CN113445952A - Wellhead sealing anti-overflow tool for oil pumping unit - Google Patents
Wellhead sealing anti-overflow tool for oil pumping unit Download PDFInfo
- Publication number
- CN113445952A CN113445952A CN202110725014.XA CN202110725014A CN113445952A CN 113445952 A CN113445952 A CN 113445952A CN 202110725014 A CN202110725014 A CN 202110725014A CN 113445952 A CN113445952 A CN 113445952A
- Authority
- CN
- China
- Prior art keywords
- sealing
- ball
- rubber cylinder
- flashboard
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Abstract
A wellhead sealing and anti-overflow tool for a pumping unit relates to the field of blowout prevention boxes of pumping units. And the split type sealing rubber cylinder and the rubber cylinder outer sleeve are adopted, so that the sealing element is more convenient to replace. The compensation spring is added, and when the sealing rubber barrel is slightly worn, the original compression amount can be kept under the action of the spring to achieve the purpose of sealing the polished rod; the anti-blowout ball is added to prevent well fluid from overflowing to pollute the environment when the polished rod is broken and taken off, the material density of the ball is close to the density of the well fluid, the polished rod can be ensured to float upwards quickly under the impact of the well fluid when the polished rod is broken and taken off to seal a channel, and the polished rod can be ensured not to be contacted with the polished rod to avoid the abrasion of the ball body during normal production. The spherical hinge mechanism is arranged at the joint of the three-way joint with the wellhead, so that the automatic adaptation to the positions of the pumping unit and the wellhead in the horizontal and vertical directions can be realized, the pumping rod polished rod of the pumping unit in the upper and lower working strokes is ensured to be in the correct position, the eccentric wear of the pumping rod polished rod, the sealing rubber barrel and the tool body is avoided, the service lives of the sealing rubber barrel, the pumping rod and the tool body are prolonged, and the economic benefit is improved.
Description
Technical Field
The invention relates to the field of blowout prevention boxes of oil pumping unit wellheads, in particular to an anti-overflow sealing tool for the oil pumping unit wellhead.
Background
The blowout prevention box at the well head of the pumping unit is well head equipment of the pumping unit, is connected with a well head three-way valve, is internally sealed by adopting a packing, and mainly has the function of sealing a polish rod of a pumping rod and preventing liquid in a well from leaking to cause well blowout and pollution.
At present, a common packing box is mostly applied to an oil field on site, the packing box does not accord with the actual eccentric amount of a polished rod, and the packing and a packing box body are easy to be worn eccentrically. When the packing or the disc box body is damaged, leakage can be generated, and the packing or even the whole packing box needs to be replaced. Meanwhile, the sucker rod is deflected to cause abrasion with the packing box, so that the service life of the polish rod is shortened, and oil leakage is caused. This not only results in the waste of crude oil, but also causes environmental pollution. And the packing replacement is very troublesome, and the production is delayed, the time and the labor are wasted and other unsafe factors exist. Oil field application packing is mostly the clip line formula O type packing or belt formula sealing material, because mainly lean on the extrusion to realize sealing during sealed, so frictional force is great, has increased the load of beam-pumping unit, in addition in case press not tight just produce easily and leak. In addition, because the common packing box has no blowout prevention structure, the well blowout phenomenon can be caused when the wellhead polished rod is broken, and the environment is greatly polluted.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a wellhead sealing and anti-overflow tool for a pumping unit.
