Drilling wellhead suction auxiliary drainage manifold system

Abstract

The invention provides a drilling wellhead suction auxiliary drainage manifold system, comprising a plurality of hard pipeline bodies, a drilling sand drainage pipeline axial oblique injection suctionauxiliary drainage mechanism capable of realizing negative pressure suction at the drilling wellhead and / or pipeline turning position, and a telescopic pipeline length adjustment mechanism for drilling sand drainage pipelines capable of telescopic connection. According to the suction auxiliary drainage manifold system, the safety problem of gas drilling open well operation under the condition that a small amount of natural gas is produced from the formation can be solved, safety of the gas drilling open well operation in the gas bearing interval is greatly improved, the suction auxiliary drainage manifold system can further be applied to conventional positive circulation or reverse circulation gas drilling, so as to effectively reduce the local loss at the right angle turning and make a surface sand discharge process more smooth; and the length of the sand drainage pipelines can be easily, conveniently and randomly adjusted, the sand drainage pipelines are communicated quickly in a butt-joint mode to avoid repeated lifting and prying, workload and work intensity of staff are reduced, a installation period is shortened, and the cost of the staff and the use cost of a crane are saved.

Description

technical field [0001] The present invention relates to the technical field of oil and gas drilling (drilling) engineering, and furthermore, relates to a sand discharge manifold equipment system for drilling, which can be used to carry out nitrogen suction safety operations under the condition of a small amount of natural gas from the formation, and can also be used for positive circulation or During reverse circulation drilling, the sand discharge resistance of the surface sand discharge manifold can be reduced, and the sand discharge effect can be improved. Background technique [0002] In general, gas drilling technology has the advantages of speed increase, leakage control and reservoir protection. In recent years, it has been widely used in Sichuan-Chongqing, Xinjiang, Qinghai and other oil and gas blocks, and the speed of conventional drilling has been increased by more than 3 times compared with the same period of last year. It is more and more common to use gas drill...

AI Technical Summary

Problems solved by technology

[0009] For example, one of the objectives of the present invention is to solve the safety problem of gas drilling open well operation under the condition of a small amount of natural gas from the formation and the difficulty of connecting the sand discharge pipeline in the well site of gas drilling

Another object of the present invention is that it can be used to solve the problem of conventional positive circulation or reverse circulation gas drilling (especially reverse circulation drilling), where there are many right-angle turns in the sand discharge channel on the surface, resulting in a large local loss, which in turn affects the discharge. The problem of sand effect, and the difficulty of docking the sand discharge pipeline in the well site of gas drilling

Images