CN105649567B - A kind of oil pumping machine well head stabilizer - Google Patents
A kind of oil pumping machine well head stabilizer Download PDFInfo
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- CN105649567B CN105649567B CN201410645845.6A CN201410645845A CN105649567B CN 105649567 B CN105649567 B CN 105649567B CN 201410645845 A CN201410645845 A CN 201410645845A CN 105649567 B CN105649567 B CN 105649567B
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- supporting sleeve
- well head
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Abstract
The invention discloses a kind of oil pumping machine well head stabilizers, belong to pumping unit technical field.The oil pumping machine well head stabilizer includes：First supporting sleeve, the second supporting sleeve, adjustment mechanism and retaining mechanism, the present invention is fixedly connected by the first supporting sleeve with well head, second supporting sleeve is fixedly connected with casing head cover, and by adjusting the distance between the first supporting sleeve of institutional adjustment, the second supporting sleeve, it is fastened by a pair of of semicircular pipe of the first supporting sleeve of retaining mechanism and the second supporting sleeve as circle, it prevents well head from altering on continuing and breaking pipeline, and avoids tripping worker using steel wire rope near well head.
Description
Technical field
The present invention relates to pumping unit technical field, more particularly to a kind of oil pumping machine well head stabilizer.
Background technology
At the well head scene for using oil pumping machine oil pumping, because some well heads cement the well unstable or well cementation basis loosely, in pumping unit
When adopting pumping, there are well head with the excelsior suction force of pumping unit move upwards the phenomenon that, so as to cause well head depart from basis
The situation altered on afterwards can break pipeline when serious.
Well head caused by being altered in order to prevent on well head is unstable, fixes well head frequently with steel wire rope in the prior art, i.e., in well
The surrounding ground piling of mouth, one end of steel wire rope is fixed on well head, and the other end is fixed in stake, tightens steel wire rope, so as to
Fixed well head.
In the implementation of the present invention, inventor has found that the prior art has at least the following problems：
In the case where night is pitch-dark, exposed steel wire rope easily trips the worker of trip.
The content of the invention
In order to which the exposed steel wire rope for solving the problems, such as the prior art easily trips the worker of trip, the present invention is implemented
Example provides a kind of oil pumping machine well head stabilizer.The technical solution is as follows：
A kind of oil pumping machine well head stabilizer, is arranged between casing head cover and well head, the oil pumping machine well head stabilizer bag
The first supporting sleeve, the second supporting sleeve, adjustment mechanism and retaining mechanism are included,
First supporting sleeve is fixedly connected with the well head, and second supporting sleeve is fixed with described sleeve pipe head cover
Connection, first supporting sleeve are stacked up and down with the second supporting sleeve Relative vertical direction, first support
Casing and second supporting sleeve include a pair of of semicircular pipe, and the pair of semicircular pipe is oppositely arranged,
The adjustment mechanism is arranged between first supporting sleeve and second supporting sleeve, the adjustment mechanism
For adjusting the vertical range between first supporting sleeve and second supporting sleeve,
The retaining mechanism is arranged on the pair of semicircular pipe, and the retaining mechanism is used to lock the pair of semicircle
Shape pipe is fastened by the pair of semicircular pipe of the retaining mechanism as circle.
Further, the adjustment mechanism is provided with multiple, relatively described first supporting sleeve of multiple adjustment mechanisms
And the periphery of second supporting sleeve is uniformly distributed.
Further, the adjustment mechanism includes one-to-one first fixing nut, the second fixing nut, rise pipe nipple
And adjustment portion,
First fixing nut is fixed on the outer wall of the first supporting sleeve lower end, and second fixing nut is consolidated
It is scheduled on the outer wall of the second supporting sleeve upper end, and first fixing nut and the coaxial cloth of the second fixing nut
Put, first fixing nut and second fixing nut it is oppositely oriented, the rise pipe nipple both ends are equipped with screw thread, described
It raises the rotation direction of pipe nipple both ends screw thread and the rotation direction of the rotation direction of first fixing nut and second fixing nut matches, institute
The end of thread for stating rise pipe nipple is meshed with first fixing nut, another end of thread and described the of the rise pipe nipple
Two fixing nuts are meshed, and the adjustment portion is fixed on the rise pipe nipple,
Working condition turns adjustment portion, by the adjustment portion rise pipe nipple is driven to rotate, short by the rise
The both ends screw thread of section engages respectively with first fixing nut and second fixing nut, realizes first supporting sleeve
The adjusting of vertical range between second supporting sleeve.
