CN214787285U - A special fishing tool for salvaging tree under water - Google Patents
A special fishing tool for salvaging tree under water Download PDFInfo
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- CN214787285U CN214787285U CN202120514723.9U CN202120514723U CN214787285U CN 214787285 U CN214787285 U CN 214787285U CN 202120514723 U CN202120514723 U CN 202120514723U CN 214787285 U CN214787285 U CN 214787285U
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- pawl
- fishing
- fishing tool
- tool
- assembly
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Abstract
The utility model discloses a special fishing tool for salvaging trees under water, include: an upper joint; one end of the outer cylinder assembly is fixedly connected with the other end of the upper joint; at least four windows which are respectively symmetrically arranged at the other end of the outer cylinder assembly; one end of the pawl is in splined connection with the other end of the outer barrel assembly, and at least four pawl heads are symmetrically arranged at the other end of the pawl; and the positioning sleeve is coaxially and fixedly arranged inside the pawl. The fishing tool can be unlocked and lifted by pressing down and rotating the fishing tool, and partial tools are fished when the condition occurs underground, so that the fishing success rate is improved. The utility model has simple structure, easy processing and assembly and relatively easy maintenance; the field operation is simple, and the structure is safe and reliable; the tensile strength of the tool is high, and the fishing claw is locked in the lifting process; the operation is simple, safe and reliable, and the requirement of back-off operation when an underground accident occurs can be met.
Description
Technical Field
The utility model relates to a special fishing tool for salvaging trees under water belongs to borehole operation instrument field.
Background
In the process of oil field development, according to the requirements of oil field regulation, modification, perfection and excavation and diving and according to the technological design requirements, a set of ground and underground equipment and tools are utilized to take various underground technical measures for oil and water wells, so that the purposes of increasing injection and production quantity, improving oil layer seepage conditions and oil and water well technical conditions and increasing existing speed and final recovery rate are achieved, and the series of underground construction process technologies are collectively called as 'underground operation'.
The conventional commonly used fishing barrel needs to be taken out from the well bottom and put in another tool again for fishing, the labor intensity of workers is high, the price of the fishing barrel is high, the construction efficiency is low, the fishing cost is high, and the fishing success rate is low; in addition, the tools are various, so that the storage, selection and transportation are inconvenient.
The special fishing tool is an indispensable auxiliary tool for downhole operation, the lifting and releasing type retractable fishing barrel is a special fishing tool for fishing downhole test trees in the sleeve, if the fished underwater test trees are blocked, fishing operation is difficult to realize, any jarring tool is not needed, the clamping and lifting can be realized only by pressing and rotating the sleeve tool, and partial tools can be fished when conditions occur in the well.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a developed a special fishing tool for salvaging trees under water, just can unfreeze, lift the instrument through pushing down this fishing tool of rotation, salvage partial instrument when the situation appears in the pit, improve and salvage the success rate.
The utility model provides a technical scheme does:
a special fishing tool for fishing underwater trees, comprising:
an upper joint;
one end of the outer cylinder assembly is fixedly connected with the other end of the upper joint;
at least four windows which are respectively symmetrically arranged at the other end of the outer cylinder assembly;
one end of the pawl is in splined connection with the other end of the outer barrel assembly, and at least four pawl heads are symmetrically arranged at the other end of the pawl;
and the positioning sleeve is coaxially and fixedly arranged inside the pawl.
Preferably, the upper joint comprises successively arranged in sequence:
one end of the first connecting part is connected with the operation pipe column;
an intermediate portion having one end connected to the other end of the first connection portion, the intermediate portion having a cross-sectional area larger than that of the first connection portion;
and one end of the second connecting part is connected with the middle part, and the other end of the second connecting part is fixedly connected with the outer cylinder assembly.
Preferably, the other end of the second connecting portion has a tapered structure.
Preferably, the other end of the second connecting part has an internal thread, and the outer cylinder has an external thread at one end and is fittingly disposed at the internal thread.
Preferably, an internal spline is arranged inside the other end of the outer cylinder along the circumferential direction, and an external spline is arranged at one end of the pawl and is arranged at the internal spline in a matching mode.
Preferably, the number of the windows and the number of the pawl heads are the same, and the windows and the pawl heads are four.
Beneficial effect:
1) the structure is simple, the processing and the assembly are easy, and the maintenance is relatively easy;
2) the field operation is simple, and the structure is safe and reliable;
3) the tensile strength of the tool is high, and the fishing claw is locked in the lifting process;
4) the utility model discloses novel structure, easy to process and assembly, easy operation and safe and reliable can satisfy the back-off operation demand when the accident in the pit appears.
Drawings
Fig. 1 is a schematic sectional view of the special fishing tool for fishing underwater trees according to the present invention.
Fig. 2 is a B-B sectional view of the special fishing tool for fishing underwater trees according to the present invention.
Fig. 3 is a C-C sectional view of the special fishing tool for fishing underwater trees according to the present invention.
Fig. 4 is a schematic structural view of the pawl assembly of the special tool for salvaging underwater trees of the present invention.
FIG. 5 is a schematic structural view of the special fishing tool for fishing underwater trees of the present invention connecting with the fishing joint.
Fig. 6 is a schematic structural view of the outer barrel assembly of the special fishing tool for fishing underwater trees according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in FIGS. 1-6, the utility model provides a special fishing tool for salvaging trees under water, include: upper fitting 110, outer barrel assembly 120, and pawl assembly 130.
As shown in fig. 1 and 5, one end of the upper joint 110 is connected to a tool string through a crossover joint, the other end is connected to one end of the outer cylinder assembly 120, and the other end of the outer cylinder assembly 120 is fixedly connected to one end of the pawl assembly 130, so as to form a special fishing tool, which can fish down the downhole tools when the conditions occur downhole.
