Fracturing wellhead ball catcher

Abstract

The invention relates to a fracturing wellhead ball catcher and solves the defects that after a ball injection sliding sleeve in formation-shift fracturing of an existing oil and gas well is operated for production, a fracturing ball is left in a shaft, the inner bore of the sliding sleeve is smaller, the fracturing ball cannot return to the ground, and drilling off the fracturing ball is very difficult. One end of a main pipe of a main tee is fixedly connected with a fracturing tree connector, and the other end of the main tube is fixedly connected with a relief pipeline connector. The end of a branch pipe of the main tee is fixedly connected with a catching sleeve, and a locking cap is fixedly mounted at the other end of the catching sleeve. A pressure gauge is fixedly mounted on the main pipe of the main tee. An inner hole of one end of the main tee, provided with the fracturing tree connector, is provided with an inner projection, and a ball baffle is mounted between the inner projection and the fracturing tree connector. The ball baffle is provided with an axial guide hole. The fracturing wellhead ball catcher has the advantages that the catcher is reasonable in structure, simple to operate, high in compatibility and friendly to other constructions; the ball baffle is used to cut off the flow, the fracturing ball falls down under the action of self-weight, and accordingly fracturing wellhead ball catching is achieved.

Description

technical field [0001] The invention relates to an oil and gas well fracturing operation device, in particular to a fracturing wellhead ball-catching device for staged fracturing operations. Background technique [0002] With the continuous deepening of oilfield exploration and development and the increasing progress of mining technology, multi-layer, thin interbedded reservoirs and unconventional oil and gas reservoirs have become important blocks for increasing reserves and production, and staged fracturing technology is an important technical guarantee measure be widely used. The most important link in the string structure of the staged fracturing strings developed successively is the sandblasting sliding sleeve, which is usually opened by throwing balls, and the plugging and transfer of the downhole compressed layer can be realized by throwing balls of different diameters. The ball-pitching sleeve uses fracturing balls and ball seats to seal off the upper and lower well...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the ball-throwing sliding sleeve used in the transfer fracturing of the existing oil and gas wells, the fracturing ball remains in the wellbore after being put into production, the inner diameter of the sliding sleeve is reduced, the fracturing ball cannot return to the ground, and the operation of drilling and removing the fracturing ball is difficult. Big deficiency, the present invention provides a kind of fracturing well head ball catcher

Images