Specifically, the adjustment portion is arranged on the middle part of the rise pipe nipple.
Specifically, the adjustment portion is six side's adjusting nuts.
Further, first fixing nut is welded on first supporting sleeve, the second fixing nut weldering
It is connected on second supporting sleeve.
Specifically, the retaining mechanism sets more sets, covers the retaining mechanism more and is evenly distributed on the pair of semicircle
Guan Shang.
Further, the retaining mechanism includes one-to-one single ended bolt, has internal buckle nut and without internal buckle nut, institute
It states on the semicircular pipe that internal buckle nut is arranged in the pair of semicircular pipe, the no internal buckle nut is arranged in correspondence with
On another semicircular pipe in the pair of semicircular pipe, the single ended bolt penetrates the no internal buckle nut and institute successively
Internal buckle nut has been stated, has passed through the single ended bolt and the fixation for having internal buckle nut to engage, realizing the pair of semicircular pipe
And the adjustment of the pair of semicircular pipe centre-to-centre spacing.
Further, the retaining mechanism sets four sets, and four sets of retaining mechanisms are arranged in pairs in the pair of semicircle
On the openend outer wall side of shape pipe, the openend outer wall of the pair of semicircular pipe is unilateral to be set in four sets of retaining mechanisms
A set of retaining mechanism, and circumferentially disposed four sets of retaining mechanisms of openend outer wall side of the pair of semicircular pipe
In two sets of retaining mechanisms.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
The present invention is fixedly connected by the first supporting sleeve with well head, and the second supporting sleeve is fixedly connected with casing head cover,
And by adjusting the distance between the first supporting sleeve of institutional adjustment, the second supporting sleeve, by retaining mechanism first
It is circle that a pair of of semicircular pipe of support set pipe and the second supporting sleeve, which fastens, prevents well head from altering on continuing and breaking pipeline, and keeps away
Exempt to trip worker using steel wire rope near well head.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is oil pumping machine well head stabilizer structure diagram provided in an embodiment of the present invention；
Fig. 2 is the top view of oil pumping machine well head stabilizer provided in an embodiment of the present invention.
Wherein：
1 first supporting sleeve,
2 second supporting sleeves,
3 adjustment mechanisms, 31 rise pipe nipples, 32 first fixing nuts, 33 second fixing nuts, 34 adjustment portions,
4 retaining mechanisms, 41 have internal buckle nut, and 42 without internal buckle nut, 43 single ended bolts.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in Figure 1, present embodiments provide a kind of oil pumping machine well head stabilizer, be arranged on casing head cover and well head it
Between, the oil pumping machine well head stabilizer includes the first supporting sleeve 1, the second supporting sleeve 2, adjustment mechanism 3 and retaining mechanism 4,
First supporting sleeve 1 is fixedly connected with the well head, and second supporting sleeve 2 is consolidated with described sleeve pipe head cover
Fixed connection, first supporting sleeve 1 are stacked up and down with the 2 Relative vertical direction of the second supporting sleeve, and described first
Supporting sleeve 1 and second supporting sleeve 2 include a pair of of semicircular pipe, and the pair of semicircular pipe is oppositely arranged,
The adjustment mechanism 3 is arranged between first supporting sleeve 1 and second supporting sleeve 2, the adjustment
Mechanism 3 is used to adjust the vertical range between first supporting sleeve 1 and second supporting sleeve 2,
The retaining mechanism 4 is arranged on the pair of semicircular pipe, and the retaining mechanism 4 is used to lock the pair of half
Round tube is fastened by the 4 the pair of semicircular pipe of retaining mechanism as circle.
