阅读说明：本技术 一种抽油杆接箍防偏磨及耐磨蚀的方法、以及抽油杆接箍 (Eccentric wear and abrasion preventing method for sucker rod coupling and sucker rod coupling ) 是由 冷传基 郭志永 郑召斌 杨晓明 于 2019-03-13 设计创作，主要内容包括：本发明涉及一种抽油杆接箍防偏磨及耐腐蚀的方法、以及抽油杆接箍,所述方法为,在抽油杆接箍表面涂覆镍磷-氧化锆金属陶瓷防护层。所述镍磷-氧化锆金属陶瓷防护层的厚度为0.08-0.1mm,维氏硬度为950-1100HV。本发明种能够广泛适用于各油田生产工况、从根本上解决抽油杆接箍发生偏磨问题的方法,并且能够在耐磨、耐腐蚀方面同时解决抽油杆接箍磨损的问题。(The invention relates to an eccentric wear and corrosion prevention method for a sucker rod coupling and the sucker rod coupling. The thickness of the nickel-phosphorus-zirconia metal ceramic protective layer is 0.08-0.1mm, and the Vickers hardness is 950-1100 HV. The method can be widely applied to various oil field production conditions, fundamentally solves the problem of eccentric wear of the sucker rod coupling, and can solve the problem of wear of the sucker rod coupling in the aspects of wear resistance and corrosion resistance.)

1. The method for preventing eccentric wear and corrosion of the sucker rod coupling is characterized in that a nickel-phosphorus-zirconium oxide metal ceramic protective layer is coated on the surface of the sucker rod coupling.

2. The method as claimed in claim 1, wherein the thickness of the NiP-zirconia cermet protective layer is 0.08-0.1mm, and the Vickers hardness is 950-1100 HV.

3. Method according to claim 1 or 2, characterized in that it comprises the following steps:

1) pretreating a sucker rod coupling: the coupling of the sucker rod is subjected to sand blasting, acid pickling and water washing in sequence to remove surface impurities for later use;

2) preparing electroplating solution: the electroplating solution comprises a nickel source, a phosphorus source, malic acid, zirconia micro powder, an additive and deionized water, wherein the additive is sodium glycolate and 1, 4-butynediol;

firstly, mixing the materials except the zirconia micro powder, and uniformly stirring the materials for later use; activating the zirconia micro powder by using hydrofluoric acid with the mass concentration of 5%, cleaning and filtering by using purified water, and adding the activated zirconia micro powder into the electroplating solution;

3) and (3) putting the pretreated sucker rod coupling into the electroplating solution, wherein the sucker rod coupling is used as a cathode, mechanically stirring the electroplating solution in the electroplating process, and continuing the electroplating process for 0.5-3h to obtain the sucker rod coupling coated with the nickel-phosphorus-zirconium oxide metal ceramic protective layer.

4. The method as claimed in claim 3, wherein the temperature of the plating solution is 65-75 ℃.

5. The method of claim 3, wherein the pH of the plating solution is adjusted to 7.5 to 9 with ammonia prior to electroplating.

6. A method according to claim 3, characterized in that the current density used during electroplating is 7-12A/dm²。

7. The method of claim 3, wherein the thickness of the nickel-phosphorus-zirconia cermet protective layer on the surface of the sucker rod coupling after the electroplating treatment is 0.08-0.1 mm.

8. A sucker rod coupling prepared by the method of any one of claims 1 to 9, comprising a nickel phosphorus-zirconia cermet protective layer and a sucker rod coupling body, wherein the nickel phosphorus-zirconia cermet protective layer is coated on the surface of the sucker rod coupling body.

9. The sucker rod coupling of claim 8, wherein the thickness of the nickel phosphorus-zirconia cermet protective layer is 0.08-0.1mm, and the Vickers hardness is 950-1100 HV.

Technical Field

The invention relates to the field of sampling equipment of an oil field injection well, in particular to an eccentric wear prevention method for a sucker rod coupling and the sucker rod coupling.

