CN113236150B

CN113236150B - Centralizer for hydraulic oil pipe

Info

Publication number: CN113236150B
Application number: CN202110781626.0A
Authority: CN
Inventors: 陈银萍
Original assignee: Dongying Shenglan Petroleum Technology Development Co ltd
Current assignee: Dongying Shenglan Petroleum Technology Development Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-09-03
Anticipated expiration: 2041-07-12
Also published as: CN113236150A

Abstract

The invention provides a centralizer for a hydraulic oil pipe, and relates to the technical field of centralizers for oil development in oil fields. This hydraulic oil pipe is with centralizer is including taking a seat, it has the pipe to take a seat in to run through, the top of pipe transversely runs through there are two first through-holes, be equipped with the stopper that is located the pipe outside in the first through-hole, still transversely run through there are two second through-holes on the pipe, the mechanism that the pipeline section was right to the adoption on the well is the cover pressure formula of simple structure and presss from both sides tight structure, adopt the mode of linkage, the mechanism action upwards compresses tightly the joint of two parts oil pipe from the bottom in the cooperation well when making the mechanism of righting in the pit move, prevent that the joint is not hard up and the oil seepage phenomenon appears, and adopt this link gear, make this device can stabilize oil pipe. The invention also has the function of detecting the oil leakage phenomenon of the joint, and ensures that the first time is rush-repair during oil leakage so as to ensure the smooth operation of oil pumping.

Description

Centralizer for hydraulic oil pipe

Technical Field

The invention relates to the technical field of centralizers for oil field petroleum development, in particular to a centralizer for a hydraulic oil pipe.

Background

In horizontal wells and highly deviated wells, the oil pipe is usually deviated to the lower wall of the well due to the gravity problem, so that the centering degree of the oil pipe is poor. In order to center the oil pipe, chinese patent publication No. CN210714512U discloses a hydraulic oil pipe centralizer, also belonging to the field of oil development, the hydraulic oil pipe centralizer comprising: the centralizer comprises a centralizer body, a driving mechanism, a centralizing spring plate mechanism and a plurality of replaceable limiting rings, wherein the driving mechanism is arranged at one end of the centralizer body in a sliding mode along the axial direction of the centralizer body, the centralizing spring plate mechanism is sleeved on the centralizer body and is integrally of a straight tube-shaped structure, and when the centralizer is actually used, the centralizer body is integrally conveyed into a well along with an oil pipe. Thus, the part of the oil pipe extending upwards from the well head cannot be straightened.

Disclosure of Invention

The invention aims to provide a centralizer for a hydraulic oil pipe, which can centralize the oil pipe and ensure the smooth operation of oil pumping.

The invention has the technical scheme that the centralizer for the hydraulic oil pipe comprises a seat, a guide pipe penetrates through the seat, two first through holes transversely penetrate through the top of the guide pipe and are respectively arranged on the front side and the rear side of the guide pipe, a limiting block extending to the outer side of the guide pipe is inserted into each first through hole, a pressing seat is screwed at the top end of the guide pipe through threads, the pressing seat is used for enabling the two limiting blocks to enter the guide pipe when rotating downwards so as to respectively clamp the front side and the rear side of the oil pipe, two second through holes transversely penetrate through the guide pipe and are respectively positioned below the two first through holes, a swinging part is movably connected in the second through hole on the front side through a rotating shaft, the swinging part comprises a detection plate at the front end and a swinging ring at the rear end, the swinging ring is positioned in the guide pipe and penetrates out of the second through hole on the front side, a rear top surface of the swinging ring is movably connected with a rear top ring, the second through hole of the adjacent rear side of back apical ring, the middle part of back apical ring is connected with the first stay cord of upwards wearing out by rear side second through hole, the top of first stay cord is connected in the stopper bottom that corresponds and can be followed the stopper and removed, the stopper moves along first through hole and still is used for upwards deflecting the rear side in order to press from both sides tight oil pipe through first stay cord pulling back apical ring in order to press from both sides tight oil pipe, and make the bottom surface of pick-up plate downward sloping rotatory to the pick-up plate support the bottom side in the second through hole simultaneously, in order to utilize the oil liquid outflow of pick-up plate guide hourglass, thereby carry out the detection operation.

