CN-121993173-A - Positioning system and finding method for mud scraper on inner wall of drill rod

CN121993173ACN 121993173 ACN121993173 ACN 121993173ACN-121993173-A

Abstract

The invention provides a positioning system and a positioning finding method of a drill rod inner wall mud scraper, wherein the positioning finding method adopts a drill rod inner wall mud scraper locking system to lock and position the drill rod inner wall mud scraper; when the connection of the mud scraper is lost, the control communication loss signal is cut off, the electromagnet is powered off, the magnetic slip ejects, the mud scraper on the inner wall of the drill rod is locked and positioned on the inner wall of the drill rod, the standby signal source is started, the electromagnet is controlled to be powered on, the mud scraper on the inner wall of the drill rod is unlocked, the drill rod is lifted, and the mud scraper is lifted up to the ground. The positioning system comprises magnetic slips, elastic pieces and electromagnets, wherein the magnetic slips are arranged on two opposite side walls of the mud scraper on the inner wall of the drill rod, and the elastic pieces and the electromagnets are arranged between the magnetic slips. The positioning system provided by the invention can be used for rapidly locking and retrieving the mud scraper, so that the mud scraper is prevented from falling to the bottom of a well.

Inventors

XU JIANCHAO
CHEN TAO
DENG HU
PANG DONGXIAO
ZHOU CHANGHONG
WANG LI
LI LEI
SUN LI
HUANG CHONGJUN
WANG ZHIMIN

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 positioning finding method of a drilling rod inner wall mud scraper is characterized in that a drilling rod inner wall mud scraper locking system is adopted to lock and position the drilling rod inner wall mud scraper, the drilling rod inner wall mud scraper locking system comprises magnetic slips, elastic pieces, electromagnets, a control communication module and a standby signal source, wherein the magnetic slips are arranged on two opposite side walls of the drilling rod inner wall mud scraper, the elastic pieces and the electromagnets are arranged between the magnetic slips, when the electromagnets are electrified, the magnetic slips are mutually close to be in a compressed state, the drilling rod inner wall mud scraper is unlocked and positioned, when the electromagnets are powered off, the magnetic slips are mutually far away from to be in an ejected state under the pushing of the elastic pieces, the drilling rod inner wall mud scraper is locked and positioned on the drilling rod inner wall, the control communication module is connected with the electromagnets, when the control communication module works normally/sleeps, the control electromagnet is electrified/powered off, the standby signal source is started after the model is lost, and the standby signal source is connected with the electromagnets, and the positioning finding method comprises the following steps: The mud scraper on the inner wall of the drill rod normally works in the drill rod, the communication module is controlled to normally work, and the electromagnet is electrified; when the mud scraper loses contact, the communication is controlled to lose signal, the electromagnet is powered off, the magnetic slip pops up, and the mud scraper on the inner wall of the drill rod is locked and positioned on the inner wall of the drill rod; and starting a standby signal source, controlling the electromagnet to be electrified, unlocking the mud scraper on the inner wall of the drill rod, lifting the drill rod, and lifting the mud scraper to the ground.
2. The method for locating a mud scraper on an inner wall of a drill pipe according to claim 1, wherein the locking system of the mud scraper on the inner wall of the drill pipe further comprises a ground control center, the ground control center is connected with the control communication module for communication, and when the ground control center is out of contact with the control communication system, the control communication module is dormant, and the electromagnet is powered off.
3. The method of locating a mud scraper on an inner wall of a drill pipe according to claim 1 wherein the resilient member comprises a compression spring.
4. The method of locating a mud scraper on an inner wall of a drill pipe according to claim 1 wherein the backup signal source comprises an RFID.
5. A positioning system of a mud scraper on the inner wall of a drill rod is characterized by comprising a magnetic slip, an elastic piece and an electromagnet, wherein, The magnetic slips are arranged on two opposite side walls of the mud scraper on the inner wall of the drill rod; an elastic piece and an electromagnet are arranged between the magnetic slips; When the electromagnet is electrified, the magnetic slips are close to each other and are in a compressed state, the mud scraper on the inner wall of the drill rod is unlocked and positioned; when the electromagnet is powered off, the magnetic slips are mutually far away from each other under the pushing of the elastic piece and are in an ejecting state, locking of mud scraper on inner wall of drill rod is positioned on the inner wall of the drill rod.
6. The positioning system of the inner wall mud scraper of the drill rod according to claim 5, further comprising a control communication module, wherein the control communication module is connected with the electromagnet, and the electromagnet is controlled to be electrified when the control communication module works normally, and is powered off when the control communication module sleeps.
7. The positioning system of a drill pipe inner wall mud scraper according to claim 6, further comprising a backup signal source connected to the electromagnet, wherein the backup signal source controls the electromagnet to energize when the control communication module has completely lost the signal.
8. The drill pipe inner wall mud scraper positioning system of claim 7, wherein the backup signal source comprises an RFID.
9. The positioning system of the inner wall mud scraper of the drill rod of claim 5, further comprising a ground control center, wherein the ground control center is in communication with the control communication module, and when the control communication module loses the signal, the ground control center loses contact with the control communication module, the control communication module sleeps, and the electromagnet is powered off.
10. The drill pipe inner wall mud scraper positioning system of claim 5, wherein the resilient member comprises a compression spring.

