CN210307587U

CN210307587U - Christmas tree dismounting and maintaining tool

Info

Publication number: CN210307587U
Application number: CN201920917414.9U
Authority: CN
Inventors: 许克新; 张坤鹏; 吴昊; 王战胜; 彭经武; 陈�峰
Original assignee: China Petroleum and Chemical Corp; Sinopec Zhongyuan Oilfield Co Pudong Oil Production Plant
Current assignee: China Petroleum and Chemical Corp; Sinopec Zhongyuan Oilfield Co Pudong Oil Production Plant
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-04-14
Anticipated expiration: 2029-06-18

Abstract

The utility model relates to a production tree dismouting maintenance frock. Production tree dismouting maintenance frock includes: the two sets of jacking units are respectively provided with a linear output end, synchronously extend and retract when in use, are symmetrically arranged on two sides of the central pipes of the upper four-way and the lower four-way, the lower ends of the jacking units are respectively used for being relatively fixed with the left sleeve valve and the right sleeve valve of the lower four-way, and the upper ends of the jacking units are respectively used for being matched with the left production valve jacking strut and the right production valve jacking strut of the upper; the guide structure comprises at least two guide rods, and is used for penetrating into corresponding flange connecting holes of the upper cross butt joint flange and the lower cross butt joint flange up and down, so that the upper cross is prevented from inclining and toppling when being jacked to move upwards. The upper cross can be moved up and down by controlling the linear output ends of the two sets of jacking units to synchronously stretch out and draw back, the upper cross is guided by the guide structure, the upper cross is prevented from inclining and falling to bring potential safety hazards, the whole operation process only needs to operate the two sets of jacking units, the operation is convenient, time and labor are saved, and the maintenance cost is reduced.

Description

Christmas tree dismounting and maintaining tool

Technical Field

The utility model relates to an oil gas exploitation equipment maintenance device field, concretely relates to production tree dismouting maintenance frock.

Background

The Christmas tree is an important wellhead device in an oil and gas exploitation field, is formed by connecting and combining various valves and short sections, and has larger overall weight. The central pipes of the upper four-way joint and the lower four-way joint of the Christmas tree are butted through the butting flange, and the sealing steel ring is installed at the butting position of the flanges, so that the sealing effect is ensured, the oil gas leakage is avoided, and the sealing steel ring needs to be maintained and replaced regularly in daily production. The traditional operation method comprises the steps of detaching connecting bolts on butt-joint flanges of the upper cross joint and the lower cross joint, using tools such as a crane, a truck-mounted crane and a tripod, lifting the upper cross joint upwards by a lifting means, separating the upper cross joint from the lower cross joint, maintaining or replacing a sealing ring, putting down the upper cross joint after maintenance or replacement is finished, butting the upper cross joint with the lower cross joint, and fixing the upper cross joint and the lower cross joint through the connecting bolts. The operation method is influenced by various factors such as manpower, scheduling, vehicles and the like, and not only is the operation troublesome and time-consuming and labor-consuming, but also the cost is higher.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a production tree dismouting maintenance frock to solve and adopt traditional operating method to maintain sealed steel ring, troublesome poeration, the just problem with high costs of wasting time and energy.

In order to achieve the above purpose, the utility model discloses christmas tree dismouting maintenance frock's technical scheme is:

production tree dismouting maintenance frock includes: the two sets of jacking units are respectively provided with a linear output end, synchronously extend and retract when in use, are symmetrically arranged on two sides of the central pipes of the upper four-way and the lower four-way, the lower ends of the jacking units are respectively used for being relatively fixed with the left sleeve valve and the right sleeve valve of the lower four-way, and the upper ends of the jacking units are respectively used for being matched with the left production valve jacking strut and the right production valve jacking strut of the upper; the guide structure comprises at least two guide rods, and is used for penetrating into corresponding flange connecting holes of the upper cross butt joint flange and the lower cross butt joint flange up and down, so that the upper cross is prevented from inclining and toppling when being jacked to move upwards.

The utility model has the advantages that: when the jacking device is used, the two sets of jacking units are symmetrically arranged on two sides of the central pipe of the upper four-way and the lower four-way, when the linear output ends of the two sets of jacking units are controlled to synchronously extend, the upper four-way is jacked to move upwards and is separated from the lower four-way, a sealing steel ring between the butting flanges of the upper four-way and the lower four-way can be maintained and replaced, when the linear output ends of the two sets of jacking units are controlled to synchronously retract, the upper four-way moves downwards and is butted with the lower four-way, when the upper four-way moves up and down, the upper four-way is guided by the guide structure, the situation that the upper four-way tilts obliquely and brings potential safety hazards to operators is avoided, meanwhile, the upper four-way can be guaranteed to be accurately butted.