The operation principle of the present invention：
The present invention is mounted between well head and casing head cover, retaining mechanism 4 is arranged on a couple half for the first supporting sleeve 1
On a pair of of semicircular pipe of round tube and the second supporting sleeve 2, the first supporting sleeve 1 and second are locked by retaining mechanism 4
A pair of of semicircular pipe of support set pipe 2 so that a pair of of semicircular pipe of the first supporting sleeve 1 and the second supporting sleeve 2 fastens respectively
For circle, according to the height altered on well head, adjusted by adjusting mechanism 3 between the first supporting sleeve 1 and the second supporting sleeve 2
Distance.
The present invention is fixedly connected by the first supporting sleeve 1 with well head, and the second supporting sleeve 2 is fixed with casing head cover to be connected
It connects, and the distance between the first supporting sleeve 1, second supporting sleeve 2 is adjusted by adjusting mechanism 3, pass through retaining mechanism 4
It is circle that a pair of of semicircular pipe of first supporting sleeve 1 and the second supporting sleeve 2, which fastens, prevents well head from altering on continuing and breaking pipe
Line, and avoid tripping worker using steel wire rope near well head.
The present invention also have simple in structure, safe and reliable, simple operation, it is highly practical and convenient for manufacture, beneficial to popularization
Feature.
In the implementation of the present invention, inventor has found：In the prior art, the well head above altered is easily off-center, and
Steel wire rope is due to the property of itself, it is impossible to ensure well head well without departing from center, well head is off-center can cause polished rod and
The phenomenon that packing is worn so as to cause the generation of oily phenomenon is run, influences normally to produce；And the well head of eccentric wear needs frequent carousel
Root, increases the labor intensity and cost payout of staff, and rate when influencing to drive a well.
To solve the above-mentioned problems, as depicted in figs. 1 and 2, the adjustment mechanism 3 is provided with multiple, multiple adjustment
The periphery of relatively described first supporting sleeve 1 of mechanism 3 and second supporting sleeve 2 is uniformly distributed.Adjustment mechanism 3 is used to adjust
The distance between first supporting sleeve 1 and the second supporting sleeve 2, it is uniform in the first supporting sleeve 1 and 2 periphery of the second supporting sleeve
Multiple adjustment mechanisms 3 are set, it is ensured that it adjusts reliably, and, by adjusting multiple adjustment machines. between multiple adjustment mechanisms 3 independently of each other
One or more of structure 3 can adjust the angle of 2 axis of the first supporting sleeve 1 and the second supporting sleeve, prevent that well head center is inclined
From and wear polished rod and packing, avoid frequently replacing packing, effectively save production cost, reduce labor strength.
Preferably, as shown in Fig. 2, in the present embodiment, there are four the adjustment mechanism 3 is set, four adjustment mechanisms 3 are along
The periphery of one supporting sleeve 1 and the second supporting sleeve 2 is uniformly distributed.
As shown in Figure 1, specifically, the adjustment mechanism 3 includes one-to-one first fixing nut 32, second and fixes spiral shell
Mother 33, rise pipe nipple 31 and adjustment portion 34,
First fixing nut 32 is fixed on the outer wall of 1 lower end of the first supporting sleeve, and described second fixes spiral shell
Mother 33 is fixed on the outer wall of 2 upper end of the second supporting sleeve, and first fixing nut 32 fixes spiral shell with described second
Mother 33 is coaxially arranged, oppositely oriented, the rise pipe nipple 31 of first fixing nut 32 and second fixing nut 33
Both ends are equipped with screw thread, the rotation direction and described second of the rotation direction and first fixing nut 32 of the rise 31 both ends screw thread of pipe nipple
The rotation direction of fixing nut 33 matches, and an end of thread of the rise pipe nipple 31 is meshed with first fixing nut 32, described
Another end of thread of rise pipe nipple 31 is meshed with second fixing nut 33, and it is short that the adjustment portion 34 is fixed on the rise
On section 31,
Working condition turns adjustment portion 34, by the adjustment portion 34 the rise pipe nipple is driven to rotate, passes through the liter
The both ends screw thread of high pipe nipple 31 engages respectively with first fixing nut 32 and second fixing nut 33, realizes described the
The adjusting of vertical range between one supporting sleeve 1 and second supporting sleeve 2.
