CN215213419U - Sealing pressure testing tool for sand prevention packer - Google Patents
Sealing pressure testing tool for sand prevention packer Download PDFInfo
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- CN215213419U CN215213419U CN202121422043.0U CN202121422043U CN215213419U CN 215213419 U CN215213419 U CN 215213419U CN 202121422043 U CN202121422043 U CN 202121422043U CN 215213419 U CN215213419 U CN 215213419U
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Abstract
The utility model relates to a sealing pressure test tool of a sand prevention packer, a sand prevention packer is arranged in the inner cavity of a sealing barrel, and a rubber barrel of the sand prevention packer is seated in the sealing barrel; the lower end of the sealing cylinder is screwed with a sealing lower cover, and the center of the sealing lower cover is screwed with a pipe nozzle; the upper end of the sealing cylinder is screwed with a sealing upper cover, the center of the upper cover is inserted with a core pipe, the lower part of the core pipe is inserted into the inner wall of the cylinder body of the sand-proof packer, the circumference of the lower part of the core pipe is provided with a core pipe boss, a core pipe sealing ring is embedded on the circumferential wall of the core pipe boss to realize sealing with the inner wall of the cylinder body of the sand-proof packer, and the lower port of the core pipe is screwed with a core pipe sealing cover; a plurality of spacer rings are stacked on the upper shoulder of the core pipe boss, the spacer rings are sleeved on the periphery of the core pipe and are in clearance fit with each other, and the top spacer ring abuts against the lower end face of the upper sealing cover; an upper cover discharge hole is arranged on the circumference of the upper sealing cover. The pressure testing tool can test the pressure-bearing capacity of the upper part and the pressure-bearing capacity of the lower part of the rubber cylinder of the sand control packer respectively and test the setting pressure-bearing performance of the sand control packer.
Description
Technical Field
The utility model relates to a sand control packer, in particular to sand control packer seals pressure testing instrument belongs to sand control test tool technical field in the pit.
Background
Loose sandstone oil and gas reservoirs have serious sand production problems, and necessary sand prevention measures must be taken in the production process. The sand control technology of the sieve tube is widely applied as a simple and effective sand control mode, and most of sand control pipe columns are sand control packers for hanging sand control sieve tubes.
In a common sand-proof oil well, the packer rubber sleeve plays a sealing role, formation sand outside the sieve tube is prevented from entering the sieve tube, and the pressure-bearing function of the rubber sleeve is not required, so that the sand-proof packer does not have a seal checking function. For special sand control of oil and gas wells, such as gas storage, and the like, the sealing pressure of the special sand control needs to be detected due to the requirement of long service life, incapability of working midway and the like, and no special tool exists at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that exists among the prior art, provide a sand control packer seals pressure testing instrument, can test respectively subaerial packing element upper portion bearing capacity and the lower part bearing capacity to sand control packer, the seat of inspection sand control packer seals bearing capacity, guarantees the validity of packer long-term production in sand control well.
In order to solve the technical problem, the utility model discloses a sand control packer seals pressure testing instrument, including a sealing barrel, the inner chamber of sealing barrel embeds there is the sand control packer, the barrel periphery of sand control packer sits and seals at the inner wall of sealing barrel through the packing element; the lower end of the sealing cylinder is screwed with a lower sealing cover, a pressure gauge is arranged on the circumferential wall of the sealing cylinder close to the lower sealing cover through a joint, and a pipe nozzle extending downwards is screwed in a central screw hole of the lower sealing cover; the upper end of a sealed section of thick bamboo has connect sealed upper cover soon, the center of sealed upper cover is equipped with the upper cover centre bore, it has connect the core pipe to peg graft in the upper cover centre bore, the lower part of core pipe inserts the barrel inner wall of sand control packer, be equipped with core pipe boss on the lower part circumference of core pipe, be equipped with at least one core pipe seal groove on the circumference wall of core pipe boss, it has the core pipe sealing washer to inlay in the core pipe seal groove with sand control packer's barrel inner wall realizes sealedly, the lower port of core pipe has connect the sealed lid of core pipe soon.
