CN111021973B - Collecting ball type adapter and installation method thereof - Google Patents
Collecting ball type adapter and installation method thereof Download PDFInfo
- Publication number
- CN111021973B CN111021973B CN201911311439.5A CN201911311439A CN111021973B CN 111021973 B CN111021973 B CN 111021973B CN 201911311439 A CN201911311439 A CN 201911311439A CN 111021973 B CN111021973 B CN 111021973B
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- bridge plug
- ball seat
- ball
- lower connecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009434 installation Methods 0.000 title abstract description 6
- 210000000078 claw Anatomy 0.000 claims abstract description 25
- 238000010008 shearing Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- 238000005086 pumping Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
Abstract
The invention discloses a collecting ball type adapter and an installation method thereof, wherein the collecting ball type adapter comprises an outer push cylinder, an upper connecting rod, a lower connecting rod, a spring, a baffle ring, a collecting claw and a sliding rod; the push cylinder is matched with the corresponding end of the ball seat or the bridge plug; the upper ends of the upper connecting rod and the outer cylinder are respectively connected with the corresponding ends of the central rod and the outer cylinder of the setting tool through threads; the lower connecting rod is connected with the ball seat or the bridge plug through shear nails or threads; the baffle ring is arranged at the lower section of the spring and is positioned between the upper connecting rod and the lower connecting rod; the collecting claw is arranged on the lower connecting rod; the slide bar is symmetrically connected with the collecting claw and is arranged at the upper end of the collecting claw. After the ball seat or the bridge plug is operated, the seal checking operation is carried out under the condition that the ball seat or the bridge plug perforation linkage tool does not go out of the well, so that a means is provided for verifying the working state of the ball seat or the bridge plug. After the ball seat or the bridge plug fails to seal, perforation operation is not performed, damage to the casing after perforation is avoided, and good wellbore conditions are provided for secondary ball seat or bridge plug operation.
Description
[ field of technology ]
The invention belongs to the technical field of oil and gas field transformation, and relates to a collecting ball type adapter and an installation method thereof.
[ background Art ]
Currently, the staged fracturing of the horizontal well of the tight oil and gas reservoir mainly adopts a hydraulic pumping ball seat or bridge plug fracturing process, and the ball seat or bridge plug mainly adopts a ball throwing type and has an inner drift diameter with a certain size.
The hydraulic pumping ball seat or bridge plug fracturing process mainly comprises the following steps: the tool string is connected by adopting a cable to connect the lower ball seat or bridge plug and the multi-cluster perforating gun, the adapter is connected with the setting tool and the ball seat or bridge plug, the straight well section is lowered by means of the self weight of the tool string, and the hydraulic pumping mode of the ground pump group is adopted to continue to be lowered until the straight well section reaches the deflecting section. The ground controls the setting ball seat or bridge plug, and is separated from the multi-cluster perforating gun, the multi-cluster perforating gun is lifted and dragged upwards to complete multi-cluster perforation, and then the tool string in the well is started. And delivering the soluble ball on the ground, adopting a hydraulic pumping fracturing ball to reach the position of a ball seat or a bridge plug, completing the packer casing, performing the fracturing construction of the optical casing, and sequentially completing the subsequent well section construction from bottom to top. After the pressure, the ball seat or bridge plug is removed and the wellbore fluid passage is restored. If a soluble ball seat or bridge plug is used, the downhole conditions after pressing reach a soluble ball seat or bridge plug dissolution condition, the soluble ball seat or bridge plug is dissolved and the wellbore fluid passage is restored.
The process has higher performance requirements on the ball seat or the bridge plug of the key tool, if the sealing effect of the ball seat or the bridge plug cannot meet the construction requirements, the follow-up construction cannot be carried out, the well bore is required to be treated, and after a well bore fluid channel is established, the ball seat or the bridge plug is carried out again until the sealing effect of the ball seat or the bridge plug completely meets the construction requirements. However, in this case, the perforation operation is performed, so that the borehole or the perforation well section sleeve is deformed on the inner wall of the sleeve, the incomplete sleeve such as the sleeve burr or the diameter change is easily generated, and the sealing surface of the ball seat or the bridge plug or other structural parts are easily damaged during the secondary ball seat or the bridge plug operation, so that the secondary ball seat or the bridge plug operation fails. At present, the horizontal well ball injection type ball seat or bridge plug perforation combined operation process is mature, but the process has certain limitation in implementation. Therefore, there is a need to invent an effective ball-collecting adapter in combination with the process features of the ball seat or bridge plug perforation and the setting tool, ball seat or bridge plug structure and operational features.
