BESER high-pressure string repair technology is a technology that uses a curable liquid gel to form a chemical rubber plug in the wellbore to plug the wellbore leak point or the wellbore body. It has a lower viscosity, and is easy to enter micropores and large pores for filling. Annulus, fractures and formation fractures as well as casing damage are solidified in formation fractures or casing damage and the wellbore to achieve high pressure bearing under the condition of wellbore couple formation.

Characteristics

Fluidity and permeability: the system is a solid free gel with good flow state, easy pumping, strong permeability, and can enter various micro pores.

Strong bonding ability and compressive strength: The system has strong bonding ability with interfaces such as casing and formation, and the compressive strength of the body is relatively high, reaching over 140MPa.

Good elasticity and expansibility: The system has high toughness after solidification, is not easily broken, and has a certain degree of expansibility to avoid volume shrinkage during solidification.

Advantages

Strong permeability: This system has good permeability to some small gaps and micrometer sized pores, which is conducive to the high sealing requirements after sealing and enhances the overall bonding ability.

Long term effectiveness of sealing: The system still has good toughness under high pressure, which can ensure its integrity under long-term repeated pressure, is not easily damaged or cracked, and the system is acid and alkali resistant, which can resist the erosion of the geological environment for a long time.

Applications

Repair of casing boreholes and false perforations: BESER high-pressure string repair technology can form dense sealing plugs at damaged locations such as casing boreholes and false perforations, and ensure the effectiveness of sealing under bottom hole conditions of temperature 150 ℃ and pressure above 140MPa. At the same time, it can also maintain long-term stability of sealing under the action of acidic and alkaline liquids.

Abandoned well treatment: BESER high-pressure pipe column repair technology seals the wellbore that needs to be abandoned, which can maintain the effectiveness of sealing for a long time and avoid safety risks caused by geological activities.

Complementary Additives

BESER curing agent

Key Additive - BESER curing agent

Introduction

The BESER high-pressure column repair technology mainly consists of a system base liquid and BESER curing agent, with a simple system formula and convenient on-site operation.

Functions:

System reaction time regulation: Adjust the dosage of BESER curing agent according to different application environments to control the reaction time of BESER high-pressure column repair technology

Applicable Conditions:

BESER high-pressure column repair technology: Used in conjunction with BESER high-pressure column repair technology, the system's performance is regulated according to the situation of different wells.

Case Studies

YS112H3-3 Well

YS112H3-3 well is a gas well operated underground by Sinopec Zhongyuan. Due to the failure of the single flow valve at the bottom of the continuous oil pipe during operation, gas in the well flowed up into the continuous oil pipe, causing the pressure on the pipe to reach 30MPa, posing a serious safety hazard. It is necessary to seal the continuous oil pipe and remove it from the wellbore. After discussion, it was decided to use Jingzhou Jiahua Technology's BESER high-pressure pipe column repair technology for sealing operations. After pumping 1m ³ BESER sealant into the continuous oil pipe, it was pressurized and allowed to set for 48 hours. Finally, it was successfully sealed and the continuous oil pipe was removed.

Advantages and Effects:

The rubber plug has good sealing performance and strong toughness:Due to the need to prevent gas from escaping after sealing, there are extremely high requirements for the sealing performance with the sealing. At the same time, the continuous tubing is in a bent state, which requires high toughness for the sealing rubber plug to prevent gas leakage after bending. In response to these requirements, BESER high-pressure pipe column repair technology can be effectively implemented to ensure the safety and effectiveness of the sealing construction.