As an improvement of the utility model, a plurality of spacing rings are superposed on the upper shoulder of the core tube boss, each spacing ring is sleeved on the periphery of the core tube and is in clearance fit with the core tube boss, and the top spacing ring is abutted against the lower end face of the upper sealing cover; and the circumference of the upper sealing cover is provided with an upper cover drainage hole which is axially communicated, and the diameter of the circumference where the axis of the upper cover drainage hole is positioned is larger than the outer diameter of the spacer ring.
As a further improvement of the utility model, the sand control packer positively sits and seals the inner wall of a sealing cylinder.
As a further improvement of the utility model, the sand control packer is inverted and is set on the inner wall of the sealing barrel.
As a further improvement, the lower end periphery of the sealing cylinder is embedded with a lower sealing ring of the sealing cylinder, and the lower sealing ring of the sealing cylinder is compressed on the inner wall of the lower sealing cover.
As a further improvement, the upper end periphery of the sealing cylinder is embedded with an upper sealing ring of the sealing cylinder, and the upper sealing ring of the sealing cylinder is pressed against the inner wall of the upper sealing cover.
As a further improvement, the inner wall of the lower part of the central screw hole of the lower sealing cover is embedded with a lower sealing ring, and the lower sealing ring is pressed against the outer wall of the nozzle.
As a further improvement of the utility model, the upper cover discharge hole is in evenly be equipped with four on the circumference of sealed upper cover.
Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 1. and (4) releasing pressure by the pressure test pump, wherein the highest pressure value read by the pressure gauge is the maximum sealing pressure of the sand prevention packer. Or the inner cavity of the sealing barrel is pressurized to the rated pressure, the change of the pressure value is observed within a specified time, and if the downward floating of the pressure value does not exceed the specified value, the sealing reliability of the sand control packer is judged.
2. The number of the spacer rings superposed on the core tube boss can adjust the insertion depth of the core tube in the sand prevention packer, so that the core tube sealing ring on the periphery of the core tube boss is sealed on the first part below the rubber sleeve, and the sealing of the inner cavity of the sand prevention packer is ensured.
3. The lower sealing ring of the sealing cylinder realizes the sealing between the sealing cylinder and the lower sealing cover, the upper sealing ring of the sealing cylinder realizes the sealing between the sealing cylinder and the upper sealing cover, and the lower sealing ring realizes the sealing between the nozzle and the lower sealing cover.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
Fig. 1 is the utility model discloses sand control packer seals cross-sectional view before the work of pressure testing instrument.
Fig. 2 is a front view of the core tube of the present invention.
Fig. 3 is a front view of the middle sealing cover of the present invention.
Fig. 4 is a top view of fig. 3.
Fig. 5 is the utility model discloses carry out the experimental state diagram of lower part pressure-bearing to sand control packer.
Fig. 6 is the utility model discloses carry out the experimental state diagram of upper portion pressure-bearing to sand control packer.
In the figure: 1. a sealing cylinder; 1a, sealing rings on the sealing cylinders; 1b, sealing a lower sealing ring of the sealing cylinder; 2. sealing the upper cover; 2a, an upper cover central hole; 2b, an upper cover drainage hole; 3. a core tube; 3a, a core tube boss; 3b, a core tube sealing ring; 4. the core tube is sealed and covered; 5. a spacer ring; 6. sealing the lower cover; 6a, a lower cover sealing ring; 7. a nozzle; 8. a sand prevention packer; 8a, a rubber cylinder; 9. and a pressure gauge.