The jacking unit is further limited and comprises a hydraulic jack and a jacking structure, the lower end of the jacking structure is fixed at the upper end of the hydraulic jack, and the upper end of the jacking structure is used for jacking the corresponding side of the upper four-way valve. The oil field construction site is usually provided with a hydraulic jack, and the hydraulic jack is selected as the jacking unit for convenient on-site taking; in addition, the hydraulic jack has a light structure and is convenient to carry and operate; the jacking structure is used with hydraulic jack cooperation, can further increase the lifting height.

Furthermore, the shore structure passes through connection structure and hydraulic jack's upper end fixed connection, connection structure includes that at least two lamellas press from both sides the dress slips, and the internal face of respectively pressing from both sides the dress slips has the interior screw thread with the external screw thread looks lock on hydraulic jack's the ejector pin, and the outer wall of respectively pressing from both sides the dress slips has outer screw thread, and when each presss from both sides the dress slips when the spiral shell is in the ejector pin outside of hydraulic jack, outer screw thread forms complete external connection screw thread, and connection structure still includes the switching cover of spiral shell dress on external connection screw thread, and the shore structure is connected with the switching cover. The fixed connection between the top bracing structure and the upper end of the hydraulic jack is more reliable.

Furthermore, the top bracing structure is connected with the adapter sleeve in a plug-in manner. The connection of the top bracing structure is more convenient.

Further inject the switching cover, the switching cover includes big footpath section and path section for the internal thread setting of adorning soon with external connection screw thread is in the path section, and big footpath section and path section transitional coupling's position department are equipped with interior step, and the stull structure cartridge just with interior step butt in big footpath section. The adapter sleeve is arranged outside the clamping slips in a rotating mode, the inner step is used for supporting the supporting structure, and the upper end of the clamping slips can abut against the inner step after the adapter sleeve rotates for a period of time, so that the adapter sleeve cannot rotate continuously, the inner step can limit the rotating assembly of the adapter sleeve on the clamping slips, and the adapter sleeve is connected with the clamping slips more reliably.

The top bracing structure is further limited and comprises a top bracing rod and a top bracing seat arranged at the upper end of the top bracing rod, the lower end of the top bracing rod is fixed at the upper end of the hydraulic jack, and the top bracing seat is provided with a top bracing surface used for being matched with the top bracing of the production valve at the corresponding side of the upper four-way valve. The top support seat is contacted with the upper four-way surface, so that the top support is more reliable.

The guide rods are further limited and are three, and the three guide rods are uniformly distributed on the semi-circles of the upper four-way butting flange and the lower four-way butting flange. And when the stable and reliable guiding function is ensured, enough space is reserved for the disassembly and assembly operation of the sealing steel ring.

The synchronous connecting rod is connected between the crank handles of the two hydraulic jacks, and the synchronous extension and retraction of the two hydraulic jacks can be realized when any crank handle or synchronous connecting rod is operated. On one hand, the synchronous extension and retraction of the two hydraulic jacks can be more accurately ensured; on the other hand, the operation is more convenient, and only one of the crank handles or the synchronous connecting rod needs to be operated.

Drawings

Fig. 1 is a schematic structural view of a specific embodiment of a christmas tree dismounting and maintenance tool according to the present invention in a use state;

FIG. 2 is a schematic structural view of the jacking unit of FIG. 1 with the jacking seat removed;

in the figure: 1-upper cross; 101-left production valve; 102-right production valve; 2-lower cross joint; 201-left sleeve valve; 202-right cannula valve; 3-a hydraulic jack; 301-a crank; 302-right angle chuck; 303-adjusting the screw; 304-external threads; 305-a telescopic rod; 307-a base; 308-a hydraulic cylinder; 309-oil return valve; 41-clamping slips; 411-internal screw threads; 412-external screw thread; 42-a transfer sleeve; 420-inner step; 421-large diameter section; 422-small diameter section; 5-top brace rod; 6-a top support seat; 7-a guide rod; 8-a nut; 9-synchronous link.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