Both ends of the upper joint 110 have a screw structure, one end of the upper joint 110 is connected to the tool string through a switching structure, and the other end of the upper joint 110 has an external screw. The top connection includes that in proper order sets up in succession: the hydraulic pipe comprises a first connecting portion, an intermediate portion and a second connecting portion, wherein one end of the first connecting portion is connected with the operation pipe column through a conversion joint, the other end of the first connecting portion is connected with one end of the intermediate portion, the cross-sectional area of the intermediate portion is larger than that of the first connecting portion, the other end of the intermediate portion is connected with one end of the second connecting portion, the other end of the second connecting portion is provided with an external thread structure, the inner portion of the second connecting portion is provided with an inner conical structure, and the cross-sectional area is gradually reduced towards the direction of the intermediate portion.
One end of the outer cylinder assembly 120 is provided with an internal thread structure, and is matched with and arranged at the external thread of the second connecting part, on the outer cylinder assembly, the other end close to the outer cylinder assembly 120 is provided with at least four windows 121 along the circumferential direction, in the outer cylinder assembly 120, the inner wall of the outer cylinder assembly is provided with four internal splines 122, the internal splines 122 are fixed on the cylinder wall of the outer cylinder assembly 120 through screws 123, one end of each screw 123 is welded with the outer wall of the outer cylinder assembly 120, and the condition that tools fail caused by the looseness of the screws 123 can be avoided.
In the present invention, the number of the windows is preferably four.
The pawl assembly 130 includes: the pawl 131 and the positioning sleeve 132, the pawl 131 is provided with an external spline which is matched with an internal spline on the outer cylinder assembly 120, so that the pawl assembly 130 is connected with the outer cylinder assembly through the spline. On pawl 131, the symmetry is provided with four at least pawl heads the utility model discloses in, as an optimization, the quantity of pawl head is four, and wherein, the pawl head that two symmetries set up is provided with relative eave tile, and two other are no eave tile structure, and pawl assembly 130 is inside fixed to be provided with position sleeve 132.
When the underwater test tree needs to be fished, the fishing barrel is put into the well, when the fishing barrel is contacted with the underwater test tree, the pawl assembly trolley 130 of the fishing barrel is jacked by the underwater test tree to move upwards, the pawl assembly 130 is jacked by the upper connector 110 when running to the end face of the other end of the upper connector 110, the fishing barrel is continuously pressed downwards, the pawl 131 outwards expands through the window 121 on the outer barrel assembly 120, the inner hole of the pawl 131 is tangent to the excircle of one end part of the underwater test tree, then the fishing barrel is continuously pressed downwards, the positioning sleeve 132 of the pawl assembly 130 is positioned by one end part of the underwater test tree, then the fishing barrel is rotated rightwards, the pawl 131 enters the groove of one end part of the underwater test tree, the fishing barrel is lifted upwards, the pawl assembly is pulled downwards, the inner cone of the pawl assembly runs to the cone face of the other end of the outer barrel, the outer cone face of the pawl assembly is tangent to the cone face of the outer barrel assembly, and the fishing barrel is continuously lifted upwards, the inner conical surface of the outer cylinder assembly can enable the pawl assembly to inwardly converge until limiting, and complete locking is achieved. The internal splines 122 of the outer barrel assembly 120 have a certain positioning function on the axial direction of the pawl assembly, when the inner conical surface of the outer barrel assembly 120 deforms, the internal splines 122 can limit the pawl assembly again, the pawl assembly 130 is prevented from being disengaged from the fishing barrel, and the effect of twice safety is achieved.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (6)
1. A special fishing tool for salvaging underwater trees, comprising:
an upper joint;
one end of the outer cylinder assembly is fixedly connected with the other end of the upper joint;
at least four windows which are respectively symmetrically arranged at the other end of the outer cylinder assembly;
one end of the pawl is in splined connection with the other end of the outer barrel assembly, and at least four pawl heads are symmetrically arranged at the other end of the pawl;
and the positioning sleeve is coaxially and fixedly arranged inside the pawl.
2. A special fishing tool for fishing underwater trees as claimed in claim 1, wherein the upper joint comprises successively arranged in sequence:
one end of the first connecting part is connected with the operation pipe column;
an intermediate portion having one end connected to the other end of the first connection portion, the intermediate portion having a cross-sectional area larger than that of the first connection portion;
and one end of the second connecting part is connected with the middle part, and the other end of the second connecting part is fixedly connected with the outer cylinder assembly.
3. A special fishing tool for fishing underwater trees as claimed in claim 2, wherein the other end of the second connection section is internally of a tapered configuration.
4. A special fishing tool for fishing underwater trees as claimed in claim 3, wherein the second connection section has an internal thread at the other end thereof, and the outer barrel has an external thread at one end thereof and is matingly disposed at the internal thread.
5. A special fishing tool for fishing underwater trees as claimed in claim 4, wherein the other end of the outer barrel is provided with internal splines along the circumferential direction, and one end of the pawl is provided with external splines and is matched with the internal splines.
6. A special fishing tool for fishing underwater trees as claimed in claim 5, wherein the fenestrations and the ratchet heads are the same number, four each.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120514723.9U CN214787285U (en) | 2021-03-11 | 2021-03-11 | A special fishing tool for salvaging tree under water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120514723.9U CN214787285U (en) | 2021-03-11 | 2021-03-11 | A special fishing tool for salvaging tree under water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214787285U true CN214787285U (en) | 2021-11-19 |
Family
ID=78664833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120514723.9U Active CN214787285U (en) | 2021-03-11 | 2021-03-11 | A special fishing tool for salvaging tree under water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214787285U (en) |
-
2021
- 2021-03-11 CN CN202120514723.9U patent/CN214787285U/en active Active
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