CN201794536U

CN201794536U - Wash pipe assembly of top drive drilling equipment

Info

Publication number: CN201794536U
Application number: CN2010202654924U
Authority: CN
Inventors: 李晓明
Original assignee: ShanDong Cruiser Top Drive Equipment Co Ltd
Current assignee: Tianjin Shengli Petroleum Equipment Co., Ltd.
Priority date: 2010-07-21
Filing date: 2010-07-21
Publication date: 2011-04-13
Anticipated expiration: 2020-07-21

Abstract

The utility model provides a wash pipe assembly of top drive drilling equipment. The wash pipe assembly consists of a lower packing box, spacer rings, an upper packing, a lower packing and an upper packing box, and is divided into an upper end and a lower end. The upper end and the lower end are connected via a wash pipe, the wash pipe rotates along with the center axis, the radial clearance among the wash pipe and the packing boxes ranges from 0.4mm to 0.6mm so that the wash pipe keeps static completely relative to the center axis, clearances among the upper packing box, the lower packing box and the spacer rings range from 0.2mm to 0.4mm, hardness of the outer surface of the wash pipe reaches HRC55-60, and the surface roughness reaches 0.4. Accordingly, additional vibration caused by rotation inertia and centrifugal force of the packings is reduced, abrasion loss of the packings and the wash pipe is reduced, abrasion of the wash pipe is uniform, and service lives of the wash pipe and the packings are prolonged on the premise of keeping the advantages of pressure resistance, corrosion resistance, high airtightness of the original wash pipe.

Description

The washing pipe assembly of top drive drilling equipment

Technical field

The utility model relates to mechanical device, especially a kind of washing pipe assembly apparatus that is used for the top drive drilling equipment.

Background technology

At present, washing pipe assembly in the domestic and international top drive drilling system, be mainly used in the drilling fluid sealing device of gooseneck part, it is the critical component of gooseneck part, because of equipment itself is used in the abominable area of natural conditions more, washing pipe assembly top is to be connected with hose, slush pump by gooseneck, and the bottom connects the main central axis of rotation, and imports high pressure drilling liquid in the drilling rod of rotation; Being connected between the washing pipe of washing pipe assembly and the packing_seal changeed and is connected with the movable sealing of not changeing, and sealing medium is the strong mud drilling liquid of high pressure, tempering property; Therefore, necessarily require that the washing pipe assembly is withstand voltage, anticorrosion, sealing is strong.Washing pipe assembly in the top drive drilling system all adopts floating punch tubular type packing unit at present, and the last packing box of washing pipe assembly links to each other with the gooseneck crossover sub, and washing pipe is fixed on the crossover sub lower end, does not rotate during washing pipe work; Packing box linked to each other with main central axis under the lower end of washing pipe assembly was passed through, and packing box, packing rotate with main central axis.According to on-the-spot mode of occupation, analyze its failure cause, on the one hand be the washing pipe that causes of the pressure of mud drilling liquid and the wearing and tearing between the packing, be the extraneous vibration that packing and washing pipe dynamic moment of inertia and centrifugal force cause has more greatly increased wearing and tearing between the two on the other hand.Abrasive wear is the main cause of washing pipe packing_seal wearing and tearing; According to the abrasive wear model that Rabin's Milunovich Rabinowicz proposes, wear extent and normal load and sliding distance are proportional basically.

The utility model content

The purpose of this utility model is to design washing pipe assembly in a kind of top drive drilling system for solving prior art problems.

The technical scheme that the utility model adopted is: the washing pipe assembly of top drive drilling equipment, by down packing box, O type circle, spacer ring, go up packing, down packing, snap ring, washing pipe, go up packing box, trip bolt is formed, described assembly is divided into two ends up and down, the upper end comprises packing box, spacer ring, goes up packing, trip bolt, spacer ring, O type circle, and the lower end comprises packing box, O type circle, snap ring, spacer ring, following packing down; Two ends connect by washing pipe up and down.Last packing is fixed in the spacer ring; Last packing box passes through spacer ring, upward packing, trip bolt are connected with washing pipe; To go up packing box by the trapezoidal thread of O type circle, spacer ring, last packing box fixedlys connected with the gooseneck crossover sub with washing pipe; Following packing is fixed in the spacer ring; Washing pipe connects as one by snap ring and spacer ring, will descend packing box and washing pipe and main central axis to be fixed as one by the trapezoidal thread that descends packing box; Rotate with main central axis.Washing pipe rotates with central tube, and the following packing box of movable sealing, O type circle, snap ring, spacer ring, following packing do not change.The radial clearance of washing pipe and packing box is between 0.4-0.6mm, the maintenance washing pipe is static fully with respect to main central axis, the gap of last packing box, following packing box and spacer ring is between 0.2-0.4mm, and the hardness of washing pipe external surface reaches HRC55-60, and surface roughness reaches 0.4.

The main central axis of washing pipe and rotation is rigidly connected, and last packing box and gooseneck are rigidly connected; Following packing box is a static seal, snap ring keeps a washing pipe and a relative radial position of adjusting ring, the radial clearance of washing pipe and following packing box is usually between 0.4-0.6mm, the maintenance washing pipe is static fully with respect to main central axis, the gap of last packing box and spacer ring is usually between 0.2-0.4mm, to allow certain radial missing.

