CN201202412Y - Expansion screwed joint for expansion screen tube - Google Patents
Expansion screwed joint for expansion screen tube Download PDFInfo
- Publication number
- CN201202412Y CN201202412Y CNU2008200189013U CN200820018901U CN201202412Y CN 201202412 Y CN201202412 Y CN 201202412Y CN U2008200189013 U CNU2008200189013 U CN U2008200189013U CN 200820018901 U CN200820018901 U CN 200820018901U CN 201202412 Y CN201202412 Y CN 201202412Y
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- threads
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- button
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Abstract
The utility model aims at providing an expansible thread connector capable of being used for connecting expandable sand control screen pipes for sites, which is formed from a male button and a female button which are matched with each other, wherein the female button is manufactured into a step-like cylindrical structure, an annular protective section is manufactured on the front end, threads are manufactured on the middle portions of the male button and the female button, annular inserting parts and annular matching grooves are manufactured on both ends of the threads, slotted holes are homogeneously arranged on the male button and the female button, a V-shaped groove is manufactured on the slotted hole on the thread part of the male part, matching screwed holes which are fixedly connected through a screw bolt are manufactured on the male button and the female button, and the thread connector and a screen pipe are connected into a whole through welding. The utility model has the advantages that the axial expanding of threads is limited through the limited matching between the annular inserting parts and the annular matching grooves, and the deformation and the tripping of the threads are prevented during the expanding, slots are homogeneously cut on the threads, and the V-shaped groove is manufactured on the slotted hole on the thread part of the male button, the expanding force is reduced, and the mutual matching of the threads is convenient, the thread connector is fixedly connected through adopting the screw bolt, and the rotating of the screen pipe and the free moving of the threads are prevented.
Description
Technical field
The utility model is the expansion screw joint that a kind of expandable sand control screen pipe that is applicable to fields such as oil drilling completion, sand control repairing is used, and belongs to the technical field that is threaded.
Background technology
Sand production is that loose sand oil accumulation is exploited ubiquitous problem, and the harm of shaking out mainly shows influences the oil well ordinary production, increase cost of production, destroy aspects such as stratum, contaminated environment.
Traditional sand-preventing process is a cost with the sacrificial section production capacity mostly.Gravel pack completion easily produces depth-type filtration, causes screen casing to stop up, and influences output, and its implement complexity, expense are higher; Sand control techniques such as wire-wrapped screen, cutting seam sieve tube, metal wool screen casing, TBS screen casing have successively appearred in the mechanical sand control field, these screen casings are easy to install, low price, its shortcoming is in unconsolidated formation, easily in the annular space of screen casing and sleeve pipe, form silt particle cake layer, stop up the oil impregnate passage, the sand control ability; Owing to there is the sand ring, during the screen casing fishing, easy stuck screen casing causes overhaul, increases task difficulty and cost.
Along with the arrival of oil field development middle and later periods, special well increases year by year, and the completion of horizontal well, multilateral well, sidetracked hole and sand control are comparatively difficult.Therefore researching and developing sand control installation and the technology that sand controlling result is good, operating cost is low has been very necessary.
The expandable screen sand control technique is with in the screen insertion well, makes it that radial plastic deformation take place with bloat tool, realizes a kind of technology that expands, the back outer wall that expands is close to the borehole wall, realize the job requirements of " nullring sky ", improve sand controlling result greatly, prolong screen casing application life.Because when expandable screen expanded with bloat tool, the junction of screw connection structure radial dimension also took place becomes big, if adopt regular screw threads to connect, mechanical performance reduces greatly after the dilatancy, can not satisfy working condition requirement.Therefore, the expansion screw joint of the novel expandable screen special use of research has crucial technology and economic implications.
Summary of the invention
Permanent plastic deformation radially can take place in expandable sand control screen pipe, the purpose of increase the screen casing internal diameter to reach, optimizing casing programme, thus significantly reduce sand control treatment expense few and oil well production cost and raising oil well productivity.The purpose of this utility model is to provide a kind of expansion screw joint that expandable sand control screen pipe connects that can be used for to the scene.
