高压试井新型仪器捕捉释放器

油气水高压井试井的工作,通常需测试人员在井口高压防喷管上进行高空作业,针对试井仪器工具串在下入、提至井口的试井防喷管的过程中,因仪器工具串较长、配重大,存在操作不便、仪器易意外落井等安全隐患问题。某所研制出一种新型仪器捕捉释放器,在苏北、东北、新疆工区150多井次的现场应用表明,该新型仪器捕捉释放器,捕捉、释放仪器的成功率为100%,避免了高空作业时试井仪器工具串在下入、提至井口的试井防喷管的过程中的费时、费力、仪器落井等安全隐患,对高压油气水井试井工作的经济性和安全可靠性具有十分重要的意义。

某超高压井系统试井特征曲线分析

本文对某超高压井系统试井资料进行了综合分析，由此建立了产油量、油压与油嘴直径以及油管动压头损失与产油量之间的关系。应用这些关系式并结合实际资料对直高压油井生产动态、油管动压头损失和停喷流压进行分析预测。

Reasons resulting in the collapsed tubing near wellhead in high pressure and high temperature deep well during well testing and measures to prevent the collapsing

Because various reasons, the tubing near wellhead was collapsed during well testing in high pressure and high temperature deep well when the outer pressure was less than collapsing strength. To find the reasons in the abnormally collapse and countermeasures, first the quality of the tubing was checked. It was founded that the collapse was not resulted from the defect of the tubing. Then, force and stress exerted in the tubing was analyzed taking XS2 well as an example. The analysis results were concluded as follows. The collapsing strength of tubing decreased due to the axial tensile, which is seriously at the upper tubing especially. During injecting, the additional axial force that was caused by the temperature effect increased the tubing near wellhead to suffer axial tensile and further reduced the collapsing strength of tubing near wellhead. Reinforcing defect, prohibiting defect tubing to trip in hole, according to the calculation to impose appropriate annular pressure, selecting size nozzle to reverse pumping and controlling the reverse pumping speed and pressure, prohibiting to be opened flow and reducing or releasing the annular pressure can prevent the well testing tubing down-hole being collapsed at the wellhead.