Background

The sucker-rod pumping well is an important tool in the oil field exploitation process, the sucker-rod pumping well produces liquid output influence due to well deviation and high corrosion in the middle and later stages of oil field development, the problem of eccentric wear of pipes commonly exists, the proportion of wells needing pump inspection is increased year by year due to eccentric wear, and statistics of sucker rod wear parts show that the wear of sucker rod couplings accounts for 60-70% of the total wear of sucker rods.

Disclosure of Invention

In order to solve the problems of serious eccentric wear and poor wear resistance and corrosion resistance of the sucker rod coupling under the double well conditions with higher contents of hydrogen sulfide, carbon dioxide, chloride ions and the like in the prior art, the invention provides an eccentric wear and corrosion prevention method of the sucker rod coupling, which comprises the following steps: the surface of the sucker rod coupling is coated with a nickel-phosphorus-zirconia metal ceramic protective layer.

Furthermore, the thickness of the nickel-phosphorus-zirconia metal ceramic protective layer is 0.08-0.1mm, and the Vickers hardness is 950-1100 HV.

Further, the method comprises the steps of:

1) pretreating a sucker rod coupling: the coupling of the sucker rod is subjected to sand blasting, acid pickling and water washing in sequence to remove surface impurities for later use;

2) preparing electroplating solution: the electroplating solution comprises a nickel source, a phosphorus source, malic acid, zirconia micro powder, an additive and deionized water, wherein the additive is sodium glycolate and 1, 4-butynediol;

firstly, mixing the materials except the zirconia micro powder, and uniformly stirring the materials for later use; activating the zirconia micro powder by using hydrofluoric acid with the mass concentration of 5%, cleaning and filtering by using purified water, and adding the activated zirconia micro powder into the electroplating solution;

3) and (3) putting the pretreated sucker rod coupling into the electroplating solution, wherein the sucker rod coupling is used as a cathode, mechanically stirring the electroplating solution in the electroplating process, and continuing the electroplating process for 0.5-3h to obtain the sucker rod coupling coated with the nickel-phosphorus-zirconium oxide metal ceramic protective layer.

Further, the temperature of the electroplating solution is 65-75 ℃ in the electroplating process.

Further, ammonia water is used for adjusting the pH value of the electroplating solution to 7.5-9 before electroplating.

Further, the current density adopted in the electroplating process is 7-12A/dm²。

Further, after electroplating treatment, the thickness of the nickel-phosphorus-zirconia metal ceramic protective layer on the surface of the sucker rod coupling is 0.08-0.1 mm.

Further, the nickel source is nickel sulfamate.

Further, the phosphorus source is sodium polyphosphate.

Further, the malic acid is DL-malic acid.

Further, the volume ratio of the sodium glycolate to the 1, 4-butynediol in the additive is 6: 1.

Further, the components of the plating solution include: 30-40g of nickel sulfamate, 15-20g of sodium phosphite, 20-40g of sodium polyphosphate, 5-10g of DL-malic acid, 60-100g of zirconia micropowder, 0.1-0.3g of additive and the balance of deionized water. Further preferably, the particle size of the zirconia micro powder is 2-6 microns.

The invention has the advantages of

1. The invention fundamentally solves the problems of eccentric wear prevention and corrosion resistance of the sucker rod coupling, and the structure of the operating equipment is not required to be changed;

2. the sucker rod coupling treated by the method can be widely applied to production working conditions of various oil fields, and the method fundamentally solves the problem of eccentric wear of the sucker rod coupling;

3. the sucker rod coupling treated by the method can solve the problem of abrasion of the sucker rod coupling in the aspects of wear resistance and corrosion resistance, has unexpected technical effects, and fundamentally solves the problem of short service life of the sucker rod coupling.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a sucker rod coupling of the present invention;

FIG. 2 is a partial enlarged view of a sucker rod coupling of the present invention.

1-a nickel phosphorus-zirconia cermet protective layer; 2-sucker rod coupling body.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.