CN204677123U - A kind of offshore drill knock-off joint - Google Patents
A kind of offshore drill knock-off joint Download PDFInfo
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- CN204677123U CN204677123U CN201520367259.XU CN201520367259U CN204677123U CN 204677123 U CN204677123 U CN 204677123U CN 201520367259 U CN201520367259 U CN 201520367259U CN 204677123 U CN204677123 U CN 204677123U
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- reinforcing rib
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- helicla flute
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Abstract
The utility model discloses a kind of offshore drill knock-off joint, comprise male joint and female joint, described male joint and female joint have external screw thread and the internal thread of coupling mutually, all tapered shoulders is provided with away from one end of its male end and female joint away from one end of its female end in male joint, described tapered shoulders is interval with the reinforcing rib of some helical structures, between adjacent described reinforcing rib, forms helicla flute.Offshore drill knock-off joint of the present utility model, owing to tapered shoulders being interval with reinforcing rib and the helicla flute of some helical structures, make that offshore drill knock-off joint torsional strength is high, load capacity is large, stress distribution is even, meet the antitorque requirement of height of offshore drill bar drill ultradeep well.And reinforcing rib and helicla flute also have quickening circulation of drilling fluid, improve the advantages such as Anti-erosion wear resistance, ocean drilling rod premature abrasion can be prevented to lose efficacy, thus extend Life of drill rod, improve drilling efficiency, shorten drilling period, reduce drilling cost.
Description
Technical field
The utility model relates to for offshore oil natural gas exploration equipment technical field, particularly relates to a kind of offshore drill knock-off joint.
Background technology
Drilling rod is the important tool of drilling well work, and it is the important component part of drill string.In drilling process, drilling rod plays an important role, and as carried drilling fluid to shaft bottom, to drill bit transmitting torque, removes drill bit, process down-hole accident, test etc.
In marine drilling process, the dispersion that different drilling fluids is formed is different, and role is different.From physical chemistry viewpoint, drilling fluid is a kind of heterogeneous Unstable Systems.For meeting drilling technology requirement, improving property of drilling fluid, in drilling fluid of being everlasting, adding various different additive.Drilling fluid, in cyclic process, can not remain its premium properties, and will by drilling cuttings, oil, gas, water, salt and mineral pollution, and wherein drilling cuttings is the most serious pollution.
In marine drilling process, ocean drilling rod is positioned at well and sleeve pipe, and the drilling fluid carrying a large amount of cutting grain returns to earth's surface on the annulus between ocean drilling rod and well, internal surface of sleeve pipe.When drilling fluid is through offshore drill knock-off joint position, because ocean drill pipe body exists transition shoulder to joint, under the effect of inertia, cutting grain and joint shoulder collide, and produce erosive wear.And offshore drill knock-off joint place stress distribution is uneven, torsional strength is low, easily cause offshore drill knock-off joint to rupture, damage, to such an extent as to ocean drilling rod cannot uses; The erosive wear of offshore drill knock-off joint local can cause offshore drill knock-off joint that thorn leakage occurs, cause flow passage inside and outside the drilling rod of ocean, ocean drilling rod inner high voltage drilling fluid enters in annulus, and build-up of pressure loses, and reduces the service behaviour of drilling fluid, during serious wear, offshore drill knock-off joint intensity reduces, and causes ocean drill rod breaking, causes drilling failure, drilling efficiency reduces, and drilling cost increases.
Along with the increase of drilling depth, for increasing the stability of the borehole wall, avoiding differential sticking, reservoir protec-tion, the heavy part (as barite) of solid phase must be added in drilling fluid, to increase drilling fluid density.But along with the increase of drilling fluid density, rate of penetration will decline rapidly, and bit wear obviously aggravates.Therefore need drilling fluid in time a large amount of cutting grains carried to be delivered to earth's surface.
Drilling fluid carries a large amount of cutting grain on the annulus between ocean drilling rod and well, internal surface of sleeve pipe, returns power resources Yu Haiyang drilling rod inner flow passage pressure to earth's surface, when drilling fluid upwards returns, along with the rising of height, pressure reduces fluid circulation rate and reduces.Therefore landwaste deposition easily occurs, increase ocean drilling rod pressure, accelerate ocean drill rod abrasion, cause ocean drill rod breaking, cause drilling failure time serious, drilling efficiency reduces, and drilling cost increases.
The solid phases such as the landwaste carried in drilling fluid easily block gas channel, when drilling liquid pressure is greater than strata pressure, drilling fluid permeates to stratum, is less than the solid phases such as the landwaste of hydrocarbon stratum passage thereupon deeply, forms blocking, pressure leaks stratum, make the easy mud drum of drill bit, pull out of hole and pull out piston, bring out blowout, lower brill causes pressure excited, cause leakage, final polluted reservoir.And a large amount of landwaste depositions can reduce rate of penetration.
