CN-121993106-A - Float type drill rod inner wall mud scraping device

CN121993106ACN 121993106 ACN121993106 ACN 121993106ACN-121993106-A

Abstract

The invention provides a mud scraping device for the inner wall of a floating type drill rod, which comprises a mud scraping mechanism, a floating drum mechanism and a centralizing mechanism which are sequentially arranged from top to bottom, wherein the mud scraping mechanism is connected with the floating drum mechanism through an upper joint and comprises a plurality of layers of mud scraping pieces for scraping mud on the inner wall of the drill rod, the floating drum mechanism comprises a floating drum, a communication assembly is arranged in the floating drum and used for determining the position of the device, and the centralizing mechanism is connected with the floating drum mechanism through a lower joint and used for preventing the device from inclining in the drill rod. The float-type mud scraping device for the inner wall of the float-type drill rod provided by the invention is designed in a float-type manner, so that the mud scraping device floats on mud, the mud is put into the drill rod when the drill rod is fished out, mud scraping treatment is carried out on the inner wall of the drill rod in the ascending process of the drill rod, the mud splashing on the surface of a drill floor on the inner wall of the drill rod is effectively reduced, the sliding risk of drilling workers is obviously reduced, the lifting operation efficiency is improved, and the labor intensity is reduced.

Inventors

LI ZHILIN
JIAN XU
XU JIANCHAO
PANG DONGXIAO
HE CHAO
WU YUNKAI
HAN XIONG
YAO JIANLIN
WANG ZHIMIN
FU QIANG

Assignees

中国石油天然气集团有限公司
中国石油集团川庆钻探工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (10)

1. A mud scraping device for the inner wall of a float type drill rod is characterized by comprising a mud scraping mechanism, a float mechanism and a righting mechanism which are sequentially arranged from top to bottom, The mud scraping mechanism is connected with the pontoon mechanism through an upper joint and comprises a plurality of layers of mud scraping pieces for scraping mud on the inner wall of the drill rod; The pontoon mechanism comprises a pontoon, and a communication assembly is arranged in the pontoon and used for determining the position of the device; the righting mechanism is connected with the pontoon mechanism through a lower joint and is used for preventing the device from tilting in the drill rod.
2. The floating type drill pipe inner wall mud scraping device as set forth in claim 1, wherein the mud scraping mechanism is provided with an armature at the top end for pulling the device out of the drill pipe.
3. The device for scraping mud on the inner wall of the floating type drill rod according to claim 1, wherein the mud scraping piece comprises mud scraping rubber, and an included angle of 30-60 degrees is formed between the mud scraping rubber and the axis direction of the floating type drill rod.
4. The device for scraping mud on the inner wall of the floating type drill rod according to claim 3, wherein a plurality of openings of 30-60 degrees are formed in the mud scraping rubber, and the openings in each layer of the mud scraping rubber are staggered.
5. The device for scraping mud on the inner wall of the floating type drill rod according to claim 1, wherein the communication assembly comprises a communication circuit board, a battery is connected to the lower end of the communication circuit board, and an antenna is connected to the upper end of the communication circuit board.
6. The device for scraping mud on the inner wall of the floating type drill rod according to claim 5, wherein the communication circuit board adopts a patch resistor and a capacitor, and is capable of resisting vibration and high temperature.
7. The device for scraping mud on the inner wall of the floating type drill rod according to claim 1, wherein the righting mechanism comprises righting rubber, an included angle of 30-60 degrees is formed between the righting rubber and the axis direction of the floating type drill rod, and a plurality of openings of 30-60 degrees are formed in the righting rubber.
8. The device for scraping mud on the inner wall of the floating type drill rod according to claim 1, wherein a balance pressure channel communicated with the floating type drill rod is arranged on the upper joint, and a constant pressure breakage film is arranged in the balance pressure channel.
9. The device for scraping mud on the inner wall of the floating type drill rod according to claim 8, wherein the breaking pressure of the constant-pressure broken film is more than 30MPa.
10. The device for scraping mud on the inner wall of the floating type drill rod according to claim 1, wherein a plurality of balancing weights are arranged between the lower joint and the floating type drill rod, and the number of the balancing weights is increased or decreased according to the density of mud.

