| abstract |
The invention provides a method for preparing a viscosity-increasing and shearing-lifting agent for drilling fluid, comprising: adding water-phase material into oil-phase material to emulsify to obtain an emulsion; subjecting the emulsion and an initiator to a polymerization reaction to obtain a drilling fluid Use a tackifier. The invention adopts an inverse emulsion polymerization method, synthesizes a viscosity-increasing and cutting polymer with a hyperbranched structure through a RAFT controllable polymerization method, the reaction process is easy to control, and the obtained product has good temperature resistance. Compared with the linear polymer, under the same molecular weight, the hyperbranched polymer prepared by the present invention has better dispersibility and lower viscosity in water, and the inverse emulsion polymer provided by the present invention does not need drying and pulverization, and can be It can be directly added to the drilling fluid for use. Compared with the powdery polymer, the inverse emulsion polymer in the present invention can greatly reduce the dosage and the treatment cost of the drilling fluid under the condition of achieving the same effect, and has a good application prospect. |