CN2839551Y

CN2839551Y - Integrated whole-closed mud returning device

Info

Publication number: CN2839551Y
Application number: CN 200520097207
Authority: CN
Inventors: 刘斌; 王辉; 姚建华; 张振勇; 王振尧
Original assignee: SJ Petroleum Machinery Co
Current assignee: SJ Petroleum Machinery Co
Priority date: 2005-07-15
Filing date: 2005-07-15
Publication date: 2006-11-22
Anticipated expiration: 2015-07-15

Abstract

The utility model provides an integrated full-closed mud returning device which relates to a bottom hole mud returning delivery device in mud purifying systems in ocean platform workover rigs and drilling machines. The utility model is composed of a mud outlet device, a mud box, a mud slot and an output pipe of the mud slot, wherein the mud slot is welded on a suspension calabash beam of a lower moving base of the ocean workover rig along the moving direction when the workover rig works. The mud box is welded on a rotary table carrier frame on the moving base of the ocean workover rig, and an outlet of the mud box extends in the mud slot; one end of the mud outlet device is connected with the mud box, the other end is connected with a well head blowout preventer and an output pipe of the mud slot is connected with a vibration screen. The utility model solves the problems that the workers need continually change the mud returning pipes with different length in the operation processes of different well locations of the ocean workover rigs and the returning pipes are easy to leak.

Description

The totally-enclosed mud reflux of integral type

Affiliated technical field:

The utility model relates to that shaft bottom mud returns conveying device in the mud cleaning system of offshore oil drilling platform workover rig, trepan.

Background technology:

The mud reflux of at present domestic and international ocean workover rig, referring to Fig. 1, comprise wellhead blowout preventor 1, bell pipe nipple 2, mud return hose (or mud backflash) 3, vibrosieve 4, wherein, preventer 1 is relatively independent with vibrosieve 4, is connected by mud return hose 3 during operation.Shaft bottom mud flow to the slurry receiving box of vibrosieve 4 by bell pipe nipple 2 on the preventer 1 and the mud return hose 3 that is attached thereto.The ocean platform well location is more, and when operation, workover rig is by last mobile seat 5 and move seat 7 down and move on to another well location (position shown in fine line Fig. 1) along straight line from a well location, and the preventer of well head also will be done correspondingly to move thereupon simultaneously.Like this, variation has just taken place in the distance on the preventer between bell pipe nipple and the fixing vibrosieve, therefore, needs constantly to change mud hose or the mud ditch that connects the two.Task difficulty and the labour intensity of changing mud return duct or groove are bigger, and in addition, existing mud reflux is easy to take place mud and leaks at the return duct place, cause the pollution of ocean platform.

Summary of the invention:

The purpose of this utility model, be that the mud reflux that has ocean workover rig now is improved, make it to become totally-enclosed integrated mud reflux, realize that mud refluxes and need not manually assist in the different well location operation process of ocean workover rig, and guarantee no any leakage in the mud reflux course.

Above-mentioned purpose realizes by the following technical solutions:

The utility model is made up of mud means of egress, mud box, mud ditch and efferent duct thereof, the rotating disk carriage that utilizes going up of ocean workover rig to move on the seat hangs mud box fixing, the mud means of egress is connected between mud box and the wellhead blowout preventor, on the hoist beam on the following mobile seat of ocean workover rig, weld mud ditch, the outlet of mud box is extended in the mud ditch, and can in mud ditch, move by crossheading, between mud ditch and vibrosieve, be connected the mud efferent duct; On the mud means of egress, telescoping joint is set.

The utility model is compared with existing mud reflux has following beneficial effect:

1. monolithic: in case after this device installation, in operation process, need not carry out dismounting and maintenance again, reduced working strength of workers, saved a large amount of time, man power and material.

2. centralized: as the mud refluxing opening of preventer, liquid-gas separator, choke manifold and standpipe manifold all can be caused mud ditch, mud outlet integral body by mud ditch causes vibrosieve again, overcome the complex structure that original device adopts many pipelines to cause vibrosieve respectively to be caused and difficulty has been installed, realized that centralized whole mud refluxes.

3. pollution-free: because need not dismounting, pipeline structure is simple, and joint location is few, can adopt hard tube, and the mud of therefore having stopped basically to take place in operation process leaks.

4. expansion joint: by on the mud means of egress, expansion joint being installed, can realize the self-regulation of its height, avoid difficulty being installed because of well location height difference causes.