Description

Float type drill rod inner wall mud scraping device Technical Field The invention relates to the technical field of petroleum and natural gas drilling engineering, in particular to a mud scraping device for the inner wall of a floating barrel type drill rod. Background In the drilling process of an oil-gas well, various working conditions such as drilling tool changing, short lifting, well dredging and the like relate to the lifting operation, in order to keep the safety of driller operation and the neatness of a drilling floor, the drilling rod is usually required to be scraped in the lifting operation, the mud scraping of the outer wall of the drilling rod is realized at present, however, due to the lack of the mud scraping technology of the inner wall of the drilling rod, the mud on the drilling floor is still spread in the lifting operation. The prior drill rod mud scraper mainly comprises two major types, namely a drill rod outer wall mud scraper and a drill rod inner wall mud scraper, wherein the drill rod inner wall mud scraper mainly comprises a passive mud scraper which is directly placed in a drill rod to scrape mud on the inner wall of the drill rod. For example, chinese patent application No. CN201610828211.3, entitled "a cleaning device for annular scraping blade on inner wall of drill rod" discloses a cleaning device for annular scraping blade on inner wall of drill rod, which moves relatively downwards under the action of its own weight, and keeps suspended on the liquid level of drilling fluid, and the drilling fluid scraped by scraping blade on inner wall of drill rod flows back downwards along the channels near the scraping blade and support arm, so that waste and pollution are reduced, cleaning cost is reduced, and congealing of water hole of drilling tool can be effectively prevented. However, the decontamination device on the inner wall of the drill rod has the risk of falling into the water hole of the drilling tool, and once the decontamination device falls into the water hole of the drilling tool, deformation such as a pontoon in the device can be caused under the high-pressure environment at the bottom of the well, so that the water hole is blocked, and the production is seriously influenced. Therefore, the float type drill rod inner wall mud scraping device has the advantages that the mud on the inner wall of the drill rod can be effectively cleaned, deformation cannot be caused even if the mud falls into the bottom of the water hole, and the phenomenon that the broken float blocks the water hole is avoided. Disclosure of Invention The present invention is directed to solving one or more of the problems of the prior art, including the shortcomings of the prior art. For example, one of the purposes of the present invention is to provide a pontoon type inner wall mud scraping device for drill pipe, which can effectively clean the mud on the inner wall of the drill pipe, and even if the mud falls into the bottom of the water hole, the mud does not deform, so that the broken pontoon is prevented from blocking the water hole. In order to achieve the aim, the invention provides a mud scraping device for the inner wall of a floating type drill rod, which comprises a mud scraping mechanism, a floating type mechanism and a centralizing mechanism which are sequentially arranged from top to bottom, wherein the mud scraping mechanism is connected with the floating type mechanism through an upper joint and comprises a plurality of layers of mud scraping pieces for scraping mud on the inner wall of the drill rod, the floating type mechanism comprises a floating type, a communication component is arranged in the floating type mechanism and used for determining the position of the device, and the centralizing mechanism is connected with the floating type mechanism through a lower joint and used for preventing the device from inclining in the drill rod. According to one or more exemplary embodiments of the invention, the mud scraping mechanism tip may be provided with an armature for pulling the device out of the drill rod. According to one or more exemplary embodiments of the present invention, the mud scraping member may include a mud scraping rubber, and the mud scraping rubber forms an angle of 30 ° to 60 ° with an axial direction of the pontoon. According to one or more exemplary embodiments of the present invention, the mud scraping rubber may be provided with a plurality of 30-60 ° openings, and the openings on each layer of the mud scraping rubber are staggered. According to one or more exemplary embodiments of the present invention, the communication assembly may include a communication circuit board having a battery connected to a lower end thereof and an antenna connected to an upper end thereof. According to one or more exemplary embodiments of the present invention, chip resistors and capacitors may be used on the communication circuit board, which is resistant to vibration and high te