CN108643848B - Sucker rod full protector - Google Patents
Sucker rod full protector Download PDFInfo
- Publication number
- CN108643848B CN108643848B CN201810632411.0A CN201810632411A CN108643848B CN 108643848 B CN108643848 B CN 108643848B CN 201810632411 A CN201810632411 A CN 201810632411A CN 108643848 B CN108643848 B CN 108643848B
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- China
- Prior art keywords
- sucker rod
- early warning
- full
- full protector
- protector
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- 230000001012 protector Effects 0.000 title claims abstract description 171
- 238000005086 pumping Methods 0.000 claims abstract description 48
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 230000005856 abnormality Effects 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 5
- 239000003129 oil well Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a sucker rod full protector, relates to the technical field of petroleum, and solves the technical problem that equipment is damaged and economic loss is caused by the fact that a righting tool in the prior art has no early warning effect. Including full protector body and early warning structure, full protector body cover is established outside the sucker rod, the sucker tube cover is established outside full protector body, the axis between full protector body and sucker rod coincides and the perpendicular distance of the shortest department of early warning structure distance axis is not less than the perpendicular distance of the widest department of sucker rod distance axis, make early warning structure grind the sucker tube before the sucker rod all the time, when full protector body takes place the eccentric wear and grind to early warning structure with the sucker tube, can make early warning structure and full protector body separation initiation pumping system unusual in order to play the early warning effect, the user just can discover the problem under the condition that sucker rod and sucker tube do not damage, thereby play the early warning effect.
Description
Technical Field
The invention relates to the technical field of petroleum, in particular to a sucker rod full protector.
Background
The problem of eccentric wear of the pipe string has been accompanied up to now since the day of the birth of the rod-pumped well. The maintenance operation frequency of the pumping well is increased, the production time rate is reduced, the production cost is increased, and the stratum pollution is aggravated during operation, so that the eccentric wear problem is solved to a certain extent by the invention and the method for continuously improving the righting tool.
The sucker rod moves up and down in the oil pipe, because the well deviation and the bending deformation of the sucker rod, the rod and the oil pipe wall easily generate friction, the sucker rod is easy to break and take off, the sucker rod centralizer is mostly made of high-strength wear-resistant materials, meanwhile, the sucker rod centralizer has the characteristic of strong flexibility, is connected to the sucker rod and contacts with the inner wall of the oil pipe, the outer diameter of the centralizer is designed to be larger than the outer diameter of a sucker rod coupling, the oil pipe contacts with the centralizer firstly to enable the centralizer to be worn, friction between the sucker rod and the oil pipe is replaced, the purpose of preventing eccentric wear is achieved, and the oil extraction service life of the oil pumping machine is prolonged.
The applicant found that the prior art has at least the following technical problems:
the existing righting tool has no early warning effect, and only when the sucker rod is broken, the oil pipe is leaked, so that the problem can be found, and under the condition, the righting tool needs to be replaced, and the sucker rod and the oil pipe also need to be replaced, so that serious economic loss is caused.
Disclosure of Invention
The invention aims to provide a sucker rod full protector, which solves the technical problem that in the prior art, a righting tool has no early warning effect, so that equipment is damaged and economic loss is caused. The preferred technical solutions of the technical solutions provided by the invention can produce a plurality of technical effects (difficult to repeat, low in cost and convenient to use) as described in detail below.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a sucker rod full protector, which comprises a full protector body and an early warning structure, wherein the full protector body is sleeved outside a sucker rod, the sucker rod is sleeved on the periphery of the full protector body, and the full protector body is provided with the early warning structure; the axes of the full protector body and the sucker rod are coincident, and the vertical distance between the shortest position of the early warning structure and the axis is not smaller than the vertical distance between the widest position of the sucker rod and the axis; the whole protector body and the oil pumping pipe are subjected to eccentric wear and can be separated from the whole protector body to cause the abnormality of the oil pumping system when being worn to the early warning structure, so that the early warning effect is achieved.
Preferably, the sucker rod comprises a sucker rod body and a coupling arranged at one end of the sucker rod body, and the vertical distance between the early warning structure and the shortest position of the axis is not smaller than the vertical distance between the widest position of the coupling and the axis.
