Drilling tube and rod screw thread greasing method and device and upward-buckling-type oil tube pressure testing machine

A technique of applying grease and pipe rods, which is applied to the device, coating, and testing the strength of materials by applying stable tension/pressure on the surface. The effect of buckle, saving work site and high degree of automation

Active Publication Date: 2017-08-25
QINGDAO ZHONGRUITAI MESNAC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 11th issue of China Equipment Engineering in 2004 "Full-automatic pull-up tubing water pressure test system" introduced the pull-up tubing water pressure test system used for pressure testing. Pressure test after tightening is used to check the quality of the oil pipe and threaded thread. The tool head is connected to the oil pipe through the threaded thread. During the make-up process, there is a hidden danger of damage to the threaded thread due to the middle problem. The authorized announcement number is CN 2660508Y utility model One of the reasons is the voltage fluctuation and alignment problems mentioned in the patented full-automatic tubing pressure test machine

Method used

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  • Drilling tube and rod screw thread greasing method and device and upward-buckling-type oil tube pressure testing machine
  • Drilling tube and rod screw thread greasing method and device and upward-buckling-type oil tube pressure testing machine
  • Drilling tube and rod screw thread greasing method and device and upward-buckling-type oil tube pressure testing machine

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Experimental program
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Effect test

Embodiment approach 1

[0029] combined with figure 1 , 2 , 3, 4 illustrate a kind of implementation mode of the oiling device for the threaded button of the drilling and production pipe rod of the present invention, for the convenience of effect comparison, figure 1 The middle cylinder is in the extended state, the coating head is close to the mould, Figure 4 The middle cylinder is in the retracted state, the coating head is away from the mould, and the threaded thread of the pipe rod is screwed into the mould.

[0030] Such as figure 1 As shown, the oiling device for drilling and producing pipe rod threads includes a mold 1, a coating head 21, a sliding rod 22, and a sliding support 23. The mold 1 is provided with a mold thread matched with a screw at the end of the drilling and production pipe rod. In this embodiment, the mold thread is an external thread, and the thread at the end of the matching drilling and production pipe rod is an internal thread.

[0031] The end of the sliding rod 22 i...

Embodiment approach 2

[0044] combined with Figure 5 , 6 , 7 illustrates another embodiment of the device for applying grease to the screw thread of the drilling and production pipe rod of the present invention.

[0045] Such as Figure 5 As shown, in this embodiment, a swing cylinder 62 and a swing arm 61 are installed on the swing support 63, the swing arm 61 and the swing support 63 are hinged, the swing cylinder 62 drives the swing arm 61 to swing, and the end of the swing arm 61 is connected to the coating head 64. The rotation axis of the swing arm 61 is perpendicular to the thread axis of the mold, and the swing arm 61 drives the coating head to insert and leave the mold.

[0046] Such as Figure 5 , 6 As shown, in this embodiment, the mold thread provided on the surface of the mold 7 is an internal thread, the coating head 64 is provided with an outer arc 642 matching with the mold thread, and the oil outlet 641 is arranged on the outer arc 642 The outer surface. The outer arc 642 coo...

Embodiment approach 3

[0051] This embodiment is an implementation of the screw-up type tubing pressure testing machine equipped with the drilling and production pipe threaded thread grease applying device of the present invention.

[0052] Figure 8 It is a front view of an embodiment of a buckle-up tubing pressure test machine equipped with a drilling and production pipe thread thread grease application device of the present invention. In the figure, the drilling production pipe thread thread thread grease application device 2 in Embodiment 1 It is installed on the side where the tool head is an external thread, and in embodiment 2, the drilling and production pipe rod screw thread grease application device 3 is installed on the side where the tool head is an internal thread.

[0053] Figure 9 yes Figure 8 Embodiment top view.

[0054] Figure 10 yes Figure 9 A partial enlargement of the .

[0055] The process of using the buckle-up oil pipe pressure test machine of this embodiment to car...

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Abstract

Grease is coated onto a mold thread, and a screw thread at the tail end of a drilling tube and rod and the mold thread are in screw joint. The grease coated onto the mold thread adheres to the surface of the screw thread of the drilling tube and rod. In the screw joint process, the grease is carried into the surfaces of other screw threads. The surface of the screw thread at the tail end of the drilling tube and rod is coated with the grease in the mode, the structure is simple, and implementation is convenient. The surface of the screw thread of an oil tube is coated with grease before pressure testing, greasing and pressure testing can be combined together, no special screw thread greasing operations are required, and operation fields are saved. An upward-buckling-type oil tube pressure testing machine is high in control automation degree, screw thread greasing operations and the upward-buckling-type oil tube pressure testing machine are combined together, and thus automated operations can be better implemented. In addition, in the upward buckling process, the grease can play the effect of lubricating, the screw thread can be better protected and the pressure testing success rate is increased.

Description

technical field [0001] The invention relates to the technical field of protection, maintenance and inspection of oil and gas operation parts, in particular to a method and device for applying grease to threads of drilling and production pipe rods, and a buckle-up type oil pipe test press. Background technique [0002] Tubing, casing, drill pipe and other pipe and rod components used in oil and gas drilling and production operations are provided with threads (threads) at the ends. For corrosion prevention, rust prevention, lubrication during connection and auxiliary sealing, it is necessary to coat these threads. Applying grease, the traditional coating method is manual coating, which has low efficiency, difficult control of coating quality and coating volume, high labor costs and harsh working environment, and it is difficult to guarantee both quality and safety; in order to solve this problem, the industry Many solutions have been proposed. The utility model patent with the...

Claims

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Application Information

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IPC IPC(8): B05C5/00B05C11/10G01N3/12
CPCG01N3/12B05C5/002B05C11/1002
Inventor刘一凡段英良王相荣李振礼
OwnerQINGDAO ZHONGRUITAI MESNAC TECH CO LTD