CN205189775U

CN205189775U - Double -walled drilling rod that well drilling of accuse pressure was used

Info

Publication number: CN205189775U
Application number: CN201520987751.7U
Authority: CN
Inventors: 于永胜; 汤菲; 高瑞; 李宗刚; 杜宝地
Original assignee: CNPC Great Wall Drilling Co
Current assignee: CNPC Great Wall Drilling Co
Priority date: 2015-12-03
Filing date: 2015-12-03
Publication date: 2016-04-27
Anticipated expiration: 2025-12-03

Abstract

The utility model relates to a drilling tool, in particular to double -walled drilling rod that well drilling of accuse pressure was used are pressed in the oil accuse. The device's inner tube upper end is connected through the inner facial features of friction welding (FW) and female joint lower extreme, the inner tube lower extreme passes through the friction welding (FW) and is connected with the inner facial features in male joint upper end, outside of tubes side including the outer tube suit, the lower extreme is connected with female joint sleeve and male joint sleeve respectively through the welding on the outer tube, female joint sleeve upper end threaded connection is on female joint lower extreme outer wall and weld, male joint sleeve lower extreme threaded connection is on the outer wall of male joint upper end and weld, the processing of circumference isogonism degree has round axial pore I on the female joint lateral wall. The utility model discloses an it is sealed effectual, guarantee that the inner tube can make the annular space fluid pressure fully provided well drilling construction requirements between inner tube fluid pressure and the interior outer tube through the high pressure, produces relative displacement, extension drilling tool life between the outer tube in avoiding.

Description

A kind of double-wall drill pipe of controlled pressure drilling

Technical field:

The utility model relates to a kind of oil controlled pressure drilling instrument, particularly a kind of double-wall drill pipe of controlled pressure drilling.

Background technology:

In existing double-walled oil drill rocker, pipe connection all adopts interpolation type, and sealed by sealing ring between interior pipe, for high-pressure fluid provides closed path, existing double-wall drill pipe exists following shortcoming:

1. in, seal of tube circle very easily weares and teares, and application life is short, causes inside and outside interior pipe and gangs up, and namely, pipe highly pressurised liquid mixes with the gases at high pressure of annular space between inner and outer pipes, loses the effect using double-wall pipe.

2. interpolation type connected mode limits injection fluid pressure, is usually less than 10MP, is not suitable for direct circulation drilling well and uses.

3. in, pipe is fixed by alignment pin mode and outer tube, and drilling tool is managed when rotated and easily produced relative displacement with outer tube, tube lifetime in reducing.

Utility model content:

The technical problems to be solved in the utility model is to provide a kind of double-wall drill pipe of controlled pressure drilling, the arrangement achieves good sealing effect, in ensureing, pipe can pass through high pressure, the annular fluid pressure between interior pipe fluid pressure and inner and outer pipes is made fully to meet wellbore construction requirement, avoid producing relative displacement between inner and outer pipes, extend drilling tool application life.Overcome seal of tube weak effect in existing double-wall drill pipe, interior pipe fluid pressure is low, easily produces the deficiency of relative displacement between inner and outer pipes.

Technical solution adopted in the utility model is: a kind of double-wall drill pipe of controlled pressure drilling, comprises outer tube and interior pipe, interior pipe upper end is connected with female joint lower end inner face by friction welding, interior pipe lower end is connected with male joint upper end inner face by friction welding, outer tube sleeve is contained in outside interior pipe, outer tube upper and lower side is connected to female joint sleeve and male joint sleeve by welding, the upper end screwed connection of female joint sleeve is on female joint lower end outer wall and weld, the lower end screwed connection of male joint sleeve is on the outer wall of male joint upper end and weld, on female joint sidewall, circumference is angularly processed with a circle axial channel I, female joint upper surface has the annular groove I that can be communicated with all axial channel I, on male joint sidewall, circumference is angularly processed with a circle axial channel II, male joint lower surface has the annular groove II that can be communicated with all axial channel II, interior pipe and female joint sleeve, outer tube, circular passage is formed between male joint sleeve, upper end, circular passage is connected with axial channel I, lower end, circular passage is connected with axial channel II.

The beneficial effects of the utility model are: the utility model good sealing effect, in ensureing, pipe can pass through high pressure, make the annular fluid pressure between interior pipe fluid pressure and inner and outer pipes fully meet wellbore construction requirement, avoid producing relative displacement between inner and outer pipes, extend drilling tool application life.

Accompanying drawing illustrates:

Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.

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

Fig. 2 is the structural representation of outer tube.

Fig. 3 is the structural representation of interior pipe.

Fig. 4 is the structural representation of female joint.

Fig. 5 is the left view of Fig. 4.

Fig. 6 is the structural representation of female joint sleeve.

Fig. 7 is the structural representation of male joint.

Fig. 8 is the right view of Fig. 7.

Fig. 9 is the structural representation of male joint sleeve.

Detailed description of the invention:

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, a kind of double-wall drill pipe of controlled pressure drilling, comprises outer tube 1 and interior pipe 2, interior pipe 2 upper end is connected with female joint 3 lower end inner face by friction welding, interior pipe 2 lower end is connected with male joint 5 upper end inner face by friction welding, in ensureing, pipe 2 can pass through high-pressure fluid, outer tube 1 is sleeved on outside interior pipe 2, outer tube 1 upper and lower side is connected to female joint sleeve 4 and male joint sleeve 6 by welding, female joint sleeve 4 upper end screwed connection is on female joint 3 lower end outer wall and weld, male joint sleeve 6 lower end screwed connection is on the outer wall of male joint 5 upper end and weld, on female joint 3 sidewall, circumference is angularly processed with a circle axial channel I 7, female joint 3 upper surface has the annular groove I 10 that can be communicated with all axial channel I 7, on male joint 5 sidewall, circumference is angularly processed with a circle axial channel II 8, male joint 5 lower surface has the annular groove II 11 that can be communicated with all axial channel II 8, interior pipe 2 and female joint sleeve 4, outer tube 1, circular passage 9 is formed between male joint sleeve 6, upper end, circular passage 9 is connected with axial channel I 7, lower end, circular passage 9 is connected with axial channel II 8.

Be understandable that, above about specific descriptions of the present utility model, the technical scheme described by the utility model embodiment is only not limited to for illustration of the utility model, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within protection domain of the present utility model as long as meet.

Claims

1. a double-wall drill pipe for controlled pressure drilling, comprises outer tube (1) and interior pipe (2), it is characterized in that: interior pipe (2) upper end is connected with female joint (3) lower end inner face by friction welding, interior pipe (2) lower end is connected with male joint (5) upper end inner face by friction welding, outer tube (1) is sleeved on interior pipe (2) outside, outer tube (1) upper and lower side is connected to female joint sleeve (4) and male joint sleeve (6) by welding, female joint sleeve (4) upper end screwed connection is on female joint (3) lower end outer wall and weld, male joint sleeve (6) lower end screwed connection is on the outer wall of male joint (5) upper end and weld, on female joint (3) sidewall, circumference is angularly processed with a circle axial channel I (7), female joint (3) upper surface has the annular groove I (10) that can be communicated with all axial channel I (7), on male joint (5) sidewall, circumference is angularly processed with a circle axial channel II (8), male joint (5) lower surface has the annular groove II (11) that can be communicated with all axial channel II (8), interior pipe (2) and female joint sleeve (4), outer tube (1), circular passage (9) is formed between male joint sleeve (6), circular passage (9) upper end is connected with axial channel I (7), circular passage (9) lower end is connected with axial channel II (8).