CN203129975U - Hydraulic torque safety joint - Google Patents
Hydraulic torque safety joint Download PDFInfo
- Publication number
- CN203129975U CN203129975U CN 201320069268 CN201320069268U CN203129975U CN 203129975 U CN203129975 U CN 203129975U CN 201320069268 CN201320069268 CN 201320069268 CN 201320069268 U CN201320069268 U CN 201320069268U CN 203129975 U CN203129975 U CN 203129975U
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- lower contact
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Abstract
The utility model relates to a hydraulic torque safety joint which is one of oil and gas exploitation down-hole operation tools and is used in a continuous oil pipe well repairing construction pipe column. The hydraulic torque safety joint comprises an upper joint. A piston is sleeved inside the upper joint. A lower joint is sleeved at the lower end of the upper joint. A sleeved connection section of the upper joint inner wall and the piston outer wall is sequentially provided with a sealing section, a pressure balancing section and a guiding section from top to bottom. The upper joint and the piston are axially fixed through a shearing pin arranged on the sealing section in the radial direction. The upper joint and the lower joint are axially fixed through a locking block. The inner end of the locking block abuts against the periphery of the guiding section of the piston, and the outer end of the locking block protrudes out of the outer wall of the upper joint and leans against the upper end of a ring-shaped groove of the lower joint in a clamping mode. A downward guiding inclined face is arranged on the matching and clamping portion of the ring-shaped groove and the locking block. The connection section of the upper joint on the lower side of the ring-shaped groove and the lower joint is provided with axial keys used for transmitting torque. When the safety joint is stuck during continuous pipe column well repairing construction operation, the pipe column does not need to be rotated and can come away from the lower joint conveniently.
Description
Technical field
The utility model relates to oil and gas development underground work instrument, particularly a kind of hydraulic torque formula safety joint.
Background technology
At present, when workover treatment, for strengthening the operating tool string safety, general installation safety joint on operating tool string, this safety joint can transmit moment of torsion together and bear various combined stresseses with tubing string, its effect is when down-hole string has an accident, and can throw off from safety joint meeting the card tubing string, thereby be the good condition of further processing creation of accident.
Safety joint commonly used at present mainly contains two kinds of left-hand thread formula and pull-types.The top connection of left-hand thread formula safety joint directly is connected by left hand thread with lower contact, meets card or operate miss in tubing string is being gone into the well process, easily causes safety joint back-off phenomenon midway, and security reliability is relatively poor; And the pull-type safety joint only depends on shear pin connect to go up lower contact, is subjected to the influence of operation and hole condition easily in the operation and causes breaking taking off midway, causes work accident.And conventional safety joint can't be applied on the coiled tubing workover operation construction tubing string, because coiled tubing workover operation construction tubing string can't rotate, and up and down load is limited, and therefore, existing safety joint incompatibility is used at coiled tubing workover treatment tubing string.
The utility model content
The utility model has problems at prior art, and the safety joint of a kind of hydraulic torque formula is provided, with solve coiled tubing workover treatment tubing string in construction by the problem of blocking and can't withdraw from.
The purpose of this utility model is to realize like this, the safety joint of a kind of hydraulic torque formula, comprise top connection, be set with piston in the described top connection, the socket section of top connection inwall and piston outer wall comprises seal section, pressure balance section and guide section from the top down successively, and described top connection and piston are by radially being arranged on the shear pin axial restraint of seal section; Be provided with annular balance oil groove between the fitting face of described pressure balance section, the piston wall of described balance oil groove is provided with the balance oil hole that is communicated with piston inner hole, described balance oil groove outer wall and inwall interlock respectively downwards and are provided with interior step and the outer step that radially diminishes, step and outer step overlap mutually and stop the whereabouts in when described piston drops downwards, the top connection lower end is set with lower contact, described top connection and lower contact are by the lock dog axial restraint, the lower contact inwall that is connected with top connection is provided with annular groove, described lock dog the inner leans the periphery of piston guide section and the top connection outer wall is protruded in the outer end and card leans against on the annular groove of lower contact, and annular groove is provided with downward guiding surface with the card that cooperates of lock dog by the place, and the top connection of described annular groove downside and lower contact linkage section are provided with the axial bond for driving torque.
Safety joint of the present utility model, when being installed on the operating tool string operate as normal, piston connects fixing by shear pin and the higher authorities, top connection and lower contact are fixed by lock dog, the balance oil groove is used for dummy piston up and down because of the different pressure differentials that produce of sectional area, prevent that the shear pin accident from cutting off, when coiled tubing workover treatment tubing string when work progress is blocked, from the pitching of well head tubing string, suppress piston from the top down, building the pressure from the piston upper port cuts off shear pin, and piston makes the support of pin, moves downward along guide section, the inwall of balance oil groove also moves down, move to the support that lock dog the inner loses the piston guide section, lock dog moves to the inside along guiding surface and leans on the inwall of balance oil groove, makes lower contact lose the support of lock dog, drop downwards and separate with tubing string, realize the safety disengagement, and do not need to rotate tubing string, and the utility model is simple in structure, interior latus rectum is big, the reliability height, easy to operate, be particularly suitable in the construction of coiled tubing workover treatment tubing string.
For guaranteeing the sealing performance of tubing string inner chamber, be respectively equipped with sealing ring one on the fitting face of described shear pin both sides sealing section, the top connection of described lock dog upside and the fitting face of lower contact are provided with sealing ring two.
Regain to salvage for ease of the lower contact back that comes off, the lower contact internal diameter of described annular groove upside is greater than the lower contact internal diameter of annular groove downside.
For guaranteeing the transmission of moment of torsion, described axial bond is axially symmetrically arranged two groups.
Description of drawings
Fig. 1 is the structural representation of hydraulic torque formula of the present utility model safety joint.
Fig. 2 is that Fig. 1 is at the sectional drawing at A-A place.
Fig. 3 is safety joint of the present utility model build the pressure schematic diagram of state of pitching when being blocked.
Fig. 4 is the state diagram of lower contact after throwing off.
Wherein, 1 top connection; The 1a seal section; 1b pressure balance section; The 1c guide section; 2 pistons; 3 sealing rings one; 4 shear pins; 5 balance oil holes; 6 balance oil grooves; The outer step of 6a; Step in the 6b; 7 lower contacts; The 7a annular groove; 8 sealing rings two; 9 lock dogs; The 9a guiding surface; 10 axial bonds.
The specific embodiment
As Fig. 1-Figure 4 shows that hydraulic torque formula of the present utility model safety joint, comprise top connection 1, be set with piston 2 in the top connection 1, the socket section of top connection 1 inwall and piston 2 outer walls comprises seal section 1a, pressure balance section 1b and guide section 1c from the top down successively, top connection 1 and shear pin 4 axial restraints of piston 2 by radially being arranged on seal section V; Be provided with annular balance oil groove 6 between the fitting face of pressure balance section 1b, piston 2 walls of balance oil groove 6 are provided with the balance oil hole 5 that is communicated with piston 2 endoporus, balance oil groove 5 outer walls and inwall interlock respectively downwards and are provided with interior step 6b and the outer step 6a that radially diminishes, step 6b and outer step 6a overlap mutually and stop the whereabouts in when piston 1 drops downwards, top connection 1 lower end is set with lower contact 7, top connection 1 is passed through lock dog 9 axial restraints with lower contact 7, lower contact 7 inwalls that are connected with top connection 1 are provided with annular groove 7a, lock dog 9 the inners lean the periphery of piston 2 guide sections and the upper end that the outer end is protruded top connection 1 outer wall and blocked the annular groove 7a that leans against lower contact, and annular groove 7a is provided with downward guiding surface 9a with the card that cooperates of lock dog 9 by the place, and top connection 1 and lower contact 7 linkage sections of annular groove 7a downside are provided with the symmetrically arranged two pairs of axial bonds 10 for driving torque; For guaranteeing the sealing performance of tubing string inner chamber, respectively be provided with two groups of sealing rings 1 on the fitting face of the seal section 1a of shear pin 4 both sides respectively, the top connection 1 of lock dog 9 upsides is provided with two groups of sealing rings 28 with the fitting face of lower contact 7; Regain to salvage for ease of lower contact 7 back that comes off, the lower contact internal diameter of annular groove 7a upside is greater than the lower contact internal diameter of annular groove downside.
When safety joint of the present utility model is installed on the operating tool string operate as normal, piston connects 1 by shear pin 4 with the higher authorities and fixes, top connection 1 is fixing by lock dog 9 with lower contact 7, balance oil groove 6 is used for the pressure differentials that dummy piston produces because sectional area is different about in the of 2, prevent that shear pin 4 accidents from cutting off, when coiled tubing workover treatment tubing string is blocked in construction, from the pitching of well head tubing string, suppress piston 2 from the top down, build the pressure from piston 2 upper port shear pin 4 nail is cut off, piston 2 makes the support of pin, 1c moves downward along guide section, the inwall of balance oil groove 6 also moves down, move to the support that lock dog 9 the inners lose piston guide section 1c, lock dog 9 moves to the inside along guiding surface 9a and leans on the inwall of balance oil groove 6, make lower contact 7 lose the support of lock dog 9, drop downwards and separate with top connection 1, realize the safety disengagement, and do not need to rotate tubing string, and the utility model is simple in structure, and interior latus rectum is big, the reliability height, easy to operate, be particularly suitable in the construction of coiled tubing workover treatment tubing string.
The utility model is not limited to above-described embodiment; for example; axial bond among the embodiment also can adopt spline structure or similar structures to transmit moment of torsion; every on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the scope of the utility model protection.
Claims (4)
1. hydraulic torque formula safety joint, it is characterized in that, comprise top connection, be set with piston in the described top connection, the socket section of top connection inwall and piston outer wall comprises seal section, pressure balance section and guide section from the top down successively, and described top connection and piston are by radially being arranged on the shear pin axial restraint of seal section; Be provided with annular balance oil groove between the fitting face of described pressure balance section, the piston wall of described balance oil groove is provided with the balance oil hole that is communicated with piston inner hole, described balance oil groove outer wall and inwall interlock respectively downwards and are provided with interior step and the outer step that radially diminishes, step and outer step overlap mutually and stop the whereabouts in when described piston drops downwards, the top connection lower end is set with lower contact, described top connection and lower contact are by the lock dog axial restraint, the lower contact inwall that is connected with top connection is provided with annular groove, described lock dog the inner leans the periphery of piston guide section and the top connection outer wall is protruded in the outer end and card leans against on the annular groove of lower contact, and annular groove is provided with downward guiding surface with the card that cooperates of lock dog by the place, and the top connection of described annular groove downside and lower contact linkage section are provided with the axial bond for driving torque.
2. hydraulic torque formula according to claim 1 safety joint is characterized in that, is respectively equipped with sealing ring one on the fitting face of described shear pin both sides sealing section, and the top connection of described lock dog upside and the fitting face of lower contact are provided with sealing ring two.
3. hydraulic torque formula according to claim 2 safety joint is characterized in that, the lower contact internal diameter of described annular groove upside is greater than the lower contact internal diameter of annular groove downside.
4. according to claim 2 or 3 described hydraulic torque formula safety joints, it is characterized in that described axial bond is axially symmetrically arranged two groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320069268 CN203129975U (en) | 2013-02-06 | 2013-02-06 | Hydraulic torque safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320069268 CN203129975U (en) | 2013-02-06 | 2013-02-06 | Hydraulic torque safety joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203129975U true CN203129975U (en) | 2013-08-14 |
Family
ID=48937966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320069268 Expired - Lifetime CN203129975U (en) | 2013-02-06 | 2013-02-06 | Hydraulic torque safety joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203129975U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761457A (en) * | 2016-12-30 | 2017-05-31 | 成都海猛石油机械有限公司 | A kind of full hydraulic adjustable rigidity bidirectional flexible short circuit |
| CN111946271A (en) * | 2019-05-14 | 2020-11-17 | 中国石油天然气集团有限公司 | Non-rotary joint for continuous pipe |
-
2013
- 2013-02-06 CN CN 201320069268 patent/CN203129975U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761457A (en) * | 2016-12-30 | 2017-05-31 | 成都海猛石油机械有限公司 | A kind of full hydraulic adjustable rigidity bidirectional flexible short circuit |
| CN106761457B (en) * | 2016-12-30 | 2018-09-04 | 成都海猛石油机械有限公司 | A kind of full hydraulic adjustable rigidity bidirectional flexible short circuit |
| CN111946271A (en) * | 2019-05-14 | 2020-11-17 | 中国石油天然气集团有限公司 | Non-rotary joint for continuous pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
|
| CX01 | Expiry of patent term |