The technical scheme adopted by the invention is as follows: a wellhead sealing and anti-overflow tool of a pumping unit is technically characterized by comprising an adjusting pressure cap, an upper spring seat, a compensating spring, a lower spring seat, a rubber sleeve outer sleeve, a sealing rubber sleeve, a lower guide sleeve, a fixing outer sleeve, a packing box main body, a screw rod, a gate plate body, a sealing gate plate, a threaded locking block, a screw plug, a blowout prevention ball seat, a clamp head, a deviation adjusting ball head, an upper ball seat, a deviation adjusting pressure cap and a lower ball seat; the lower guide sleeve is positioned and inserted in the packing box main body by utilizing a lower step, the rubber sleeve outer sleeve is attached to the conical surface on the inner wall of the packing box main body by utilizing the upper conical surface of the outer wall of the rubber sleeve outer sleeve, the rubber sleeve outer sleeve is attached to the conical surface on the inner wall of the fixed outer sleeve screwed on the packing box main body by utilizing the lower conical surface of the outer wall of the rubber sleeve outer sleeve, the rubber sleeve is sleeved in the rubber sleeve outer sleeve, the rubber sleeve outer sleeve is attached to the top of the lower guide sleeve by utilizing the lower end surface of the rubber sleeve outer sleeve, and the rubber sleeve outer sleeve is attached to the outer wall of the polished rod of the sucker rod by utilizing the inner arc surface of the inner wall of the rubber sleeve outer sleeve; the upper end of the lower spring seat is inserted into the rubber sleeve jacket, the lower end face of the lower spring seat is attached to the top face of the sealing rubber sleeve, the top of the lower spring seat is provided with an upper spring seat matched with the lower spring seat, the compensating spring is positioned between the lower spring seat and the upper spring seat, one end of the compensating spring is sleeved on the lower spring seat, the other end of the compensating spring is sleeved on the upper spring seat, the upper spring seat is further sleeved with an adjusting pressure cap for driving the upper spring seat to move downwards together, and the adjusting pressure cap drives the compensating spring to compress until the end faces of the upper spring seat and the lower spring seat are attached;
the packing box main body is also connected with a thread locking block which is in threaded connection with the fixed outer sleeve;
the packing box comprises a packing box main body, a first sealing gate plate, a second sealing gate plate, a first screw rod, a second screw rod, a first screw plug, a second screw plug, a first sealing gate plate, a second screw plug, a first screw plug, a second screw plug, a sealing gate plate and a sealing screw rod, wherein the first sealing gate plate and the second screw plug are arranged in the packing box main body in a sleeved mode; the second flashboard body is sleeved on the second sealing flashboard, and a second lead screw penetrates through the other end of the packing box main body to be connected with the second flashboard body and the second sealing flashboard and is fixed through a second screwed plug fixed on the other end of the packing box main body in a screwed mode; the first lead screw and the second lead screw on two sides rotate simultaneously and drive the first flashboard body and the second flashboard body to respectively seal and clamp a sucker rod polished rod (A) for replacing a sealing rubber cylinder;
a blowout prevention ball seat is fixedly connected outside the packing box main body, a blowout prevention ball is placed on the blowout prevention ball seat, and when the polished rod breaks and moves to a position below the blowout prevention ball, the blowout prevention ball moves upwards and is extruded on the inner wall of the packing box main body, and the blowout prevention ball is sealed to prevent well fluid from being sprayed outside;
the lower end of the blowout prevention ball seat is connected with a ball hinge mechanism, one end of the ball hinge mechanism is connected with a bias adjusting cap, the bias adjusting cap is connected with a clamp head, a gap is formed in the clamp head, the lower end of the ball hinge mechanism is arranged in the gap of the clamp head, the lower end of the ball hinge mechanism can swing in the gap to automatically adapt to the position of a sucker rod, and the ball hinge mechanism is used for preventing eccentric wear between the sucker rod and a sealing rubber cylinder and a packing box main body.
In the above scheme, the rubber sleeve jacket is of a split structure and is composed of a first rubber sleeve jacket and a second rubber sleeve jacket which are butted together.
In the scheme, the inner arc surface of the inner wall of the rubber cylinder outer sleeve is provided with a groove communicated with lubricating grease, and the lubricating grease seals the joint of the rubber cylinder outer sleeve and the sucker rod polished rod.
In the above scheme, the sealing rubber cylinder is of a split structure and is composed of a first sealing rubber cylinder and a second sealing rubber cylinder which are butted together.
In the scheme, the lower guide sleeve is provided with an annular groove, the annular groove of the guide sleeve is compressed by the sealing rubber cylinder under stress, and the lower guide sleeve and the end face of the sealing rubber cylinder form sealing.
In the scheme, the spherical hinge mechanism mainly comprises an upper ball seat, a lower ball seat and a deviation adjusting ball head, wherein the upper end of the deviation adjusting ball head is screwed and fixed on the blowout prevention ball seat, the lower end of the deviation adjusting ball head is connected with a deviation adjusting cap, the upper ball seat and the lower ball seat are respectively sleeved on the deviation adjusting ball head, the spherical surface of the upper ball seat and the spherical surface of the lower ball seat are respectively attached to the outer surface of the deviation adjusting ball head, and the upper end surface of the upper ball seat is attached to the deviation adjusting cap; the lower end surface of the lower ball seat is attached to the inner surface of the clamp head fixed on the bias-adjusting cap.