In one of the embodiment, the bottom of taking a seat is equipped with the chamber of accomodating that is located the pipe periphery, the bottom of pipe is equipped with the bellows unanimous with its lumen aperture, it is equipped with the round lifting rope to accomodate the intracavity around the pipe periphery, the length of round lifting rope equals, the bottom of lifting rope is connected with annular counter weight seat, the round hole has been seted up at annular counter weight seat middle part, still there is the preceding apical ring that corresponds to back apical ring through changeing board swing joint in the second through-hole of front side, the high position after preceding apical ring upwards deflects is unanimous with the high position after the back apical ring upwards deflects, the top surface of annular counter weight seat is equipped with the second stay cord that upwards extends, the second stay cord runs through in the pipe and connects in preceding apical ring the inner.

In one embodiment, the aperture size of the round hole is smaller than the outer diameter size of the corrugated pipe, the annular counterweight seat can be sleeved outside the oil pipe through the round hole when moving downwards, and the annular counterweight seat can push the corrugated pipe to be compressed towards the direction of the containing cavity through the top surface when moving upwards.

In one embodiment, the annular counterweight seat is a hollow annular water cavity, a liquid level sensor is arranged on the wall of the inner cavity of the annular counterweight seat, a charging hole is formed in the annular counterweight seat, and the top of the annular counterweight seat is connected with the charging and discharging hole through a flexible pipe.

In one embodiment, the detection plate is provided with a collection cavity, the front end of the detection plate is penetrated with a liquid pipe communicated with the collection cavity, a liquid sensor with an upward sensing probe is inserted in the liquid pipe, and the top surface of the seat is provided with an alarm device electrically connected with the liquid sensor.

In one embodiment, the seat member is provided with a row of holes corresponding to the lower side of the liquid pipe.

In one embodiment, the two sides of the swing part are respectively provided with a first torsion spring sleeved on the rotating shaft, the first torsion springs are used for enabling the swing part to rotate and reset, and the rotating shaft of the rear top ring and the rotating shaft of the front top ring are respectively provided with a second torsion spring enabling the rear top ring/the front top ring to rotate and reset.

Compared with the prior art, the oil pipe detection device has the advantages that the two limiting blocks can right the upper section of the oil pipe, the limiting blocks move along the first through hole to clamp the oil pipe, meanwhile, the limiting blocks are used for pulling the rear top ring to deflect upwards through the first pull rope to clamp the rear side of the oil pipe, meanwhile, the detection plate is enabled to rotate downwards until the bottom surface of the detection plate abuts against the bottom side of the second through hole, the detection plate is used for guiding leaked oil to flow out, detection operation is carried out, and therefore detection convenience is improved.

Drawings

Fig. 1 is a schematic structural view of a centralizer for a hydraulic oil pipe according to the present invention after being used and stored;

FIG. 2 is a schematic structural view of the annular weight seat moving downward and the pressing seat moving upward in the present invention;

FIG. 3 is a schematic view of the internal structure of FIG. 2, taken along the line;

FIG. 4 is an enlarged view of part A of FIG. 3, showing the mounting positions of the first torsion spring and the second torsion spring;

FIG. 5 is a schematic diagram of the present invention in use (where G represents tubing placed in a well after butt-jointing with joints and J represents joints joining the tubing together);

FIG. 6 is an enlarged view of the portion B of the present invention, which is drawn from FIG. 5;

FIG. 7 is a schematic view of the structure shown in FIG. 5 from another perspective;

FIG. 8 is a schematic view of an oil pipe G being stabilized by the present apparatus.

