Double-pneumatic-tire sealing telescopic pipe with guide limiting pull rod

Abstract

The utility model discloses a double-pneumatic-tire sealing telescopic pipe with a guide limiting pull rod, which comprises an outer pipe and an inner pipe inserted in the outer pipe in a sliding manner, a sealing short section is arranged at one end, close to the inner pipe, of the outer pipe, and the sealing short section is a double-pneumatic-tire union; an inner pipe end plate is arranged on the inner pipe, a guide plate and an outer pipe end plate are arranged on the outer pipe, and a limiting pull rod is arranged on the inner pipe end plate, the guide plate and the outer pipe end plate in a penetrating mode. The device is used between a movable well drilling and workover module and a fixed mud tank, the requirement for backflow of well drilling and workover fluid is met, under the condition that a backflow pipeline is not detached, expansion and sealing of a pipe section along with a well position can be achieved by controlling inflation and deflation of the pneumatic tire, and under the guiding and limiting effects of the pull rod, the pipe section can be sealed in the well position. And concentricity and reliability of slippage of the inner and outer pipes are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ocean engineering, especially to a double air tire sealed telescopic pipe with a guide limiting pull rod between a drilling equipment module and a mud pool. BACKGROUND

[0002] The drilling equipment module is a core component of the marine drilling and workover rig, and the mud return pipe is a key channel for the mud to return from the drilling equipment module to the mud tank. The conventional return pipe method is to use flange spools of different lengths when the well site is different, and to disassemble and replace them on site. This method increases the workload on site to some extent and reduces the efficiency of drilling and workover. Therefore, there is an urgent need to develop a mud return pipe that is simple in structure, easy to operate, reliable in performance and suitable for different well sites. SUMMARY

[0003] The utility model discloses a double air tire sealed telescopic pipe with a guide limiting pull rod between a drilling equipment module and a mud pool, which is suitable for connecting a movable wellhead and a fixed mud tank and meets the requirements of drilling and workover fluid return.

[0004] The utility model discloses the following technical scheme is adopted to be realized.

[0005] A double air tire sealed telescopic pipe with a guide limiting pull rod, comprising an outer pipe and an inner pipe slidingly inserted into the outer pipe, a sealing spool is provided at one end of the outer pipe close to the inner pipe, the sealing spool is a double air tire, an inner pipe end plate is provided on the inner pipe, a guide plate and an outer pipe end plate are provided on the outer pipe, and a limiting pull rod is provided on the inner pipe end plate, the guide plate and the outer pipe end plate.

[0006] Further, the outer pipe comprises an outer pipe spool, and an outer pipe flange is welded at one end of the outer pipe spool.

[0007] Further, the inner pipe comprises an inner pipe spool, and an inner pipe flange is welded at one end of the inner pipe spool.

[0008] Further, the double air tire comprises two groups of bynum rings, the bynum rings are connected with the outer pipe, and a sealing air tire with an inflation port is arranged on the inner side of each group of bynum rings.

[0009] Further, the limiting pull rod comprises a screw rod, and the screw rod is fastened with the inner pipe end plate and the outer pipe end plate through a nut.

[0010] The present application has the following advantages.

[0011] The utility model is used between movable drilling and repairing well module and fixed mud tank, satisfies the requirement of drilling and repairing well fluid reflux, can realize the telescopic and sealing of pipe section along well position through the control of gas tire inflation and deflation under the condition of not carrying out the disassembly of reflux pipeline, and under the guidance and spacing effect of pull rod, the concentricity and reliability of inner and outer pipe sliding are ensured. The utility model has the characteristics of simple structure, convenient to use, safe and reliable, effectively solves the problems of manual disassembly, low operation efficiency of mud reflux pipeline (hard pipe) during the sliding process of drilling equipment module. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the structural schematic diagram of the utility model;

[0013] Fig. 2 It is the installation schematic diagram of the utility model.

[0014] Among them, 1. inner tube, 1-1. inner tube flange;1-2. inner tube nipple;1-3. inner tube end plate;

[0015] 2. outer tube;2-1. outer tube flange;2-2. outer tube nipple;2-3. guide plate;2-4. outer tube end plate;

[0016] 3. sealing nipple;3-1. by n circle;3-2. sealing gas tire;3-3. inflation port;

[0017] 4. spacing pull rod;4-1. screw;4-2. spherical washer;4-3. nut. DETAILED DESCRIPTION

[0018] The utility model will be further explained in connection with the drawings and examples.

[0019] As Figs. 1-2 Indicated, a kind of double gas tire sealing telescopic pipe with guiding spacing pull rod, including inner tube 1, outer tube 2, sealing nipple 3 and spacing pull rod 4.

