Stage Cementing Tools (DV Tools) HYDRIL 513 Connection

Stage Cementing Tools (DV Tools) HYDRIL 513 Connection
Stage Cementing Tools (DV Tools) is used in oil and gas well cementing operations,specifically designed to create pressure grading.The Cementing Collaris usually composed of two annular components, upper and lower,which are placed in specific positions on the oil pipe or casing during installation, forming a series of pressure grading.
 Stage Cementing Tools including Hydraulic Stage Tool,Drilling Free Stage Cement Collar,Mechanical Stage Tool.
  Specifically, after installing the Stage Collar underground, a restricted pressure zone will be formed above it. When mud or cement slurry enters the wellbore from underground, it enters this area first and is limited by the upper annular component of the Mechanical Stage Tool, forming a certain pressure to ensure the stability of the wellhead and avoid leakage.
  The Hydraulic Stage Tool can meet some special cementing needs, such as wellbore pressure grading, cement slurry layering in multi-layer wellbore cementing, and playing a role in preventing leakage and supporting the wellhead in cementing operations in debris wells. However, in comparison, the cost of using graded clamps for cementing is higher and the construction difficulty is relatively higher.
  Cementing Stage Tools is a device used in oil and gas well cementing operations, specifically designed to create pressure grading. The Multi-Stage Cementing Collar is usually composed of two annular components, upper and lower, which are placed in specific positions on the oil pipe or casing during installation, forming a series of pressure grading.
Specifically, after installing the Packer Stage Cementing Collar underground, a restricted pressure zone will be formed above it. When mud or cement slurry enters the wellbore from underground, it enters this area first and is limited by the upper annular component of the Pump Out Stage Cementing Collar, forming a certain pressure to ensure the stability of the wellhead and avoid leakage.
The DV Collar can meet some special cementing needs, such as wellbore pressure grading, cement slurry layering in multi-layer wellbore cementing, and playing a role in preventing leakage and supporting the wellhead in cementing operations in debris wells. However, in comparison, the cost of using graded clamps for cementing is higher and the construction difficulty is relatively higher.
Characteristics of hydraulic Cementing Tools:
Adopting an internal closing structure, the closing sleeve locks itself after closing;When opening and closing, there is no problem of small cavity liquid compression;
The inner diameter of the upper and lower joints is consistent with the inner diameter of the casing, but smaller than the inner diameter of the closing sleeve, which can effectively protect the closing sleeve from damage during drilling and removal operations;
All attachments are made of rubber/aluminum materials with good drillability and have anti rotation mechanisms for easy drilling and removal.