Bucket type automatic elevator for well repair

Abstract

The present invention provides a bucket-type automatic elevator for well repair, comprising an elevator portion and a drive portion. The elevator portion comprises a left tongue and a right tongue. The rear portion of the left tongue is connected to a left shaft sleeve, which is connected to a left sector gear. The rear portion of the right tongue is connected to a right shaft sleeve, which is connected to a right sector gear. The left and right sector gears mesh with each other. A spur gear is connected to either the left or right shaft sleeve. The drive portion comprises a pilot drive mechanism linked to the tongue and a reciprocating drive mechanism linked to the spur gear. During well repair operations, the automatic elevator for bucket-type well repair can open and close the elevator through the interaction of system mechanisms, eliminating the need for manual intervention, external power, or external hydraulic lines. This reduces the number of workers and prevents environmental pollution from leaked hydraulic oil.

Description

Technical Field

[0001] The invention relates to a barrel-type automatic elevator for well repair in the field of auxiliary tools for well repair operations. Background Art

[0002] Well workover is a crucial part of oilfield production. Tripping refers to the use of lifting equipment such as rigs and workover rigs to raise and lower tubing strings. This involves removing faulty or damaged downhole equipment and tools, including tubing, sucker rods, and pumps, and repairing and replacing them before lowering them back into the well. This also includes operations such as suctioning, sand bailing, and mechanical wax removal. Tripping is the most frequently performed part of a minor workover, typically accounting for over 70% of the total workover time.

[0003] As most of my country's oil fields have entered the middle and late stages of production, oil production equipment has aged, and workover tasks have become increasingly arduous. This has led to increased labor intensity for workers during workover operations. Therefore, it is necessary to improve workover efficiency, reduce the labor intensity of operators, keep workers away from harsh operating environments, improve operational safety, and reduce the occurrence of production accidents. It is also necessary to increase the degree of automation in workover operations.

[0004] During the well workover process, elevators are one of the most important tools. Currently, elevator operation is primarily manual, which is labor-intensive and can easily lead to serious engineering and personal accidents. Automated elevators are a key component of automated workover equipment. Therefore, increasing the degree of elevator automation is crucial for improving workover efficiency, reducing workover costs, and ultimately achieving automated workover. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and provide a barrel-type automatic elevator for well repair, which can realize automatic lifting and lowering of the pumping pipe string during the well repair process.

[0006] The technical solution of the present invention includes:

[0007] The first barrel-type automatic elevator for well repair includes an elevator part and a drive part. The elevator part is composed of a left tongue and a right tongue; wherein: the rear part of the left tongue is connected to the left shaft sleeve; the left shaft sleeve is connected to the left sector gear; the rear part of the right tongue is connected to the right shaft sleeve; the right shaft sleeve is connected to the right sector gear; the left sector gear and the right sector gear are meshed; and the drive part includes a pilot drive mechanism linked to the tongue.

[0008] The pilot drive mechanism includes a pilot hydraulic cylinder piston and a pilot hydraulic cylinder barrel that are linked with the left tongue and the right tongue, a single left tongue or a single right tongue.

[0009] The second type of barrel-type automatic elevator for well repair includes an elevator part and a drive part. The elevator part is composed of a left tongue and a right tongue. Among them, the rear part of the left tongue is connected to the left shaft sleeve; the left shaft sleeve is connected to the left sector gear; the rear part of the right tongue is connected to the right shaft sleeve; the right shaft sleeve is connected to the right sector gear; the left sector gear and the right sector gear are meshed; spur gears are connected to the left and right shaft sleeves or a single left shaft sleeve and a single right shaft sleeve; the drive part includes a reciprocating drive mechanism linked to the above-mentioned spur gears.

[0010] The reciprocating drive mechanism comprises a hydraulic plunger, a hydraulic cylinder and a rack connecting rod; the rack connecting rod and the spur gear form a gear-moving fit.

[0011] A hydraulic cylinder spring is arranged between the hydraulic plunger and the rack connecting rod.

[0012] The third type of barrel-type automatic elevator for well repair includes an elevator part and a drive part. The elevator part is composed of a left tongue and a right tongue; wherein: the rear part of the left tongue is connected to the left shaft sleeve; the left shaft sleeve is connected to the left sector gear; the rear part of the right tongue is connected to the right shaft sleeve; the right shaft sleeve is connected to the right sector gear; the left sector gear and the right sector gear are meshed; a spur gear is connected to the left or right shaft sleeve; the drive part includes a pilot drive mechanism linked to the tongue and a reciprocating drive mechanism linked to the above-mentioned spur gear.

[0013] The pilot drive mechanism includes a pilot hydraulic cylinder piston and a pilot hydraulic cylinder barrel linked to the left tongue or the right tongue; the reciprocating drive mechanism includes a hydraulic plunger, a hydraulic cylinder barrel and a rack connecting rod; the rack connecting rod and the spur gear form a geared fit.

[0014] The pilot hydraulic cylinder is connected to the hydraulic cylinder via a one-way throttle valve.

[0015] A hydraulic cylinder spring is arranged between the hydraulic plunger and the rack connecting rod.

[0016] The barrel-type automatic elevator for well repair includes an elevator part and a driving part. The elevator part is composed of a left tongue and a right tongue; the rear part of the left tongue is connected to the left shaft sleeve; the left shaft sleeve is connected to the left sector gear; the rear part of the right tongue is connected to the right shaft sleeve; and the right shaft sleeve is connected to the right sector gear.