The utility model discloses a production tree dismouting maintenance frock's concrete embodiment:

as shown in fig. 1, the christmas tree dismounting and maintenance tool comprises two sets of jacking units, wherein the two sets of jacking units are symmetrically arranged on two sides of central pipes of an upper cross 1 and a lower cross 2. The jacking unit comprises a hydraulic jack 3, the hydraulic jack 3 is an existing hydraulic jack and comprises a base 307, a hydraulic cylinder 308 is fixedly mounted on the base 307, a crank 301 and an oil return valve 309 are connected onto the hydraulic cylinder 308, an adjusting screw 303, namely a mandril, is screwed into a telescopic rod 305 of the hydraulic cylinder 308, the adjusting screw 303 and the telescopic rod 305 jointly form a linear output end of the hydraulic jack 3, the telescopic rod 305 extends outwards when the crank 301 is pressed downwards, and the telescopic rod 305 retracts inwards when the oil return valve 309 is opened.

The two-piece clamping slip 41 is fastened outside the adjusting screw 303 of the hydraulic jack 3, as shown in fig. 2, the inner wall surface of the two-piece clamping slip 41 is provided with an inner thread 411 which is fastened with the outer thread 304 on the adjusting screw 303, the outer wall surface of the two-piece clamping slip 41 is provided with an outer thread 412, when the two-piece clamping slip 41 is fastened outside the adjusting screw 303, the outer thread 412 on the two-piece clamping slip 41 forms a complete outer connecting thread, and the two-piece clamping slip 41 is just positioned between the top support block at the upper end of the adjusting screw and the upper end surface of the telescopic rod 305. Of course, the gripping slips 41 may be provided in three or four flaps, for example.

The adapter sleeve 42 is screwed outside the clamping slips 41, and the two clamping slips 41 are clamped on the adjusting screw 303 by the adapter sleeve 42. The adapter sleeve 42 is of a side opening structure and comprises a large-diameter section 421 and a small-diameter section 422, and an internal thread matched with an external connecting thread formed by the external threads 412 on the two-petal clamp slip 41 is arranged in the small-diameter section 422. The inner step 420 is arranged at the transition connection position of the large-diameter section 421 and the small-diameter section 422, when the adapter sleeve 42 is screwed, the adapter sleeve 42 will abut against the upper end of the clamping slip 41 after rotating for a period of time and cannot rotate continuously, and the screwing of the adapter sleeve 42 on the clamping slip 41 can be limited through the inner step 420, so that the adapter sleeve 42 and the clamping slip 41 are connected more reliably.

A top bracing structure is inserted in the adapter sleeve 42 and comprises a top bracing rod 5, the top bracing rod 5 is inserted in the large-diameter section 421 of the adapter sleeve 42 and is abutted against the inner step 420, a top bracing seat 6 is arranged above the top bracing rod 5, an insertion part extending downwards is arranged on the top bracing seat 6, the upper end of the top bracing rod 5 is inserted in the insertion part, and the upper surface of the top bracing seat 6 forms a top bracing surface matched with the top bracing of the production valve at the corresponding side of the upper cross 1. Compared with the mode that the top brace 5 is directly matched with the top brace of the production valve, the top brace seat 6 is in surface contact with the production valve, the top brace area is increased, and therefore the top brace is more reliable.

In consideration of the fact that potential safety hazards are possibly brought if the upper cross 1 obliquely topples when moving in the actual construction process, the Christmas tree dismounting and maintaining tool is also provided with a guide structure for guiding the upper cross 1 when moving up and down. The guide structure comprises three guide rods 7, the three guide rods 7 penetrate through corresponding flange connecting holes in the upper cross butt joint flange and the lower cross butt joint flange and are uniformly distributed on the semi-circles of the upper cross butt joint flange and the lower cross butt joint flange, and nuts 8 are respectively screwed at two ends of each guide rod 7. Set up like this and can guarantee reliable and stable guide effect, avoid the potential safety hazard when, reserve sufficient space for the dismouting operation of sealing steel ring, the sealing steel ring can be followed the position that does not install the semicircle of guide bar and is corresponded and take out and pack into, and is very convenient. Meanwhile, the flange connecting holes in the upper four-way joint flange and the lower four-way joint flange can be ensured to correspond up and down after the upper four-way joint 1 falls down, so that bolts can penetrate through the corresponding flange connecting holes to realize the butt joint of the upper four-way joint and the lower four-way joint.