Preferably, the full protector body comprises an outer ring, an inner ring and a connecting structure, the early warning structure is arranged on the inner side wall of the outer ring, the inner ring is sleeved on the oil pumping rod body, the outer ring is sleeved outside the inner ring and fixedly connected with the inner ring through the connecting structure, and when the outer ring and the oil pumping pipe are subjected to eccentric wear and are ground to the early warning structure, the early warning structure is separated from the outer ring to cause the abnormality of the oil pumping system so as to play a role in early warning.
Preferably, the early warning structure is an early warning groove formed in the inner side wall of the outer ring or an early warning strip fixed on the outer side wall of the outer ring, the outer ring and the oil pumping pipe are in eccentric wear, and when the early warning groove or the early warning strip is worn, the early warning groove or the early warning strip is separated from the outer ring to cause the abnormality of the oil pumping system so as to play a role in early warning.
Preferably, the sucker rod full protector is an eye type full protector, the outer ring is an elliptical ring, the inner ring is two arc plates, the connecting structure is a rib plate, the elliptical ring is fixedly connected with the arc plates through the rib plate in the short axis direction, and the arc plates are sleeved on the sucker rod body and provided with gaps so that the eye type full protector and the sucker rod body can rotate relatively along the axial direction of the sucker rod body.
Preferably, both end surfaces of the eye-type full protector are arranged in a horn mouth shape, and the upper end surface and the lower end surface of the eye-type full protector are provided with limiting hoops so as to limit the eye-type full protector to axially move on the oil pumping rod body.
Preferably, the sucker rod full protector is a cylindrical full protector, the outer ring and the inner ring are circular rings, the connecting structure is a supporting rib plate, one end of the supporting rib plate is fixedly connected with the surface of the circular ring of the inner ring, and the other end of the supporting rib plate is fixedly connected with the inner wall of the circular ring of the outer ring.
Preferably, the sucker rod full protector is a fan-shaped full protector, the fan-shaped full protector is axially divided into two sub-fan-shaped full protectors with coaxial lines, the outer ring is two arc plates, the inner ring is a circular ring, the connecting structure is four rib plates, the ends of the arc plates are fixedly connected with the circular ring through the four rib plates to form a fan-shaped plate group, each sub-fan-shaped full protector comprises one fan-shaped plate group, and the two fan-shaped plate groups are coaxial and are arranged at 90 degrees in a staggered mode.
Preferably, the upper end and the lower end of the sucker rod full protector are provided with transition belts, and the upper end and the lower end of the sucker rod full protector are both arranged in a horn mouth shape.
Preferably, the sucker rod is provided with a concave mark, the full protector body is provided with convex marks corresponding to the concave marks in position, the number of the concave marks and the number of the convex marks are four, and a group of the convex marks are marked every 90 degrees on the circumference of the full protector body.
The full protector body is sleeved outside the sucker rod and sleeved in the oil pumping pipe together, so that the full protector is firstly in eccentric wear with the oil pumping pipe, the axes of the full protector body and the sucker rod are overlapped, the vertical distance between the early warning structure and the shortest position of the axis is not smaller than the vertical distance between the widest position of the sucker rod and the axis, the early warning structure always grinds the oil pumping pipe before the sucker rod, and when the full protector body and the oil pumping pipe are in eccentric wear and grind to the early warning structure, the early warning structure and the full protector body are separated to cause the abnormal oil pumping system to play a role in early warning, so that a user can find a problem under the condition that the sucker rod and the oil pumping pipe are not damaged, and the early warning effect is achieved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is: a structure diagram of a barrel type full protector in a sucker rod full protector;
fig. 2 is: a sectional view of a cylinder type full protector and an oil pumping pipe in the sucker rod full protector;
fig. 3 is: a structure diagram of an eye-type full protector in a sucker rod full protector;
fig. 4 is: a cross-sectional view of an eye-type full protector and an oil pumping pipe in the sucker rod full protector;