In the present embodiment, by turning adjustment portion 34, because of the first fixing nut 32 and the rotation direction of the second fixing nut 33
On the contrary, therefore the first supporting sleeve 1 and the second supporting sleeve 2 raise the direction of motion of pipe nipple 31 on the contrary, such as the first supporting sleeve relatively
When the opposite rise pipe nipple 31 of pipe 1 rises, the second supporting sleeve 2 is moved downward with the opposite rise pipe nipple 31 of identical speed, so
Design substantially reduces the time for adjusting the distance between the first supporting sleeve 1 and the second supporting sleeve 2, and work efficiency is high, and
It is easy to operate.
As shown in Figure 1, the adjustment portion 34 is arranged on the middle part of the rise pipe nipple 31.Because of the first fixing nut 32 and the
Two fixing nuts 33 it is oppositely oriented, by adjustment portion 34 be arranged on rise pipe nipple 31 middle part can be achieved quickly to adjust.
As shown in Figure 1, the adjustment portion 34 is six side's adjusting nuts.Using six side's adjusting nuts as the adjusting of the present invention
Portion convenient for adjusting, and so that overall structure is simple, easy to process.Certainly, skilled person will appreciate that, the adjustment portion 34
It can also be cubic adjusting nut etc..The adjustment portion 34, which can also be, directly to be processed on rise pipe nipple similar to adjusting spiral shell
Female structure, for example, be symmetricly set on two planes on rise pipe nipple, the adjustment portion 34 is meet spanner operation any
Structure.
As shown in Fig. 2, first fixing nut 32 is welded on first supporting sleeve 1, described second fixes spiral shell
Mother 33 is welded on second supporting sleeve 2.The first fixing nut 32 and the second fixing nut 33 are welded respectively by welding
It is connected on the first supporting sleeve 1 and the second supporting sleeve 2, stable connection, avoids the first fixing nut 32 and the second fixing nut
The 33 disconnection effects during the shearing force and axial friction of rise pipe nipple 31 act on.Certainly, people in the art
Member understands that the first fixing nut 32 and the second fixing nut 33 can be also designed as with the first supporting sleeve 1 and the second supporting sleeve 2
One.
As shown in Figure 1, the retaining mechanism 4 sets more sets, cover the retaining mechanism 4 more and be evenly distributed on the pair of half
On round tube.Retaining mechanism 4 is for the first supporting sleeve 1 of locking and a pair of of semicircular pipe of the second supporting sleeve 2 so that first
1 and second supporting sleeve 2 of supporting sleeve is respectively fitted over outside oil pipe.
As shown in Figure 1, the retaining mechanism 4 includes one-to-one single ended bolt 43, has internal buckle nut 41 and without internal buckle
Nut 42, on a semicircular pipe for thering is internal buckle nut 41 to be arranged in the pair of semicircular pipe, the no internal buckle spiral shell
Mother 42 is arranged in correspondence on another semicircular pipe in the pair of semicircular pipe, and the single ended bolt 43 penetrates institute successively
State no internal buckle nut 42 and it is described have internal buckle nut 41, there is internal buckle nut 41 to engage realization with described by the single ended bolt 43
The fixation of the pair of semicircular pipe and the adjustment of the pair of semicircular pipe centre-to-centre spacing.
By single ended bolt 43, there are internal buckle nut 41 and design without internal buckle nut 42, single ended bolt 43 penetrates nothing successively
Internal buckle nut 42 and have internal buckle nut 41, by single ended bolt 43 with have engaging for internal buckle nut 41, adjust single ended bolt 43, can
A pair of of semicircular pipe of the first supporting sleeve 1 and the respective centre-to-centre spacing of a pair of of semicircular pipe of the second supporting sleeve 2 are adjusted, and will
A pair of of semicircular pipe of first supporting sleeve 1 is fastened to be circular, and a pair of of semicircular pipe of the second supporting sleeve 2 is fastened as circle
Shape so that the present invention can be used for the well head for consolidating different size requirements.