An automatic deviation adjusting method is realized by using the wellhead sealing and anti-overflow tool of the pumping unit according to claim 1, and the technical key points are that the method comprises the following steps:
loosening the bias adjusting cap to enable the upper ball seat, the lower ball seat and the bias adjusting ball head to be in an unlocked state; and swinging the upper ball seat and the lower ball seat in the gap of the hoop head until the deviation-adjusting ball head is naturally attached to the outer wall of the polished rod of the sucker rod.
The invention has the beneficial effects that: this sealed anti-overflow instrument of beam-pumping unit well head adopts split type sealing rubber tube and split type packing element overcoat, makes the change of sealing member more convenient. The compensation spring is designed, and when the sealing rubber barrel is slightly worn, the original compression amount can be kept under the action of the spring, so that the aim of sealing the polished rod for a long time is fulfilled; a dustproof sealing ring is added to prevent dust from entering the upper grinding polish rod and leaking; the anti-blowout ball is added, so that the situation that the well fluid overflows to pollute the environment when the polished rod is broken and taken off can be prevented, the material density of the ball is close to the well fluid density, the channel can be quickly floated up under the impact of the well fluid when the polished rod is broken and taken off, the polished rod can be ensured not to be contacted during normal production, and the abrasion of the ball body is avoided. The spherical hinge mechanism is designed at the part connected with the wellhead tee joint, and can automatically adapt to the positions of the pumping unit and the wellhead in the horizontal and vertical directions, so that the polished rod of the pumping unit in the up-down working stroke is ensured to be in the correct position, the eccentric wear of the polished rod of the pumping unit, the sealing rubber barrel and the tool body is avoided, the service lives of the sealing rubber barrel, the pumping rod and the tool body are prolonged, and the economic benefit is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an overflow prevention tool for a wellhead seal of a pumping unit in an embodiment of the invention;
FIG. 2 is a K-K view of FIG. 1 in an embodiment of the present invention;
FIG. 3 is a view from F-F of FIG. 1 in an embodiment of the present invention;
FIG. 4 is a view E-E of FIG. 1 in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a sealant cartridge according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a rubber sleeve jacket according to an embodiment of the present invention;
FIG. 7 is a schematic structural view of a lower guide sleeve in an embodiment of the present invention;
the numbers in the figure illustrate the following: 1 dustproof sealing ring, 2 upper spring seats, 3 compensating springs, 4 adjusting pressure caps, 5 rubber sleeve jackets, 6 rubber sealing rings, 7 set screws, 8 nuts, 9 sealing rubber sleeves, 10 lower guide sleeves, 11 first rubber sealing rings, 12 fixing jackets, 13 packing box bodies, 14 lead screws, 15 second rubber sealing rings, 16 third rubber sealing rings, 17 fourth rubber sealing rings, 18 brake block bodies, 19 thread locking blocks, 20 sealing brake blocks, 21 first countersunk screws, 22 second countersunk screws, 23 fifth rubber sealing rings, 24 screw plugs, 25 blowout prevention balls, 26 blowout prevention ball seats, 27 sixth rubber sealing rings, 28 clamp heads, 29 deviation adjusting ball heads, 30 upper ball seats, 31 deviation adjusting cap, 32 lower ball seats, 33 seventh rubber sealing rings, 34 lower spring seats and 35 eighth rubber sealing rings.
Detailed Description
The above objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention with reference to the accompanying drawings, which are illustrated in fig. 1 to 7.
The wellhead sealing and anti-overflow tool of the pumping unit adopted in the embodiment is shown in fig. 1. An upper spring seat 2, a lower spring seat 34, a rubber sleeve jacket 5, a sealing rubber sleeve 9, a lower guide sleeve 10, a thread locking block 19, a lead screw 14, a brake plate body 18, a sealing brake plate 20, a blowout prevention ball 25, a blowout prevention ball seat 26, an offset ball head 29, a ball hinge mechanism and a clamp head 28 are sequentially assembled in the packing box main body 13 from top to bottom. A third rubber seal ring 16 is arranged in a groove on the outer wall of the packing box main body 13.
