Damping centering guide structure for inclined shaft screw drill

Abstract

The invention discloses a vibration-absorbing centralizer structure for a screw drilling tool in an inclined well, which comprises: an axial shell of the screw drilling tool and a joint body connected with the upper end of the axial shell of the screw drilling tool, and the middle part of the joint body is arranged There is a limit slot, and a nylon centralizer sleeve is slidably sleeved on the joint body in the limit slot, and a number of buffer cavities are uniformly arranged on the outside of the nylon centralizer sleeve, and on both sides of the buffer cavity Limiting cavities are provided respectively, and convex ribs are respectively slidably arranged in the buffer cavities. Limiting blocks cooperating with the limiting cavities are respectively arranged on both sides of one end of the protruding ribs. The other end of the protruding ribs extends Out of the nylon centralizer sleeve, a number of spring grooves are evenly arranged on the inner side of the convex rib, and a spring that cooperates with it is arranged radially in the spring groove, the inner side of the spring is against the nylon centralizer sleeve, and the outer side of the spring is in contact with the convex rib. The ribs offset each other, and the outer surface of the convex rib is higher than the outer surface of the axial shell of the screw drilling tool and the joint 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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