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CN-121593781-B - Integrated near-bit measuring tool

CN121593781BCN 121593781 BCN121593781 BCN 121593781BCN-121593781-B

Abstract

The invention provides an integrated near-bit measuring tool which comprises a wire passing screw body and a variable extension nipple which are sequentially arranged from bottom to top, wherein a measuring nipple is arranged in the wire passing screw body, a near-bit measuring bin is arranged in the measuring nipple, a measuring module is arranged in the bin, the measuring module passes through the variable extension nipple to an MWD nipple through a communication wire, the variable extension nipple comprises a core body, an outer cylinder, an adjustable nipple, a locking nipple, a hanging piece and a communication assembly, the outer cylinder is fixed on the core body, the lower part of the core body is positioned in the outer cylinder, the upper end of the locking nipple is connected with the outer cylinder, the hanging piece is arranged at the lower end of the locking nipple, the adjustable nipple is fixed on the core body, a spring seat is arranged between the upper end of the adjustable nipple and the core body, a limit spring is arranged on the spring seat, an adjusting seat is arranged between the lower end of the adjustable nipple and the locking nipple, a slip ring and a gasket are arranged on the adjusting seat, and the communication assembly comprises the communication wire. The invention reduces the fracture risk of the drilling tool and improves the drilling safety.

Inventors

  • WANG YUSONG
  • PENG ZHENGDE
  • WANG YANG
  • FENG SIHENG
  • CHEN DONG
  • LI ZHILIN
  • LIU WEI
  • LIAN TAIWEI
  • PENG HUA
  • LUO JIANG

Assignees

  • 中国石油集团川庆钻探工程有限公司
  • 中国石油天然气集团有限公司

Dates

Publication Date
20260508
Application Date
20260127

Claims (14)