In drilling fluid the solid phase such as landwaste can not effectively removal mud cake can be made to fluff, thickening, cause dehydration large, the borehole wall easily caves in; Well diminishes, easy bit freezing; Cause differential sticking.The solid precipitations such as a large amount of landwaste can increase friction factor, increase moment of torsion, power consumption are increased, and easily causes drilling tool accident, reduce drill tool life.
Utility model content
Problem to be solved in the utility model is, for above-mentioned shortcoming of the prior art, propose that there is a kind of offshore drill knock-off joint that Anti-erosion wear resistance is strong, accelerate fluid circulation rate, increase the advantages such as solid phase clearance such as landwaste, thus prolongation Life of drill rod, improve drilling efficiency, reduce drilling cost.
For solving the problem, the scheme that the utility model adopts is as follows: a kind of offshore drill knock-off joint, comprise: male joint and female joint, described male joint and female joint have external screw thread and the internal thread of coupling mutually, all tapered shoulders is provided with away from one end of its male end and female joint away from one end of its female end in male joint, described tapered shoulders is interval with the reinforcing rib of some helical structures, between adjacent described reinforcing rib, forms helicla flute.
Further, the lateral cross section shape of reinforcing rib can be various, and triangle is trapezoidal etc., through putting into practice the lateral cross section of our preferred described reinforcing rib for semicircle or parallelogram.
Further, the thickness a of described reinforcing rib is 3-25mm, and described spiral fluted thickness is identical with the thickness of described reinforcing rib.
Further, the width b of described reinforcing rib is 5-25mm, and described spiral fluted width is identical with the width of described reinforcing rib.
Further, each described reinforcing rib is the strip projection extended spirally along tapered shoulders external surface, described reinforcing rib is spirally extended to lower sideline along the upper sideline of tapered shoulders, and the two ends of described reinforcing rib are 90 °-360 ° around the axis anglec of rotation α of offshore drill knock-off joint.Described helicla flute rotates identical along the anglec of rotation α of tapered shoulders with reinforcing rib to the angle beta of lower sideline along the upper sideline of tapered shoulders.
Technique effect of the present utility model is as follows: owing to have employed technique scheme, a kind of offshore drill knock-off joint of the present utility model, comprise: male joint and female joint, described male joint and female joint have external screw thread and the internal thread of coupling mutually, all tapered shoulders is provided with away from one end of its male end and female joint away from one end of its female end in male joint, tapered shoulders is interval with the reinforcing rib of some helical structures, between adjacent described reinforcing rib, forms helicla flute, male joint in offshore drill knock-off joint of the present utility model and female joint are welded in respectively the two ends of ocean drill pipe body, in drilling process, ocean drilling rod is positioned at well, carry the drilling fluid of a large amount of cutting grain through ocean drilling rod and well, annulus between internal surface of sleeve pipe returns to earth's surface, owing to tapered shoulders being interval with the helicla flute formed between the reinforcing rib of some helical structures and reinforcing rib, when drilling liquid flow is through offshore drill knock-off joint of the present utility model, helicla flute can be shunted the drilling fluid at the offshore drill knock-off joint tapered shoulders position arriving helical structure and is divided into a plurality of fluids, thus change same come the direction of motion of the solid phase particles such as landwaste of flow path direction, butt joint shoulder is avoided to cause local erosion, and the lifting being designed to drilling fluid of helical structure provides power, avoid the deposition of the solid phases such as landwaste.Flow field with reinforcing rib and spiral fluted offshore drill knock-off joint tapered shoulders near surface is more complicated, and the disturbance of a plurality of fluids changes movement velocity and the angle of the solid phase particles such as landwaste, is conducive to reducing joints wear; The reinforcing rib that offshore drill knock-off joint tapered shoulders is arranged and helicla flute can increase the contact area of the solid phase particles such as landwaste and tapered shoulders, thus can reduce the solid phases such as landwaste to the erosion strength in offshore drill knock-off joint unit area.