The lower guide sleeve 10 in this embodiment is positioned on the inner wall of the packing box main body 13 by a stepped step at the bottom thereof. The rubber sleeve outer sleeves 5 are semi-cylindrical and used in pairs, the two rubber sleeve outer sleeves 5 are spliced together to form a hollow cylindrical sleeve matched with the sealing rubber sleeve for use, the upper conical surface (see the N position in figure 6) of the rubber sleeve outer sleeve 5 is attached and positioned with the conical surface on the packing box main body 13, the lower conical surface of the rubber sleeve outer sleeve 5 is attached and positioned with the conical surface (see the L position in figure 1) on the fixed outer sleeve 12, and the two rubber sections of the rubber sleeve outer sleeve 9 are firmly assembled together. The sealing rubber cylinders 9 are also semi-cylindrical and used in pairs, the two sealing rubber cylinders 9 are spliced together to form a hollow cylindrical sleeve, the lower end face of each sealing rubber cylinder 9 is attached to the lower guide sleeve 10, the inner arc face of each sealing rubber cylinder 9 is attached to the outer wall of the sucker rod polished rod A, a groove (shown as M in figure 5) is designed in each sealing rubber cylinder 9, lubricating grease can be filled in each groove, and good lubrication and good sealing of the sucker rod polished rod A in the reciprocating motion process can be guaranteed. In this embodiment, an annular groove (see P in fig. 7) is designed on the lower guide sleeve 10, so that the sealing effect of the end face can be better ensured when the packing rubber cylinder 5 is compressed. In this embodiment, a fourth rubber seal 17 is provided at the joint between the lower guide sleeve 10 and the packing box main body 13.
In this embodiment, the lower end of the lower spring seat 34 is inserted into the rubber sleeve outer sleeve 5, the upper end of the lower spring seat is inserted into the fixed outer sleeve 12, and the lower end surface of the lower spring seat 34 is attached to the upper end surface of the rubber sleeve 9. Be equipped with spring holder 2 in spring holder 34 top down, compensating spring 3 is located between spring holder 2 and the lower spring holder 34, compensating spring 3's up end and the laminating of last spring holder 2, compensating spring 3's lower pot head is in the excircle department of spring holder 34 down, when compensating spring 3 is compressed, can be with this bounce on sealed packing element 9 through spring holder 34 down effect, produce certain compression to sealed packing element 9, thereby can be the sealed effect between the assurance sealed packing element 9 of longer time and sucker rod polished rod A.
In this embodiment, the upper end of the adjusting pressing cap 4 is sleeved on the upper spring seat 2, and the lower end of the adjusting pressing cap is arranged outside the fixing outer sleeve 12 and fixed with the fixing outer sleeve 12 through threads. The fixing outer sleeve 12 passes through the adjusting press cap 4, the packing box main body 13, the lower spring seat 34 and the rubber sleeve outer sleeve 5 in sequence and fixes the components. When the adjusting press cap 4 rotates clockwise, the upper spring seat 2 is driven to move downwards together, so that the compensation spring 3 is compressed until the upper spring seat 2 is attached to the end face of the lower spring seat 34, and the sealing rubber cylinder 9 is partially compressed in the process; the adjusting pressing cap 4 is rotated again to drive the lower spring seat 34 to move, and the sealing rubber cylinder 9 is further compressed, so that the purpose of sealing the polish rod A of the sucker rod is achieved. Set screw 7 threaded connection presses cap 4 on the adjustment and fixes through nut 8, prevents that set screw 7 and adjustment from pressing cap 4 threaded connection department not hard up. When the set screw 7 is pressed against the groove on the outer circle of the fixed outer sleeve 12 (see the position Q in figure 1), the function of preventing the screw thread connection part of the adjusting pressing cap 7 and the fixed outer sleeve 12 from loosening is achieved. In the embodiment, a dustproof sealing ring 1 is arranged in a groove 4 at the joint of the adjusting pressure cap 4 and the packing box main body 13 and used for preventing dust from entering the tool. A first rubber sealing ring 11 is arranged between the packing box main body 13 and the fixed outer sleeve 12, and a rubber sealing ring 6 is arranged in a groove on the outer wall of the fixed outer sleeve 12.
In this embodiment, a screw lock 19 is further installed on the packing box main body 13, and the screw lock 19 is connected to the fixing sleeve 12 through a screw (see D in fig. 3). The first countersunk screw 21 penetrates through a hole in the thread locking block 19 and then is connected with the packing box main body 13 through threads, and the thread locking block 19 is fixed, and the first countersunk screw 21 is a screw with eccentricity and can move the thread locking block 19 downwards when rotating, so that the threaded connection at the position D is fastened more, and the purpose of preventing the threaded connection between the packing box main body 13 and the fixed outer sleeve 12 from loosening is achieved.