In the figure: 1. seating; 101. a receiving cavity; 102. arranging holes; 2. a conduit; 21. a first through hole; 22. a limiting block; 23. a second through hole; 24. a bellows; 3. pressing a base; 4. a decoration piece; 41. a swinging ring; 42. detecting a plate; 43. a liquid pipe; 44. a rear top ring; 5. a first pull cord; 7. a lifting rope; 8. an annular counterweight seat; 81. a circular hole; 82. a charging hole; 83. a small hydraulic pump; 9. a front top ring; 10. a second pull cord; 11. a liquid sensor; 12. an alarm device; 13. a first torsion spring; 14. a second torsion spring.

Detailed Description

The technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be specifically understood by those skilled in the art.

As shown in fig. 1 to 8, the present embodiment provides a centralizer for a hydraulic oil pipe, which includes a seat 1, a guide pipe 2 penetrating through the seat 1, two first through holes 21 penetrating through a top of the guide pipe 2 in a horizontal direction, the two first through holes 21 being respectively disposed at front and rear sides of the guide pipe 2, a stopper 22 being inserted into each first through hole 21, and one end of the stopper 22 extending to an outer side of the guide pipe 2. For example, the outer end of the limiting block 22 is provided with a wedge face end, the wedge face end is located on the outer side of the guide pipe 2, the top end of the guide pipe 2 is screwed with the pressing seat 3 through threads, the pressing seat 3 is contacted with the wedge face end when rotating downwards, so that the inner end of the limiting block 22 enters the guide pipe 2, the limiting block 22 is enabled to clamp a pipe joint in the guide pipe 2, and therefore, an oil pipe entering an oil well from the guide pipe 2 cannot be bent in a long distance of the top area of the oil pipe, and oil pumping displacement cannot be influenced due to bending of the oil pipe. Still transversely run through on pipe 2 and have two second through-holes 23, two second through-holes 23 set up respectively in pipe 2's front and back both sides, two second through-holes 23 are located two first through-holes 21 below respectively, there is goods of furniture for display rather than for use 4 through pivot swing joint in the second through-hole 23 of front side, goods of furniture for display rather than for use 4 is including the pick-up plate 42 that is in the front end and the swing ring 41 that is in the rear end, swing ring 41 is located pipe 2 and locates the oil pipe outside through annular inner hole cover when in actual use, pick-up plate 42 is worn out outwards by the second through-hole 23 of front side, the top surface swing joint of swing ring 41 has back knock-out ring 44, back knock-out ring 44 is adjacent to the second through-hole 23 of rear side, the middle part of back knock-out ring 44 is connected with the first stay cord 5 that upwards wears out by the second through-hole 23 of rear side, the top of first stay cord 5 is connected in the outside of corresponding stopper 22 and can be along with stopper 22 synchronous motion, stopper 22 still drives back knock-out ring 44 upwards through first stay cord 5 in order to pressing from both sides in tight in pipe 2 along first through-hole 21 entering pipe 2 The oil pipe joint is deflected to utilize the rear top ring 44 to limit the rear side area of the oil pipe joint, and meanwhile, when the rear top ring 44 deflects upwards, the swing ring 41 drives the detection plate 42 to rotate obliquely until the bottom of the detection plate 42 abuts against the bottom side of the second through hole 23, so that when oil leaks from the joint part of the oil pipe, the oil can flow onto the swing ring 41 along the wall of the oil pipe and then flows onto the detection plate 42 through the swing ring 41, and therefore, when oil pumping is carried out, the use state of the joint part of the oil pipe can be detected in real time. In the prior art, the oil pipe at the part above the well is more critical and is directly connected with the oil pumping equipment above the well, the pressure of the pipe cavity is higher because the pipe cavity is closer to the oil pumping equipment, and if the oil pipe at the part above the well is bent, the oil pipe can be cracked. The technical scheme can be used for righting the oil pipe, so that the bulging crack is avoided.