Description of drawings:

Fig. 1 is the structural representation of the mud reflux before improving;

Fig. 2 is a structural representation of the present utility model;

Fig. 3 is Fig. 2 A-A place sectional view;

Fig. 4 is the structural representation of the utility model mud means of egress;

Fig. 5 is the structural representation of the utility model mud box.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 2 and Fig. 3, the utility model is made up of mud means of egress 8, mud box 9 and mud ditch 10 and efferent duct thereof, the direction that mud ditch 10 moves when the workover rig operation is welded on the hoist beam 12 that moves seat 7 under the ocean workover rig, mud box 9 is welded on the rotating disk carriage 6 that moves on the seat 5, the outlet of mud box 9 extends in the mud ditch 10, mud means of egress 8 one ends link to each other with mud box 9, one end links to each other with preventer 1, the delivery outlet 11 of mud ditch links to each other with vibrosieve 4 by hard tube 21, and formation is 4 slurry channel from preventer 1 to vibrosieve.

Referring to Fig. 4, described mud means of egress, by the flange connection seat 13 that links to each other with preventer, telescoping joint 14, steel pipe 15, the reverse graft mouth 16 that links to each other with mud box is formed.Reverse graft mouth 16 have one circular dull and stereotyped with in one end and the circular dull and stereotyped cylinder that links to each other, circular dull and stereotyped center has the hole, one end of steel pipe 15 stretch in the cylinder of reverse graft mouth 16 with circular flat board in the edge in hole weld mutually, for the convenience of installing, welding hanger 17 on the circular flat board of reverse graft mouth 16.Telescoping joint 14 is made up of outer flange of the seal at one section sleeve pipe, sleeve pipe two ends, seal and the screw rod that connects the two ends flange, wherein the flange of an end is welded on the cylindrical of flange connection seat 13 upper ends, the other end of steel pipe 15 inserts in the sleeve pipe, be slidingly matched with it, seal compresses by screw rod.When the pithead position of ocean workover rig changed, this device can be regulated self length automatically, adapted to the contingent change in size of well head pressure rising pipe nipple.

Referring to Fig. 5, described mud box, has a rectangle tray 18, tray central authorities have a circular hole, welding exceeds tray on the edge in hole, in order to the cylinder 19 of the reverse graft mouth 16 that supports the mud means of egress, on the wall of rectangle tray one side, leave the rectangle outlet, weld a mud guiding gutter 20 that stretches into mud ditch 10 in the outlet.

The installation of this reflux is referring to Fig. 3, after being welded to mud box 9 and mud ditch 10 on rotating disk carriage 6 that moves seat and the hoist beam 12 that moves seat down respectively, the mud means of egress 8 of slinging is put into it downwards from rotating disk, utilize reverse graft mouth 16, tip upside down on the mud box 9.After the overall package adjustment is finished, can satisfy the job requirements of ocean workover rig at each well location.

Claims

1. the totally-enclosed mud reflux of integral type, it is characterized in that, form by mud means of egress, mud box and mud ditch and efferent duct thereof, the direction that mud ditch moves when the workover rig operation is welded on following mobile the hoist beam of ocean workover rig, mud box is welded on going up on the rotating disk carriage that moves on the seat of ocean workover rig, the outlet of mud box extends in the mud ditch, mud means of egress one end links to each other with mud box, one end links to each other with the preventer of well head, and the efferent duct of mud ditch links to each other with vibrosieve.

2. the totally-enclosed mud reflux of integral type according to claim 1, it is characterized in that, described mud means of egress, by the flange connection seat that links to each other with preventer, telescoping joint, steel pipe, the reverse graft mouth that links to each other with mud box is formed, the reverse graft mouth have one circular dull and stereotyped with in one end and the circular dull and stereotyped cylinder that links to each other, circular dull and stereotyped center has the hole, one end of steel pipe stretch in the cylinder of reverse graft mouth with circular flat board in the edge in hole weld mutually, telescoping joint is by one section sleeve pipe, the seal at sleeve pipe two ends, the screw rod of flange that seal is outer and connection two hold-carrying dishes is formed, wherein the flange of an end is welded on the cylindrical of flange connection seat upper end, the other end of steel pipe inserts in the sleeve pipe, be slidingly matched with it, seal compresses by screw rod.

3. the totally-enclosed mud reflux of integral type according to claim 1, it is characterized in that, described mud box, has a rectangle tray, tray central authorities have a circular hole, and welding exceeds and buys tray on the edge in hole, in order to the cylinder of the reverse graft mouth that supports the mud means of egress, on the wall of rectangle tray one side, leave the rectangle outlet, mud guiding gutter that stretches into mud ditch of welding in the outlet.

4. according to claim 2 or the totally-enclosed mud reflux of 3 described integral types, it is characterized in that the mud means of egress tips upside down on the mud box by the reverse graft mouth on it.

5. the totally-enclosed mud reflux of integral type according to claim 1 is characterized in that the efferent duct of mud ditch is a hard tube.