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CN-121976764-A - Friction belt type tooth trace-free hydraulic power tongs

CN121976764ACN 121976764 ACN121976764 ACN 121976764ACN-121976764-A

Abstract

The invention relates to the technical field of drilling, in particular to a friction belt type tooth trace-free hydraulic power tongs. The problem that current casing tongs can harm the sleeve pipe surface when screwing up the sleeve pipe is mainly solved. The friction belt type toothless hydraulic power tongs comprise a supporting seat (5) and a motor (1), wherein the motor (1) is fixed above the supporting seat (5), an output shaft of the motor (1) is connected with a driving shaft (4), a chain wheel is connected to the driving shaft (4), a transmission chain (16) is connected to the chain wheel, two clamping arms (12) are connected to the supporting seat (5), the clamping arms (12) are driven by a hydraulic cylinder, the transmission chain (16) bypasses the two clamping arms (12) and then is in contact with a sleeve, a hydraulic arm (15) is connected to the supporting seat (5), and the end part of the hydraulic arm (15) is supported on the transmission chain (16). The friction belt type tooth trace-free hydraulic power tongs can not damage a sleeve, so that the operation is labor-saving, and the operation efficiency of the sleeve tongs is improved.

Inventors

  • ZHU MINGKUN
  • BAI XIAOJIE
  • DUAN LIJUN
  • SUN SHIXUN
  • QI YUE
  • ZHANG ZHENHUA
  • MA XIAOWEI
  • LV HE
  • YU CHENGLONG
  • WAN FAMING
  • ZHAO ZHIXUE
  • LIU PENGCHENG

Assignees

  • 大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
20260505
Application Date
20241025

Claims (9)

  1. 1. The friction belt type tooth trace-free hydraulic power tongs comprise a supporting seat (5) and a motor (1), wherein the motor (1) is fixed above the supporting seat (5), and the friction belt type tooth trace-free hydraulic power tongs are characterized in that an output shaft of the motor (1) is connected with a driving shaft (4), the driving shaft (4) is connected with a chain wheel, a transmission chain (16) is connected with the chain wheel, two clamping arms (12) are connected to the supporting seat (5), the clamping arms (12) are driven by a hydraulic cylinder, the transmission chain (16) bypasses the two clamping arms (12) and then is in contact with a sleeve, the supporting seat (5) is connected with a hydraulic arm (15), and the end part of the hydraulic arm (15) is supported on the transmission chain (16).
  2. 2. The friction belt type tooth trace-free hydraulic power tongs as claimed in claim 1, wherein the transmission chain (16) comprises a chain (161), and a belt (162) is arranged outside the chain (161).
  3. 3. The friction belt type tooth trace-free hydraulic power tongs according to claim 1 or 2, wherein the end part of the clamping arm (12) is connected with a round clamping plate (11) corresponding to a transmission chain (16), and when the clamping arm (11) clamps a sleeve, the transmission chain (16) bypasses the clamping plates (11) at two sides and then the belt (162) at the outer side of the transmission chain is contacted with the sleeve.
  4. 4. A friction belt type toothless hydraulic power tong as claimed in claim 3, characterized in that a torque monitor (17) is fixed outside the support seat (5).
  5. 5. The friction belt type tooth trace-free hydraulic power tongs as claimed in claim 4, wherein one end of the transmission shaft (4) is connected to an output shaft of the motor (1), the other end of the transmission shaft is connected to a bearing seat through a bearing, and the bearing seat is fixed on a supporting seat (5).
  6. 6. The friction belt type tooth trace-free hydraulic power tongs as claimed in claim 5, wherein the number of the transmission chains (16) is 2, the transmission chains are arranged up and down along the driving shaft (4), the number of the hydraulic arms (15) is 2, and each transmission chain (16) corresponds to one hydraulic arm (15).
  7. 7. The friction belt type tooth trace-free hydraulic power tongs as claimed in claim 6, wherein 2 chain wheels are arranged on the driving shaft (4), and each chain wheel is connected with a transmission chain (16).
  8. 8. The friction belt type toothless hydraulic power tongs according to claim 5 or 6, characterized in that the bottom of the supporting seat (5) is connected with a back-up wrench (7) through a fixed pin shaft (6), the bottom of the back-up wrench (7) is fixed on the back-up wrench supporting seat (8), two back-up wrench clamping arms (10) are arranged on the back-up wrench (7), and a back-up wrench hydraulic cylinder (9) is connected between the two back-up wrench clamping arms (10).
  9. 9. The friction belt type toothless hydraulic power tongs of claim 8, wherein in use, the back-up tong support seat (8) is placed on a wellhead so that the back-up tong clamping arms (10) clamp casing joints; Connecting the sleeve to a sleeve coupling, starting a hydraulic cylinder of a clamping arm (12), and enabling the clamping arm (12) to drive a transmission chain (16) to clamp the sleeve; starting a hydraulic cylinder of the hydraulic arm (15), and extending the hydraulic arm (15) outwards to tightly expand the transmission chain; The motor (1) is started to drive the driving shaft (4) to rotate, and the driving shaft (4) drives the transmission chain (16) to rotate through the chain wheel, so that the sleeve is driven to rotate.