Compared with prior art, the utility model has the advantages that: washing pipe rotates with main central axis, and the packing box of movable sealing does not change, and has alleviated the extraneous vibration that packing dynamic moment of inertia and centrifugal force cause more greatly; Thereby reduced the wear extent of packing and washing pipe, the wearing and tearing of washing pipe also relatively evenly; Do not changing under the advantage situation that original washing pipe assembly is withstand voltage, anticorrosion, sealing is strong the application life of more having improved washing pipe and packing.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Among the figure: 1 is following packing box, and 2 is O type circle, and 3 is snap ring, and 4 is spacer ring, and 5 is packing, and 6 is washing pipe, and 7 is last packing box, and 8 is spacer ring, and 9 is packing, and 10 is trip bolt, and 11 is spacer ring, and 12 is O type circle.

Below in conjunction with drawings and Examples the utility model is further specified.

The specific embodiment

Washing pipe assembly in a kind of top drive drilling system is by descending packing box 1,

O type circle

2,12,

spacer ring

4,8,11, packing 5,9, snap ring 3, washing pipe 6, last packing box 7, trip bolt 10 to form; The utility model is divided into two ends up and down, and two ends connect by washing pipe 6 up and down; The upper end: packing 9 is fixed in spacer ring 8 or the spacer ring 11; By

spacer ring

8,11, packing 9, trip bolt 10 last packing box 7 is linked together with washing pipe 6, by O type circle 12, spacer ring 11, the trapezoidal thread of going up packing box 7 they and gooseneck crossover sub are fixed together again, keep O type circle 12,

spacer ring

8,11, packing 9, last packing box 7, trip bolt 10 not rotate for one.

The lower end: packing 5 is fixed in the spacer ring 4; Washing pipe 6 connects as one by snap ring 3 and spacer ring 4, and the trapezoidal thread by following packing box 1 is fixed as one they and main central axis again; Rotate with main central axis.

Between 0.4-0.6mm, maintenance washing pipe 6 is static fully with respect to main central axis usually for the radial clearance of washing pipe 6 and packing box, and the gap of

packing box

1,7 and

spacer ring

4,8,11 is usually between 0.2-0.4mm; The hardness of washing pipe external surface reaches HRC55-60, and surface roughness reaches 0.4.

In the drawings, connect the gooseneck crossover sub on the last packing box 7, following packing box connects main central axis 1 time; Washing pipe 6 is rigidly connected with the main central axis of rotation, and last packing box 7 is rigidly connected with the gooseneck crossover sub; Following packing box partly is a static seal, snap ring 3 keeps washing pipe and spacer ring 11 relative radial positions, the radial clearance of washing pipe 6 and

packing box

1,7 is usually between 0.4-0.6mm, maintenance washing pipe 6 is static fully with respect to main central axis, the gap of

packing box

1,7 and spacer ring 11 is usually between 0.2-0.4mm, to allow certain radial missing.Washing pipe 6 is with the central tube rotation, and the packing box part of movable sealing is not changeed, and washing pipe 6 wearing and tearing are more even, the extraneous vibration of having avoided packing dynamic moment of inertia and centrifugal force to cause more greatly; Thereby reduced the wear extent of packing 5,9 and washing pipe 6; Do not changing under the advantage situation that original washing pipe assembly is withstand voltage, anticorrosion, sealing is strong, more improving the application life of washing pipe 6 and packing 5,9.

Claims

1. the washing pipe assembly of top drive drilling equipment, by down packing box, O type circle, spacer ring, go up packing, down packing, snap ring, washing pipe, go up packing box, trip bolt is formed, it is characterized in that being divided into two ends up and down, the upper end comprises packing box, spacer ring, goes up packing, trip bolt, spacer ring, O type circle, and the lower end comprises packing box, O type circle, snap ring, spacer ring, following packing down; Two ends connect by washing pipe up and down; Last packing is fixed in the spacer ring; Last packing box passes through spacer ring, upward packing, trip bolt are connected with washing pipe; To go up packing box by the trapezoidal thread of O type circle, spacer ring, last packing box fixedlys connected with the gooseneck crossover sub with washing pipe; Following packing is fixed in the spacer ring; Washing pipe connects as one by snap ring and spacer ring, will descend packing box and washing pipe and main central axis to be fixed as one by the trapezoidal thread that descends packing box; Rotate with main central axis.

2. the washing pipe assembly of top drive drilling equipment according to claim 1 is characterized in that washing pipe rotates with central tube, and the following packing box of movable sealing, O type circle, snap ring, spacer ring, following packing do not change.

3. the washing pipe assembly of top drive drilling equipment according to claim 1, the radial clearance that it is characterized in that washing pipe and packing box is between 0.4-0.6mm, the maintenance washing pipe is static fully with respect to main central axis, the gap of last packing box, following packing box and spacer ring is between 0.2-0.4mm, the hardness of washing pipe external surface reaches HRC55-60, and surface roughness reaches 0.4.