Novel combined eccentric wellhead of screw pump

Abstract

The invention discloses a novel combined eccentric wellhead of a screw pump. The problem that an existing screw pump can only be tested after being emptied is solved. The novel combined eccentric wellhead comprises a test pipeline, a lower port of the test pipeline is connected with a well test valve of the screw pump, and an upper port is detachably connected with a sealing assembly. The test pipeline is provided with a left gate valve and a right gate valve, and a flexible structure is disposed at the butt joint position of the two valves. When the two valves are in butt joint sealing together with the test pipeline, a test steel wire is clamped between butt joints, and the flexible structure can protect the test steel wire from damage. The whole process of sealing pressure data acquisition is achieved, which reduces the waiting time for restoring stable time during flow pressure acquisition, shortens test time and improves work efficiency.

Description

technical field [0001] The invention relates to a wellhead device of an oil field. Background technique [0002] Eccentric screw pumps are more and more widely used in oil fields, but the test methods for such wells are still far from perfect. During the test, it is required that the steel wire wellhead test channel is sealed, so the blowout prevention valve should be closed. [0003] The blowout prevention valve is a gate valve. If the blowout prevention valve is closed, the gate will pinch off the test wire, and the test cannot be performed. Therefore, the test can only be performed after venting, which not only pollutes the environment, but also affects the safety of the test. have a greater impact. At the same time, in order to keep the current pressure recording stable, the current pressure recording time can only be extended, which will cause delays in test time and affect work efficiency. [0004] The pressure relief test is not suitable for wells with dirty casing...

AI Technical Summary

Problems solved by technology

[0003] The blowout prevention valve is a gate valve. If the blowout prevention valve is closed, the gate will pinch off the test wire, and the test cannot be performed. Therefore, the test can only be performed after venting, which not only pollutes the environment, but also affects the safety of the test. have a greater impact

At the same time, in order to keep the flow pressure recording stable, the flow pressure recording time can only be extended, causing delays in test time and affecting work efficiency

[0004] The pressure relief test is not suitable for wells with dirty casing, shallow fluid surface or shallow foam section, and can only be carried out by indirect pressure measurement, which has a great impact on the interpretation of test data

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