In this embodiment, a seal gate 20 is further installed in the packing box main body 13 below the fixing outer sleeve 12, and the seal gate 20 is externally sleeved on the gate body 18 and connected together by a second countersunk screw 22. The screw 14 passes through one end face of the packing box main body 13 and is inserted into a groove on the flashboard body 18, passes through the other end face of the packing box main body 13 through the sealed flashboard 20, and is connected with the plug 24 through threads. The flashboard, the flashboard body, the lead screw and the screw plug are all two, are symmetrically arranged on two sides of the packing box main body (13), and are connected in the same manner. The plug 24 is connected and fixed with the packing box main body 13 through threads. When the two-side screw rod rotates clockwise, the flashboard body 18 can be clamped and sealed with the sucker rod polished rod A, and then the upper sealing rubber cylinder 9 can be replaced. In the embodiment, a second rubber sealing ring 15 is arranged at the joint of the screw 14 and the packing box main body 13.
In the present embodiment, a blowout preventer ball seat 26 is externally screwed to the packing box main body 13. The blowout prevention ball 25 is placed in the blowout prevention ball seat 26, when the sucker rod polished rod A breaks and moves to a position below the position of the blowout prevention ball 25, liquid in the well impacts the blowout prevention ball 25, the blowout prevention ball 25 moves upwards and is squeezed at a position C (a conical surface is formed in the position C, the maximum size of a small end is smaller than the diameter of the blowout prevention ball, and therefore the blowout prevention ball cannot pass through the conical surface and is squeezed at the position C), and therefore the purposes of preventing well liquid from being blown out and protecting the well site environment are achieved. In the present embodiment, a fifth rubber seal ring 23 is provided at the joint of the packing box main body 13 and the blowout preventer ball seat 26.
The offset bulb 29 in this embodiment is threadably connected to and secured to the blowout preventer ball seat 26. The biasing cap 31 is threadably connected to and secured to the clip head 28. The upper ball seat 30 is sleeved outside the deviation-adjusting ball head 29 and is jointed through a spherical surface, and the upper end surface of the upper ball seat is jointed with a deviation-adjusting pressure cap 31; the lower seat 32 is fitted over the offset bulb 29 and is spherically engaged (see H in fig. 1), and its lower end surface engages the clip head 28. The upper ball seat 30, the lower ball seat 32 and the offset ball head 29 form a spherical hinge mechanism, and a gap B (see E-E in figure 1) is arranged in the hoop head 28, so that the tool can be adjusted in the horizontal direction and the vertical direction, thereby automatically adapting to the position of the polish rod A of the sucker rod, playing a role of preventing eccentric wear, and improving the sealing and the service life of the polish rod of the sucker rod. The sixth rubber sealing ring 27 is arranged at the joint of the blowout preventing ball seat 26 and the offset ball head 29. An eighth rubber sealing ring 35 is arranged at the joint of the lower ball seat 32 and the offset ball head 29. A seventh rubber sealing ring 33 is arranged in a groove on the outer wall of the clamp head 28.
Utilize the sealed anti-overflow instrument of beam-pumping unit well head in this embodiment, carry out the step of automatic tuningout as follows:
the sucker rod polish rod A is installed inside the anti-overflow tool, and then the wellhead sealing anti-overflow tool of the pumping unit is assembled on a wellhead tee and fixed (G in figure 1). The bias adjusting cap 31 is loosened for about 1/8 circles, then the pumping unit is started to enable the sucker rod polished rod A to run up and down for 2-3 times, the upper ball seat 30, the lower ball seat 32 and the bias adjusting ball head 29 are unlocked by the bias adjusting cap 31, and meanwhile, the upper ball seat and the lower ball seat can move to a certain degree in the horizontal direction due to the clearance B (shown as E-E in figure 1) in the hoop head 28; the upper ball seat 30, the lower ball seat 32 and the offset ball head 29 form a spherical hinge mechanism which can swing within a certain angle range by taking the center of a sphere as a center; finally, the whole tool can be adjusted in the horizontal direction and the vertical direction, so that the tool can automatically adapt to the position of the polished rod A of the sucker rod, the eccentric wear prevention effect is achieved, and the sealing performance and the service life of the polished rod A of the sucker rod are prolonged. After the position of the tool is automatically adjusted, the bias adjusting cap 31 is screwed and fixed, and then production can be normally carried out.
