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CN-121976754-A - Reamer with replaceable cutting teeth

CN121976754ACN 121976754 ACN121976754 ACN 121976754ACN-121976754-A

Abstract

The invention discloses a reamer with replaceable cutting teeth, which belongs to the technical field of underground reaming, and comprises a shell, wherein blade pieces are arranged on the shell, two ends of each blade piece are connected with cutting teeth groups applicable to different strata, each blade piece can swing by taking the blade piece as an axle center, a driving piece is arranged in the shell, the driving piece can axially slide along the shell through weight on bit, a conversion assembly is arranged between the shell and the driving piece and can rotate relative to the driving piece, and when the driving piece axially slides along the shell, the conversion assembly rotates relative to the driving piece, so that the two cutting teeth groups of the blade piece alternately extend out to switch cutting modes. When different cutting teeth are switched, the invention does not need to complete tripping operation, obviously shortens the auxiliary operation time of non-drilling, thereby improving the comprehensive drilling efficiency, and secondly, avoids the time cost, equipment loss and labor cost caused by frequent complete tripping operation, and effectively reduces the total drilling cost of a single well.

Inventors

  • LI ZHIGANG

Assignees

  • 天津新领地石油技术有限公司

Dates

Publication Date
20260505
Application Date
20260408

Claims (8)

  1. 1. The reamer with the replaceable cutting teeth is characterized by comprising a shell, wherein a cutter blade part is arranged on the shell, two ends of the cutter blade part are connected with cutting tooth groups applicable to different strata, the cutter blade part can swing by taking the cutter blade part as an axle center, a driving part is arranged in the shell, the driving part can axially slide along the shell through a bit pressure, a conversion assembly is arranged between the shell and the driving part and can rotate relative to the driving part, and when the driving part axially slides along the shell, the conversion assembly rotates relative to the driving part to enable the two cutting tooth groups of the cutter blade part to alternately extend so as to switch a cutting mode; The conversion assembly comprises a sleeve, the sleeve is sleeved on the driving piece, the peripheral wall of the sleeve is connected with a plurality of first convex blocks and a plurality of second convex blocks, and the first convex blocks and the second convex blocks are alternately abutted with the blade piece; when the first lug is abutted with the blade piece, the first cutting tooth group on the blade piece extends out of the shell, and the blade piece is in a first cutting mode; when the second lug is abutted with the blade piece, the second cutting tooth group on the blade piece extends out of the shell, and the blade piece is in a second cutting mode; The first protruding blocks and the second protruding blocks are respectively located on two sides of the sleeve, the positions of the first protruding blocks correspond to the first cutting tooth group ends of the blade pieces, and the positions of the second protruding blocks correspond to the second cutting tooth group ends of the blade pieces.
  2. 2. The reamer of replaceable cutting teeth of claim 1, wherein one end of the blade member is inlaid with a first set of cutting teeth adapted for soft formations, and one end of the blade member remote from the first set of cutting teeth is inlaid with a second set of cutting teeth adapted for hard formations, the blade member being provided with a first cutting mode, a second cutting mode and a retrieval mode; when the blade piece is in a first cutting mode, the first cutting tooth group extends out of the shell; when the blade piece is in the second cutting mode, the second cutting tooth group extends out of the shell; when the blade piece is in the retraction mode, the first cutting tooth set and the second cutting tooth set are retracted in the shell.
  3. 3. The reamer of replaceable cutting teeth of claim 1, wherein the housing has an open slot, the blade member is disposed in the open slot, the open slot has a rotating slot formed therein, the blade member is fixedly connected with a rotating rod, and the blade member is rotatably connected with the rotating slot through the rotating rod.
  4. 4. The reamer of replaceable cutting teeth of claim 1, wherein a plurality of first grooves and a plurality of second grooves are formed in the peripheral wall of the sleeve, a first gap is formed between adjacent first protrusions, the first grooves are formed in the axis of the first gap, a second gap is formed between adjacent second protrusions, the second grooves are formed in the axis of the second gap, the first grooves and the corresponding second protrusions are located on the same axis, and the second grooves and the corresponding first protrusions are located on the same axis; when the first lug is abutted with the first cutting tooth group end of the blade piece, the second cutting tooth group end of the blade piece is accommodated in the second groove; when the second lug is abutted with the second cutting tooth set end of the blade piece, the first cutting tooth set end of the blade piece is accommodated in the first groove.
  5. 5. A reamer having replaceable cutting teeth according to claim 3, wherein a third gap is provided between adjacent first projections and first recesses and between adjacent second projections and second recesses, and wherein the first and second sets of cutting teeth on the blade are retracted within the housing when the blade is in the third gap, the blade being in the retracted mode.
  6. 6. The reamer of replaceable cutting teeth of claim 1, wherein the sleeve defines a guide slot therein, the driving member having a driving pin fixedly coupled thereto, the driving pin being embedded in the guide slot for rotation of the sleeve upon axial movement of the driving member through interaction of the driving pin with the guide slot.
  7. 7. The reamer of replaceable cutting teeth of claim 5, wherein the guide slot has a plurality of peaks and a plurality of bottoms at both ends, the blade member being in either the first cutting mode or the second cutting mode when the drive pin is at the top of the guide slot and the blade member being in the retracted mode when the drive pin is at the bottom of the guide slot.
  8. 8. The reamer of claim 1, wherein the driving member is provided with a first connection portion, the driving member is connected to the drill bit via the first connection portion, the end of the housing remote from the first connection portion is provided with a second connection portion, and the housing is connected to the drill collar or the drill rod via the second connection portion.