fig. 5 is: a structure diagram of a fan-shaped full protector in a sucker rod full protector;
fig. 6 is: a cross-sectional view of the upper sub-sector full protector of the sector full protector in the sucker rod full protector;
fig. 7 is: a cross-sectional view of the lower sub-sector full protector of the sector full protector in the sucker rod full protector;
1, a full protector; 2. a sucker rod; 3. an oil pumping pipe; 4. an early warning structure; 5. a limit hoop; 11. an outer ring; 12. an inner ring; 13. a connection structure; 21. a sucker rod body; 22. and (5) coupling.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In the description of the present invention, it should be understood that the terms "center", "side", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in fig. 1 are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 7, the invention provides a sucker rod full protector, which comprises a full protector body 1 and an early warning structure 4, wherein the full protector body 1 is sleeved outside a sucker rod 2, an oil suction pipe 3 is sleeved on the periphery of the full protector body 1, and the full protector body 1 is provided with the early warning structure 4; the axes of the full protector body 1 and the sucker rod 2 are coincident, and the vertical distance between the early warning structure 4 and the shortest position of the axes is not smaller than the vertical distance between the widest position of the sucker rod 2 and the axes; when the whole protector body 1 and the oil pumping pipe 3 are eccentrically worn and the oil pumping pipe is worn to the early warning structure 4, the early warning structure 4 and the whole protector body 1 can be separated to cause the abnormality of the oil pumping system so as to play a role in early warning.
The full protector body 1 is sleeved outside the sucker rod 2 and sleeved in the sucker tube 1, so that the full protector body 1 and the sucker tube 3 are subjected to eccentric wear, the axes of the full protector body 1 and the sucker rod 2 are overlapped, the vertical distance between the shortest position of the early warning structure 4 and the axis is not smaller than the vertical distance between the shortest position of the sucker rod 2 and the axis, the early warning structure 4 is always worn to the sucker tube 3 before the sucker rod 2, and when the full protector body 1 and the sucker tube 3 are subjected to eccentric wear and are worn to the early warning structure 4, the early warning structure 4 and the full protector body 1 can be separated to cause the abnormal sucker system to play a role in early warning, so that a user can find a problem under the condition that the sucker rod 2 and the sucker tube 3 are not damaged, and the early warning effect is achieved.
As an alternative embodiment, the sucker rod 2 comprises a sucker rod body 21 and a coupling 22 arranged at one end of the sucker rod body 21, a sucker rod joint is arranged in the coupling 22, and the vertical distance between the shortest position of the early warning structure 4 and the axis is not smaller than the vertical distance between the widest position of the coupling 22 and the axis.
The coupling 22 is an important component for connecting two adjacent sucker rod bodies 21, and meanwhile, the coupling 22 is the widest part of the sucker rods 2, so that the vertical distance between the shortest part of the early warning structure 4 and the axis is not smaller than the vertical distance between the widest part of the coupling 22 and the axis, and the full protector body 1 can be firstly ground to the early warning structure 4 before being ground to the coupling 22 so as to protect the sucker rods 2 from abrasion.
As an alternative embodiment, the full protector body 1 comprises an outer ring 11, an inner ring 12 and a connecting structure 13, wherein the early warning structure 4 is arranged on the inner side wall of the outer ring 11, the inner ring 12 is sleeved on the oil pumping rod body 21, the outer ring 11 is sleeved outside the inner ring 12 and fixedly connected with the inner ring 12 through the connecting structure 13, and when the outer ring 11 and the oil pumping pipe 3 are eccentrically worn and are worn to the early warning structure 4, the early warning structure 4 and the outer ring 11 are separated to cause the abnormality of the oil pumping system so as to play a role in early warning.
The inner ring 12 is sleeved at the widest part of the full protector body 1, the outer ring 11 is used as the widest part of the full protector body 1, the earliest part is relieved with the oil pumping pipe 3 and eccentric wear occurs, and the early warning structure 4 is arranged on the outer ring 11, so that when the outer ring 11 is worn down, the early warning structure is separated from the full protector body 1 and falls off due to no structure connected with the outer ring 11, and the oil pumping system is caused to be abnormal so as to play the early warning role.
