CN209799935U - Large-curvature well sand control screen pipe - Google Patents
Large-curvature well sand control screen pipe Download PDFInfo
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- CN209799935U CN209799935U CN201920320280.2U CN201920320280U CN209799935U CN 209799935 U CN209799935 U CN 209799935U CN 201920320280 U CN201920320280 U CN 201920320280U CN 209799935 U CN209799935 U CN 209799935U
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Abstract
A sand control screen pipe suitable for a large-curvature well hole comprises an upper joint, a coupling, a ball seat, a ball head, a slotted pipe and a slot or a hole; the method is characterized in that: the ball seat is connected with the ball head through a coupling, the ball seat is connected with the ball head through threads, the ball seat at the lower end of the upper joint is the same as the curvature radius of the arc surface of the ball head, after the threads are connected, the centers of the two arc surfaces coincide to form a universal joint structure, the ball head can freely and flexibly move along the ball seat, the ball head is bent in a range of 8-16 degrees in a unilateral mode, the lower portion of the ball head is connected with a slotted pipe through threads, the slotted pipe is provided with slots or holes, and the multistage sand control screen pipes are connected through threads to form a flexible sand control screen pipe string. The utility model can be freely bent in a three-dimensional axis well with large curvature, thereby ensuring that a well completion pipe column is smoothly put in and avoiding the blocking phenomenon; the slotted pipe can effectively prevent sand; the drift diameter in the flexible sieve tube is large, sand washing operation can be carried out after the sand is produced from the stratum, and the operation cost for replacing the sieve tube is reduced.
Description
Technical Field
The utility model relates to a well drilling, well completion engineering technical field, especially big camber well completion technology are applicable to the bore hole sand control completion of big camber well, are big camber well sand control screen pipe particularly.
Background
At present, most old oil fields in China enter the middle and later stages of development, the pressure coefficient of a main force block is lower and lower, the exploitation economy is poorer and poorer by adopting the traditional drilling mode, and the ultra-short radius side drilling technology for simultaneously exploiting a plurality of layer series in the same well is one of the production increasing means with higher economy in the current oil exploitation.
According to the difference of curvature radius, the radial horizontal well is divided into a long radius well, a middle radius well, a short radius well and an ultra-short radius well. And the horizontal well with the curvature radius smaller than 20 meters is an ultra-short radius horizontal well. Wells with shorter radii of curvature are more difficult to drill and have higher requirements on the drilling tool and the completion process.
In the prior art, drilling tools are mainly classified into two categories, namely jet flow tools and flexible drilling tools. A company in the United states has a technology for breaking rock and drilling by using high-pressure rotary jet, a horizontal well drilled by using the jet has a small borehole diameter, and due to the fact that channels cut by water flow are irregular, the horizontal well cannot be well-cemented and completed, and the channels are easy to close due to the fact that supports are lost. Based on the jet injection principle, the Chinese invention patent ZL2009200123400 discloses a high-pressure water jet injection combined tool which comprises an injection main body and a well completion auxiliary part, wherein the injection main body comprises a nozzle, a high-pressure pipe and the like, and also comprises a slotted flexible sieve pipe which is sleeved outside the high-pressure pipe, a drilling tool is lifted after the injection is carried out to the designed well depth, and the slotted flexible sieve pipe and a sand control sieve are both retained in a well hole formed by injection, so that well completion is realized. The following problems exist with this completion method: the slots of the slotted flexible sieve tube are perpendicular to the drilling direction of a well hole and are not regular circular arcs, so that the slots are often scraped with the well wall in a large area in the process of going into the well, and the whole set of combined tool cannot advance smoothly.