[ invention ]
The invention aims to solve the problem that the implementation of a horizontal well ball throwing ball seat or bridge plug perforation combined operation process still has a certain limitation in the prior art, and provides a ball collecting adapter and an installation method thereof. The invention solves the problem of perforation operation after timely verifying the tightness of the ball seat or the bridge plug after the ball seat or the bridge plug is set. Meanwhile, when the ball seat or the bridge plug is in an incomplete sealing condition, a larger fluid channel is established, so that necessary conditions are provided for the secondary pumping bridge plug.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a ball-and-socket type of collection adapter comprising:
the inner wall of the push cylinder is provided with a reducing step surface; the outer pushing cylinder is matched with the corresponding end of the ball seat or the bridge plug;
the upper ends of the upper connecting rod and the outer cylinder are respectively connected with the corresponding ends of the central rod and the outer cylinder of the setting tool through threads;
the lower connecting rod is connected with the ball seat or the bridge plug through shear pins or threads; slide rails are symmetrically arranged on the lower connecting rod;
the spring is arranged at the lower part of the upper connecting rod;
the baffle ring is arranged at the lower section of the spring and is positioned between the upper connecting rod and the lower connecting rod;
the collecting claw is arranged on the lower connecting rod;
the sliding rod is symmetrically connected with the collecting claw and is arranged at the upper end of the collecting claw.
The invention is further improved in that:
the shearing force of the baffle ring is more than 30% of the hand loss force of the ball seat or the bridge plug.
The two ends of the sliding rod are fixed by nuts and limited in the sliding rail of the lower connecting rod to slide freely.
The upper connecting rod is connected with the lower connecting rod through threads, and the spring and the baffle ring are limited.
A method of installing a ball-and-socket adapter, comprising the steps of:
step 1: the upper end of the push-out cylinder is connected with the outer cylinder of the setting tool by adopting threads;
step 2: installing the spring at the lower end of the upper connecting rod;
step 3: placing a baffle ring at the lower section of the spring; the upper connecting rod and the lower connecting rod are connected by adopting threads until the spring is compressed in place;
step 4: the collecting claws are symmetrically arranged at the track of the lower connecting rod, the corresponding collecting claws are symmetrically connected by adopting a sliding rod, and two ends of the sliding rod are fixed by nuts;
step 5: the upper end of the upper connecting rod is connected with the central rod of the setting tool by adopting threads;
step 6: placing a fracturing ball at a ball seat or a built-in ball seat of a bridge plug;
step 7: the lower section of the lower connecting rod is connected with the ball seat or the bridge plug by adopting shear pins or threads;
step 8: and adjusting the relative positions of the push cylinder and the corresponding end of the bridge plug by fastening and loosening until the requirements are met.
Compared with the prior art, the invention has the following beneficial effects:
firstly, after the ball seat or the bridge plug is operated, the seal checking operation is carried out under the condition that the perforation of the ball seat or the bridge plug is not carried out and the perforation linkage tool of the ball seat or the bridge plug is not carried out, so that a means is provided for verifying the working state of the ball seat or the bridge plug. And secondly, after the ball seat or the bridge plug is operated, the ball seat or the bridge plug is anchored reliably, the sealing is incomplete, the fracturing ball can be collected, a fluid channel in a shaft is opened, and a larger fluid channel is provided for the operation of the secondary ball seat or the bridge plug. Finally, after the ball seat or the bridge plug fails to seal, perforation operation is not performed, damage to the casing after perforation is avoided, and good wellbore conditions are provided for secondary ball seat or bridge plug operation.
[ description of the drawings ]
FIG. 1 is a schematic side view of an initial state of a ball-and-socket adapter of the present invention;
FIG. 2 is a schematic side view of the ball-and-socket adapter of the present invention after completion of the setting of the ball-and-socket or bridge plug;
FIG. 3 is a schematic side view of the ball-on-ball adapter of the present invention capturing a frac ball;
FIG. 4 is a side view of the lower link of the present invention;
FIG. 5 is a schematic side view of a shear ring of the present invention.