When the upper cross 1 moves up and down, the two sets of jacking units are required to stretch out and draw back synchronously, so that the stability of the upper cross 1 in the moving process can be ensured, and potential safety hazards are avoided. In order to more accurately ensure the synchronous extension and retraction of the two sets of jacking units, a synchronous connecting rod 9 is further connected between the crank handles 301 of the two hydraulic jacks 3, the two crank handles 301 are respectively provided with a right-angle chuck 302, and two ends of the synchronous connecting rod 9 are respectively fixed with the two crank handles 301 relatively through the right-angle chucks 302. The crank 301 of one hydraulic jack 3 can be operated to drive the crank 301 of the other hydraulic jack 3 to synchronously rotate through the synchronous connecting rod 9, so that the two hydraulic jacks 3 can be synchronously stretched; the synchronous connecting rod 9 is operated to realize synchronous rotation of the crank handles 301 of the two hydraulic jacks 3, so that the two hydraulic jacks 3 can be synchronously stretched.

When the lifting device is used, firstly, two sets of lifting units are symmetrically arranged on two sides of the central pipes of the upper four-way joint 1 and the lower four-way joint 2, so that the lower ends of the two hydraulic jacks 3 are respectively and oppositely fixed with the left sleeve valve 201 and the right sleeve valve 202 of the lower four-way joint 2; then the extending lengths of the two hydraulic jacks 3 are respectively adjusted through the crank handles 301, so that the top bracing surfaces of the two top bracing structures are respectively propped on the left production valve 101 and the right production valve 102 of the upper four-way pipe 1, at the moment, the synchronous connecting rod 9 is connected between the crank handles 301 of the two hydraulic jacks 3, and the telescopic rods 305 of the two hydraulic jacks 3 are controlled to synchronously extend upwards by rotating the crank handle 301 of one of the hydraulic jacks 3 or operating the synchronous connecting rod 9; the upper cross 1 moves upwards under the action of the top supports of the two top support structures, and when the distance between the upper cross 1 and the lower cross 2 can meet the requirements of the taking-out and loading operations of the sealing steel ring, the upper cross 1 is kept at the current position, and the sealing steel ring is maintained and replaced; after the replacement or maintenance of the sealing steel ring is finished, the oil return valves 309 of the two hydraulic jacks 3 are opened simultaneously, the telescopic rods 305 of the two hydraulic jacks 3 synchronously retract downwards, the upper four-way joint 1 returns to the position in butt joint with the lower four-way joint 2, and bolts sequentially penetrate through corresponding flange connecting holes of the butt joint flanges of the upper four-way joint and the lower four-way joint to relatively fix the upper four-way joint and the lower four-way joint. The whole operation process only needs to operate the two sets of jacking units, so that the operation is convenient, the time and the labor are saved, and the maintenance cost is reduced.

In the above embodiments, the upper end of the jacking unit is a linear output end, and in other embodiments, the lower end of the jacking unit can also be a linear output end.

In the above embodiment, the jacking unit includes a hydraulic jack and a jacking structure, in other embodiments, the hydraulic jack may also be replaced by a pneumatic telescopic cylinder, a screw nut mechanism and other driving mechanisms capable of outputting linear motions, if the distance that the linear output end of the driving mechanism can stretch is long enough, the jacking structure may not be provided, and the linear output end of the driving mechanism directly jacks the left and right production valves of the upper cross.

In the above embodiment, the split clamping slips are buckled outside the ejector rod of the hydraulic jack, the adapter sleeve is screwed outside the clamping slips, and the jacking structure is connected with the adapter sleeve in an inserting manner so as to realize relative fixation with the upper end of the hydraulic jack. In other embodiments, the top bracing structure can also be in threaded connection with the adapter sleeve; the jacking structure can be directly and relatively fixed with the upper end of the hydraulic jack, and particularly, the jacking structure can be directly sleeved on the outer side of the ejector rod of the hydraulic jack, so that an inner step in the jacking structure is in jacking fit with the upper part of the ejector rod of the hydraulic jack in the up-down direction; or, the lower end of the jacking structure is provided with a blind hole with a downward opening, so that the bottom of the blind hole is in pushing fit with the upper part of the ejector rod of the hydraulic jack in the up-down direction.

In the above embodiments, the adapter sleeve includes a large diameter section and a small diameter section, and in other embodiments, the adapter sleeve may also be a sleeve body with the same diameter at each part.