Chinese patent (ZL 2011201003600) discloses a special guiding flexible sieve tube for drilling and completion, and mainly solves the problems that an existing flexible drill rod is poor in guiding performance and easy to damage. The technical scheme is as follows: the special guiding flexible screen pipe for drilling and completion comprises a pipe body. The pipe body wall is uniformly provided with T-shaped openings, T-shaped plugging blocks are arranged in the T-shaped openings, the head ends of the T-shaped plugging blocks are welded and fixed on the T-shaped openings, the tail ends of the T-shaped plugging blocks are fixed through a bundling plate, the pipe body wall at the tail ends of the T-shaped openings is radially provided with radial slots, and the two ends of the slots are axially provided with axial slots. The flexible drilling pipe is matched with the flexible drilling pipe during drilling, the flexible drilling pipe can be protected, and after completion, the special guide flexible screen pipe for drilling and completing can be left in a well and used for supporting a well wall. The flexible screen pipe has the following problems:Due to the limitation of the pipe body structure of the flexible sieve pipe, the sieve pipe string can be bent only in one direction, is only suitable for a borehole with a two-dimensional axis, is easy to block in a borehole with a three-dimensional axis and is difficult to drop to a preset well depth;Screen pipe slot only for protecting flexible drilling tool and supporting open holeThe well wall can not effectively prevent sand for loose sandstone oil reservoirs.
chinese patent ZL201110123478X discloses a compound drilling and completion tool with ultra-short radius and high pressure water jet and its process, wherein the compound completion tool adopts the structural form of a slotted sand control screen, a coupling is arranged on the tail pipe of the slotted sand control screen, a slotted pipe and an angle limiting sheet are arranged in the slotted sand control screen, the slotted sand control screen is connected with a sand control screen through a pressing sleeve, and a guide shoe is arranged at the front end of the slotted sand control screen. The completion screen string is run into the wellbore trajectory drilled for ultra-short radius horizontal drilling, which can support the formation while it collapses and prevent formation sand from entering the casing. As can be seen from fig. 2 of the patent, the slotted pipe arranged in the slotted sand control screen pipe has a similar structure to the flexible guide screen pipe disclosed in chinese patent No. (ZL 2011201003600), and also adopts a T-shaped opening structure, so that the risk of easy blockage in a three-dimensional axis borehole also exists.
Disclosure of Invention
The utility model aims at providing a sand control screen pipe in big curvature well can go into the well that ultrashort curvature radius drilling formed down, can support the wall of a well and can effective sand control after the well completion, and can freely bend at the income in-process of the serious three-dimensional axis well of dog leg, avoids the card to hinder the risk.
The technical solution of the utility model is that:
A sand control screen pipe suitable for a large-curvature well hole comprises an upper joint, a ball seat, a coupling, a ball head, a slotted pipe and a slot or a hole; the method is characterized in that: the lower end of the upper joint is provided with a ball seat, the ball seat is matched with the ball head, the ball seat is in threaded connection with the ball head through a coupling, the lower end ball seat of the upper joint is identical to the curvature radius of the circular arc surface of the ball head, after the threaded connection, the centers of spheres of the two circular arc surfaces coincide, a universal joint structure is formed, the ball head can freely and flexibly move along the ball seat, the bending range of the ball head is 8-16 degrees, the lower portion of the ball head is connected with a slotted pipe through threads, the slotted pipe is provided with slots or holes, the multistage sand control screen pipes are in threaded connection, and the flexible sand control screen pipe string suitable for the.
The upper part of the upper joint of the sand control screen pipe suitable for the large-curvature well is provided with an oil pipe internal thread, and the lower part of the upper joint is provided with a common thread.
The coupling of the sand control screen pipe suitable for the large-curvature well is provided with common threads at the upper part and a spherical crown concentric with the ball seat at the lower part.
The lower part of the ball head of the sand control screen pipe suitable for the large-curvature well is provided with common threads.
The upper part of the slotted pipe of the sand control screen pipe suitable for the large-curvature well is provided with common threads to be matched with the lower part of the ball head, the lower part of the slotted pipe is provided with oil pipe external threads to be matched with the oil pipe internal threads on the upper part of the upper joint, and the rotary surface of the slotted pipe is uniformly provided with the slotted holes.
Holes are uniformly distributed on the revolution surface of the slotted pipe of the sand control screen pipe suitable for the large-curvature well.
The rotary surface of the slotted pipe of the sand control screen pipe suitable for the large-curvature well is provided with the slots and the holes at intervals.