In the figure: 1-an outer pushing cylinder, 2-an upper connecting rod, 3-a spring, 4-a baffle ring, 5-a lower connecting rod, 6-a collecting claw and 7-a sliding rod.
[ detailed description ] of the invention
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the accompanying drawings. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present therebetween. In addition, if one layer/element is located "on" another layer/element in one orientation, that layer/element may be located "under" the other layer/element when the orientation is turned.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the collecting ball type adapter of the invention comprises an outer push cylinder 1, an upper connecting rod 2, a spring 3, a baffle ring 4, a lower connecting rod 5, a collecting claw 6 and a sliding rod 7. The outer push cylinder 1 is provided with a reducing step surface. The upper ends of the outer pushing cylinder 1 and the upper connecting rod 2 are respectively connected with the corresponding ends of the outer cylinder and the central rod of the setting tool by adopting threads. The push cylinder 1 is matched with the corresponding end of the ball seat or the bridge plug, and the lower connecting rod 5 is connected with the ball seat or the bridge plug by adopting shear pins or threads. The outer push cylinder 1 is provided with a reducing step surface. The spring 3 is arranged at the lower part of the upper connecting rod 2. The baffle ring 4 is arranged at the lower section of the spring 3 and is positioned between the upper connecting rod 2 and the lower connecting rod 5; the shearing force of the baffle ring 4 is more than 30% of the hand loss force of the ball seat or the bridge plug. The collecting claw 6 is mounted on the lower connecting rod 5. And sliding rails are symmetrically arranged on the lower connecting rod 5. The sliding rod 7 is symmetrically connected with the collecting claw 6, the sliding rod 7 is arranged at the upper end of the collecting claw 6, and two ends of the sliding rod 7 are fixed by nuts and limited to freely slide in the sliding rail of the lower connecting rod 5. The upper connecting rod 2 and the lower connecting rod 5 are connected through threads, and limit the spring 3 and the baffle ring 4.
The invention relates to an installation method of a collecting ball type adapter, which comprises the following steps:
step 1: the upper end of the push cylinder 1 is connected with the outer cylinder of the setting tool by adopting threads.
Step 2: a spring 3 is installed at the lower end of the upper connecting rod 2.
Step 3: a baffle ring 4 is placed at the lower section of the spring 3. The upper and lower connecting rods are connected by screw threads until the spring 3 is compressed in place.
Step 4: the collecting claws 6 are symmetrically arranged at the track of the lower connecting rod 5, the corresponding collecting claws 6 are symmetrically connected by adopting the sliding rods 7, and the two ends of the sliding rods 7 are fixed by nuts.
Step 5: the upper end of the upper connecting rod 2 is connected with the central rod of the setting tool by adopting threads.
Step 6: the fracturing ball is placed at a ball seat or a built-in ball seat of a bridge plug.
Step 7: the lower section of the lower connecting rod 5 is connected with the ball seat or the bridge plug by adopting shear pins or threads.
Step 8: and the relative positions of the push cylinder 1 and the corresponding end of the bridge plug are adjusted through fastening and loosening until the requirements are met.
The working principle and the process of the invention are as follows:
the ball seat or bridge plug perforation linkage tool enters the well bore and reaches the designed position. And (3) starting to set the ball seat or the bridge plug through ground control, and when the releasing force generated by the setting tool reaches the setting force of the ball seat or the bridge plug, setting the ball seat or the bridge plug on the inner wall of the sleeve and separating from the setting tool. At this time, the initiating explosive device in the setting tool continues to burn slowly, the setting tool continues to work, the outer cylinder of the setting tool and the central rod continue to generate relative displacement, and the outer cylinder 1 of the ball seat or the bridge plug operation adapter connected with the setting tool and the upper and lower connecting rods also continue to generate relative displacement until the reducing step surface of the outer cylinder 1 contacts with the baffle ring 4. The initiating explosive device in the setting tool still burns slowly, the outer pushing cylinder 1 and the upper and lower connecting rods continue to generate relative displacement until the reducing step surface of the outer pushing cylinder 1 infers the shearing surface of the baffle ring 4, the spring 3 is released, the spring 3 pushes the collecting claw 6 to move downwards until the spring 3 is reset, and the collecting claw 6 extends out of the lower end surface of the outer pushing cylinder 1. Complete the whole mechanical actions of setting.