As shown in Figure 1, the retaining mechanism 4 sets four sets, four sets of retaining mechanisms 4 are arranged in pairs the pair of semicircle
On the openend outer wall side of shape pipe, the openend outer wall of the pair of semicircular pipe is unilateral to set four sets of retaining mechanisms 4
In a set of retaining mechanism 4, and the circumferentially disposed four sets of locking of openend outer wall side of the pair of semicircular pipe
Two sets of retaining mechanisms 4 in mechanism 4.
First supporting sleeve 1 and the second supporting sleeve 2 include a pair of of semicircular pipe, by taking the first supporting sleeve 1 as an example, the
A pair of of semicircular pipe of one supporting sleeve 1 will be fastened as circle, then there are two openends, two openends are required to locking simultaneously
It is fixed, therefore two openends on a pair of of semicircular pipe were respectively set on a set of retaining mechanism 4 namely a pair of of semicircular pipe along week
To two cover locking mechanisms 4 of setting, same first supporting sleeve 1 of setting of the retaining mechanism 4 on the second supporting sleeve 2.Certainly, ability
Field technique personnel understand that, in order to enable connection is more reliable, retaining mechanism 4 may also be configured to eight sets, 12 sets etc., it is preferable that
In the present embodiment, the retaining mechanism 4 sets eight sets.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of oil pumping machine well head stabilizer, is arranged between casing head cover and well head, which is characterized in that the oil pumping machine well head
Stabilizer includes the first supporting sleeve, the second supporting sleeve, adjustment mechanism and retaining mechanism,
First supporting sleeve is fixedly connected with the well head, and second supporting sleeve is fixed with described sleeve pipe head cover to be connected
It connects, first supporting sleeve is stacked up and down with the second supporting sleeve Relative vertical direction, first supporting sleeve
Pipe and second supporting sleeve include a pair of of semicircular pipe, and the pair of semicircular pipe is oppositely arranged,
The adjustment mechanism is arranged between first supporting sleeve and second supporting sleeve, and the adjustment mechanism is used for
The vertical range between first supporting sleeve and second supporting sleeve is adjusted,
The retaining mechanism is arranged on the pair of semicircular pipe, and the retaining mechanism is used to lock the pair of semicircle
Pipe is fastened by the pair of semicircular pipe of the retaining mechanism as circle；
The adjustment mechanism is provided with multiple, relatively described first supporting sleeve of multiple adjustment mechanisms and second support
The periphery of casing is uniformly distributed；
The adjustment mechanism includes one-to-one first fixing nut, the second fixing nut, rise pipe nipple and adjustment portion,
First fixing nut is fixed on the outer wall of the first supporting sleeve lower end, and second fixing nut is fixed on
On the outer wall of the second supporting sleeve upper end, and first fixing nut and second fixing nut are coaxially arranged, institute
The oppositely oriented of the first fixing nut and second fixing nut is stated, the rise pipe nipple both ends are equipped with screw thread, the rise
The rotation direction of pipe nipple both ends screw thread matches with the rotation direction of first fixing nut and the rotation direction of second fixing nut, the liter
One end of thread of high pipe nipple is meshed with first fixing nut, and another end of thread of the rise pipe nipple is consolidated with described second
To determine nut to be meshed, the adjustment portion is fixed on the rise pipe nipple,
Working condition turns adjustment portion, by the adjustment portion rise pipe nipple is driven to rotate, passes through the rise pipe nipple
Both ends screw thread engages respectively with first fixing nut and second fixing nut, realizes first supporting sleeve and institute
State the adjusting of vertical range between the second supporting sleeve.
2. oil pumping machine well head stabilizer according to claim 1, which is characterized in that the adjustment portion is arranged on the rise
The middle part of pipe nipple.
3. oil pumping machine well head stabilizer according to claim 1, which is characterized in that the adjustment portion adjusts spiral shell for six sides
It is female.
4. oil pumping machine well head stabilizer according to claim 1, which is characterized in that first fixing nut is welded on institute
It states on the first supporting sleeve, second fixing nut is welded on second supporting sleeve.
5. oil pumping machine well head stabilizer according to claim 1, which is characterized in that the retaining mechanism sets more sets, more
The retaining mechanism is covered to be evenly distributed on the pair of semicircular pipe.