Detailed Description
As shown in fig. 1 to 5, the sealing pressure test tool for the sand control packer of the present invention comprises a sealing cylinder 1, a sand control packer 8 is arranged in an inner cavity of the sealing cylinder 1, and the periphery of a cylinder body of the sand control packer 8 is seated on the inner wall of the sealing cylinder 1 through a rubber cylinder 8 a; the lower end of the sealing cylinder 1 is screwed with a sealing lower cover 6, a pressure gauge 9 is arranged on the circumferential wall of the sealing cylinder 1 close to the sealing lower cover 6 through a joint, and a nozzle 7 extending downwards is screwed in a central screw hole of the sealing lower cover 6; the upper end of the sealing cylinder 1 is screwed with a sealing upper cover 2, the center of the sealing upper cover 2 is provided with an upper cover central hole 2a, a core pipe 3 is inserted in the upper cover central hole 2a, the lower part of the core pipe 3 is inserted into the inner wall of the cylinder body of the sand prevention packer 8, the circumference of the lower part of the core pipe 3 is provided with a core pipe boss 3a, the circumferential wall of the core pipe boss 3a is provided with at least one core pipe sealing groove, a core pipe sealing ring 3b is embedded in the core pipe sealing groove to realize sealing with the inner wall of the cylinder body of the sand prevention packer 8, and the lower port of the core pipe 3 is screwed with a core pipe sealing cover 4; a plurality of spacer rings 5 are stacked on the upper shoulder of the core tube boss 3a, each spacer ring 5 is sleeved on the periphery of the core tube 3 and is in clearance fit with the periphery of the core tube, and the top spacer ring abuts against the lower end face of the upper sealing cover 2; an upper cover discharge hole 2b which is axially communicated is arranged on the circumference of the upper sealing cover 2, and the diameter of the circumference where the axis of the upper cover discharge hole 2b is positioned is larger than the outer diameter of the spacer ring 5.
The upper cover drain holes 2b may be uniformly provided in four on the circumference of the sealing upper cover 2.
The upper cover drain hole 2b can release the leaked clean water, and pressure build-up on the other side of the rubber cylinder 8a is avoided.
The periphery of the lower end of the sealing cylinder 1 is embedded with a lower sealing cylinder sealing ring 1b, and the lower sealing cylinder sealing ring 1b is tightly pressed on the inner wall of the lower sealing cover 6, so that the sealing between the sealing cylinder 1 and the lower sealing cover 6 is realized.
The periphery of the upper end of the sealing cylinder 1 is embedded with an upper sealing ring 1a of the sealing cylinder, and the upper sealing ring 1a of the sealing cylinder is tightly pressed on the inner wall of the upper sealing cover 2, so that the sealing between the sealing cylinder 1 and the upper sealing cover 2 is realized.
And a lower cover sealing ring 6a is embedded in the lower inner wall of the central screw hole of the lower sealing cover, and the lower cover sealing ring 6a is tightly pressed on the outer wall of the nozzle 7, so that the sealing between the nozzle 7 and the lower sealing cover 6 is realized.
A rubber sleeve 8a of the sand prevention packer 8 is set on the inner wall of the sealing barrel 1, and the setting condition of the sand prevention packer 8 in the well is simulated; the core tube sealing ring 3b and the core tube sealing cover 4 on the periphery of the core tube boss 3a seal the inner space of the sand prevention packer 8. The lower end of the pipe nozzle 7 is connected with a pressure test pump, clean water is injected through the pipe nozzle 7, and when the inner cavity of the sealing cylinder below the rubber cylinder 8a is filled with the clean water, the pressure is increased. And pumping clear water continuously for pressurization until the rubber sleeve 8a can not bear the pressure, leaking the clear water into the upper part from the periphery of the rubber sleeve 8a and discharging the clear water from the upper cover drainage hole 2b, and releasing the pressure of the pressure test pump, wherein the highest pressure value read by the pressure gauge 9 is the maximum sealing pressure of the sand control packer 8. Or the inner cavity of the sealing barrel is pressurized to the rated pressure, the change of the pressure value is observed within a specified time, and if the downward floating of the pressure value does not exceed the specified value, the sealing reliability of the sand control packer 8 is judged.
The number of 5 spacer rings superposed on the core tube boss 3a can adjust the insertion depth of the core tube 3 in the sand prevention packer 8, so that the core tube sealing ring 3b on the periphery of the core tube boss 3a is sealed on the first part below the rubber sleeve 8a, and the sealing of the inner cavity of the sand prevention packer 8 is ensured.