As will be described in further detail herein with respect to the specific structure of the swing member 4, the swing member 4 is essentially a swing member assembly, which includes a swing ring 41 with a rear end located in the conduit 2 and a detection plate 42 with a front end extending out of the second through hole 23, i.e., the swing ring 41 and the detection plate 42 are two-part structures located at the rear end and the front end of the swing member 4, respectively. For example, in one embodiment, the inner diameter of the wobble ring 41 may be slightly larger than the outer diameter of the tubing. The rear top ring 44 is a structure on the swing ring 41, the liquid pipe 43 is a structure on the detection plate 42, and specific structures of the swing ring 41, the detection plate 42, the liquid pipe 43 and the rear top ring 44 are shown in fig. 3 and 4.

In one embodiment, the bottom of the seat 1 is provided with a receiving cavity 101 located at the periphery of the conduit 2, the bottom end of the conduit 2 is provided with a corrugated pipe 24 with the same diameter as the pipe cavity, a circle of lifting rope 7 is arranged around the periphery of the conduit 2 in the receiving cavity 101, the length of the circle of lifting rope 7 is equal, the bottom end of the lifting rope 7 is connected with an annular counterweight seat 8 which can be received in the receiving cavity 101 when moving upwards, the middle part of the annular counterweight seat 8 is provided with a round hole 81 which is used for sleeving the outer side of the bottom of an oil pipe, when the bottom of the oil pipe is conveyed into an oil well, the round hole 81 is used for guiding the oil pipe, a front top ring 9 corresponding to a rear top ring 44 is movably connected in the second through hole 23 at the front side through a rotating plate, the height position of the front top ring 9 after deflecting upwards is consistent with the height position of the rear top ring 44 after deflecting upwards, the top surface of the annular counterweight seat 8 is provided with a second pull rope 10 extending upwards, the second pull rope 10 penetrates through the conduit 2 and is connected to the inner end of the front top ring 9 (for example connected to the rotating plate), the second stay cord 10 can drive preceding apical ring 9 upwards to deflect when pulling downwards, and then makes preceding apical ring 9 upwards press from both sides the front side of tight pipe connector in 2, and under the mating reaction of back apical ring 44 and preceding apical ring 9, can prevent to connect not hard up and the oil impregnate phenomenon appears.

In an embodiment, the aperture size of the circular hole 81 is smaller than the outer diameter size of the corrugated pipe 24, so that after the device is used, the annular weight seat 8 is upwards accommodated in the accommodating cavity 101, and the corrugated pipe 24 is upwards pushed into the accommodating cavity 101 by using the circular hole 81 with the small aperture size, so that not only the annular weight seat 8 can be accommodated after the device is used, but also the corrugated pipe 24 is compressed and accommodated when the annular weight seat 8 is accommodated, so that after the device is used, the annular weight seat 8 and the seat 1 can be used as a bottom placing part of the device, and the device is convenient to accommodate and place.

In one embodiment, the annular weight seat 8 is a hollow annular water cavity, and the top of the annular weight seat 8 is provided with a charging hole 82. The small hydraulic pump 83 is arranged on the charging hole 82, when the small hydraulic pump 83 is in practical use, the small hydraulic pump 83 is connected to an oil pipe extending into an oil well through a flexible pipe and forms a hydraulic oil supply loop with the oil pipe, if the partial section of the oil pipe in the oil well has an obvious bending phenomenon, the small hydraulic pump 83 is controlled in a remote mode to be electrified to work, oil is injected into the annular counterweight seat 8 through the flexible pipe connected to the oil pipe, the weight is increased, the underground pipe section of the oil pipe penetrating through the round hole 81 in the middle of the annular counterweight seat 8 is forcibly straightened by the self-gravity formed by the falling of the annular counterweight seat 8, and the small hydraulic pump 83 is controlled by a liquid level sensor in the annular counterweight seat 8 after the annular counterweight seat 8 is filled with oil, so that oil supply can be automatically stopped. Of course, the seat 1 is transparent, and a lamp may be provided on the seat 1 to see whether the downhole pipe is bent. In conclusion, the device can centralize the top section of the oil pipe and the bottom section of the oil pipe so as to ensure that the oil pumping oil flows more smoothly.