Utilize the sealed anti-overflow instrument of beam-pumping unit well head in this embodiment, keep the sealed step as follows of sucker rod polished rod A long-time:
the compensation spring 3 applies elasticity to the sealing rubber cylinder 9 in the compression process to compress the sealing rubber cylinder 9 to a certain extent, so that the sealing effect between the sealing rubber cylinder 9 and the sucker rod polished rod A can be ensured for a long time. Meanwhile, the split type sealing rubber barrel is adopted as a packing sealing element in the embodiment, a groove (see M in figure 5) is designed on the split type sealing rubber barrel, lubricating grease can be filled into the groove, good lubrication of the polished rod A of the sucker rod in the reciprocating motion process can be guaranteed, the friction force between the polished rod A of the sucker rod and the groove is reduced, and reliable sealing can be guaranteed. Meanwhile, as the lower guide sleeve 10 is provided with the annular groove (see the position P in figure 7), the sealing effect of the end face can be better ensured when the sealing rubber cylinder 9 is compressed. When the sealing rubber cylinder 9 runs for a period of time, the sealing rubber cylinder 9 can be further compressed only by clockwise rotating the adjusting pressure cap 4 for a certain angle, so that reliable sealing is ensured; therefore, the design of the sealing structure can realize long-time sealing of the polished rod A of the sucker rod.
Utilize the sealed anti-overflow instrument of beam-pumping unit well head in this embodiment, prevent that well liquid from spouting outward step as follows:
the tool is internally provided with a blowout prevention ball 25, when the polished rod A of the sucker rod is broken and moves to a position below the blowout prevention ball 25, liquid in the well can impact the blowout prevention ball, the blowout prevention ball moves upwards and can be squeezed at the position C (shown in figure 1) to form a linear seal, and therefore the purposes of preventing well liquid from being sprayed outside and protecting the well site environment are achieved.
In this embodiment, the overflow prevention tool is sealed at the wellhead of the pumping unit, and the steps of replacing the sealing element are as follows:
when the sealing rubber cylinder 9 needs to be replaced, the lead screws 14 on the two sides rotate clockwise, the brake plate body 18 is clamped and seals the sucker rod polish rod A, and high-pressure well fluid in the well below the brake plate is sealed. The first countersunk screw 21 is loosened and then the fixing cover 12 is removed. Because the rubber sleeve outer sleeve 5 and the sealing rubber sleeve 9 are separated, the two parts can be conveniently taken down, a new sealing rubber sleeve 9 is replaced, the sealing rubber sleeve is arranged in a tool, the first countersunk head screw 21 is screwed after the thread of the fixing outer sleeve 12 is screwed, and thus, the normal production can be realized. And other O type packing roots need one when changing to take out, because sucker rod polished rod A is in central point, and the space is narrow and small simultaneously, so the packing takes out and reinstallates the process very long, has wasted time.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A wellhead sealing and anti-overflow tool of a pumping unit is characterized by comprising an adjusting pressure cap (4), an upper spring seat (2), a compensating spring (3), a lower spring seat (34), a rubber sleeve outer sleeve (5), a sealing rubber sleeve (9), a lower guide sleeve (10), a fixing outer sleeve (12), a packing box main body (13), a lead screw (14), a flashboard body (18), a sealing flashboard (20), a thread locking block (19), a plug (24), a blowout prevention ball (25), a blowout prevention ball seat (26), a clamp head (28), a deviation adjusting ball head (29), an upper ball seat (30), a deviation adjusting pressure cap (31) and a lower ball seat (32); the lower guide sleeve (10) is positioned and inserted in the packing box main body (13) by utilizing a step at the lower part, the rubber cylinder outer sleeve (5) is attached to the conical surface on the inner wall of the packing box main body (13) by utilizing the upper conical surface of the outer wall of the rubber cylinder outer sleeve, the rubber cylinder outer sleeve (5) is attached to the conical surface on the inner wall of the fixed outer sleeve (12) which is screwed on the packing box main body (13) by utilizing the lower conical surface of the outer wall of the rubber cylinder outer sleeve, the sealing rubber cylinder (9) is sleeved in the rubber cylinder outer sleeve (5), the rubber cylinder outer sleeve (5) is attached to the top of the lower guide sleeve (10) by utilizing the lower end surface of the rubber cylinder outer sleeve, and the inner arc surface of the inner wall of the rubber cylinder outer sleeve (5) is attached to the outer wall of the sucker rod polish rod (A); the upper end of a lower spring seat (34) is inserted into a rubber sleeve outer sleeve (5), the lower end face of the lower spring seat (34) is attached to the top face of a sealing rubber sleeve (9), an upper spring seat (2) matched with the lower spring seat (34) is arranged at the top of the lower spring seat (34), a compensating spring (3) is located between the lower spring seat (34) and the upper spring seat (2), one end of the compensating spring (3) is sleeved on the lower spring seat (34), the other end of the compensating spring (3) is sleeved on the upper spring seat (2), an adjusting pressure cap (4) used for driving the upper spring seat (2) to move downwards together is further sleeved on the upper spring seat (2), and the adjusting pressure cap (4) drives the compensating spring (3) to compress until the end faces of the upper spring seat (2) and the lower spring seat (34) are attached;
