CN204703834U - Integrated wellhead column hitch - Google Patents
Integrated wellhead column hitch Download PDFInfo
- Publication number
- CN204703834U CN204703834U CN201520374310.XU CN201520374310U CN204703834U CN 204703834 U CN204703834 U CN 204703834U CN 201520374310 U CN201520374310 U CN 201520374310U CN 204703834 U CN204703834 U CN 204703834U
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- retaining sleeve
- disc
- clamping driving
- interior pipe
- pipe hanger
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Abstract
A kind of integrated wellhead column hitch, comprises tubing string, lower tubular column and interior pipe hanger.Described interior pipe hanger is positioned at tubing string and lower tubular column, described interior pipe hanger is set with retaining sleeve, retaining sleeve inwall and interior pipe hanger wall contacts, described upper tubing string lower end and lower tubular column upper end are all provided with clamping driving-disc, two clamping driving-discs are all sleeved on retaining sleeve by the inner groove arranged, be connected by bindiny mechanism between two clamping driving-discs, two clamping driving-discs inner groove all with retaining sleeve wall contacts, contact surface between the inner groove of a clamping driving-disc and retaining sleeve is lozenges, position-limit mechanism is provided with between the inner groove of another clamping driving-disc and retaining sleeve.Clamping driving-disc on integrated wellhead column hitch on tubing string and lower tubular column is by driving pipe hanger in retaining sleeve clamping, and clamping driving-disc is incorporated on tubing string, easy disassembling.
Description
Technical field
The utility model relates to oil gas field, specifically integrated wellhead column hitch.
Background technology
In oil, gas well liquid loading operation, conventional way be in subtend well under the oil pipe that enters or sleeve pipe, outmost sleeve pipe is fixed on ground, on the shaft shoulder that the sleeve pipe of the inside is seated in casing head housing, casing head spool, tubing head four-way respectively or on the shaft shoulder of the casing hanger of outer layer sleeve.
But after well cementation, because the change of downhole temperature and pressure can make oil pipe or sleeve pipe axial dimension extend, wellhead column can produce thrust upwards, down-hole string annular space or overpressure fluctuation simultaneously also can make wellhead column generation thrust upwards, easily cause the seal failure of wellhead column hanger, and therefore hanger can cannot be fully seated in setting with on the shaft shoulder of well head four-way, makes wellhead column and wellhead equipment be in underconstrained state, produces more many-sided potential safety hazard.A kind of wellhead column of specification is often entered down in drilling process, will the preventer of a kind of specification of dismounting and change, in replacing preventer process, well head is in runaway condition, adds operating risk, frequent preventer of changing causes the operation task time to increase simultaneously, and therefore operating cost is high.The complicated structure of traditional wellhead column hitch, number of parts is many, and volume is large, therefore plant maintenance is loaded down with trivial details and complicated, costly, and cannot apply the offshore platform limited with working space, the labour intensity of installation exercise and maintenance is large, and the activity duration is long, and security risk is high.
Utility model content
The utility model, for above-mentioned the deficiencies in the prior art, devises a kind of integrated wellhead column hitch.
Integrated wellhead column hitch of the present utility model, comprises tubing string, lower tubular column and interior pipe hanger.
Described interior pipe hanger is positioned at tubing string and lower tubular column, and described interior pipe hanger is set with retaining sleeve, retaining sleeve inwall and interior pipe hanger wall contacts,
Described upper tubing string lower end and lower tubular column upper end are all provided with clamping driving-disc, and two clamping driving-discs are all sleeved on retaining sleeve by the inner groove arranged, and are connected between two clamping driving-discs by bindiny mechanism,
The inner groove of two clamping driving-discs all with retaining sleeve wall contacts, the contact surface between the clamping inner groove of driving-disc and retaining sleeve is lozenges, is provided with position-limit mechanism between the inner groove of another clamping driving-disc and retaining sleeve.
Preferably, described linkage is bolt or hydraulic clamp.
Preferably, the width of described lozenges narrows laterally gradually from centre.
Preferably, described position-limit mechanism comprises the stopper slot be arranged on retaining sleeve outer wall.
Preferably, described stopper slot inwall is provided with sealing ring.
Preferably, described interior pipe hanger outer wall is provided with annular projection, and the width of described annular projection is greater than the length of retaining sleeve.
Preferably, described annular projection is provided with sealing flange on the surface, and described sealing flange is axially provided with multiple.
The beneficial effects of the utility model are: the clamping driving-disc on integrated wellhead column hitch on tubing string and lower tubular column is by driving pipe hanger in retaining sleeve clamping, clamping driving-disc is incorporated on tubing string, easy disassembling, structure is simple and compact, and volume is little, and number of parts is few, Operation and Maintenance is convenient, maintenance cost is low, can be applicable to the dry type on the exploratory well of the limited offshore platform of working space, producing well and jack-up unit and floating platform wet type well head, applied range.
A clamping driving-disc is fixed relative to retaining sleeve, and another clamping driving-disc produces clamping force by lozenges, make retaining sleeve produce clamping force rapidly when enabling two to clamp the motion of the driving-disc imagination, fixed effect produces fast, is conducive to the disassembling, assembling and replacing of tubing string.
Also sealing effectiveness is served while hanging tubing string, solve the seal failure problem that conventional suspension mode easily occurs, avoid the potential safety hazard of production operation, need not often the lower wellhead column as a kind of specification will the preventer of a kind of specification of dismounting and change, avoid well head and be in runaway condition, decrease the activity duration and operating cost that bring thus, ensure job safety.In stopper slot, sealing ring is installed, ensure that retaining sleeve does not produce the sealing effectiveness of the part of clamping force.
The annular projection that interior pipe hanger is arranged ensures its compactness contacted with retaining sleeve, improves frictional force, increases clamping effect.The width of annular projection is greater than the length of retaining sleeve, enables retaining sleeve all touch interior pipe hanger annular projection, improves frictional force further, reach better clamping and sealing effectiveness.The sealing flange that annular projection is arranged makes contact surface more coarse, improves frictional force, increases clamping effect, and sealing flange also serves the effect of sealing ring simultaneously, further increases sealing performance.
Tubing string hangs the suspended structure adopted without the fixing shaft shoulder, so tubing string hanging position can suitably adjust according to actual job situation and clamp.Be convenient to the installation exercise of wellhead equipment, solve the change due to down-hole geological conditions simultaneously, make tubular column structure change in size and destroy the duty of well head safe operation.
Accompanying drawing explanation
Accompanying drawing 1 is the sectional structure chart of integrated wellhead column hitch.
Detailed description of the invention
Integrated wellhead column hitch of the present utility model, as shown in Figure 1, comprises tubing string 1, lower tubular column 2 and interior pipe hanger 3, and interior pipe hanger 3 is the parts needing to carry out hanging, and other need the tubing string hung to be connected on interior pipe hanger 3.
Interior pipe hanger 3 is positioned at tubing string 1 and lower tubular column 2, and described interior pipe hanger 3 is set with retaining sleeve 4, retaining sleeve 4 inwall and interior pipe hanger 3 wall contacts.
Upper tubing string 1 lower end and lower tubular column 2 upper end are all provided with clamping driving-disc 5, two clamping driving-disc 5 all pass through arrange inner groove 6 be sleeved on retaining sleeve 4, two clamping driving-discs 5 between by bolt 7, hydraulic clamp etc. can realize connection be connected with fastening bindiny mechanism.
Two clamping driving-discs 5 inner groove 6 all with retaining sleeve 4 wall contacts.
Contact surface between the inner groove 6 of a clamping driving-disc 5 and retaining sleeve 4 is lozenges, and the width of lozenges narrows laterally gradually from centre; Be provided with position-limit mechanism between the inner groove 6 of another clamping driving-disc 5 and retaining sleeve 4, position-limit mechanism comprises the stopper slot 8 be arranged on retaining sleeve 4 outer wall.
When bolt 7 screws gradually, two clamping driving-discs 5 are thought middle close gradually, the limited groove of one of them clamping driving-disc 5 is fixed on a position, another clamping driving-disc 5 is made to carry out axially-movable relative to retaining sleeve 4, by the lozenges press nip cover 4 of retaining sleeve 4, produce radial clamping force, make retaining sleeve 4 hold interior pipe hanger 3 tightly, in realizing, the suspension of pipe hanger 3 is fixed.
Because the clamping force of the radial direction of axial-movement generation can make clamping driving-disc 5 and retaining sleeve 4 close contact, the effect of sealing can be played, the part that retaining sleeve 4 is provided with stopper slot 8 does not then have clamping force, stopper slot 8 inwall can be provided with sealing ring 9, the sealing effectiveness of this part can be strengthened, ensure overall sealing performance.
Interior pipe hanger 3 outer wall is provided with annular projection 10, the compactness that in increasing, pipe hanger 3 contacts with retaining sleeve 4, improves clamping force.The width of annular projection 10 is greater than the length of retaining sleeve 4, and retaining sleeve 4 inwall all can be contacted with interior pipe hanger 3, increases contact area, improves frictional force, strengthens clamping and sealing effectiveness.Annular projection 10 is provided with sealing flange on the surface, and sealing flange is axially provided with multiple, makes contact surface more coarse, improves frictional force, increases clamping effect, and sealing flange also serves the effect of the sealing ring of multilayer simultaneously, further increases sealing performance.
Claims (7)
1. an integrated wellhead column hitch, is characterized in that, comprises tubing string (1), lower tubular column (2) and interior pipe and hangs
Device (3),
Described interior pipe hanger (3) is positioned at tubing string (1) and lower tubular column (2), described interior pipe hanger (3) is set with retaining sleeve (4), retaining sleeve (4) inwall and interior pipe hanger (3) wall contacts
Described upper tubing string (1) lower end and lower tubular column (2) upper end are all provided with clamping driving-disc (5), two clamping driving-disc (5) all pass through setting inner groove (6) be sleeved on retaining sleeve (4), be connected by bindiny mechanism between two clampings driving-disc (5)
Two clamping driving-disc (5) inner groove (6) all with retaining sleeve (4) wall contacts, contact surface between the inner groove (6) of clamping driving-disc (5) and retaining sleeve (4) is lozenges, is provided with position-limit mechanism between the inner groove (6) of another clamping driving-disc (5) and retaining sleeve (4).
2. integrated wellhead column hitch according to claim 1, is characterized in that, described linkage is bolt (7) or hydraulic clamp.
3. integrated wellhead column hitch according to claim 1, it is characterized in that, the width of described lozenges narrows laterally gradually from centre.
4. integrated wellhead column hitch according to claim 1, is characterized in that, described position-limit mechanism comprises the stopper slot (8) be arranged on retaining sleeve (4) outer wall.
5. integrated wellhead column hitch according to claim 3, is characterized in that, described stopper slot (8) inwall is provided with sealing ring (9).
6. integrated wellhead column hitch according to claim 1, it is characterized in that, described interior pipe hanger (3) outer wall is provided with annular projection (10), and the width of described annular projection (10) is greater than the length of retaining sleeve (4).
7. integrated wellhead column hitch according to claim 6, is characterized in that, described annular projection (10) is provided with sealing flange on the surface, and described sealing flange is axially provided with multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520374310.XU CN204703834U (en) | 2015-03-25 | 2015-06-03 | Integrated wellhead column hitch |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520169203 | 2015-03-25 | ||
| CN2015201692033 | 2015-03-25 | ||
| CN201520374310.XU CN204703834U (en) | 2015-03-25 | 2015-06-03 | Integrated wellhead column hitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204703834U true CN204703834U (en) | 2015-10-14 |
Family
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520372968.7U Active CN204703833U (en) | 2015-03-25 | 2015-06-03 | Integrated wellhead column hitch |
| CN201520374336.4U Active CN204703814U (en) | 2015-03-25 | 2015-06-03 | Integral type wellhead column hitch |
| CN201520374310.XU Active CN204703834U (en) | 2015-03-25 | 2015-06-03 | Integrated wellhead column hitch |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520372968.7U Active CN204703833U (en) | 2015-03-25 | 2015-06-03 | Integrated wellhead column hitch |
| CN201520374336.4U Active CN204703814U (en) | 2015-03-25 | 2015-06-03 | Integral type wellhead column hitch |
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| CN (3) | CN204703833U (en) |
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2015
- 2015-06-03 CN CN201520372968.7U patent/CN204703833U/en active Active
- 2015-06-03 CN CN201520374336.4U patent/CN204703814U/en active Active
- 2015-06-03 CN CN201520374310.XU patent/CN204703834U/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN204703833U (en) | 2015-10-14 |
| CN204703814U (en) | 2015-10-14 |
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