Description

Reamer with replaceable cutting teeth Technical Field The invention belongs to the technical field of underground reaming, and particularly relates to a reamer with replaceable cutting teeth. Background In the process of deep resource exploration and development of modern petroleum, natural gas, geothermal energy and the like, the downhole reaming operation is an indispensable link in key processes such as adjusting the size of a borehole, performing open hole sidetracking, casing cementing and the like. The existing underground reamer can be mainly divided into two main types of fixed type and mechanical telescopic type according to the structure and the working principle of the existing underground reamer. The mechanical telescopic reamer extends out the blade through drilling fluid pressure or ball throwing and the like, so that the opening and closing of the reaming function are realized, but the blade is usually provided with only one type of cutting teeth, and the mechanical telescopic reamer has strong pertinence and weak adaptability. When encountering complex well sections with frequent changes of formation lithology in the drilling process, such as staggered drilling between hard sandstone and limestone and soft mudstone and shale, a single type of cutting teeth cannot simultaneously meet the requirements of effective crushing of the hard formation and efficient cutting of the soft formation, in order to cope with such a situation, a working crew has to frequently perform tripping operation, replace a reamer or the whole drilling tool combination suitable for the current formation, greatly prolong the drilling period, remarkably increase the drilling cost and increase the risk of downhole operation. Therefore, there is a need to design a reamer with replaceable cutting teeth to solve the above-mentioned problems. Disclosure of Invention The invention aims to provide a reamer with replaceable cutting teeth, which has the advantage of being capable of rapidly switching cutting modes according to stratum changes in an underground environment and solves the problems in the background art. In order to achieve the above purpose, the reamer with replaceable cutting teeth has the following technical scheme: The utility model provides a reamer of interchangeable cutting tooth, which comprises a housin, be equipped with the blade spare on the casing, the both ends of blade spare are connected with the cutting tooth group that is suitable for different stratum, the blade spare can self be the axle center swing, be equipped with the driving piece in the casing, the driving piece can follow casing axial slip through the weight on bit, be equipped with conversion component between casing and the driving piece, conversion component can rotate relative driving piece, when the driving piece slides along the casing axial, conversion component rotates relative driving piece, make two cutting tooth groups of blade spare stretch out in turn, with the switching cutting mode. Further, a first cutting tooth group suitable for a soft stratum is inlaid at one end of the blade piece, a second cutting tooth group suitable for a hard stratum is inlaid at one end of the blade piece, which is far away from the first cutting tooth group, and the blade piece is provided with a first cutting mode, a second cutting mode and a retraction mode; when the blade piece is in a first cutting mode, the first cutting tooth group extends out of the shell; when the blade piece is in the second cutting mode, the second cutting tooth group extends out of the shell; when the blade piece is in the retraction mode, the first cutting tooth set and the second cutting tooth set are retracted in the shell. Further, be equipped with the open slot on the casing, the sword spare is located the open slot in, has seted up the change groove on the open slot, fixedly connected with bull stick on the sword spare, and the sword spare passes through bull stick and changes the inslot rotation and is connected. Further, the conversion assembly comprises a sleeve, the sleeve is sleeved on the driving piece, the peripheral wall of the sleeve is connected with a plurality of first convex blocks and a plurality of second convex blocks, and the first convex blocks and the second convex blocks are alternately abutted with the blade piece; when the first lug is abutted with the blade piece, the first cutting tooth group on the blade piece extends out of the shell, and the blade piece is in a first cutting mode; When the second lug is abutted with the blade piece, the second cutting tooth group on the blade piece extends out of the shell, and the blade piece is in a second cutting mode. Further, the first protruding blocks and the second protruding blocks are respectively located on two sides of the sleeve, the positions of the first protruding blocks correspond to the first cutting tooth set ends of the blade pieces, and the positions of the second protruding blocks cor