6. the oil pumping machine well head stabilizer according to any one of claim 1-5 claim, which is characterized in that the locking
Mechanism includes one-to-one single ended bolt, has internal buckle nut and without internal buckle nut, described to have internal buckle nut to be arranged on described one
To on a semicircular pipe in semicircular pipe, the no internal buckle nut is arranged in correspondence with another in the pair of semicircular pipe
On one semicircular pipe, the single ended bolt penetrate successively the no internal buckle nut and it is described have internal buckle nut, pass through the list
Hook bolt has internal buckle nut to engage the fixation for realizing the pair of semicircular pipe and the pair of semicircular pipe centre-to-centre spacing with described
Adjustment.
7. oil pumping machine well head stabilizer according to claim 6, which is characterized in that four sets of the retaining mechanism setting, four
The retaining mechanism is covered to be arranged in pairs on the openend outer wall side of the pair of semicircular pipe, the pair of semicircular pipe
The openend outer wall unilateral a set of retaining mechanism set in four sets of retaining mechanisms, and the pair of semicircular pipe is opened
Two sets of retaining mechanisms in the mouth circumferentially disposed four sets of retaining mechanisms of end outer wall side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645845.6A CN105649567B (en) | 2014-11-12 | 2014-11-12 | A kind of oil pumping machine well head stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645845.6A CN105649567B (en) | 2014-11-12 | 2014-11-12 | A kind of oil pumping machine well head stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105649567A CN105649567A (en) | 2016-06-08 |
| CN105649567B true CN105649567B (en) | 2018-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410645845.6A Active CN105649567B (en) | 2014-11-12 | 2014-11-12 | A kind of oil pumping machine well head stabilizer |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216890B (en) * | 2020-02-04 | 2023-01-10 | 中国石油天然气股份有限公司 | Fixing and adjusting device and adjusting method for oil well casing |
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|---|---|---|---|---|
| RU2158353C1 (en) * | 1999-03-10 | 2000-10-27 | Предприятие "Надымгазпром" | Method of stabilization of heat state of wellhead zone ion permafrost rocks |
| CA2610005C (en) * | 2007-11-05 | 2012-06-19 | Central Alberta Well Services Corp. | Well servicing support structure |
| CN202531049U (en) * | 2012-02-07 | 2012-11-14 | 中国石油天然气股份有限公司 | Packing mounting centralizer for pumping unit wellhead |
| CN203495850U (en) * | 2013-08-23 | 2014-03-26 | 中国石油化工股份有限公司 | Wellhead detachment auxiliary tool |
| CN203792277U (en) * | 2014-03-31 | 2014-08-27 | 中国石油化工股份有限公司 | Flange spreading adjusting device with length-adjustable auxiliary rod |
| CN204283301U (en) * | 2014-11-12 | 2015-04-22 | 中国石油天然气股份有限公司 | A kind of oil pumping machine well head stabilizer |
-
2014
- 2014-11-12 CN CN201410645845.6A patent/CN105649567B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2158353C1 (en) * | 1999-03-10 | 2000-10-27 | Предприятие "Надымгазпром" | Method of stabilization of heat state of wellhead zone ion permafrost rocks |
| CA2610005C (en) * | 2007-11-05 | 2012-06-19 | Central Alberta Well Services Corp. | Well servicing support structure |
| CN202531049U (en) * | 2012-02-07 | 2012-11-14 | 中国石油天然气股份有限公司 | Packing mounting centralizer for pumping unit wellhead |
| CN203495850U (en) * | 2013-08-23 | 2014-03-26 | 中国石油化工股份有限公司 | Wellhead detachment auxiliary tool |
| CN203792277U (en) * | 2014-03-31 | 2014-08-27 | 中国石油化工股份有限公司 | Flange spreading adjusting device with length-adjustable auxiliary rod |
| CN204283301U (en) * | 2014-11-12 | 2015-04-22 | 中国石油天然气股份有限公司 | A kind of oil pumping machine well head stabilizer |
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| Publication number | Publication date |
|---|---|
| CN105649567A (en) | 2016-06-08 |
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