As an alternative implementation manner, the early warning structure 4 is an early warning groove formed inside the inner side wall of the outer ring 11 or an early warning strip fixed outside the inner side wall of the outer ring 11, and when the outer ring 11 and the oil pumping pipe 3 are in eccentric wear and the early warning groove or the early warning strip is worn, the early warning groove or the early warning strip is separated from the outer ring 11 to cause the abnormality of the oil pumping system so as to play a role in early warning.
The early warning groove is processed on the inner side wall of the outer ring 11 of the full protector body 1, or the early warning strip is processed outside the inner side wall of the outer ring 11, when the outer ring 11 and the oil pumping pipe 3 are in eccentric wear, the full protector sheet can be broken in a strip shape along the early warning groove under the action of lateral force, and finally falls to the vicinity of the valve ball, and the full protector sheet obliquely slides between the valve ball and the valve seat, so that the valve ball cannot return to a normal state, the liquid yield is reduced, the valve ball is transmitted to a display screen through a display system, a user can know that the system is abnormal according to the situation, measures are timely taken, and an early warning effect is achieved.
As an alternative embodiment, the sucker rod 2 is provided with concave marks, the full protector body 1 is provided with convex marks corresponding to the concave marks, the number of the concave marks and the convex marks is four, and the circumference of the full protector body 1 is marked with one group of convex marks at intervals of 90 degrees.
Therefore, at least one group of marks can be reserved after the full protector body 1 is used in an oil well in a biased manner, so that the full protector body 1 has the functions of identification and measurement, unique codes are marked on each group of full protector bodies 1 and sucker rods 2 which are put into the well, each group of codes represents the depth of the full protector bodies 1 and sucker rods 2 in the well during well completion, the positions of the cleaned full protector bodies 1 and sucker rods 2 and other abnormal conditions can be accurately and clearly found, and meanwhile, the abrasion volume of unit time is calculated according to the abrasion degree (corresponding abrasion volume is arranged for each abrasion of the full protector bodies 1) and the abrasion time of the full protector bodies 1, so that a reliable basis is provided for accurate lower design.
Meanwhile, according to the abrasion volume of the corresponding well depth under-well full protector body 1 in unit time obtained by the identification and metering functions of the full protector body 1, the expected pump detection period is multiplied, the required total abrasion volume can be calculated, and therefore the purpose of accurately controlling the pump detection period is achieved.
Sometimes, an empty sucker rod is put into an oil well, namely, the sucker rod of the full protector is not sleeved, the empty sucker rod is sleeved with a limit hoop 5, and a convex mark corresponding to the concave mark position on the sucker rod 2 is also arranged on the limit hoop 5, so that the codes of all sucker rod groups are complete.
As an alternative embodiment, the sum of the sectional areas of the outer ring 11, the inner ring 12, the connecting structure 13 and the sucker rod body 21 is less than or equal to the sectional area of the coupling.
Because the sectional area formed by the outer ring 11, the inner ring 12, the connecting structure 13 and the sucker rod body 21 is smaller than or equal to the sectional area of the sucker rod coupling of the same level, the sucker rod 2 does not increase the movement resistance even if the full protector body 1 is installed in the up-down movement process, the eccentric wear position does not move, and the sucker rod is not broken near the full protector.
As an alternative implementation mode, the sucker rod full protector is an eye type full protector, the outer ring 11 is an elliptical ring, the inner ring 12 is two arc plates, the connecting structure 13 is a rib plate, the elliptical ring is fixedly connected with the arc plates through the rib plate in the short axis direction, the major axis outer diameter of the elliptical outer ring is 62mm, and the arc plates are sleeved on the sucker rod body 21 and leave gaps so that the eye type full protector and the sucker rod body 21 can rotate relatively along the axial direction of the sucker rod body 21.
The working principle of the eye-type full protector is that in the production process of a well, the sucker rod 2 and the sucker tube 3 are eccentrically worn, one side of the sucker rod 2 is tightly attached to the inner wall of the sucker tube 3, and as the eye-type full protector can flexibly rotate, the largest arc surface of the eye-type full protector is tightly attached to the sucker tube 3 to be eccentrically worn, the largest arc surface of the eye-type full protector is an arc surface with phi 62mm, the contact arc surface is completely attached to the inner wall of the sucker tube 3, the actual contact area is increased, the stress per unit area is reduced, damage to a passivation layer is prevented, and the eye-type full protector is more suitable for an oil well with serious corrosion.
