SU726309A1 - Cementing composition - Google Patents

Description

The invention relates to the field of obtaining polymer cement slurries used to mount oil and gas wells in the Far North, as well as for plugging conductors and directions in wells that reveal permafrost in the temperature range from -5 to -15 ° C. A polymer-based polymer composition based on a polyester binder, containing a mineral filler, a curing accelerator and an initiator | l3, is known. However, the known composition does not allow normal curing of the solution at. negative temperatures as well. The process of the screwdriver requires long exposure and high pressures. At the same time, hardened products have low physical and mechanical. properties. The closest in composition of uzheg. known is the cement slurry based on polyester binder and on a filler cured in the presence of a peroxide initiator by introducing into the mixture accelerators hardening, such as Co naphthenate or tertiary amine. However, This solution hardens only at room or elevated temperatures, and hardened also have low strength properties. The purpose of the invention is to develop a cold curing tampon solution capable of curing at low temperatures from -5 to -15 ° C, with obtaining a stone with enhanced strength properties. To achieve this goal, an unsaturated polyester cement slurry, including a mineral filler, a crosslinking monomer (oligoester acrylate), an initiator and an accelerator, is cured, a eutectic mixture of ferrocene or its alkyl derivatives 1,1-dimethyl-1,1 - is introduced as a curing accelerator DIETHYL-, 1,1-dipropyl, 1 -dibutylferrocene3 with oligoetriacrylate in a ratio of 1:10; following ratio of components, weight,%:

Unsaturated polyester

(NPS-60921M, PI-33

ipiT1N-g5). 40: -50

.OligoEfirakrnlat (,

, TMGF-11) 35-37

Mineral filler

(barite, sand, bentonite) 10-13

Cure remover

(eutectic mixture of ferroven or its alkyl derivatives | 1, 1-dimethyl, -, -diethip

-l, l-dipropyl, - 1,1-dibutylferrogen with oligoether acrylate3-5

Initiator of curing (hyperysis, methylztilketone peroxide, benzoyl peroxide paste). 2-5.

A solution of O, 1 g of ferrsdene or its alkalgly derivative in 100 g of oligoether acrylate, is preparing an eutectic mixture (CS) of the accelerator. The initiator of the screwdriver is introduced into the tampon mixture after combining the eutectic mixture of the accelerator with the polyester and filler. The high rate of crosslinking at the time of rep repatyTypax is achieved due to the high efficiency of the redox system used, due to the magnitude of the redox potential of the aTflavia metal in ferrocene and its alkylpryvide. The production of enhanced endings: ttibix and torsion characteristics is explained by the high degree of structure of the polyester binder during curing.

To obtain a tampon mixture curing at negative temperatures, having different setting times and physicomechanical properties, NUTS grouting mixtures with different types of unsaturated polyester, accelerator and various initiators in wt.%

Example 1. Unsaturated ester gHS-60921M) 40, oligoester acrylate (TGM-CS) 37, filler (baryte) 13, accelerator curing (eutectic mixture of ferrocene with TGM-CS 1: 1O) 5, initiator of disrupter - isopropylbenzene hydroperoxide (hyperise) 5.

The pot life of the material at 20 ° C is 14O min, at -10 ° C 5 hours. The curing temperature is -10 ° C. The strength of the cured material 20 minutes after the start of the setting of the smeghe when compressing 850 kg / cm for bending 42 O kg / cm. Shrinkage 0.05.%.

EXAMPLE 2 Unsaturated polyester 50, oligoether acrylate (MGF-9) 35, filler (sand) 10, curing accelerator (1,1-diethylferrocene eutectic mixture with MGF-9 1:10) 3, curing initiator (peroxide methyl ethyl ketone) 2.

Viability time: grouting mixture at 110 min, at -15 ° C 6 h Temperature setting -15 C. The strength of the mixture hardened) of the material after 2 O min after the start of the mixture setting at -, 15 ° C in compression 770 JKT / CM Bending 330 kg /cm . The shrinkage of the cured material is 0.08%.

Froze Unsaturated poly (FP-35) 45, oligoether acrylate (TMGF-11) 36, filler (bentonite) 12, curing accelerator (eutectic mixture of 1,1-dibutyl ferrite resin with TMGF-11 1:10) 4, initiator with c-, deni (benzoyl peroxide paste) 3.

The pot life of the mixture at a temperature of 90 minutes, at 2.5 hours. The curing temperature is -5 ° C. The strength of the cured material after 20 minutes at the start of the mixture setting at -5 ° C for compression is 8OO kg / cm, for bending 45O kg / cm. Shrinkage 0.07%.

The main physicomechanical properties of the solution and stone based on it are given in table. 1 and 2

Table

Shrinkage, 9b

Prsadent extractable in acetone for 30 days.

Compressive strength, kg / cm Bending strength, kg / cm

0.15

0.05

eight

850 420

N

q

a

S

to

YU

a H

and

CO oi

; As can be seen from table. 1 and 2, the cement slurry is able to cure well with at low temperatures with pitch heaving stones with high strength properties. of the invention about pramula 1, Cementing mortar for fixing wells at negative temperatures, containing as the basis an unsaturated polyester resin, oligoether acrylate, mineral filler, accelerator of curing and initiator of curing, characterized in that, in order to ensure normal curing in conditional negative temperatures ranging from -, 5 to -15 ° C, and obtaining stones with high strength properties, use a eutectic mixture as a curing accelerator. l1-Dimethyl, -, -diethyl, -, - "iproPil, - 1,1-dibutyl ferrscene of the ferrocene or its alkyl derivatives, with an oligomethyl ether, with the following component ratio, weight,%; Polyester resin 40-50 Oligoether acrylate 35-37 Mineral filler 10-13 Curing accelerator {eutectic mixture of ferrocene or its derivative with -. -dimethyl-1,1-diethyl, -1D-dipropyl,-1,1 -dibutylferrocene with oligosphyra-acrylate, 3-5 Initiator 2-5 2 2, Backing slurry according to claim 1, similar to that of an autocotone ferrocene mixture or its ash derivatives with oligoether acrylate are used in a 1: 1O ratio. Sources of information, pHHsiTbie into account in the examination 1. Patent Yaponii N 51-44992,. 26/3 / C 51, M ,, Cl. C 08 F 299 / O4, highlight. 1976. 2.Be: onwe k-Ferliie i2- TecVAnik, 74, 40, N9 7, S, 49G-496.

Claims (2)

Claim 1. Grouting mortar for fastening wells at low temperatures, containing as base unsaturated polyester resin, oligo-ester acrylate, mineral filler, curing accelerator and curing initiator, characterized in that, in order to ensure normal cure at low temperatures in the range from - 5 to -15 ° C and obtaining stone with high strength properties, as a curing accelerator are used eutectic mixture, ferrocene or its alkyl derivatives [1.1 ^x dimethyl, 1,1-diethyl ^T , -1,1 '-dipropil. - 1,1-dibutilferrotsen ^] oligoester acrylates with the following component ratio, wt.%: 40-50 35-37 10-13 3-5 2-5 π. 1, Unsaturated polyester resin Oligoester acrylate Mineral filler 5 Curing accelerator (eutectic mixture of ferrocene or its alkyl derivatives [1,1 '-dimethyl, - 1,1'-diethyl, - 1; 1'-di ¹⁰ propyl, - 1,1'-dibutylferrocene ^ with oligoester acrylate. Curing initiator 2. Grouting mortar according to ^15, characterized in that the eutectic mixture of ferrocene or its alkyl derivatives with opigo ester acrylate is used in a ratio of 1:10.