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CN-121993071-A - Coring equipment and righting tool thereof

CN121993071ACN 121993071 ACN121993071 ACN 121993071ACN-121993071-A

Abstract

The embodiment of the application provides a coring device and a centralizing tool thereof, wherein the centralizing tool comprises a centralizing main body, a piston part and a plurality of centralizing parts, an overflow cavity is defined in the centralizing main body, the plurality of centralizing parts are arranged along the circumferential direction of the centralizing main body, each centralizing part can be slidably arranged on the centralizing main body along the radial direction of the centralizing main body, the piston part can be slidably arranged in the overflow cavity along the axial direction of the centralizing main body, and a plurality of extrusion blocks which are in one-to-one correspondence with the centralizing parts are arranged on the piston part. The centralizing tool can skillfully utilize the power of drilling fluid to drive the piston part to move, so that a plurality of centralizing parts are driven to prop against the wall of the well, the centralizing effect is achieved, the number of parts is small, the installation is simple, and the centralizing effect is better.

Inventors

  • JIAO YANG
  • ZHU QIANQIAN
  • WANG YU
  • ZHAO JUNFA
  • LIU JINLIANG
  • SU ZHIKUN
  • GUO RAN
  • LIU YIBO
  • CHEN LIDA
  • YUAN YAZHENG
  • LIU SHUWAN
  • GUAN SHIQUAN
  • XIE MENGYU

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团长城钻探工程有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1. A centralizing tool for centralizing a drilling tool, comprising: -a centralizer body (100), the centralizer body (100) being for connection to the drilling tool, an interior of the centralizer body (100) defining an overflow chamber (110); A plurality of centralizing portions (200), a plurality of the centralizing portions (200) being arranged along a circumferential direction of the centralizing body (100), and each centralizing portion (200) being slidably provided to the centralizing body (100) along a radial direction of the centralizing body (100); a piston part (300), wherein the piston part (300) is slidably arranged in the flow-through cavity (110) along the axial direction of the centralizing main body (100), and a plurality of extrusion blocks (400) which are in one-to-one correspondence with a plurality of centralizing parts (200) are arranged on the piston part (300); The centralizing tool is configured such that when drilling fluid is introduced into the flow passage chamber (110), the drilling fluid causes the piston portion (300) to slide along the axial direction of the centralizing body (100) so as to drive the plurality of centralizing portions (200) to slide along the radial outer side of the centralizing body (100) by using the plurality of extrusion blocks (400), so that the plurality of centralizing portions (200) are abutted against the wall of the well, thereby centralizing the drilling tool in the well.
  2. 2. The righting tool in accordance with claim 1, The plurality of pressing blocks (400) are provided on the outer circumference of the piston part (300), and, Each of the pressing blocks (400) has a pressing slope (410), and the pressing slope (410) is arranged to gradually contract toward an outer wall of the piston portion (300) in a direction in which the piston portion (300) approaches the righting block (220).
  3. 3. The righting tool in accordance with claim 1, The outer wall of the piston part (300) is provided with a plurality of limit grooves (310), the limit grooves (310) are in one-to-one correspondence with the righting parts (200), and each limit groove (310) extends along the axial direction of the righting main body (100); At least part of the righting part (200) is positioned in the limit groove (310); The plurality of extrusion blocks (400) are respectively arranged on the plurality of limit grooves (310).
  4. 4. The righting tool in accordance with claim 1, The centralizing body (100) is provided with a plurality of through holes (120) which are arranged at intervals along the circumferential direction, the through holes (120) are in one-to-one correspondence with the centralizing parts (200), and Each of the righting segments (200) further comprises: a driving block (210), wherein the driving block (210) is penetrated through the through hole (120); -a righting block (220), said righting block (220) being external to said righting body (100) and being connected to said drive block (210).
  5. 5. The righting tool in accordance with claim 4, The outer wall of the centralizing main body (100) is also provided with a plurality of accommodating grooves (130), and the accommodating grooves (130) are communicated with the plurality of through holes (120) in a one-to-one correspondence manner; At least part of the righting block (220) is located in the receiving slot (130).
  6. 6. The righting tool of any one of claims 1 to 5, further comprising: The ball throwing part (500), the ball throwing part (500) set up in overflow chamber (110), ball throwing part (500) include ball throwing (510), ball throwing part (500) are configured to under the impact of drilling fluid to overflow chamber (110) release ball throwing (510), so that ball throwing (510) get into drilling tool.
  7. 7. The righting tool of claim 6, wherein the ball striking portion (500) further comprises: the ball throwing device comprises a ball throwing main body (520), wherein a ball throwing cavity (522) for accommodating the ball throwing device (510) is defined in the ball throwing main body (520), and a ball throwing port (524) for communicating the overflow cavity (110) with the ball throwing cavity (522) is formed in the ball throwing main body (520); The centralizer is configured such that when drilling fluid is introduced into the flow chamber (110), at least a portion of the drilling fluid enters the ball-throwing chamber (522) to cause the ball-throwing (510) to move to the ball-throwing port (524) and be thrown into the flow chamber (110) by the ball-throwing port (524).
  8. 8. The righting tool of claim 7, wherein the ball striking portion (500) further comprises: A support frame (530), wherein the support frame (530) is slidably arranged in the ball-throwing cavity (522) towards the ball-throwing port (524) and is used for supporting the ball throwing (510); And the supporting spring (540) is arranged in the ball throwing cavity (522) and sleeved on the supporting frame (530) so as to elastically support the supporting frame (530).
  9. 9. The righting tool in accordance with claim 7, The ball throwing main body (520) is arranged on the peripheral wall of the flow passage cavity (110); The righting tool further comprises: The liquid flow distribution part (600), the liquid flow distribution part (600) set up in overflow chamber (110), be located in the feed liquor of throwing ball part (500) is upstream, liquid flow distribution part (600) have sprue (610) and auxiliary flow way (620), sprue (610) are used for switching on overflow chamber (110) are in the upper and lower stream of liquid flow distribution part (600), the export of auxiliary flow way (620) is towards the uncovered of throwing ball main part (520) in order to direct at least part drilling fluid to throw ball chamber (522).
  10. 10. A coring apparatus comprising a righting tool in accordance with any one of claims 1 to 9.