the packing box main body (13) is also connected with a thread locking block (19), and the thread locking block (19) is in threaded connection with the fixed outer sleeve (12);
a first sealing flashboard (20), a first flashboard body (18), a second sealing flashboard and a second flashboard body are installed in the packing box main body (13), wherein the first sealing flashboard (20) and the second sealing flashboard, the first flashboard body (18) and the second flashboard body are symmetrically arranged, the first flashboard body (18) is sleeved on the first sealing flashboard (20), and a first lead screw (14) penetrates through one end of the packing box main body (13) to be connected with the first flashboard body (18) and the first sealing flashboard (20) and is fixed through a first screwed plug (24) fixed on one end of the packing box main body (13) in a screwed mode; the second flashboard body is sleeved on the second sealing flashboard, and a second lead screw penetrates through the other end of the packing box main body (13) to be connected with the second flashboard body and the second sealing flashboard and is fixed through a second plug fixed on the other end of the packing box main body (13) in a threaded manner; the first lead screw (14) and the second lead screw on two sides rotate simultaneously and drive the first flashboard body (18) and the second flashboard body to clamp the polish rod (A) of the sucker rod in a sealing manner, so that a sealing rubber cylinder can be replaced;
a blowout prevention ball seat (26) is fixedly connected outside the packing box main body (13), a blowout prevention ball (25) is placed on the blowout prevention ball seat (26), and when the polished rod breaks and moves to a position below the blowout prevention ball position, the blowout prevention ball (25) moves upwards and presses the inner wall of the packing box main body (13) and seals the position to prevent well fluid from being blown out;
the lower end of the blowout-preventing ball seat (26) is connected with a spherical hinge mechanism, one end of the spherical hinge mechanism is connected with a bias adjusting cap (31), the bias adjusting cap (31) is connected with a clamp head (28), a gap (B) is formed in the clamp head (28), the lower end of the spherical hinge mechanism is arranged in the gap (B) of the clamp head (28) and can swing in the gap (B) to automatically adapt to the position of a sucker rod polish rod (A), and eccentric wear between the sucker rod polish rod (A) and a sealing rubber sleeve (9) and a packing box main body (13) is prevented.
2. The tool for preventing overflow of a wellhead seal of a pumping unit according to claim 1, characterized in that the rubber cylinder jacket (5) is of a split structure and is composed of a first rubber cylinder jacket and a second rubber cylinder jacket which are butted together.
3. The tool for preventing overflow of the wellhead seal of the pumping unit according to claim 2, characterized in that the inner arc surface of the inner wall of the rubber cylinder jacket (5) is provided with a groove for introducing lubricating grease, and the lubricating grease seals the joint of the rubber cylinder jacket (5) and the polish rod (A) of the pumping rod.
4. The tool for preventing the wellhead from being overflowed by the pumping unit according to claim 1, wherein the sealing rubber cylinder (9) is of a split structure and is formed by a first sealing rubber cylinder and a second sealing rubber cylinder which are butted together.
5. The wellhead sealing and overflow-preventing tool of the pumping unit according to claim 1, characterized in that the lower guide sleeve (10) is provided with an annular groove, the annular groove of the guide sleeve (10) is compressed by the sealing rubber cylinder (9) under stress, and sealing is formed between the lower guide sleeve (10) and the end face of the sealing rubber cylinder (9).
6. The wellhead sealing and anti-overflow tool of the pumping unit according to claim 1, characterized in that the ball hinge mechanism mainly comprises an upper ball seat (30), a lower ball seat (32) and an offset adjusting ball head (29), the upper end of the offset adjusting ball head (29) is fixed on the blowout preventing ball seat (26) in a threaded manner, the lower end of the offset adjusting ball head (29) is connected with an offset adjusting cap (31), the upper ball seat (30) and the lower ball seat (32) are respectively sleeved on the offset adjusting ball head (29), the spherical surface of the upper ball seat (30) and the spherical surface of the lower ball seat (32) are respectively attached to the outer surface of the offset adjusting ball head (29), and the upper end surface of the upper ball seat (30) is attached to the offset adjusting cap (31); the lower end surface of the lower ball seat (32) is jointed with the inner surface of a clamp head (28) fixed on the bias adjusting cap (31).
