Low-temperature high-strength oil-gas well plugging agent

A technology for oil and gas wells and plugging agents, applied in the field of oil and gas well sealing and plugging agents, low-temperature high-strength oil and gas well plugging agents, can solve the problems of slow development of low-temperature strength and weak impact resistance that cannot meet the construction requirements of channeling and plugging and other problems, to achieve the effect of excellent water impact resistance, rapid increase in strength, and increase in strength
CN111363527AInactive Publication Date: 2020-07-03JIAHUA SPECIAL CEMENT
5 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIAHUA SPECIAL CEMENT
Publication Date
2020-07-03
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a low-temperature high-strength oil-gas well plugging agent, and relates to the technical field of petroleum drilling materials. The low-temperature high-strength oil-gas wellplugging agent is prepared from the following raw materials in percentage by mass: 70 to 90 percent of an inorganic gel material, 0 to 0.5 percent of a fiber toughening agent, 1 to 20 percent of a filling material, 1 to 5 percent of an expanding agent, 0.1 to 0.3 percent of a flocculating agent and 0.05 to 0.2 percent of a retarder, wherein the inorganic gel material is sulphoaluminate cement, thefiber length of the fiber toughening agent is less than 12cm, the filling material is calcium carbonate powder and the retarder is a composition of boric acid and D-sodium gluconate. The sulphoaluminate clinker, the active admixture, the water-soluble organic material and other raw materials are adopted, so that the plugging agent has the characteristics of high hour strength development speed, high underwater impact resistance, high acid solubility and good thixotropic property at 10-60 DEG C under a specific ratio, and the plugging purpose is achieved by utilizing the characteristics of theplugging agent.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of petroleum drilling materials, in particular to an oil-gas well sealing and plugging agent, more specifically to a low-temperature high-strength oil-gas well sealing agent. Background technique

[0002] With the development of gas fields, formation pressure drops at a rate of 8% per year, and the forms of lost circulation and "leakage to blowout" are becoming more and more severe. The causes of lost circulation are mainly related to the geological structure and rock formation conditions in the mining area. The mining area is dominated by planted topsoil, gravel layers, and quicksand layers. The depth of surface water is relatively shallow, and the formation pressure is also relatively sensitive. Once the concentration of drilling fluid used in the drilling process is not suitable, accidents will occur. Low concentration will cause water discharge. , If the concentration is high, leakage will occur. [00...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More