The utility model is to realize like this.The expansion screw joint is cooperatively interacted by pin thread and box and constitutes, box is processed as stair-stepping cylindrical structure, front end is processed with a ring protection section, pin thread and box middle part are processed with screw thread, screw thread adopts the reverse hook teeth structure, the screw thread two ends are processed with annular Plug Division and annular mating groove, and annular Plug Division is embedded in the annular mating groove when threaded engagement is good, play the protection screw thread; By the slot pattern of the mutual overlap joint slot that evenly distributes, and on the slot of pin thread threaded portion, be processed with v shape groove on pin thread and the box,, be convenient to screw thread and cooperatively interact to remove the burr that slot produces; Be processed with screw at screen casing pin thread and box, and be fastenedly connected, prevent that screen casing from arbitrarily rotating and the free activity of screw thread by bolt; Nipple is connected as a single entity by welding and screen casing.
Advantage of the present utility model is:
(1) restriction by axial annular mating groove and annular Plug Division cooperates, the annular Plug Division at internal and external threads two ends all is inserted in the annular mating groove, clamping mutually, the axial expansion of restriction internal and external threads, prevent the enlarging after internal and external threads distortion when screen expansion, disengagement and internal thread expand, guaranteed the smooth integrality of expansion rear thread.
(2) by the slot pattern of mutual overlap joint screen casing is carried out slot, reduce expansion force, make the screen casing screw thread be easy to expand; Form complete sand control screen after expanding, make screen casing not have clear band.
(3) evenly distribution is staggered on the screw thread screw thread stitches, and is processed with v shape groove on the slot of pin thread threaded portion, removes the burr that produces because of slot, is convenient to screw thread and cooperatively interacts.
(4) after screw thread cooperatively interacted and connects, nipple adopted bolt and screw to be fastenedly connected, and prevented the free activity of the random rotation between screen casing and screw thread in the work progress.
(5) the box end front end has a ring protection section, and the diameter of protection section is greater than screen casing body diameter, and the spacing between protection section and screen casing body just in time is the thickness of required filter medium, protection screen casing nipple.
Description of drawings
The inflatable screen casing of Fig. 1 structural representation of expansion screw joint.
Fig. 2 left side figure is the pin thread schematic diagram, and right figure is a pin thread screw thread A-A sectional view.
Fig. 3 box schematic diagram.
1 pin thread, 2 boxes, 3 screw threads, 4 slots, 5 annular mating groove 6 annular Plug Division 7 bolts, 8 screws, 9 ring protection sections, 10 v shape grooves
The specific embodiment
Now the utility model will be further described in conjunction with Figure of description.
As shown in Figure 1, adjacent expandable screen link has external screw thread and internal thread respectively, is with externally threaded pin thread 1 to be inserted in the tapped box 2, and internal and external threads is combined together, and finishes the connection of screen casing.
As Fig. 2, shown in Figure 3, on pin thread 1 and the box 2 all the slot pattern by mutual overlap joint carry out slot, and on the slot 4 of pin thread 1 thread segment 3, be processed with v shape groove 10, remove the burr that produces because of slot, be convenient to screw thread 3 and cooperatively interact; Simultaneously reduce expansion force yet, make screen casing screw thread 3 be easy to expand, screen casing does not have clear band, and the back of expanding forms complete sand control screen, thereby increases filter area, improves the sand controlling result of screen casing.
As Fig. 1, Fig. 2, shown in Figure 3, all 2 axial annular mating grooves 5 and annular Plug Division 6 in the pin thread 1 of expansion screw joint and box 2, its annular Plug Division 6 is embedded in the annular mating groove 5, as shown in Figure 1 when screw thread 3 is worked good just.The degree of depth of annular Plug Division 6 can design according to the nipple needs, can not deviate from annular mating groove 5 with the annular Plug Division 6 that guarantees screw thread 3 two ends in the expansion process.When screen casing expands under the bloat tool effect, nipple generation radial plastic deformation, because the cooperation of annular mating groove 5 and annular Plug Division 6, the axial expansion of restriction internal and external threads 3, prevent the enlarging after internal and external threads 3 distortion when screen expansion, disengagement and internal thread expand, guaranteed expansion rear thread 3 smooth integralities.