As an alternative embodiment, both end surfaces of the eye-type full protector are provided in a bell mouth shape, and both upper and lower end surfaces of the eye-type full protector are provided with a limit clip 5 to limit the movement of the eye-type full protector on the sucker rod body 21 in the axial direction.
The limit bands 5 prevent the full protector body 1 from moving up and down by a large distance, and the eccentric wear position is abnormal.
As an alternative implementation mode, the sucker rod full protector is a cylindrical full protector, and is provided with an outer ring 11 and an inner ring 12, wherein the outer ring 11 and the inner ring 12 are circular rings, a connecting structure 13 is a supporting rib plate, the inner ring 12 is connected with four rib plates, the included angle between the rib plates is 90 degrees, the other end of the rib plate is connected with the outer ring 11, the length of the full protector body 1 is 300-500 mm, the outer diameter is 46-56 mm, the wall thickness is 4-7 mm, and the thickness of the rib plate is 3-5 mm.
The cylinder type full protector is designed specially for a pumping well with serious eccentric wear, and has the early warning function and larger wear volume.
As an alternative embodiment, the tubular full protector is further provided with a nipple, the inner ring 12 of the tubular full protector is fixedly connected to the nipple, and the nipple can be connected with the sucker rod 2.
The nipple is suitable for an oil well with a certain well section with serious eccentric wear, when the eccentric wear of a certain section of the oil well is abnormally serious, the number of the full protector bodies 1 needs to be increased, the sucker rod 2 of the well section cannot be increased, and the sucker rod 2 is not convenient and high in cost to replace frequently, so that the nipple provided with the barrel-type full protector can be connected to the well section.
As an alternative implementation mode, the upper end and the lower end of the cylindrical full protector are provided with transition belts, and the upper end face and the lower end face of the cylindrical full protector are both arranged in a horn mouth shape.
Horn mouths at the upper end and the lower end of the cylindrical full protector move up and down along the pipe wall in a scraping manner, so that sand in fluid passes through the cylindrical full protector body, and solid-phase particles are not arranged between the cylindrical full protector and the pipe wall, thereby avoiding the aggravation of abrasion loss.
As an alternative implementation mode, the sucker rod full protector is a fan-shaped full protector, the fan-shaped full protector is axially divided into two coaxial sub-fan-shaped full protectors, namely an upper sub-fan-shaped full protector and a lower sub-fan-shaped full protector, the outer ring 11 is two coaxial lines and faces against the arc-shaped plates, the central angle of the arc-shaped plates is 90 degrees, the inner ring 12 is a circular ring, the connecting structure 13 is four rib plates, the ends of the two arc-shaped plates are fixedly connected on the circular ring through the four rib plates to form a fan-shaped plate group, each sub-fan-shaped full protector comprises one fan-shaped plate group, the two fan-shaped plate groups are coaxially arranged in a staggered mode by 90 degrees, the diameter of the arc-shaped plates is 46mm-59mm, the wall thickness of the arc-shaped plates is 3-7mm, and the thickness H of the rib plates is 3mm-7mm.
The fan-shaped full protector is designed specially for the oil pumping pipe 3 which cannot clean the wax on the inner wall, has the basic functions of the full protector, and can effectively clean the wax on the inner wall of the oil pumping pipe 3, and has large diameter and large locking force.
The working principle of the fan-shaped full protector is as follows: when the oil pumping pipe is in a well, two symmetrical lower halves scrape off 1/4 of the wax attached to the inner wall of the oil pumping pipe 3, the upper halves scrape off the wax which forms an angle of 90 degrees with the lower halves, the scraped excessive wax enters the middle of the two halves, and the dead wax attached to the pipe wall of the oil pumping pipe 3 is changed into the survival wax, so that the effect of ploughing the wax is achieved, and the dead wax is prevented from being stuck to other full protectors in the well; the wax deposited on the wall of the oil pumping pipe 3 is scraped at any time when the full protector moves up and down, and meanwhile, the wax deposited on the oil pumping pipe 3 is squeezed out and is flushed by liquid flow to carry the oil outlet pipe, so that the flow channel is cleaned in time, and the overflow area is kept constant.