Above-mentioned slotted pipe length of sand control screen pipe suitable for big camber well can carry out optimal design according to the curvature radius and the well bore size of going into the well bore, guarantees to go into predetermined well bore smoothly in the bending angle scope of screen pipe nipple joint, and multistage sand control screen pipe can be used according to the length free combination of going into the well bore.
Compared with the prior art, the utility model has the advantages of it is following:the sieve tube is provided with a ball joint universal joint structure, can be freely bent in a three-dimensional axis well bore with large curvature, ensures that a well completion pipe column is smoothly put in, and avoids the blocking phenomenon;The slotted pipe of the sieve pipe is designed into a slotted or perforated pattern according to the median of the granularity of the formation sand, so that the sand can be effectively prevented;The drift diameter in the sieve tube is large, and after the sand is produced from the stratumThe sand washing operation can be carried out, and the operation cost for replacing the sieve tube is reduced; the high-curvature well wall sand prevention device has the advantages of reasonable design, reliable working performance, capability of smoothly running into a high-curvature well, capability of supporting the open hole well wall, preventing collapse of the well, capability of effectively preventing sand, and good use effect and application value.
Drawings
FIG. 1-the utility model discloses a main view semi-section structure sketch map
FIG. 2-the utility model discloses well completion tubular column structure sketch map is used in pit
In the figure, 1, an upper joint, 2, a ball seat, 3, a coupling, 4, a ball head, 5, a slotted pipe, 6, a slotted hole or a hole, 7, a flexible sand control screen pipe, 8, a large-curvature well hole, 9, a tail pipe hanger and 10, a guide shoe.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings, without limiting the scope of the invention, and all modifications made by the design idea of the present invention fall into the scope of the invention.
as shown in figure 1, the sand control screen pipe suitable for the large-curvature well hole consists of an upper joint 1, a ball seat 2, a coupling 3, a ball head 4, a slotted pipe 5 and a slot or a hole 6; the method is characterized in that: the utility model discloses a flexible sand control screen pipe string, including top connection 1, ball seat 2, ball head 4, coupling 3, ball seat 2 and ball head 4 threaded connection, the lower extreme ball seat 2 of top connection 1 is the same with 4 arc surface curvature radius of ball head, through threaded connection back, the centre of sphere coincidence of two arc surfaces, form the universal joint structure, ball head 4 can follow ball seat 2 freedom nimble motion, ball head 4 unilateral bending range 8 ~ 16, 1 lower part of ball head is passed through the screw thread and is connected with slotted pipe 5, be equipped with slot or hole 6 on the slotted pipe 5, multistage sand control screen pipe passes through threaded connection, constitute a flexible sand control screen pipe string suitable for the well of major curvature.
The upper part of the coupling 3 is provided with a common thread, and the lower part is provided with a spherical crown concentric with the ball seat 2.
The lower part of the ball head 4 is provided with common threads.
The upper part of the slotted pipe 5 is provided with common threads which are matched with the lower part of the ball head 4, the lower part of the slotted pipe is provided with oil pipe external threads which are matched with the oil pipe internal threads on the upper part of the upper joint 1, and slots and holes 6 are uniformly distributed on the revolution surface of the slotted pipe 5.
as shown in fig. 2, a sand control completion string structure is run in the large-curvature wellbore 8 (bottom-up): the guide shoe 10, the flexible sand control screen pipe 7 and the tail pipe hanger 9 are suspended in the upper casing pipe through the tail pipe hanger 9 after the guide shoe is lowered to the designed well depth.
Taking the ultra-short radius sidetrack horizontal well as an example, after the original well casing is windowed, the ultra-short radius drilling tool drills to the designed well depth, the drilling tool is taken out, the sand control completion pipe string is put in, and the structure from bottom to top is as follows: guide shoe 10+ flexible sand control screen pipe 7+ liner hanger 9, because the dog-leg degree of big camber well is great, when the well completion tubular column meets wall of a well lateral force, the bulb structure of flexible sand control screen pipe 7 can freely be crooked, according to the space shape of well axis, whole well completion tubular column can be crooked into the arbitrary shape in space, prevent to go into in-process jamming, guarantee that the well completion tubular column goes down to design well depth smoothly, down utilize the liner hanger 9 on tubular column upper portion to hang on former well casing behind the design well depth, realize the open hole sand control completion. In addition, taking a lateral drilling hole with the diameter of phi 100mm as an example, the maximum inner drift diameter of a well completion pipe string can reach phi 60mm, and if sand is produced in a stratum in the later production stage, a continuous oil pipe can be put in for sand washing operation.