In an embodiment, the top of detection plate 42 has the collection chamber, there is the heavy chamber in the collection chamber, the communicating liquid pipe 43 rather than the collection chamber runs through at the front end of detection plate 42, inductive probe 11 up is put to liquid pipe 43 interpolation, the top surface of taking a seat 1 is equipped with alarm device 12 with liquid sensor 11 electric connection, the fluid that leaks from the oil pipe not only can drop on detection plate 42 so that constructor naked eye watches, but also can be through liquid sensor 11 with fluid signal transmission in alarm device 12, alarm function through alarm device 12 in reports to the police and reminds, the warning can be infrared ray warning, also can be buzzer horn. The seat member 1 is provided with a discharge hole 102 corresponding to the lower portion of the liquid pipe 43 for allowing the oil liquid entering the liquid pipe 43 to flow out. Because the warning effect is good, therefore fluid can not leak too much and will be known by the maintainer, therefore the fluid of discharging by the row of holes 102 is very limited, can not be extravagant, that is to say, back apical ring 44 and preceding apical ring 9 extrude can prevent on the oil pipe connector that it from producing the oil seepage phenomenon because of becoming flexible when pumping, and this detection function also can detect when the oil seepage phenomenon appears in case in the joint, reaches the purpose of dual fail-safe.

In an embodiment, the two sides of the swing part 4 are provided with first torsion springs 13 sleeved on the rotating shafts, the first torsion springs 13 are used for enabling the swing part 4 to rotate and reset, the rotating shafts of the rear top ring 44 and the front top ring 9 are provided with second torsion springs 14 enabling the rear top ring and the front top ring to rotate and reset, after the swing part swing device is used, only the pressing base 3 needs to rotate and rise, the two limiting blocks 22 losing the squeezing effect can automatically move out a part of the guide pipe 2, at the moment, the limiting blocks 22 do not clamp the oil pipe, and the oil pipe can be pulled out upwards from the guide pipe 2. Meanwhile, due to the return of the limiting block 22, under the action of the first torsion spring 13, the rear top ring 44 moves downwards, the swing ring 41 rotates downwards, the detection plate 42 at the outer end of the swing ring rotates upwards, and the swing ring 41 returns to a position where the inner hole of the swing ring is on the same axis with the guide pipe 2, namely, a coaxial position. When the oil pipe is used again, the oil pipe can be inserted into the well again through the guide pipe 2, and it should be supplemented again here that the return of the limiting block 22 is elastic return, and return devices connected with the first through hole 21, or springs, or elastic steel wires and the like are arranged on both sides of the limiting block.

In the invention, the mechanism adopted for righting the aboveground pipe section is a sleeve pressing type clamping structure with a simple structure, and a linkage mode is adopted, so that the underground righting mechanism is matched with the action of the aboveground mechanism to press the joints of the two parts of oil pipes from the bottom upwards when acting, the phenomenon of oil leakage caused by loosening of the joints is prevented, and the device can stabilize the oil pipes by adopting the linkage mechanism. The invention also has the function of detecting the oil leakage phenomenon of the joint, and ensures that the first-time rush repair can be carried out during oil leakage so as to ensure the smooth operation of oil pumping.

The above-described embodiments further explain the object, technical means, and advantageous effects of the present invention in detail. It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.