As an alternative implementation mode, the upper end and the lower end of the fan-shaped full protector are provided with transition belts, and the upper end face and the lower end face of the fan-shaped full protector are both arranged in a horn mouth shape.
Horn mouths at the upper end and the lower end of the fan-shaped full protector move up and down along the pipe wall in a scraping manner, so that sand in the fluid passes through the fan-shaped full protector body, and solid-phase particles are not arranged between the fan-shaped full protector and the pipe wall, thereby avoiding the aggravation of abrasion loss.
As an alternative embodiment, the transition zone length is selected to be 30-150mm.
The end face of the full protector is aligned with the round end face of the same-level sucker rod, and lateral force is applied from far to near equidistance to the rod body to be contacted with the horizontal reference surface, so that the distance required by the rod body of the full protector to reach the reference surface is longer than the distance required by the round sucker rod, which means that the lateral force required by the sucker rod body 21 of the full protector body 1 is greater than the lateral force required by the rod body extended by the round sucker rod. The transition section of the full protector body 1 does not increase the rod breaking probability, and the optimal length of the experimental transition belt is 30-150mm.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a sucker rod full protector which characterized in that, including full protector body (1) and early warning structure (4), wherein:
the full protector body (1) is sleeved outside the sucker rod (2), the sucker tube (3) is sleeved on the periphery of the full protector body (1), and the early warning structure (4) is arranged on the full protector body (1);
the axes of the full protector body (1) and the sucker rod (2) are coincident, and the vertical distance between the shortest position of the early warning structure (4) and the axis is not smaller than the vertical distance between the widest position of the sucker rod (2) and the axis;
when the full protector body (1) and the oil pumping pipe (3) are eccentrically worn and the oil pumping pipe is worn to the early warning structure (4), the early warning structure (4) and the full protector body (1) can be separated to cause the abnormality of an oil pumping system so as to play a role in early warning;
the sucker rod (2) comprises a sucker rod body (21) and a coupling (22) arranged at one end of the sucker rod body (21), and the vertical distance between the shortest position of the early warning structure (4) and the axis is not smaller than the vertical distance between the widest position of the coupling (22) and the axis;
the full protector body (1) comprises an outer ring (11), an inner ring (12) and a connecting structure (13), wherein the early warning structure (4) is arranged on the inner side wall of the outer ring (11), the inner ring (12) is sleeved on the oil pumping rod body (21), the outer ring (11) is sleeved outside the inner ring (12) and fixedly connected with the inner ring (12) through the connecting structure (13), and when the outer ring (11) and the oil pumping pipe (3) are eccentrically worn and are worn to the early warning structure (4), the early warning structure (4) and the outer ring (11) are separated to cause the abnormality of the oil pumping system so as to play a role in early warning;
the early warning structure (4) is an early warning groove formed in the inner side wall of the outer ring (11) or an early warning strip fixed outside the inner side wall of the outer ring (11), the outer ring (11) and the oil pumping pipe (3) are eccentrically worn, and when the early warning groove or the early warning strip is worn, the early warning groove or the early warning strip is separated from the outer ring (11) to cause the abnormality of the oil pumping system so as to play a role in early warning;
the oil pumping rod (2) is provided with concave marks, the full protector body (1) is provided with convex marks corresponding to the concave marks in position, the number of the concave marks and the number of the convex marks are four, and a group of the convex marks are marked every 90 degrees on the circumference of the full protector body (1).
2. The sucker rod full protector according to claim 1, characterized in that the sucker rod full protector is an eye type full protector, the outer ring (11) is an elliptical ring, the inner ring (12) is two arc plates, the connecting structure (13) is a rib plate, the elliptical ring is fixedly connected with the arc plates through the rib plate in the short axis direction, and the arc plates are sleeved on the sucker rod body (21) and provided with gaps so that the eye type full protector and the sucker rod body (21) can rotate relatively along the axial direction of the sucker rod body (21).
