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CN-120844982-B - Hydraulic pipe scraper while drilling and application method thereof

CN120844982BCN 120844982 BCN120844982 BCN 120844982BCN-120844982-B

Abstract

The application relates to a hydraulic pipe scraper while drilling and a use method thereof, the device comprises an upper joint, a shell, a resetting device, a scraping device, a pushing device, a control device and an activating device. The reset device comprises a long inner shaft sleeve, a switchable long inner shaft, a spring sleeve, a reset spring, a spring ring and a spring guide block, the scraping device comprises a cutter block, a scraping plate and a cutter block baffle, the pushing device comprises a piston, a driving piece and a sleeve, the control device comprises a control short circuit, a track main shaft sleeve, a ball seat reset spring, a locking block sleeve and a locking block support sleeve, and the activating device comprises a middle short circuit, a ball seat, an activating ball, a ball blue and a lower joint. According to the application, the control device and the activating device are used for realizing the precise control on the scraping device, so that the pipe scraping efficiency and reliability are effectively improved, and the drilling cost is reduced.

Inventors

  • CAI WANWEI
  • WANG MINGHAO
  • DONG HAITAO

Assignees

  • 北京博德世达石油技术股份有限公司

Dates

Publication Date
20260512
Application Date
20250721

Claims (9)

  1. 1. The hydraulic pipe scraper while drilling is characterized by comprising the following components: An upper joint (1), wherein the upper joint (1) is connected with a drilling machine; The top end of the shell (2) is in threaded connection with the upper joint (1); The resetting device (3) is arranged inside the shell (2) and comprises an inner long shaft jacket (31) and a switchable inner long shaft (32), wherein the inner long shaft jacket (31) is connected with the shell (2) through threads, and the switchable inner long shaft (32) is arranged inside the inner long shaft jacket (31), is connected with the inner wall of the inner long shaft jacket (31) through threads and extends towards the bottom of the shell (2); a scraping device (4) arranged inside the shell (2) and positioned at the bottom of the resetting device (3) The pushing device (5) is arranged in the shell (2) and positioned at the bottom of the scraping device (4), and comprises a piston (51), wherein the piston (51) is sleeved outside the switchable long inner shaft (32); The control device (6) comprises a control short circuit (61) and a track main shaft (62), a track main shaft sleeve (63), a ball seat reset spring (64), a locking piece sleeve (65) and a locking piece support sleeve (66), wherein the control short circuit (61) is connected with the bottom of the shell (2) through threads, the track main shaft (62) is positioned in the control short circuit (61), the top of the track main shaft is sleeved outside the switchable long inner shaft (32), the inner wall of the top of the control short circuit (61) is attached to the outer wall of the track main shaft (62), and the track main shaft sleeve is sleeved outside the track main shaft (62); Activation device (7), set up controlling means (6) bottom, including middle short circuit (71), ball seat (72), activation ball (73), basket (74), middle short circuit (71) one end with control short circuit (61) are connected, and the other end is connected with lower clutch (75), basket (74) set up inside lower clutch (75), ball seat (72) set up inside middle short circuit (71), ball seat (72) top with track main shaft (62) threaded connection, mounting groove (721) of placing activation ball (73) are seted up to the bottom, a plurality of communicating rectangular groove (7211) with the bottom are seted up to mounting groove (721) circumference, reserve groove (711) are seted up to inside of middle short circuit (71), mounting groove (721) remove to behind reserve groove (711), rectangular groove (7211) scatter, open mounting groove (721), activation ball (73) drop to in basket (74).
  2. 2. The hydraulic while drilling pipe scraper according to claim 1, further comprising a sealing device (8) comprising a first groove (81) formed in one side of the long-axis jacket (31) corresponding to the shell (2), wherein a first sealing ring (811) and a retainer ring (812) are arranged in the first groove (81) to seal between the outer wall of the long-axis jacket (31) and the inner wall of the shell (2); the novel long-axis switch further comprises second grooves (82) formed in the long-axis outer sleeve (31), the second grooves (82) are formed in two along the length direction, first lip-shaped sealing pieces (821) are arranged in the second grooves (82), and the wall of the long-axis outer sleeve (31) is sealed with the outer wall of the switchable long-axis inner shaft (32); The piston also comprises a third groove (83) formed in the piston (51), a second lip seal (831) is arranged in the third groove (83), and the third groove and the switchable long inner shaft (32) form a seal; The piston also comprises a fourth groove (84) which is arranged on the inner part of the shell (2) and is arranged on the outer part of the piston (51), a third lip-shaped sealing piece (841) is arranged in the fourth groove (84), and the third lip-shaped sealing piece (841) forms a seal with the inner wall of the shell (2); the piston also comprises a fifth groove (85) formed in the outer side of the piston (51), a second sealing ring (851) is arranged in the fifth groove (85), and sealing is formed between the second sealing ring (851) and the inner wall of a driving piece (52) sleeved on the top of the outer side of the piston (51); The device further comprises two adjacent sixth grooves (86) which are sleeved with the switchable long inner shaft (32) and are positioned on the inner wall of the track main shaft (62), fourth lip-shaped sealing elements (861) are arranged in the sixth grooves (86), and the inner wall of the track main shaft (62) is sealed with the outer wall of the switchable long inner shaft (32); The control short circuit is characterized by further comprising a seventh groove (87) formed in the inner wall of the top of the control short circuit (61), wherein two adjacent grooves are formed in the seventh groove (87), a third sealing ring (871) is arranged in the seventh groove (87), and sealing is formed between the third sealing ring (871) and the outer wall of the track main shaft (62); The novel lock block is characterized by further comprising an eighth groove (88) formed in the outer side of the lock block sleeve (65), wherein a fourth sealing ring (881) is arranged in the eighth groove (88), and the inner wall of the control short circuit (61) is sealed through the fourth sealing ring (881); The novel lock block supporting device is characterized by further comprising a ninth groove (89) formed in the outer portion of the lock block supporting sleeve (66) and a tenth groove (810) formed in the inner portion of the lock block supporting sleeve, wherein a fifth sealing ring (891) and a sixth sealing ring (8101) are respectively arranged in the ninth groove (89) and the tenth groove (810), and the lock block supporting sleeve (66) is sealed with the lock block sleeve (65) and the track main shaft (62) respectively.
  3. 3. The hydraulic-while-drilling pipe scraper as claimed in claim 1, wherein the scraping device (4) comprises containing grooves (41) which are uniformly formed in the circumferential direction of the shell (2), the containing grooves (41) are formed in three in the circumferential direction of the shell (2), and the scraping device (4) is formed in three groups in the circumferential direction of the shell (2).
  4. 4. The hydraulic-while-drilling pipe scraper as claimed in claim 3, wherein the scraping device (4) comprises a scraping piece (42) arranged in the accommodating groove (41), the scraping piece (42) comprises a cutter block (421), a scraper (422) arranged outside the cutter block (421), an elastic piece (424) is further arranged between the cutter block (421) and the scraper (422), the elastic piece (424) comprises two types of small springs (4241) and a disc spring (4242) respectively, one end of the small spring (4241) is abutted with the scraper (422), the other end of the small spring (4241) is abutted with the cutter block (421), and the disc spring (4242) is fixed on the scraper (422) through a nail shaft (4243) through threaded connection.
  5. 5. The hydraulic pipe scraper while drilling according to claim 2, wherein the inner side sleeved by the switchable long inner shaft (32) is located in two adjacent sixth grooves (86) formed in the inner wall of the track main shaft (62), a plurality of flow through holes (321) are uniformly formed in the circumference of the switchable long inner shaft (32) below the sixth grooves (86), and the flow through holes (321) are opened and closed through movement of the track main shaft (62) to control liquid to enter the piston (51).
  6. 6. The hydraulic while drilling pipe wiper as set forth in claim 1 wherein the outer wall of the ball basket (74) is provided with a plurality of fluid inlet holes (741).
  7. 7. The hydraulic pipe scraper while drilling according to claim 1, wherein the track main shaft (62) is sleeved with a continuous sliding track (631) and comprises a long track (6311) and a temporary track (6312), the control device (6) is provided with a track control pin (67), the control short circuit (61) is provided with a pin hole through which the track control pin (67) passes, the track control pin (67) is fixedly installed in the pin hole, one end part positioned at the inner side of the control short circuit (61) is abutted with the sliding track, the wall of the pin hole is provided with two adjacent eleventh grooves (671), the eleventh grooves (671) are internally provided with a seventh sealing ring (672), the seventh sealing ring (672) seals the track control pin (67) with the pin hole, when the ball seat (72) drives the track main shaft (62) to move downwards, the track control pin (67) moves from the long track (6311) to the temporary track (6312), and the track main shaft (62) rotates to activate the track for one time.
  8. 8. The hydraulic while drilling pipe wiper as set forth in claim 1, wherein joint threads between the housing (2), the upper joint (1), the control short (61), the intermediate short (71) and the lower joint (75) are carbonitriding treated.
  9. 9. A method of using the hydraulic while drilling pipe wiper according to any one of claims 1 to 8, comprising the steps of: step one, connecting a hydraulic pipe scraper while drilling into a wellhead; step two, liquid reaches the lower part of the drill bit through the switchable inner long shaft and the track main shaft (62) in the drilling operation process of the hydraulic pipe scraper; Step three, when a pipe scraping operation is required, throwing an activating ball (73) to drive a ball seat (72) to move downwards through a drill string hydraulic lifting activating ball (73), wherein the tail part of the ball seat (72) is connected with a track main shaft (62) through threads, the track main shaft (62) is driven to move downwards together in the descending process of the ball seat (72), the track main shaft (62) can rotate, a track control pin (67) moves from a long track (6311) to a temporary track (6312), when the ball seat (72) moves downwards to a release space of an intermediate short circuit (71), the activating ball (73) is released, at the moment, under the pushing of a ball seat (72) reset spring (64), the track control pin (67) enters a short track from the temporary track (6312), at the moment, an overflow hole (321) reserved by a switchable long inner shaft (32) is activated, drill string liquid flows into a piston (51), a cutter block (421) of the piston (51) is pushed out of a shell (2), at the moment, the blade (422) contacts the inner wall of a sleeve to be cleaned, and the activating ball (73) falls into a ball basket; step four, pulling the drilling tool upwards or downwards to start pipe scraping operation; fifthly, the drilling tool can be rotated to carry out rotary scraping; Step six, after work is completed, putting the activation ball (73) into the drill string again to lift the activation ball (73) to drive the ball seat (72) to move downwards, wherein the tail of the ball seat (72) is connected with the track main shaft (62) through threads, the track main shaft (62) is driven to move downwards together in the descending process of the ball seat (72), the track main shaft (62) sleeve can rotate, the track control pin (67) moves from the short track to the temporary track (6312), when the ball seat (72) moves downwards to the release space of the middle short circuit (71), the activation ball (73) is released, at the moment, under the pushing of the reset spring (64) of the ball seat (72), the track control pin (67) enters the long track (6312), the overflow hole (321) reserved by the switchable long inner shaft (32) is closed, the activation ball (73) falls into the ball basket, and drill string liquid passes through the tool body and is retracted into the shell (2) under the action of the reset spring (34); step seven, the cleaning pipe wall is required to be activated again to execute the step two to the step six again; and step eight, taking out the wellhead while drilling to finish the operation.