[0017] This invention utilizes a bucket-type automatic elevator, eliminating the need for human intervention throughout the entire operation process. Opening and closing actions are accomplished through the interaction of system mechanisms, eliminating the need for external power to open and close the actuator. This reduces the number of workers and the likelihood of safety incidents. It also eliminates the need for external hydraulic piping, simplifies installation, and prevents environmental contamination from leaked hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of an elevator of the present invention.

[0019] In the figure: 1-left sector gear, 2-left tongue, 3-left sleeve, 4-pilot hydraulic cylinder piston, 5-pilot hydraulic cylinder barrel, 6-right sector gear, 7-right tongue, 8-right sleeve, 9-spur gear, 10-rack connecting rod, 11-hydraulic cylinder spring, 12-hydraulic plunger, 13-hydraulic cylinder barrel, 14-one-way throttle valve. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and examples.

[0021] Example 1:

[0022] like Figure 1 As shown, a barrel-type automatic elevator for well repair includes an elevator part and a drive part. The elevator part is composed of a left tongue 2 and a right tongue 7; the rear part of the left tongue 2 is connected to the left shaft sleeve 3; the left shaft sleeve 3 is connected to the left sector gear 1; the rear part of the right tongue 7 is connected to the right shaft sleeve 8; and the right shaft sleeve 8 is connected to the right sector gear 6.

[0023] The left sector gear 1 and the right sector gear 6 are meshed with each other.

[0024] The driving part includes a pilot hydraulic cylinder piston 4, a pilot hydraulic cylinder barrel 5, a spur gear 9, a rack connecting rod 10, a hydraulic cylinder spring 11, a plunger 12, a hydraulic cylinder barrel 13, and a one-way throttle valve 14.

[0025] The other end of the right shaft sleeve 8 is connected to the spur gear 9.

[0026] The right tongue 7 is connected to the pilot hydraulic cylinder piston 4 below.

[0027] The pilot hydraulic cylinder piston 4 is connected to the pilot hydraulic cylinder barrel 5 below.

[0028] The pilot hydraulic cylinder 5 is connected to the hydraulic cylinder 13 via a one-way throttle valve 14 .

[0029] The front of the hydraulic cylinder 13 is connected to the plunger 12 .

[0030] The front of the plunger 12 is connected to the hydraulic cylinder spring 11.

[0031] The front of the hydraulic cylinder spring 11 is connected to the rack connecting rod 10.

[0032] The rack connecting rod 10 is meshed with the spur gear 9 .

[0033] Example 2:

[0034] A barrel-type automatic elevator for well repair includes an elevator part and a drive part. The elevator part is composed of a left tongue 2 and a right tongue 7; the rear part of the left tongue 2 is connected to the left shaft sleeve 3; the left shaft sleeve 3 is connected to the left sector gear 1; the rear part of the right tongue 7 is connected to the right shaft sleeve 8; and the right shaft sleeve 8 is connected to the right sector gear 6.

[0035] The left sector gear 1 and the right sector gear 6 are meshed with each other.

[0036] The driving part includes a pilot hydraulic cylinder piston 4 and a pilot hydraulic cylinder barrel 5; the right tongue 7 is connected to the pilot hydraulic cylinder piston 4 below.

[0037] Example 3:

[0038] A barrel-type automatic elevator for well repair includes an elevator part and a drive part. The elevator part is composed of a left tongue 2 and a right tongue 7. The rear part of the left tongue 2 is connected to a left shaft sleeve 3; the left shaft sleeve 3 is connected to a left sector gear 1; the rear part of the right tongue 7 is connected to a right shaft sleeve 8; and the right shaft sleeve 8 is connected to a right sector gear 6.

[0039] The left sector gear 1 and the right sector gear 6 are meshed with each other; a spur gear 9 is connected to the right shaft sleeve 6; and the driving part includes a reciprocating driving mechanism linked to the spur gear 9.

[0040] The reciprocating drive mechanism includes a hydraulic plunger 12, a hydraulic cylinder 13 and a rack connecting rod 10; the rack connecting rod 10 and the spur gear 9 form a gear-moving fit.

[0041] A hydraulic cylinder spring 11 is provided between the hydraulic plunger 12 and the rack connecting rod 10 .

Claims

1. A bucket-type automatic elevator for well repair, comprising an elevator portion and a drive portion, wherein the elevator portion is composed of a left tongue and a right tongue; characterized in that: The rear part of the left tongue is connected to the left sleeve; the left sleeve is connected to the left sector gear; the rear part of the right tongue is connected to the right sleeve; the right sleeve is connected to the right sector gear; the left sector gear and the right sector gear are meshed with each other; a spur gear is connected to the left or right sleeve; the driving part includes a pilot drive mechanism linked to the tongue and a reciprocating drive mechanism linked to the above-mentioned spur gear; the pilot drive mechanism includes a pilot hydraulic cylinder piston and a pilot hydraulic cylinder barrel linked to the left tongue and the right tongue; the reciprocating drive mechanism includes a hydraulic plunger, a hydraulic cylinder barrel and a rack connecting rod; the rack connecting rod and the spur gear form a geared fit; the pilot hydraulic cylinder barrel is connected to the hydraulic cylinder barrel through a one-way throttle valve.

2. The barrel-type automatic elevator for well repair according to claim 1, characterized in that: A hydraulic cylinder spring is arranged between the hydraulic plunger and the rack connecting rod.

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