In the above embodiment, the top bracing structure comprises the top bracing rod and the top bracing seat, the upper end of the top bracing rod is inserted into the top bracing seat, and the top bracing is performed on the production valve on the corresponding side of the upper four-way valve through the top bracing seat, so that the top bracing area can be increased, and the top bracing is more reliable. Of course, in other embodiments, the upper end of the top brace rod may also be connected with the top brace seat by welding or the top brace rod may be screwed on the top brace seat; the top bracing seat can also not be arranged, the top bracing can be directly carried out through the top bracing rod, at the moment, if the top bracing area is required to be increased, the base can also be arranged at the bottom of the production valve at the corresponding side of the upper cross, and the top bracing rod can be used for carrying out top bracing on the upper cross through the base.

The main objective that sets up guide structure is to going up the cross when reciprocating to lead, avoids going up the cross and takes place the incline to empty and bring the potential safety hazard, does not do the injecive to the concrete quantity of guide bar, for example, in other embodiments, the guide bar can also be established to two, four, five etc. and the arrangement mode of guide bar should guarantee that sealed steel ring can take out smoothly and pack into in order to avoid the potential safety hazard.

The main purpose of setting up synchronous connecting rod is in order to more accurate assurance two sets of jacking units's synchronous flexible, improves the operation security, in other embodiments, also can not set up synchronous connecting rod.

Claims

1. The utility model provides a production tree dismouting maintenance frock, characterized by includes:

the two sets of jacking units are respectively provided with a linear output end, synchronously extend and retract when in use, are symmetrically arranged on two sides of the central pipes of the upper four-way and the lower four-way, the lower ends of the jacking units are respectively used for being relatively fixed with the left sleeve valve and the right sleeve valve of the lower four-way, and the upper ends of the jacking units are respectively used for being matched with the left production valve jacking strut and the right production valve jacking strut of the upper;

the guide structure comprises at least two guide rods, and is used for penetrating into corresponding flange connecting holes of the upper cross butt joint flange and the lower cross butt joint flange up and down, so that the upper cross is prevented from inclining and toppling when being jacked to move upwards.

2. The Christmas tree disassembly and assembly maintenance tool of claim 1, wherein the jacking unit comprises a hydraulic jack and a top bracing structure, the lower end of the top bracing structure is fixed at the upper end of the hydraulic jack, and the upper end of the top bracing structure is used for bracing a corresponding side production valve of the upper four-way valve.

3. The Christmas tree dismounting and maintaining tool according to claim 2, wherein the jacking structure is fixedly connected with the upper end of the hydraulic jack through a connecting structure, the connecting structure comprises at least two clamping slips, inner wall surfaces of the clamping slips are provided with inner threads which are buckled with outer threads on a mandril of the hydraulic jack, outer wall surfaces of the clamping slips are provided with outer threads, when the clamping slips are buckled on the outer side of the mandril of the hydraulic jack, the outer threads form complete outer connecting threads, the connecting structure further comprises an adapter sleeve which is screwed on the outer connecting threads, and the jacking structure is connected with the adapter sleeve.

4. The Christmas tree dismounting and maintaining tool according to claim 3, wherein the top bracing structure is connected with the adapter sleeve in a plug-in mounting manner.

5. The Christmas tree dismounting and repairing tool according to claim 4, wherein the adapter sleeve comprises a large-diameter section and a small-diameter section, internal threads screwed with external connecting threads are arranged in the small-diameter section, an inner step is arranged at the transition connection position of the large-diameter section and the small-diameter section, and the top support structure is inserted in the large-diameter section and is abutted against the inner step.

6. The Christmas tree disassembly and assembly maintenance tool of any one of claims 2 to 5, wherein the top bracing structure comprises a top bracing rod and a top bracing seat arranged at the upper end of the top bracing rod, the lower end of the top bracing rod is fixed at the upper end of the hydraulic jack, and the top bracing seat is provided with a top bracing surface used for being matched with the top bracing of the production valve at the corresponding side of the upper four-way valve.

7. The Christmas tree dismounting and repairing tool according to any one of claims 1 to 5, wherein three guide rods are provided, and the three guide rods are uniformly distributed on the semi-circles of the upper and lower four-way butting flanges.

8. The Christmas tree dismounting and repairing tool according to any one of claims 2 to 5, wherein a synchronous connecting rod is connected between the cranks of the two hydraulic jacks, and the two hydraulic jacks can be synchronously stretched when any one crank or synchronous connecting rod is operated.