Claims (7)
1. A sand control screen for use in a large curvature wellbore, comprising: the device comprises an upper joint (1), a ball seat (2), a coupling (3), a ball head (4), a slotted pipe (5) and a slot or hole (6); the method is characterized in that: the utility model discloses a flexible sand control screen pipe, including top connection (1), ball seat (2) and bulb (4), through coupling (3) with ball seat (2) and bulb (4) threaded connection, the lower extreme ball seat (2) of top connection (1) is the same with bulb (4) arc surface curvature radius, through threaded connection back, the centre of sphere coincidence of two arc surfaces, form the universal joint structure, ball seat (2) free nimble motion can be followed in bulb (4), bulb (4) unilateral bending range 8 ~ 16, bulb (4) lower part is passed through the screw thread and is connected with slot pipe (5), be equipped with slot or hole (6) on slot pipe (5), multistage sand control screen pipe passes through threaded connection, constitute flexible sand control screen pipe cluster.
2. the sand control screen for large curvature wellbores as claimed in claim 1, wherein: the upper part of the upper joint (1) is provided with an oil pipe internal thread, and the lower part of the upper joint is provided with a common thread.
3. The sand control screen for large curvature wellbores as claimed in claim 1, wherein: the upper part of the coupling (3) is provided with common threads, and the lower part of the coupling is provided with a spherical crown concentric with the ball seat (2).
4. The sand control screen for large curvature wellbores as claimed in claim 1, wherein: the lower part of the ball head (4) is provided with common threads.
5. The sand control screen for large curvature wellbores as claimed in claim 1, wherein: the upper part of the slotted pipe (5) is provided with common threads matched with the ball head (4), the lower part of the slotted pipe is provided with external threads of an oil pipe and matched with internal threads of the oil pipe at the upper part of the upper joint (1), and the rotary surface of the slotted pipe (5) is uniformly provided with slots (6).
6. The sand control screen for large curvature well bores as claimed in claim 1 or 5, wherein: holes (6) are uniformly distributed on the revolution surface of the slotted pipe (5).
7. The sand control screen for large curvature well bores as claimed in claim 1 or 5, wherein: the rotary surface of the slotted pipe (5) is provided with slots and holes (6) at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920320280.2U CN209799935U (en) | 2019-03-14 | 2019-03-14 | Large-curvature well sand control screen pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920320280.2U CN209799935U (en) | 2019-03-14 | 2019-03-14 | Large-curvature well sand control screen pipe |
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| Publication Number | Publication Date |
|---|---|
| CN209799935U true CN209799935U (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920320280.2U Active CN209799935U (en) | 2019-03-14 | 2019-03-14 | Large-curvature well sand control screen pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577216A (en) * | 2020-04-30 | 2020-08-25 | 天津金顺科技发展股份有限公司 | Sand control screen pipe with pipe body capable of being bent universally |
| CN113482533A (en) * | 2021-08-20 | 2021-10-08 | 大庆辰平钻井技术服务有限公司 | Completion system and completion method for ultra-short radius horizontal well universal perforated sieve tube |
-
2019
- 2019-03-14 CN CN201920320280.2U patent/CN209799935U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577216A (en) * | 2020-04-30 | 2020-08-25 | 天津金顺科技发展股份有限公司 | Sand control screen pipe with pipe body capable of being bent universally |
| CN113482533A (en) * | 2021-08-20 | 2021-10-08 | 大庆辰平钻井技术服务有限公司 | Completion system and completion method for ultra-short radius horizontal well universal perforated sieve tube |
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