7. An automatic deviation adjusting method is realized by the wellhead sealing and anti-overflow tool of the pumping unit according to claim 1,
the method comprises the following steps:
loosening the bias adjusting cap to enable the upper ball seat, the lower ball seat and the bias adjusting ball head to be in an unlocked state; and swinging the upper ball seat and the lower ball seat in the gap of the hoop head until the deviation-adjusting ball head is naturally attached to the outer wall of the polished rod of the sucker rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725014.XA CN113445952A (en) | 2021-06-29 | 2021-06-29 | Wellhead sealing anti-overflow tool for oil pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725014.XA CN113445952A (en) | 2021-06-29 | 2021-06-29 | Wellhead sealing anti-overflow tool for oil pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113445952A true CN113445952A (en) | 2021-09-28 |
Family
ID=77813932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110725014.XA Pending CN113445952A (en) | 2021-06-29 | 2021-06-29 | Wellhead sealing anti-overflow tool for oil pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113445952A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893143A (en) * | 2022-07-14 | 2022-08-12 | 威海海洋职业学院 | Ocean oil well wellhead assembly |
| CN117108234A (en) * | 2023-10-24 | 2023-11-24 | 克拉玛依红山油田有限责任公司 | Sectional type thermal recovery polished rod static seal structure |
-
2021
- 2021-06-29 CN CN202110725014.XA patent/CN113445952A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893143A (en) * | 2022-07-14 | 2022-08-12 | 威海海洋职业学院 | Ocean oil well wellhead assembly |
| CN114893143B (en) * | 2022-07-14 | 2022-09-09 | 威海海洋职业学院 | Ocean oil well wellhead assembly |
| CN117108234A (en) * | 2023-10-24 | 2023-11-24 | 克拉玛依红山油田有限责任公司 | Sectional type thermal recovery polished rod static seal structure |
| CN117108234B (en) * | 2023-10-24 | 2024-01-30 | 克拉玛依红山油田有限责任公司 | Sectional type thermal recovery polished rod static seal structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113445952A (en) | Wellhead sealing anti-overflow tool for oil pumping unit | |
| US20200399972A1 (en) | Wellhead sealing device of sucker-rod pumping machine | |
| CN106014324B (en) | The eccentric adjustment sealer of veneer blowout prevention economize on electricity | |
| CN2937459Y (en) | Double-offset polish rod sealer for pumping well | |
| CN214118139U (en) | Multi-stage pneumatic wellhead sealing device | |
| CN105971545B (en) | Polished rod sealing device special for pumping unit | |
| CN215408552U (en) | Wellhead sealing anti-overflow tool for oil pumping unit | |
| CN105971544B (en) | Trailing type compensates polish rod seal device automatically | |
| CN104251125A (en) | Universal follow-up bias adjusting polished rod sealing mechanism | |
| CN207701103U (en) | Multifunctional polish rod seal device | |
| WO2020113745A1 (en) | Wellhead polished rod sealing device for pumping unit | |
| CN114673467B (en) | Pneumatic constant pressure multistage sealing device for oil pumping machine well head | |
| CN101205801A (en) | Pumping unit polish rod centralized connecting device | |
| CN104499984A (en) | Polished rod seal adjustable packing box for oil field | |
| CN207961390U (en) | The front shock-absorber of remote-controlled motorcycle | |
| CN209908448U (en) | Pumping well polish rod sealing system | |
| CN201111543Y (en) | Universal regulation shaft mouth packing kit | |
| CN218954023U (en) | Shaft seal structure with on-line overhaul function | |
| CN201250634Y (en) | Polish rod aligning and connecting device of an oil pumping unit | |
| CN202882828U (en) | Double-layer omni-directional adjustable well opening device of heavy oil well | |
| CN213016268U (en) | Multifunctional blowout-preventing polish rod sealing box | |
| CN112593865A (en) | Self-lubricating type automatic deviation-adjusting rubber gate for polished rod and using method thereof | |
| CN211009886U (en) | Tension adjustment double-roller set deviation rectifying packing box | |
| CN115162997B (en) | Oil pumping polished rod sealing device for oil field | |
| CN220365551U (en) | Oil pumping machine wellhead grease injection polished rod sealer and special grease injection gun |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |