Damping centering guide structure for inclined shaft screw drill

Abstract

The invention discloses a damping centering guide structure for an inclined shaft screw drill. The damping centering guide structure for the inclined shaft screw drill comprises a screw drill axial shell and a connector body connected with the upper end of the screw drill axial shell, and a limiting groove is formed in the middle portion of the connector body. The connector body in the limiting groove is slidably sleeved with a nylon centering guide casing pipe. A plurality of buffering cavities are evenly formed in the outer side of the nylon centering guide casing pipe. Limiting cavities are formed in the two sides of each buffering cavity. Convex ribs are slidably arranged in the buffering cavities respectively. Limiting blocks matched with the limiting cavities are arranged on the two sides of one end of each convex rib respectively, and the other end of each convex rib extends out of the nylon centering guide casing pipe. A plurality of spring grooves are evenly formed in the inner side of each convex rib. Springs matched with the spring grooves are arranged in the spring grooves in the radial direction. The inner sides of the springs abut against the nylon centering guide casing pipe, the outer sides of the springs abut against the convex ribs, and the outer surfaces of the convex ribs are higher than the outer surface of the screw drill axial shell and the outer surface of the connector body.

Description

technical field [0001] The invention relates to a petroleum machinery, in particular to a shock-absorbing centralizer structure of a screw drilling tool for an inclined well. Background technique [0002] Petroleum resources are a non-renewable resource. With the increasing potential of oil production efficiency control, drilling and workover operations in oilfields gradually extend to deeper and more complex geology. There are more and more inclined wells, horizontal wells and measure wells, some of which are Due to the imperfect drilling technology, some of them are required by the operation. Due to the deformation, bending and oblique extension of the casing, when the ordinary drilling tools are lifted and lowered, they will often hit the casing wall and cause damage to the drilling tools. At the same time, sediment and wax deposits are easy to accumulate in the casing. , Seriously affect the use of screw drilling tools. Contents of the invention [0003] The technical...

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Problems solved by technology

[0002] Petroleum resources are a non-renewable resource. With the increasing potential of oil production efficiency control, drilling and workover operations in oilfields gradually extend to deeper and more complex geology. There are more and more inclined wells, horizontal wells and measure wells, some of which are Due to the imperfect drilling technology, some are required by the operation. Due to the deformation, bending and oblique extension of the casing, when the ordinary drilling tools are lifted and lowered, they will often hit the casing wall and cause damage to the drilling tools. At the same time, sediment and wax deposits are easy to accumulate in the casing. , which seriously affects the use of screw drilling tools

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