Solid corrosion and scale inhibitor for oil field
A corrosion and scale inhibitor, solid technology, applied in wellbore/well components, chemical instruments and methods, earth-moving drilling, etc. The problem of easy adhesion of the agent can achieve the effect of long effective protection period of the agent, low cost of corrosion and scale inhibition, and good anti-corrosion and scale inhibition effect.
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Embodiment 1
[0049] The invention discloses a solid corrosion and scale inhibitor for oil fields, which comprises the following components:
[0050] 2-phosphonobutane-1,2,4-tricarboxylic acid PBTCA, polyethylene glycol, sodium hexametaphosphate, span-60 and stearic acid;
[0051] Wherein each component accounts for the mass percent of all components sum as follows:
[0052] 2-Phosphonic acid butane-1,2,4-tricarboxylic acid PBTCA: 30%~40%;
[0053] Polyethylene glycol: 10% to 15%;
[0054] Sodium hexametaphosphate: 10% to 15%;
[0055] Siban-60: 15% to 25%;
[0056] Stearic acid: 20% to 30%.
[0057] Described polyethylene glycol specifically refers to the commonly used technical grade polyethylene glycol PEG series in the petroleum drilling field, particularly the solid waxy polyethylene glycol with high relative molecular weight, and commonly used to increase viscosity and solidification, such as : PEG800, PEG1000, PEG1500, PEG2000, PEG4000 or PEG6000.
[0058] The product can be pr...
Embodiment 2
[0061] This product is a solid corrosion and scale inhibition rod for oilfields. The solid corrosion and scale inhibition rod contains 2-phosphonic acid butane-1,2,4-tricarboxylic acid PBTCA, polyethylene glycol, hexametaphosphoric acid Sodium, Span-60, stearic acid, the mass percent of each component is as follows:
[0062] 2-phosphonobutane-1,2,4-tricarboxylic acid PBTCA: 33%
[0063] Polyethylene glycol: 12%
[0064] Sodium hexametaphosphate: 12%
[0065] Span-60: 15%
[0066] Stearic acid: 28%
[0067] A more preferred preparation method of this product is: 2-phosphonic acid butane-1,2,4-tricarboxylic acid PBTCA, polyethylene glycol, sodium hexametaphosphate, Span-60, stearic acid by the above mass percentage Mix evenly, put it into a mold, and press it into a rod shape by a press to become the finished product.
[0068] The solid corrosion and scale inhibition rod described in this embodiment is determined by experiments: the corrosion inhibition rate is 93%, and the...
Embodiment 3
[0070] This product is a solid corrosion and scale inhibition rod for oilfields. The solid corrosion and scale inhibition rod contains 2-phosphonic acid butane-1,2,4-tricarboxylic acid PBTCA, polyethylene glycol, hexametaphosphoric acid Sodium, Span-60, stearic acid, the mass percent of each component is as follows:
[0071] 2-phosphonobutane-1,2,4-tricarboxylic acid PBTCA: 38%
[0072] Polyethylene glycol: 10%
[0073] Sodium hexametaphosphate: 10%
[0074] Span-60: 17%
[0075] Stearic acid: 25%
[0076] The preparation method of the present invention is: 2-phosphonic acid butane-1,2,4-tricarboxylic acid PBTCA, polyethylene glycol, sodium hexametaphosphate, Span-60, and stearic acid are uniformly mixed according to the above mass percentage , put it into the mold, and press it into a rod shape by a press, which is the finished product.
[0077] The solid corrosion and scale inhibition rod described in this embodiment is determined by experiments: the corrosion inhibitio...
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