Description

Positioning system and finding method for mud scraper on inner wall of drill rod Technical Field The invention relates to the technical field of petroleum and natural gas drilling engineering, in particular to a positioning system and a finding method of a mud scraper on the inner wall of a drill rod. Background In the process of drilling oil and gas wells, various working conditions such as drilling tool changing, short lifting, well dredging and the like relate to the lifting operation, and in order to keep the safety of driller operation and the neatness of a drilling floor surface, the drilling rod is usually required to be subjected to mud scraping operation in the lifting process. At present, mud scraping on the outer wall of a drill rod is realized, however, due to the lack of mud scraping technology on the inner wall of the drill rod, mud on the drill floor is still spread in the process of lifting the drill, and the construction is influenced. Various drill rod mud scrapers are invented at home and abroad, and in the drill rod inner wall mud scrapers, part of the mud scrapers fall down in the drill rod under the action of self gravity so as to achieve the purpose of mud scraping. However, the falling speed of the mud scraper is uncontrollable, so that the mud scraper is easy to directly fall into the underground to become a fish, or the mud scraper falls to a certain position of the drill rod and loses contact with the control console, and at the moment, the mud scraping device loses control, so that potential safety hazards are easily caused, and the drilling efficiency is influenced. Therefore, it is necessary to design a method for locating and locking the mud scraping device in a falling mode. Through the locking module, when the mud scraping device loses contact no signal or fails, the mud scraping device is automatically locked on the inner wall of the drill rod, then the drill rod is lifted, the mud scraping device is quickly retrieved, the mud scraping device is prevented from falling to the bottom of the well, and the retrieving efficiency is also improved. Chinese patent publication No. CN214007105U, entitled "a fish anti-wear overshot" discloses an overshot capable of locking and fishing a down-hole fish. Two sets of locking elements are radially symmetrically arranged at the same axial position of the lining overshot in the overshot. When the fishing is successful, the underground fish is guided to the lining fishing barrel, and then the underground fish is axially locked through the locking piece, so that the underground fish is entrained by the lifting-up anti-abrasion fishing barrel, and the fishing of the underground fish is completed. Different from the patent of the utility model, the utility model can realize emergency reaction after the fish loses contact, automatically lock the fish in the drill rod and prevent the fish from falling to the bottom of the well. The emergency can be better dealt with, and more losses are avoided. Disclosure of Invention The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, it is an object of the present invention to provide a positioning system for a drill pipe inner wall scraper that is capable of quick response. For another example, another object of the present invention is to provide a positioning and finding method for a mud scraper on the inner wall of a drill pipe with high finding efficiency. In order to achieve the above purpose, according to one aspect of the present invention, a positioning and finding method for a drill pipe inner wall scraper is provided, wherein the positioning and finding method can be used for locking and locating the drill pipe inner wall scraper by adopting a drill pipe inner wall scraper locking system, the drill pipe inner wall scraper locking system can comprise magnetic slips, an elastic piece, an electromagnet, a control communication module and a standby signal source, wherein the magnetic slips are arranged on two opposite side walls of the drill pipe inner wall scraper, the elastic piece and the electromagnet are arranged between the magnetic slips, the magnetic slips are mutually close to each other in a compressed state when the electromagnet is electrified, the drill pipe inner wall scraper is not locked and located, the magnetic slips are mutually far away from each other in an ejected state when the electromagnet is in an outage state, the drill pipe inner wall scraper is locked and located on the drill pipe inner wall, the control communication module is connected with the electromagnet, the control communication module is in normal operation/dormancy, the control electromagnet is controlled to be electrified/powered off, the standby signal source is started after the control communication module is lost, the standby signal source is connected with the electromagnet, the inner wall scraper is normally operated in the drill pipe inner wa