A kind of offshore drill knock-off joint of the present utility model, the reinforcing rib of its helical structure and helicla flute design, in use, can to pressurization while drilling fluid shunting, helical structure is as turbocharging, ensure that the balance of ocean drilling rod external and internal pressure, improve the cycle rate of drilling fluid, and landwaste clearance.Be applied to mohole drilling, be especially applied in marine drilling, can effectively be promoted drilling fluid by the reinforcing rib and helicla flute that are arranged at the helical structure of joint, prevent from causing solid phase precipitation in drilling fluid because drilling liquid flow prompt drop is low, make the increase of drilling fluid density, finally cause rate of penetration to decline rapidly, bit wear aggravates.When drilling liquid flow is through offshore drill knock-off joint of the present utility model, the reinforcing rib of helical structure and helicla flute can upward pressure for drilling fluid provides, everywhere offshore drill knock-off joint all provides and upwards pressure, and everywhere offshore drill knock-off joint all can promote cutting grain, form an interim Lifting scheme.The reinforcing rib of the utility model helical structure and helicla flute effectively can promote cutting grain, prevent cutting grain from depositing, and the cutting grain can effectively removed in drilling fluid ensures the premium properties of drilling fluid.
In sum, offshore drill knock-off joint of the present utility model, owing to tapered shoulders being interval with reinforcing rib and the helicla flute of some helical structures, the lifting that the offshore drill knock-off joint of helical structure is landwaste provides interim power, avoids landwaste deposition, and Anti-erosion wear resistance is strong, ocean drilling rod premature abrasion can be prevented to lose efficacy, thus extend ocean Life of drill rod, improve drilling efficiency, shorten drilling period, reduce drilling cost.
Accompanying drawing explanation
Fig. 1 is male joint structural representation.
Fig. 2 is female joint structural representation.
Fig. 3 is that reinforcing rib extends spirally structural representation.
Fig. 4 is tapered shoulders longitudinal cross-section structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further details.
A kind of offshore drill knock-off joint, as shown in Figure 1, Figure 2, Figure 3, Figure 4, comprise: male joint 1 and female joint 2, described male joint 1 and female joint 2 have external screw thread 11 and the internal thread 21 of coupling mutually, tapered shoulders 5 is all provided with away from one end of its external screw thread 11 end and female joint 2 away from one end of its internal thread 21 end in male joint 1, described tapered shoulders 5 is interval with the reinforcing rib 3 of some helical structures, between adjacent described reinforcing rib 3, forms helicla flute 4.It can be turn clockwise that reinforcing rib 3 extends spirally along tapered shoulders 5 external surface, also can be rotated counterclockwise, select according to the actual requirements.
The lateral cross section shape of reinforcing rib 3 can be various, and triangle is trapezoidal etc., and the lateral cross section of the preferred described reinforcing rib 3 of the utility model is semicircle or parallelogram.
Reinforcing rib 3 extends spirally along tapered shoulders 5, and the thickness a that reinforcing rib 3 protrudes tapered shoulders 5 external surface is 3-25mm, and the degree of depth of described helicla flute 4 is identical with the thickness of described reinforcing rib 3.
The width b of reinforcing rib 3 lateral cross section is 5-25mm, and the width of described helicla flute 4 is identical with the width of described reinforcing rib 3.
It is protruding that every bar reinforcing rib 3 is all the strip extended spirally along tapered shoulders 5 external surface, reinforcing rib 3 rotates along tapered shoulders 5 external surface helical form and extends, the two ends of reinforcing rib 3 extend to upper sideline 51 and the lower sideline 52 of tapered shoulders 5 external surface respectively, reinforcing rib 3 is spirally extended to lower sideline 52 along the upper sideline 51 of tapered shoulders 5, and the two ends of described reinforcing rib 3 are preferably 90 °-360 ° around axis 6 anglec of rotation α span of offshore drill knock-off joint.Be parallel to each other between every two reinforcing ribs 3, and form helicla flute 4, helicla flute 4 also extends spirally along tapered shoulders 5 external surface with reinforcing rib 3, the two ends of helicla flute 4 extend to top 51 line and the lower sideline 52 of the external surface of tapered shoulders 5 respectively, helicla flute 4 rotates to lower sideline 52 along the upper sideline 51 of tapered shoulders 5, and the two ends of helicla flute 4 are identical along the anglec of rotation α of tapered shoulders 5 with reinforcing rib 3 around axis 6 anglec of rotation β of offshore drill knock-off joint.
Male joint 1 in offshore drill knock-off joint of the present utility model and female joint 2 are connected to respectively the two ends of ocean drill pipe body, usually male joint 1 is connected to the lower end of ocean drill pipe body in using, female joint 2 is connected to the upper end of ocean drill pipe body, and a upper ocean drilling rod is connected with the female joint 2 of next root ocean drilling rod by male joint 1.In marine drilling process, drilling fluid carries a large amount of cutting grains through ocean drilling rod and well, annulus between internal surface of sleeve pipe is upwards back to earth's surface, owing to the tapered shoulders 5 of male joint 1 and female joint 2 being all provided with reinforcing rib 3 and the helicla flute 4 of some helical structures, when drilling liquid flow is through offshore drill knock-off joint of the present utility model, the reinforcing rib 3 of helical structure and helicla flute 4 can upward pressure for drilling fluid provides, everywhere offshore drill knock-off joint all provides and upwards pressure, and everywhere offshore drill knock-off joint all can promote cutting grain, form an interim Lifting scheme.Reinforcing rib 3 and the helicla flute 4 of the utility model helical structure effectively can promote cutting grain, prevent cutting grain from depositing, and the cutting grain can effectively removed in drilling fluid ensures the premium properties of drilling fluid.