Description

Hydraulic pipe scraper while drilling and application method thereof Technical Field The application relates to the technical field of oilfield tools, in particular to a hydraulic pipe scraper while drilling and a use method thereof. Background With the continuous development of drilling technology, deep wells and ultra-deep wells have become key directions for drilling development. Because of stratum conditions and complexity of construction process, a large amount of cement blocks, cement rings, hard wax, various salt crystals or sediments, perforation burrs, iron oxide and other dirt generated after the casing is rusted are often attached to the inner wall of the casing, and various downhole tools such as overshot, centralizer and packer cannot be smoothly put into the casing, and cleaning operation of the inner wall of the casing, namely pipe scraping operation, is generally adopted. In order to realize effective scraping operation, the conventional technical means is to lower a well-dredging drilling tool assembly to carry out well-dredging after well drilling is finished. After the pigging operation is finished, the pipe scraper is put into the pigging device to scrape the pipe, and most of the pipe scrapers at present adopt mechanical structures, and the pipe scrapers with the mechanical structures are in an activated state when being put into the well, and can be put into the well along with a drilling tool all the time, so that the pipe scrapers are extremely inconvenient. Because the pipe scraping operation is required to carry out the drill lifting operation and replace the drilling tool assembly, the process is complex, the period is long, and the cost is high. In order to reduce the cost and improve the drilling efficiency, how to realize the scraping of a pipe while drilling has become one of the technical problems to be solved in deep wells and ultra-deep wells. Disclosure of Invention In order to solve the problems, the application provides a hydraulic pipe scraper while drilling and a use method thereof. In a first aspect, the hydraulic pipe scraper while drilling provided by the application adopts the following technical scheme: a hydraulic while drilling wiper comprising: the upper joint is connected with the drilling machine; the shell is in threaded connection with the top end of the upper joint; the reset device is arranged in the shell and comprises an inner long shaft jacket, a switchable inner long shaft, a spring sleeve, a reset spring, a spring ring and a spring guide block, wherein the inner long shaft jacket is arranged in the shell and is fixedly connected with the inside of the shell through threads; the spring sleeve is arranged in the shell and is in threaded connection with the inside of the shell, and is positioned at the bottom end of the long inner shaft sleeve, the top end of the spring sleeve is abutted with the bottom end of the long inner shaft sleeve, and a return spring is arranged in the spring sleeve; The scraping device is arranged in the shell and positioned at the bottom of the resetting device and comprises a containing groove and a scraping piece, wherein the containing groove is uniformly formed in the shell in the circumferential direction, the scraping piece is arranged in the containing groove and comprises a cutter block, a scraping plate and a cutter block baffle, the scraping plate is arranged outside the cutter block, the cutter block baffle is used for fixing the scraping plate on the cutter block, an inclined chute is formed in the side wall of the containing groove, the position, close to the outer wall of the shell, of the chute faces upwards, the position, away from the outer wall of the shell, of the chute faces downwards, a sliding block corresponding to the chute is arranged on the side edge of the cutter block, and the cutter block is controlled to move towards or away from the central shaft of the shell through the relative movement of the chute and the sliding block; The pushing device is arranged in the shell and positioned at the bottom of the scraping device and comprises a piston, a driving piece and an outer sleeve, wherein the piston is sleeved outside the switchable long inner shaft; the driving piece is sleeved at the top position outside the piston and comprises a driving ring and a driving block, the driving ring is in threaded connection with the piston, the driving block is in threaded connection with the driving ring, and the driving block is positioned in the accommodating groove; The control device comprises a control short circuit, a track main shaft sleeve, a ball seat reset spring, a locking piece sleeve and a locking piece support sleeve, wherein the control short circuit is connected with the bottom of the shell through threads, the track main shaft is positioned in the control short circuit, and the top of the track main shaft is sleeved outside the switchable long inner shaft; the inner wall of the top of the control