  1. 1. An integrated near-bit measuring tool is characterized by comprising a wire-passing screw body (2) and a variable extension nipple (301) which are sequentially arranged from bottom to top, The measuring nipple (204) is arranged in the wire-passing screw body (2), and the measuring nipple (204) is positioned at the lower part of the tool, a near-bit measuring bin (205) is arranged in the measuring nipple (204), a measuring module (210) is arranged in the near-bit measuring bin (205), and the measuring module (210) is configured to collect near-bit well deviation azimuth and gamma parameter information; The variable extension nipple (301) comprises a core (3013), an outer barrel (3014), an adjustable nipple (30116), a locking nipple (3015), a hanging piece (3017) and a communication assembly, wherein the outer barrel (3014) is fixed on the core (3013) through threads, the lower part of the core (3013) is positioned in the outer barrel (3014), the upper end of the locking nipple (3015) is fixed on the outer barrel (3014) through threads, the hanging piece (3017) is fixed at the lower end of the locking nipple (3015) in a sealing mode, the adjustable nipple (30116) is fixed on the core (3013) through threads, and the adjustable nipple (30116) can move up and down along the axial direction of the core (3013); the upper end of the adjustable nipple (30116) is positioned between the outer cylinder (3014) and the core (3013), the lower end of the adjustable nipple is positioned in the locking nipple (3015), a spring seat (30127) is arranged between the upper end of the adjustable nipple (30116) and the core (3013), a limit spring (30114) is coaxially arranged on the spring seat (30127), an adjusting seat (30128) is arranged between the lower end of the adjustable nipple (30116) and the locking nipple (3015), a sliding ring (30119) and a gasket (30118) for limiting the axial displacement of the adjustable nipple (30116) are coaxially arranged on the adjusting seat (30128), and the communication assembly is respectively and tightly fixed on the core (3013), the adjustable nipple (30116), in locking nipple joint (3015) and the hooking piece (3017), the communication assembly includes communication line (30115).
  2. 2. The integrated near-bit measurement tool of claim 1, wherein the measurement module (210) comprises a gamma measurement module, a well deviation measurement module and a central control circuit module, a plurality of circumferentially distributed near-bit measurement chambers (205) are arranged in the measurement nipple (204), and different measurement modules (210) are respectively arranged in different near-bit measurement chambers (205).
  3. 3. The integrated near-bit measuring tool of claim 1, wherein a first inner boss (30142) is arranged at the middle lower part of the adjustable nipple (30116), the core (3013) is located above the first inner boss (30142), a second inner boss (30139) is arranged at the middle part of the locking nipple (3015), and the adjustable nipple (30116) and the hanging piece (3017) are respectively located at the upper end and the lower end of the second inner boss (30139).
  4. 4. The integrated near-bit measuring tool according to claim 3, wherein a triple sealing structure is arranged between the locking nipple (3015) and the hanging piece (3017), the first triple sealing structure is realized through a fourth sealing ring (30134) and a high-pressure check ring (30135) which are fixedly arranged between the locking nipple (3015) and the hanging piece (3017), the second triple sealing structure is realized through a slope sealing surface (30136) which is in compaction contact with each other between the locking nipple (3015) and the hanging piece (3017), the third triple sealing structure comprises a special-shaped sealing sleeve (30132) fixed on a second inner boss (30139) and an arc top (30133) arranged at the upper end of the hanging piece (3017), and the third triple sealing structure is realized through the arc top (30133) in compaction contact with the special-shaped sealing sleeve (30132).
  5. 5. The integrated near-bit measurement tool of claim 3, wherein the communication assembly further comprises a multi-core conversion assembly, a plugging assembly, and a multi-core socket (30137), the multi-core conversion assembly is fixed at the upper end of the core (3013), the multi-core socket (30137) is fixed at the upper part of the hanging piece (3017), the plugging assembly is located in the adjustable nipple (30116) and is abutted between the first inner boss (30142) and the second inner boss (30139), and the communication line (30115) is connected with the multi-core conversion assembly and the plugging assembly respectively.
  6. 6. The integrated near-bit measurement tool of claim 5, wherein the multi-core conversion assembly comprises an upper adapter (30110), an aviation plug (3018), a fixing screw (3019), a lower adapter (30120), a first sealing ring (30121) and a high-pressure sealing plug (30111), the upper adapter (30110) comprises a mounting part, a threaded connection section (30123) and a sealing groove (30124) with the inner diameter decreasing sequentially from top to bottom, the upper adapter (30110) is fixed in a core (3013) through the threaded connection section (30123), the first sealing ring (30121) is fixed in the sealing groove (30124), the mounting part is located outside the core (3013), a threaded hole (30122) is formed in the mounting part, the aviation plug (3018) is fixed on the mounting part through the fixing screw (3019) and the threaded hole (30122), the lower adapter (30120) is fixed at the lower end of the upper adapter (30110), the high-pressure sealing plug (30111) is fixed between the upper adapter (30110) and the lower adapter (20), and the upper adapter (30115) enters the aviation plug (3018) through the upper adapter (3018).
  7. 7. The integrated near-bit measurement tool of claim 6, wherein a first inner step (30112) for axially limiting the lower adaptor (30120) is provided in the core (3013), and a second inner step (30126) for axially limiting the multi-core socket (30137) is provided in the hooking member (3017).
  8. 8. The integrated near-bit measuring tool of claim 5, wherein the plugging assembly comprises a plug bush (30141), a compression spring (30130), a limiting ring (30140), a fixed gland (30131) and a multi-core plug (30138) used for being connected with a multi-core socket (30137), an upper positioning ring table and a middle positioning ring table are respectively arranged on the upper part of the plug bush (30141), the upper positioning ring table is abutted against a first inner boss (30142), the compression spring (30130) is sleeved on the plug bush (30141) and is positioned between the first inner boss (30142) and the middle positioning ring table, the limiting ring (30140) is fixed at the lower part of the plug bush (30141) in a threaded mode, the multi-core plug (30138) is fixed at the lower end of the plug bush (30141) through the limiting ring (30140), the fixed gland (30131) is fixed at the lower end of the adjustable short joint (30116) in a threaded mode and used for axially limiting the limiting ring (30140), and the lower end of a communication wire (15) is connected with the multi-core plug (30138) after passing through the plug bush (30141).
  9. 9. The integrated near-bit measurement tool of claim 8, wherein a positioning block (30143) is fixed between the first inner boss (30142) and the core body (3013), an inner diameter of the positioning block (30143) is smaller than an inner diameter of the first inner boss (30142), and the positioning block (30143) abuts against the upper positioning ring table.
  10. 10. The integrated near-bit measuring tool according to claim 1, wherein the core (3013) is provided with a short thread section, a sealing section and a long thread section (30125) in sequence from the middle to the surface, the outer barrel (3014) is fixed on the core (3013) through the short thread section, the adjustable short section (30116) is fixed on the core (3013) through the long thread section (30125), and a second sealing ring (30113) is fixed between the outer barrel (3014) and the core (3013) through the sealing section.
  11. 11. The integrated near-bit measurement tool of claim 1, wherein a third sealing ring (30117) is arranged between the locking nipple (3015) and the adjustable nipple (30116), and the third sealing ring (30117) is located above the adjusting seat (30128).
  12. 12. The integrated near-bit measurement tool of claim 1, wherein the MWD sub comprises a directional probe (302), a power module (303), and a drilling fluid pulser (304) sequentially disposed from bottom to top, the power module (303) powering the drilling fluid pulser (304), the directional probe (302), and the measurement module (210) of the near-bit measurement chamber (205).
  13. 13. The integrated near-bit measurement tool of claim 12, wherein an adapter nipple (3011) for connecting with the directional probe (302) is screwed on the upper end of the core (3013), and a sleeve centralizer (3012) is fixed on the adapter nipple (3011).
  14. 14. The integrated near-bit measuring tool of claim 1, wherein the adjustable nipple (30116) is provided with an upper step at an upper portion thereof by decreasing an outer diameter and a lower step at a lower portion thereof by decreasing an outer diameter, the spring seat (30127) is formed by the upper step being engaged with an outer step pre-opened on the core (3013), and the adjustment seat (30128) is formed by the lower step being engaged with an inner step pre-opened on the locking nipple (3015).