When drilling liquid flow is through offshore drill knock-off joint of the present utility model, helicla flute 4 can be shunted the drilling fluid arriving offshore drill knock-off joint tapered shoulders 5 position and is divided into a plurality of fluids, thus change same come the direction of motion of the solid phase particles such as landwaste of flow path direction, butt joint shoulder 5 is avoided to cause local erosion, flow field with offshore drill knock-off joint tapered shoulders 5 near surface of reinforcing rib 3 and helicla flute 4 is more complicated, the disturbance of a plurality of fluids changes movement velocity and the angle of the solid phase particles such as landwaste, is conducive to reducing joints wear; The reinforcing rib 3 that offshore drill knock-off joint tapered shoulders 5 is arranged and helicla flute 4 can increase the contact area of the solid phase particles such as landwaste and tapered shoulders, thus can reduce the solid phases such as landwaste to the erosion strength in offshore drill knock-off joint unit area.
In sum, offshore drill knock-off joint of the present utility model, owing to tapered shoulders 5 being interval with reinforcing rib 3 and the helicla flute 4 of some helical structures, the lifting that the offshore drill knock-off joint of helical structure is landwaste provides interim power, avoids landwaste deposition, and Anti-erosion wear resistance is strong, ocean drilling rod premature abrasion can be prevented to lose efficacy, thus extend ocean Life of drill rod, improve drilling efficiency, shorten drilling period, reduce drilling cost.
The above is only the citing of the utility model better embodiment; the part wherein do not addressed in detail is the common practise of those of ordinary skill in the art; protection domain of the present utility model is as the criterion with the content of claim, and any equivalent transformation carried out based on technology enlightenment of the present utility model is all within protection domain of the present utility model.
Claims (5)
1. an offshore drill knock-off joint, comprise male joint (1) and female joint (2), described male joint (1) and female joint (2) have external screw thread (11) and the internal thread (21) of coupling mutually, it is characterized in that, the one end of holding away from its external screw thread (11) in male joint (1) and female joint (2) are all provided with tapered shoulders (5) away from one end that its internal thread (21) is held, described tapered shoulders (5) is interval with the reinforcing rib (3) of some helical structures, between adjacent described reinforcing rib (3), forms helicla flute (4).
2. offshore drill knock-off joint as claimed in claim 1, is characterized in that, the lateral cross section of described reinforcing rib (3) is semicircle or parallelogram.
3. offshore drill knock-off joint as claimed in claim 1, is characterized in that, the thickness a that described reinforcing rib (3) protrudes tapered shoulders (5) external surface is 3-25mm, and the degree of depth of described helicla flute (4) is identical with the thickness of described reinforcing rib (3).
4. offshore drill knock-off joint as claimed in claim 1, it is characterized in that, the width b of described reinforcing rib (3) is 5-25mm, and the width of described helicla flute (4) is less than or equal to the width of described reinforcing rib (3).
5. offshore drill knock-off joint as claimed in claim 1, it is characterized in that, described reinforcing rib (3) is spirally extended to lower sideline (52) along the upper sideline (51) of tapered shoulders (5), and the two ends of described reinforcing rib (3) are 90 °-360 ° around axis (6) anglec of rotation α of offshore drill knock-off joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367259.XU CN204677123U (en) | 2015-06-01 | 2015-06-01 | A kind of offshore drill knock-off joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367259.XU CN204677123U (en) | 2015-06-01 | 2015-06-01 | A kind of offshore drill knock-off joint |
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| Publication Number | Publication Date |
|---|---|
| CN204677123U true CN204677123U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520367259.XU Active CN204677123U (en) | 2015-06-01 | 2015-06-01 | A kind of offshore drill knock-off joint |
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| CN (1) | CN204677123U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863521A (en) * | 2015-06-01 | 2015-08-26 | 江苏和信石油机械有限公司 | Ocean drill rod connector |
-
2015
- 2015-06-01 CN CN201520367259.XU patent/CN204677123U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863521A (en) * | 2015-06-01 | 2015-08-26 | 江苏和信石油机械有限公司 | Ocean drill rod connector |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |