Preparation And Properties Of Water/Oil Swelling Rubber Used For Oilfield-parker

With the development of industry, the demand of petroleum is greatly increased, which leads to the oil spills condition becomes more and more serious, as a result, the research of new impervious materials, water or oil swelling rubber self-swollen packer, become a burgeoning field. The main material of the packer is water swelling rubber(WSR)or oil swelling rubber(OSR), which is a new function sealed material with high elasticity and water or oil swollen property. Considering the costs and technological factors in industry, WSR or OSR is always prepared by the way of mixing the supper absorb resin (SAR) or oil absorb resin (OAR) and the rubber together based on physical blending method, and the absorbent capability of the resin, the mechanical of the rubber as well as the compatibility between the resin and the rubber have a great influence on the application of the swelling material. The main design work is as follows:In the thesis, WSR was prepared by NBR, SAR, carbon black (CB), white carbon black (WCB), polyethylene glycol (PEG), silane coupling agent KH-570, and all other addition agents blended, moreover, the self-swollen packer was prepared by WSR. The effects of the mass of SAR, CB, WCB, PEG, silane coupling agent on the mechanical and swelling capabilities of WSR were separately studied. In addition, the microcosmic structure was studied by SEM. What's more, the radial expansion rate and pressure resistance property of the packer was investigated. The results showed that the swelling speed of WSR was greatly accelerated with the help of WCB and PEG, the mass lose rate of WSR was reduced under the influence of KH-570. In addition, the radial expansion rate of the WSR packer achieved to 110% in 5 days, and the pressure resistance of the parker reached to 23.6 MPa, which could meet the requirement of used for oilfield.A super oil absorb resin(OAR) based on suspension copolymerization was synthesised, with stearoyl methacrylate(SMA), butylacrylate(BA) and styrene(St) as functional monomers, polyvinyl alcohol(PVA) as dispersing agent, benzoyl peroxide as initiator, divinylbenzene(DVB) as cross-linking agent and chloroform as porogenic agent. The effect of water/oil ratio, dispersing agent, initiator, cross-linking agent, porogenic agent, comonomer ratio on the swelling property of OSR were studied. It showed that the preferable condition were water/oil ratio was 3:1, w(DVB)=1.2% ,w(BPO)=1.0%, w(PVA)=1%,w(CHCl₃)=35%, m(SMA):m(BA):m(St)= 33:67:12. The absorbent capability of OAR in phenixin,toluene,diesel oil was 11.2 g/g, 18.8 g/g, 27.4 g/g, respectively. Otherwise, the TG analysis showed that the OAR excellent thermal stability.OSR was prepared by SBR, OAR, CB, petroleum resin, and all other addition agents blended, and then, the self-swelling packer was made from OSR. The effects of the contain of OAR, CB, petroleum resin on the mechanical and swelling capabilities of OSR were separately studied. Moreover, the microcosmic structure was studied by SEM. The results showed that with the increasement of OAR, the oil absorbent capability of OSR was ameliorated but the mechanical was reduced, and when mixed with the petroleum resin, the compatibility of OSR was improved, as well as the mechanical and swelling capabilities. In addition, the radial expansion rate of the OSR packer could achieve to 80% in 6 days, and the pressure resistance of the parker could reach up to 27.6 MPa, which could meet the requirement of used for oilfield.