As shown in fig. 5, the sand control packer 8 is positively set on the inner wall of the sealing cylinder 1, and the pressure bearing capacity of the lower cavity of the rubber cylinder 8a can be tested.
As shown in figure 6, the sand control packer 8 is inversely set on the inner wall of the sealing cylinder 1, and the pressure bearing capacity of the upper cavity of the rubber cylinder 8a can be tested.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.
Claims (8)
1. The utility model provides a sand control packer seals pressure testing instrument, includes sealed section of thick bamboo, its characterized in that: a sand prevention packer is arranged in the inner cavity of the sealing barrel, and the periphery of the barrel body of the sand prevention packer is seated and sealed on the inner wall of the sealing barrel through a rubber barrel; the lower end of the sealing cylinder is screwed with a lower sealing cover, a pressure gauge is arranged on the circumferential wall of the sealing cylinder close to the lower sealing cover through a joint, and a pipe nozzle extending downwards is screwed in a central screw hole of the lower sealing cover; the upper end of a sealed section of thick bamboo has connect sealed upper cover soon, the center of sealed upper cover is equipped with the upper cover centre bore, it has connect the core pipe to peg graft in the upper cover centre bore, the lower part of core pipe inserts the barrel inner wall of sand control packer, be equipped with core pipe boss on the lower part circumference of core pipe, be equipped with at least one core pipe seal groove on the circumference wall of core pipe boss, it has the core pipe sealing washer to inlay in the core pipe seal groove with sand control packer's barrel inner wall realizes sealedly, the lower port of core pipe has connect the sealed lid of core pipe soon.
2. The sand control packer sealing pressure testing tool according to claim 1, characterized in that: a plurality of spacer rings are stacked on the upper shoulder of the core pipe boss, the spacer rings are sleeved on the periphery of the core pipe and are in clearance fit with each other, and the top spacer ring abuts against the lower end face of the upper sealing cover; and the circumference of the upper sealing cover is provided with an upper cover drainage hole which is axially communicated, and the diameter of the circumference where the axis of the upper cover drainage hole is positioned is larger than the outer diameter of the spacer ring.
3. The sand control packer sealing pressure testing tool according to claim 1, characterized in that: the sand prevention packer is positively set on the inner wall of the sealing barrel.
4. The sand control packer sealing pressure testing tool according to claim 1, characterized in that: the sand prevention packer is inversely set on the inner wall of the sealing barrel.
5. The sand control packer sealing pressure testing tool according to claim 1, characterized in that: and a lower sealing ring of the sealing cylinder is embedded in the periphery of the lower end of the sealing cylinder and tightly pressed on the inner wall of the lower sealing cover.
6. The sand control packer sealing pressure testing tool according to claim 1, characterized in that: and an upper sealing ring of the sealing cylinder is embedded on the periphery of the upper end of the sealing cylinder and tightly pressed on the inner wall of the upper sealing cover.
7. The sand control packer sealing pressure testing tool according to claim 1, characterized in that: and a lower cover sealing ring is embedded in the inner wall of the lower part of the central screw hole of the lower sealing cover and tightly pressed on the outer wall of the nozzle.
8. The sand control packer sealing pressure testing tool according to claim 2, characterized in that: four upper cover discharge holes are uniformly formed in the circumference of the sealing upper cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121422043.0U CN215213419U (en) | 2021-06-25 | 2021-06-25 | Sealing pressure testing tool for sand prevention packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121422043.0U CN215213419U (en) | 2021-06-25 | 2021-06-25 | Sealing pressure testing tool for sand prevention packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215213419U true CN215213419U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121422043.0U Active CN215213419U (en) | 2021-06-25 | 2021-06-25 | Sealing pressure testing tool for sand prevention packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215213419U (en) |
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2021
- 2021-06-25 CN CN202121422043.0U patent/CN215213419U/en active Active
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