3. The sucker rod full protector according to claim 2, characterized in that both end surfaces of the eye-type full protector are provided in a horn mouth shape, and both upper and lower end surfaces of the eye-type full protector are provided with spacing clips (5) to restrict the eye-type full protector from moving axially on the sucker rod body (21).
4. The sucker rod full protector according to claim 1, wherein the sucker rod full protector is a cylindrical full protector, the outer ring (11) and the inner ring (12) are circular rings, the connecting structure (13) is a supporting rib plate, one end of the supporting rib plate is fixedly connected with the circular ring surface of the inner ring (12), and the other end of the supporting rib plate is fixedly connected with the circular ring inner wall of the outer ring (11).
5. The sucker rod full protector according to claim 1, wherein the sucker rod full protector is a fan-shaped full protector, the fan-shaped full protector is axially divided into two coaxial sub-fan-shaped full protectors, the outer ring (11) is two arc plates, the inner ring (12) is a circular ring, the connecting structure (13) is four rib plates, the ends of the two arc plates are fixedly connected to the circular ring through the four rib plates to form a fan-shaped plate group, and each sub-fan-shaped full protector comprises one fan-shaped plate group, and the two fan-shaped plate groups are coaxial and are arranged in a staggered manner by 90 degrees.
6. The sucker rod full protector according to claim 4 or 5, wherein the upper end and the lower end of the sucker rod full protector are provided with transition belts, and the upper end and the lower end of the sucker rod full protector are both provided with a horn mouth shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810632411.0A CN108643848B (en) | 2018-06-19 | 2018-06-19 | Sucker rod full protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810632411.0A CN108643848B (en) | 2018-06-19 | 2018-06-19 | Sucker rod full protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108643848A CN108643848A (en) | 2018-10-12 |
| CN108643848B true CN108643848B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810632411.0A Active CN108643848B (en) | 2018-06-19 | 2018-06-19 | Sucker rod full protector |
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| CN202731777U (en) * | 2012-09-04 | 2013-02-13 | 陈建军 | Ring type sucker rod centralizer |
| CN204002623U (en) * | 2014-08-21 | 2014-12-10 | 陈士荣 | A kind of preventing sucker rod from slanting-wear and de-waxing apparatus |
| CN205558831U (en) * | 2016-04-27 | 2016-09-07 | 陕西鼎和源瑞环境工程有限公司 | Two -way protection eccentric wear prevention device of pipe pole |
| AU2016277644A1 (en) * | 2015-12-29 | 2017-07-13 | Cobalt Extreme Pty Ltd | Advance Failure Warning Apparatus And System For Downhole Gear |
| CN208347712U (en) * | 2018-06-19 | 2019-01-08 | 天津市益彰石油科技发展有限公司 | Full protector for sucker rod |
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2018
- 2018-06-19 CN CN201810632411.0A patent/CN108643848B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4146060A (en) * | 1977-07-25 | 1979-03-27 | Smith International, Inc. | Drill pipe wear belt assembly |
| CN201874486U (en) * | 2010-06-17 | 2011-06-22 | 中国石油大港油田第五采油厂 | Anti-wearing device for sucker rod |
| CN202731777U (en) * | 2012-09-04 | 2013-02-13 | 陈建军 | Ring type sucker rod centralizer |
| CN204002623U (en) * | 2014-08-21 | 2014-12-10 | 陈士荣 | A kind of preventing sucker rod from slanting-wear and de-waxing apparatus |
| AU2016277644A1 (en) * | 2015-12-29 | 2017-07-13 | Cobalt Extreme Pty Ltd | Advance Failure Warning Apparatus And System For Downhole Gear |
| CN205558831U (en) * | 2016-04-27 | 2016-09-07 | 陕西鼎和源瑞环境工程有限公司 | Two -way protection eccentric wear prevention device of pipe pole |
| CN208347712U (en) * | 2018-06-19 | 2019-01-08 | 天津市益彰石油科技发展有限公司 | Full protector for sucker rod |
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| Publication number | Publication date |
|---|---|
| CN108643848A (en) | 2018-10-12 |
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