Shown in Fig. 1,3; one section ring protection section 9 of box 2 front ends processing; the diameter of ring protection section 9 is greater than screen casing body diameter; after the nipple cooperation is intact; spacing between ring protection section 9 and screen casing body just in time is the thickness of required filter medium; joint is damaged before and after preventing to expand, with protection screen casing nipple.
As shown in Figure 1, after screw thread 3 cooperatively interacted and connects, nipple adopted bolt 7 and screw 8 to be fastenedly connected, and prevented the free movable of the random rotation between screen casing and screw thread 3 in the work progress.
Nipple is connected as a single entity by welding and screen casing, and bloat tool realization screen casing and screw thread 3 expansions, and after the expansion, screw thread 3 cooperates intact, has good tension and anti-twisting property.
Claims (2)
1. expansion screw joint that is used for expandable screen, it is cooperatively interacted by pin thread [1] and box [2] and constitutes, it is characterized in that: box [2] is processed as stair-stepping cylindrical structure, front end is processed with a ring protection section [9], pin thread [1] and box [2] middle part are processed with screw thread [3], screw thread [3] two ends are processed with annular Plug Division [6] and annular mating groove [5], pin thread [1] and box [2] are gone up slot pattern by the mutual overlap joint slot [4] that evenly distributes, and are processed with v shape groove [10] on the slot [4] of pin thread [1] threaded portion; Be processed with the screw [8] of cooperation on screen casing pin thread [1] and box [2], be fastenedly connected by bolt [7], pin thread [1] and box [2] are connected as a single entity by welding and screen casing.
2. a kind of expansion screw joint that is used for expandable screen as claimed in claim 1 is characterized in that: annular mating groove [5] and annular Plug Division [6] are shaped as trapezoidal shape, and annular mating groove [5] and annular Plug Division [6] cooperatively interact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200189013U CN201202412Y (en) | 2008-11-13 | 2008-11-13 | Expansion screwed joint for expansion screen tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200189013U CN201202412Y (en) | 2008-11-13 | 2008-11-13 | Expansion screwed joint for expansion screen tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201202412Y true CN201202412Y (en) | 2009-03-04 |
Family
ID=40424726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200189013U Expired - Lifetime CN201202412Y (en) | 2008-11-13 | 2008-11-13 | Expansion screwed joint for expansion screen tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201202412Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100595A (en) * | 2017-06-01 | 2017-08-29 | 中国石油集团渤海钻探工程有限公司 | A kind of expandable sand control screen pipe |
| CN110760316A (en) * | 2019-10-29 | 2020-02-07 | 张家港宏昌钢板有限公司 | Method for repairing blowby guniting of coke oven brick gas duct |
-
2008
- 2008-11-13 CN CNU2008200189013U patent/CN201202412Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100595A (en) * | 2017-06-01 | 2017-08-29 | 中国石油集团渤海钻探工程有限公司 | A kind of expandable sand control screen pipe |
| CN107100595B (en) * | 2017-06-01 | 2018-12-25 | 中国石油集团渤海钻探工程有限公司 | A kind of expandable sand control screen pipe |
| CN110760316A (en) * | 2019-10-29 | 2020-02-07 | 张家港宏昌钢板有限公司 | Method for repairing blowby guniting of coke oven brick gas duct |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM + CHEMICAL VICTORY OIL ENGINEERING Effective date: 20150701 Owner name: SINOPEC OILFIELD SERVICE CORPORATION Free format text: FORMER OWNER: WELL-DRILLING TECHNOLOGY INST., SHENGLI PETROLEUM ADMINISTRATION, SINOPEC Effective date: 20150701 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150701 Address after: 100029 Beijing Chaoyang District Hui Xin a No. twelve layer 6 Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: Drilling Well Technology Institute, Shengli Petroleum Engineering Co., Ltd., SINOPEC Address before: 257017 No. 236, North Road, Dongying District, Shandong, Dongying Patentee before: Well-Drilling Technology Inst., Shengli Petroleum Administration, SINOPEC |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090304 |
|
| CX01 | Expiry of patent term |