[0020] The inner tube flange 1-1 on the inner tube 1 is connected with inner tube nipple 1-2 using butt welding, and inner tube nipple 1-2 is fixed with a circle of inner tube end plate 1-3.

[0021] The outer tube flange 2-1 on the outer tube 2 is connected with outer tube nipple 2-2 using butt welding, and outer tube nipple 2-2 is fixed with guide plate 2-3 and outer tube end plate 2-4.

[0022] The inner tube 1 and outer tube 2 of the application are both processed from 20# carbon steel material.The inner tube end plate 1-3, guide plate 2-3 and outer tube end plate 2-4 are mutually parallel steel plates with guide holes.

[0023] The sealing nipple 3 is composed of two groups of ring 3-1, sealing air tire 3-2 and inflation port 3-3, each group can place corresponding specification inflatable sealing air tire 3-2 in the ring 3-1, and inflate the sealing air tire 3-2 through the inflation port 3-3.

[0024] The outer diameter of the inner pipe nipple 1-2 in the application is slightly smaller than the inner diameter of the outer pipe nipple 2-2, so it can extend for a distance, and the sealing and telescopic sliding between the inner pipe 1 and the outer pipe 2 are realized by inflating and deflating the sealing air tire 3-2, so that the length of the inner and outer pipes can be adjusted according to the sliding distance of the well site. The inner pipe 1, the outer pipe 2 and the double air tire are combined in the application, so that the well drilling equipment module can be moved to another well without manual disassembly and replacement. In addition, the double air tire made of rubber is used for sealing to ensure that the mud medium does not leak out through the gap between the inner and outer pipes.

[0025] The limiting pull rod 4 is composed of a screw rod 4-1, a spherical washer 4-2 and a nut 4-3. The screw rod 4-1 passes through the holes in the inner pipe end plate 1-3, the outer pipe end plate 2-4 and the guide plate 2-3, and is limited and fixed by the spherical washer 4-2 and the nut 4-3. The inner pipe end plate 1-3, the outer pipe end plate 2-4 and the guide plate 2-3 are arranged on the inner pipe 1 and the outer pipe 2, and cooperate with the limiting pull rod 4 to ensure that the inner and outer pipes always have good concentricity during telescoping, and the limiting nut is arranged to ensure that telescoping failure does not occur.

[0026] The telescopic pipe can be flexibly elongated or shortened during the sliding process of the well drilling equipment module, which meets the drilling and workover operation of the well drilling equipment module under different well site conditions, avoids the on-site workload of disassembling and replacing the return pipeline in advance when moving the well, saves on-site manpower, and improves the efficiency of drilling and workover.

[0027] The telescopic pipe can be flexibly elongated or shortened during the sliding process of the well drilling equipment module, which meets the drilling and workover operation of the well drilling equipment module under different well site conditions, avoids the on-site workload of disassembling and replacing the return pipeline in advance when moving the well, saves on-site manpower, and improves the efficiency of drilling and workover.

[0028] The embodiments of the specific embodiment are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims

1. A dual air tube seal telescoping tube with a guided and limited pull rod, characterized by: The utility model provides a double -tire sealing nipple, which comprises an outer tube (2) and an inner tube (1) slidingly inserted into the outer tube (2), a sealing nipple is arranged at one end of the outer tube (2) close to the inner tube (1), the sealing nipple is a double-tire sealing nipple, an inner tube end plate (1-3) is arranged on the inner tube (1), a guide plate (2-3) and an outer tube end plate (2-4) are arranged on the outer tube (2), and a limiting pull rod (4) is arranged on the inner tube end plate (1-3), the guide plate (2-3) and the outer tube end plate (2-4).

2. A dual air tube seal telescoping tube with a guided and limited travel pull rod as in claim 1, wherein: The outer tube (2) comprises an outer tube nipple (2-2), and an outer tube flange (2-1) is welded at one end of the outer tube nipple (2-2).

3. A dual air tube seal telescoping tube with a guided and limited travel pull rod as in claim 1, wherein: The inner tube (1) comprises an inner tube nipple (1-2), and an inner tube flange (1-1) is welded at one end of the inner tube nipple (1-2).

4. The dual air tube sealed telescopic tube with a guiding and limiting pull rod according to claim 1, characterized in that: The double-tire sealing nipple comprises two groups of sealing rings (3-1), the sealing rings (3-1) are connected with the outer tube (2), and a sealed tire (3-2) with an inflation port (3-3) is arranged on the inner side of each group of sealing rings (3-1).

5. The dual air tube sealed telescopic tube with a guiding and limiting pull rod according to claim 1, characterized in that: The limiting pull rod (4) comprises a screw rod (4-1), and the screw rod (4-1) is fastened with the inner tube end plate (1-3) and the outer tube end plate (2-4) through a nut (4-3).

Images