main drag reducer, 1-4 parts of nano lubricating additive, 0.5-5 parts of dispersant, 14 parts of extreme pressure lubricating additive and 312 parts of surfactant. The preparation method of the metal drag reduction lubricant comprises the following steps: adding the main drag reducer into a reaction vessel, heating to 55-65 ℃, adding the surfactant, stirring for 10-15min, then adding the nano lubricating additive, stirring for 0.5-4h, then adding the dispersant, stirring for 1h, then adding the extreme pressure lubricating additive, and stirring for 3h to obtain the target product. The application method of the metal drag reduction lubricant comprises the steps of adding the metal drag reduction lubricant into water according to the proportion of 0.5-2% in a well section where the metal drag reduction agent is required to be used, uniformly stirring, pumping to the underground through the inner cylinder of the coiled tubing, and circularly flowing through the outer wall of the coiled tubing and the inner wall of the casing, so that the friction force between the coiled tubing and the casing is reduced.

Preferably, the metal drag reduction lubricant for coiled tubing operation consists of the following components in parts by weight: 78 parts of main drag reducer, 1 part of nano lubricating additive, 5 parts of glycerol monostearate, 4 parts of sulfurized isobutylene and 12 parts of surfactant. The main drag reducer is prepared by mixing castor oil fatty acid and soybean oil fatty acid according to the weight ratio of 2:1, and the surfactant is prepared by mixing CJ-2 and T-80 according to the mass ratio of 1: 1; the nano lubricating additive is prepared by mixing fullerene C60, nano diamond and zinc sulfide according to the weight ratio of 1:2: 1.

And the second method comprises the following steps:

a metal drag reduction lubricant for coiled tubing operation comprises the following components in parts by weight: 77.5-82 parts of main drag reducer, 1.5-8 parts of nano lubricating additive, 1.5-2.5 parts of dispersant, 1.5-5 parts of extreme pressure lubricating additive and 9-12 parts of continuous oil pipe adhesive. The preparation method of the metal drag reduction lubricant comprises the following steps: adding a main drag reducer and a continuous oil pipe adhesive into a reaction vessel, heating to 200 ℃, stirring for 3h, cooling to 55-65 ℃, adding a nano lubricating additive, stirring for 30min, adding a dispersant, stirring for 1h, adding an extreme pressure lubricating additive, and stirring for 1-3h to obtain a target product. The application method of the metal drag reduction lubricant is that at the initial stage of the operation of the coiled tubing, the metal drag reduction agent is uniformly sprayed on the outer wall of the coiled tubing through a spraying device at the lower inlet of the coiled tubing, so that the friction force between the coiled tubing and the casing is reduced.

Preferably, the metal drag reduction lubricant for coiled tubing operation consists of the following components in parts by weight: 77.5 parts of main drag reducer, 8 parts of nano lubricating additive, 1.5 parts of dispersant, 1 part of sodium metaborate and 12 parts of continuous oil pipe adhesive. Wherein the main drag reducer is formed by mixing soybean oil fatty acid and coconut oil fatty acid according to the weight ratio of 3: 4; the continuous oil pipe adhesive is formed by mixing terpene resin, organic silicon resin and furan resin according to the weight ratio of 1:1: 1; the nano lubricating additive is formed by mixing nano zinc and zinc sulfide in equal weight ratio; the dispersing agent is formed by mixing stearic acid monoglyceride and lauryl sodium sulfate according to the weight ratio of 1: 2.

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

the metal drag reduction lubricant for the coiled tubing is prepared by adding a coiled tubing adhesive, a nonionic surfactant, a nano lubricating additive, a dispersing agent and various extreme pressure lubricating additives into a main drag reduction agent with a special functional group (with negative charge and anionic characteristics) for reaction. Due to the friction force between the coiled tubing and the casing in the coiled tubing operation process, the capacity of the coiled tubing for binding electrons is weak, and the electrons are volatilized to generate positive charges so as to show the cationic property. The special functional group and the additive of the metal drag reduction lubricant for coiled tubing operation can be quickly combined with the surface of a drilling tool to form a stable film structure, so that the contact area between the coiled tubing and a casing is reduced, the friction coefficient is greatly reduced, the friction force between the coiled tubing and the casing can be greatly reduced, the propelling distance of the coiled tubing is greatly increased, and the number of bridge plug sections is increased, so that the aim of smoothly completing a working task is fulfilled.

In addition, the coiled tubing adhesive has a certain protection and rust prevention effect on the coiled tubing as a unique metal adhesive component, and the service life of the coiled tubing is prolonged.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.