Claims

1. The utility model provides a centralizer for hydraulic oil pipe, includes and takes a seat (1), takes a seat and has run through pipe (2) in (1), its characterized in that: the top of the guide pipe (2) is transversely provided with two first through holes (21) in a penetrating manner, the two first through holes (21) are respectively arranged at the front side and the rear side of the guide pipe (2), a limiting block (22) extending to the outer side of the guide pipe (2) is inserted into each first through hole (21), the top end of the guide pipe (2) is screwed with a pressing seat (3) through threads, the pressing seat (3) is used for enabling the two limiting blocks (22) to enter the guide pipe (2) when rotating downwards so as to respectively clamp the front side and the rear side of an oil pipe, the guide pipe (2) is also transversely provided with two second through holes (23) in a penetrating manner, the two second through holes (23) are respectively positioned below the two first through holes (21), the second through holes (23) at the front side are movably connected with a swing ring (4) through a rotating shaft, the swing part (4) comprises a detection plate (42) at the front end and a swing ring (41) at the rear end, the detection plate (42) penetrates out of the second through hole (23) on the front side, the top surface of the swing ring (41) is movably connected with a rear top ring (44), the rear top ring (44) is adjacent to the second through hole (23) on the rear side, the middle part of the rear top ring (44) is connected with a first pull rope (5) which penetrates out of the second through hole (23) on the rear side upwards, the top end of the first pull rope (5) is connected to the bottom of the corresponding limiting block (22) and can move along with the limiting block (22), the limiting block (22) moves along the first through hole (21) to clamp the oil pipe and meanwhile is used for pulling the rear top ring (44) to deflect upwards to clamp the rear side of the oil pipe through the first pull rope (5), and simultaneously the detection plate (42) is inclined downwards and rotated until the bottom surface of the detection plate (42) is abutted against the bottom side of the second through hole (23), so as to guide the leaked oil to flow out by the detection plate (42) to perform the detection operation.

2. The centralizer for the hydraulic oil pipe according to claim 1, characterized in that a containing cavity (101) located at the periphery of the guide pipe (2) is arranged at the bottom of the seat (1), a corrugated pipe (24) with the same bore diameter as the pipe cavity of the guide pipe (2) is arranged at the bottom end of the guide pipe (2), a circle of lifting rope (7) is arranged in the containing cavity (101) and surrounds the periphery of the guide pipe (2), the length of the circle of lifting rope (7) is equal, an annular counterweight seat (8) is connected to the bottom end of the lifting rope (7), a round hole (81) is formed in the middle of the annular counterweight seat (8), a front top ring (9) corresponding to the rear top ring (44) is movably connected in a second through hole (23) on the front side through a rotating plate, the height position of the front top ring (9) after upward deflection is consistent with the height position of the rear top ring (44), a second pull rope (10) extending upwards is arranged on the top surface of the annular counterweight seat (8), the second pull rope (10) penetrates through the guide pipe (2) and is connected to the inner end of the front top ring (9).

3. The centralizer for the hydraulic oil pipe according to claim 2, wherein the diameter of the round hole (81) is smaller than the outer diameter of the corrugated pipe (24), the annular counterweight seat (8) can be sleeved outside the oil pipe through the round hole (81) when moving downwards, and the annular counterweight seat (8) can push the corrugated pipe (24) to be compressed towards the direction of the containing cavity (101) through the top surface when moving upwards.

4. The centralizer for the hydraulic oil pipe according to claim 3, wherein the annular counterweight seat (8) is a hollow annular water cavity, a liquid level sensor is arranged on the inner cavity wall of the annular water cavity, the annular counterweight seat (8) is provided with a charging hole (82), and the top of the annular counterweight seat (8) is connected with the charging hole (82) through a flexible pipe.

5. A centralizer for hydraulic oil pipes according to claim 4, characterized in that the detection plate (42) is provided with a collection chamber, the front end of the detection plate (42) is penetrated with a liquid pipe (43) communicated with the collection chamber, the liquid sensor (11) with the sensing probe facing upwards is inserted in the liquid pipe (43), and the top surface of the seat (1) is provided with an alarm device (12) electrically connected with the liquid sensor (11).

6. A centraliser for a hydraulic oil line according to claim 5, characterised in that the seat (1) is provided with a drain hole (102) corresponding to the underside of the liquid line (43).

7. The centralizer of claim 6, wherein the swing part (4) is provided with first torsion springs (13) sleeved on the rotating shaft at two sides, the first torsion springs (13) are used for enabling the swing part (4) to rotate and reset, and the rotating shaft of the rear top ring (44) and the rotating shaft of the front top ring (9) are provided with second torsion springs (14) enabling the rear top ring (44)/the front top ring (9) to rotate and reset.