Description

Coring equipment and righting tool thereof Technical Field The application relates to the field of oil extraction equipment, in particular to core-taking equipment and a centralizing tool thereof. Background The centralizer is a tool for stabilizing a downhole drilling tool and playing a role in preventing inclination, and is widely applied to petroleum, natural gas and geological exploration drilling engineering. A centralizer has been developed in the related art, which has a centralizer body and a plurality of centralizer blocks provided on the centralizer body, the plurality of centralizer blocks protrude out of the centralizer body, and are abutted against a well wall by the plurality of centralizer blocks, thereby achieving a centralizing effect, and supporting the plurality of centralizer blocks by a plurality of springs. However, the centralizer in the related art not only requires a large number of springs, has a large number of parts and is complex to install, but also has weak supporting force provided by the springs, and has an unsatisfactory centralizing effect under high-strength operation in the drilling process. Disclosure of Invention The embodiment of the application provides a centralizing tool, which has the advantages of less parts, simple installation and more stable centralizing effect. In a first aspect, an embodiment of the application provides a centralizing tool for centralizing a drilling tool, the centralizing tool comprising a centralizing body for connecting with the drilling tool, a plurality of centralizing portions arranged along the circumferential direction of the centralizing body and each slidably disposed on the centralizing body along the radial direction of the centralizing body, a piston portion slidably disposed on the overflow cavity along the axial direction of the centralizing body and provided with a plurality of extrusion blocks in one-to-one correspondence with the plurality of centralizing portions, the centralizing tool being configured such that when drilling fluid is introduced into the overflow cavity, the drilling fluid causes the piston portion to slide along the axial direction of the centralizing body to drive the plurality of centralizing portions to slide along the radial direction of the centralizing body by the plurality of extrusion blocks so as to cause the plurality of centralizing portions to abut against a wall of the well in the well, thereby centralizing the drilling tool in the well. In one possible embodiment, a plurality of pressing blocks are provided on the outer periphery of the piston portion, and each pressing block has a pressing slope that is provided to gradually contract toward the outer wall of the piston portion in a direction in which the piston portion approaches the righting block. In one possible implementation manner, a plurality of limit grooves are formed on the outer wall of the piston part, the limit grooves are in one-to-one correspondence with the plurality of centralizing parts, each limit groove extends along the axial direction of the centralizing main body, at least part of the centralizing part is located in each limit groove, and the plurality of extrusion blocks are respectively arranged in the plurality of limit grooves. In one possible implementation, the centralizing body is provided with a plurality of through holes which are arranged at intervals along the circumferential direction, the through holes are in one-to-one correspondence with the centralizing parts, and each centralizing part further comprises a driving block which penetrates through the through holes, and the centralizing block is positioned outside the centralizing body and connected with the driving block. In one possible implementation, the outer wall of the centralizing body is further formed with a plurality of accommodating grooves which are communicated with the plurality of through holes in a one-to-one correspondence manner, and at least part of the centralizing block is positioned in the accommodating grooves. In one possible embodiment, the centralizer further includes a ball striking portion disposed in the flow chamber, the ball striking portion including a ball striking, the ball striking portion configured to release the ball striking toward the flow chamber upon impact of the drilling fluid to cause the ball striking to enter the well tool. In one possible implementation, the ball throwing part further comprises a ball throwing body, wherein a ball throwing cavity for accommodating a ball is defined in the ball throwing body, a ball throwing port for connecting the flow cavity and the ball throwing cavity is formed in the ball throwing body, and the centralizing tool is configured such that when drilling fluid is introduced into the flow cavity, at least part of the drilling fluid enters the ball throwing cavity to promote the ball throwing to move to the ball throwing port, and the drilling fluid is thrown into the flow cav