Description

Integrated near-bit measuring tool Technical Field The invention relates to the technical field of petroleum drilling engineering tools, in particular to an integrated near-bit measuring tool. Background In petroleum and natural gas drilling engineering, along with the improvement of exploitation demands, technicians need to know the change condition of geological engineering information more timely, and the method can adjust the well track in time, and is particularly significant for identifying thin oil layers and improving drilling efficiency. Currently, conventional remote while drilling gamma logging tools are typically located in a while drilling measurement instrument string that is connected after a screw power drill. However, it has been found from the actual drilling operation that the remote gamma logging while drilling tool station is a relatively large distance from the drill bit, resulting in measurement information lag. When a reservoir is found, the drill bit often has drilled a significant distance. Therefore, the problems of track adjustment lag, low drilling rate of the reservoir and the like are faced in the geosteering well drilling of the transverse variability thin reservoir, and particularly, the problem that the drilling rate of the reservoir is low in the thin oil layer or the reservoir with high track requirement, such as the difficulty that the well track passes out of the stratum and is readjusted back into the reservoir is high, can not meet the requirements of accurate control and geosteering of the well track. Meanwhile, the conventional screw has large bending point distance, so that the sliding drilling build-up rate is low, and the centralizer has long distance, so that the composite slope stabilization and build-up rate are low. To address the above issues, near bit measurement while drilling systems have been developed. The method can effectively realize quick and accurate calculation of inversion logging-while-drilling geological parameters, can accurately reflect the well bottom condition in real time, accurately judge the upper and lower boundaries of the oil layer, guide field engineers to timely optimize the real drilling track, and improve the drilling meeting rate of high-quality reservoirs. But in the production application process, the problem of low measurement stability under the high-rotation-speed and high-vibration environment of the driving head of the power drilling tool is exposed. In addition, in the process of acquiring formation information such as resistivity, neutron density and the like, a Logging While Drilling (LWD) system is required to rely on MWD communication to upload data to the ground, so that stable connection of a mechanical structure between the logging while drilling system and the ground is important. The conventional connecting device used between the existing logging while drilling tool and the MWD generally has the problems that the conventional connecting device is of a dynamic sealing structure, namely, the conventional connecting device is matched with a telescopic rod through a movable outer barrel and internally provided with a dynamic sealing ring, the telescopic rod moves back and forth in a tiny range relative to the dynamic sealing ring under the influence of underground high-frequency vibration, the dynamic sealing ring is easy to damage, drilling fluid is easy to leak due to high-pressure sealing failure under long-time operation, the conventional connecting device is often subjected to size adjustment at intervals of about ten millimeters, the lengths of a non-magnetic drill collar and a non-magnetic suspension are required to be specially customized, and the flexible disposal capability is low for special conditions such as drilling tool repair and buckling and instrument accessory replacement. Therefore, it is of great importance to provide an integrated near-bit measurement tool. The application number of the Chinese patent application is CN201420734804.X, the name of the near-bit inclinometer is near-bit inclinometer, the near-bit inclinometer consists of ground information processing equipment, an MWD inclinometer, a near-bit measuring nipple, a near-bit receiving nipple and an MWD receiving nipple, the MWD receiving nipple is arranged in an MWD inclinometer system, a magnetic signal conversion device is arranged in the range of a magnetic induction transmitting coil of the near-bit receiving nipple, the MWD inclinometer is arranged at the upper end of the near-bit inclinometer, the near-bit measuring nipple is arranged between a drill bit and a screw through threads, and the near-bit receiving nipple is arranged between the screw and a non-magnetic drill collar through threads. The near-bit measuring nipple and the near-bit receiving nipple are in wireless communication across a small gap of the screw rod, data are transmitted to the near-bit receiving nipple through mud, the near-bit receiving nipple adopts a wir