The string of string tools is lifted up to a distance. And pumping fluid into the shaft by adopting a ground pump set, and testing the pressure of the bridge plug. If the bridge plug pressure test is not qualified, the perforation operation is not performed, the pumping of the bridge plug perforation linkage tool string is continued until the collecting claw 6 enters the bridge plug ball seat, the fracturing ball is collected, and the bridge plug perforation tool string is started. And (5) re-carrying out perforating combined operation of the ball seat or the bridge plug until the ball seat or the bridge plug is qualified in pressure test. And after the pressure test is qualified, carrying out subsequent operations such as perforation, reservoir transformation and the like.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (3)
1. A ball-and-socket type of collection adapter, comprising:
the device comprises an outer pushing cylinder (1), wherein a reducing step surface is arranged on the inner wall of the outer pushing cylinder (1); the outer pushing cylinder (1) is matched with the corresponding end of the ball seat or the bridge plug;
the upper ends of the upper connecting rod (2) and the outer cylinder (1) are respectively connected with the corresponding ends of the central rod and the outer cylinder of the setting tool through threads;
the lower connecting rod (5) is connected with the ball seat or the bridge plug through a shear pin or threads; slide rails are symmetrically arranged on the lower connecting rod (5);
a spring (3), wherein the spring (3) is arranged at the lower part of the upper connecting rod (2);
the baffle ring (4) is arranged at the lower section of the spring (3) and is positioned between the upper connecting rod (2) and the lower connecting rod (5); the shearing force of the baffle ring (4) is more than 30% of the hand loss force of the ball seat or the bridge plug;
a collecting claw (6), wherein the collecting claw (6) is arranged on the lower connecting rod (5);
the sliding rod (7) is symmetrically connected with the collecting claw (6) and is arranged at the upper end of the collecting claw (6); the two ends of the sliding rod (7) are fixed by nuts and limited to freely slide in the sliding rail of the lower connecting rod (5).
2. The ball-and-socket adaptor according to claim 1, wherein the upper connecting rod (2) and the lower connecting rod (5) are connected by means of threads, limiting the spring (3) and the stop ring (4).
3. A method of installing a ball-and-socket adapter according to claim 1, comprising the steps of:
step 1: the upper end of the push cylinder (1) is connected with the outer cylinder of the setting tool by adopting threads;
step 2: the spring (3) is arranged at the lower end of the upper connecting rod (2);
step 3: the baffle ring (4) is arranged at the lower section of the spring (3); the upper connecting rod and the lower connecting rod are connected by adopting threads until the spring (3) is compressed in place;
step 4: the collecting claws (6) are symmetrically arranged at the track of the lower connecting rod (5), the corresponding collecting claws (6) are symmetrically connected by adopting sliding rods (7), and two ends of the sliding rods (7) are fixed by nuts;
step 5: the upper end of the upper connecting rod (2) is connected with the central rod of the setting tool by adopting threads;
step 6: placing a fracturing ball at a ball seat or a built-in ball seat of a bridge plug;
step 7: the lower section of the lower connecting rod (5) is connected with the ball seat or the bridge plug by adopting shear pins or threads;
step 8: and adjusting the relative positions of the push cylinder (1) and the corresponding end of the bridge plug through fastening and loosening until the requirements are met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311439.5A CN111021973B (en) | 2019-12-18 | 2019-12-18 | Collecting ball type adapter and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311439.5A CN111021973B (en) | 2019-12-18 | 2019-12-18 | Collecting ball type adapter and installation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111021973A CN111021973A (en) | 2020-04-17 |
| CN111021973B true CN111021973B (en) | 2023-10-31 |
Family
ID=70210697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911311439.5A Active CN111021973B (en) | 2019-12-18 | 2019-12-18 | Collecting ball type adapter and installation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111021973B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111021973A (en) | 2020-04-17 |
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