Description

Friction belt type tooth trace-free hydraulic power tongs Technical Field The invention relates to the technical field of drilling, in particular to a friction belt type tooth trace-free hydraulic power tongs. Background In the well drilling process of oil and gas fields, casing running is an important well drilling operation process, and the casing plays a role in protecting and supporting a shaft in an open hole well and isolates oil, gas and water stratum. Typically, a single casing length is about ten meters, and the casing strings are interconnected to form a casing string for supporting the well arms prior to running into the wellbore. At present, a conventional hydraulic power tongs adopts metal clamp teeth, adopts the involute climbing principle to drive the clamp teeth to clamp a sleeve, completes the fastening and unfastening operation, and can form a certain degree of damage on the surface of the sleeve after the fastening and unfastening operation of the sleeve is completed, and the damage gradually expands under the corrosion of chemical substances after the damage goes into a well, so that the hidden quality trouble of a well completion pipe column is formed. Disclosure of Invention In order to overcome the defect that the surface of a sleeve can be damaged when the sleeve is screwed up by the existing sleeve clamp, the invention provides the friction belt type tooth trace-free hydraulic power clamp which can not damage the sleeve, so that the operation is labor-saving, and the operation efficiency of the sleeve clamp is improved. The friction belt type tooth trace-free hydraulic power tongs comprise a supporting seat and a motor, wherein the motor is fixed above the supporting seat, an output shaft of the motor is connected with a driving shaft, a chain wheel is connected to the driving shaft, a transmission chain is connected to the chain wheel, two clamping arms are connected to the supporting seat and driven by a hydraulic cylinder, the transmission chain bypasses the two clamping arms and then contacts with a sleeve, the supporting seat is connected with a hydraulic arm, and the end part of the hydraulic arm is supported on the transmission chain. Further, the transmission chain comprises a chain, and a belt is arranged on the outer side of the chain. Further, the end part of the clamping arm is connected with a circular clamping plate corresponding to the transmission chain, and when the clamping arm clamps the sleeve, the transmission chain bypasses the clamping plates at two sides and then the belt at the outer side of the transmission chain is contacted with the sleeve. Further, a torque monitor is fixed on the outer side of the supporting seat. Further, one end of the transmission shaft is connected to the motor output shaft, the other end of the transmission shaft is connected to the bearing seat through a bearing, and the bearing seat is fixed to the supporting seat. Further, the number of the transmission chains is 2, the transmission chains are arranged up and down along the driving shaft, the number of the hydraulic arms is 2, and each transmission chain corresponds to one hydraulic arm. Further, 2 chain wheels are arranged on the driving shaft, and each chain wheel is connected with a transmission chain. Further, the back-up tong is connected through fixed round pin axle to the supporting seat bottom, and back-up tong bottom is fixed on the back-up tong supporting seat, be equipped with two back-up tong clamping arms on the back-up tong, connect the back-up tong pneumatic cylinder between two back-up tong clamping arms. Further, when in use, the back-up wrench support seat is placed on the wellhead, so that the back-up wrench clamping arms clamp the casing collar; Connecting the sleeve to the sleeve coupling, starting a hydraulic cylinder of the clamping arm, and enabling the clamping arm to drive the transmission chain to clamp the sleeve; Starting a hydraulic cylinder of a hydraulic arm, wherein the hydraulic arm extends outwards to expand a transmission chain; And the motor is started, and drives the driving shaft to rotate, and the driving shaft drives the transmission chain to rotate through the chain wheel, so that the sleeve is driven to rotate. The hydraulic power tongs have the advantages that by adopting the scheme, the hydraulic power tongs realize the sleeve non-damage screwing and unscrewing through adopting the transmission chain with the belt, effectively protect the surfaces of the well-entering sleeve body and the coupling from damage, the transmission chain is clamped through the clamping arm, the motor drives the screwing and unscrewing, the performance is stable, the reliability is high, the labor is saved, the operation efficiency of the casing tongs is improved, and the well completion cost is reduced. Drawings FIG. 1 is a schematic diagram of the structure of the present invention; FIG. 2 is a schematic illustration of a drive shaft; FIG. 3 is a schematic