CN108240192B - Variable-diameter drift size gauge tool - Google Patents
Variable-diameter drift size gauge tool Download PDFInfo
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- CN108240192B CN108240192B CN201611217759.0A CN201611217759A CN108240192B CN 108240192 B CN108240192 B CN 108240192B CN 201611217759 A CN201611217759 A CN 201611217759A CN 108240192 B CN108240192 B CN 108240192B
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- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims 1
- 241000191291 Abies alba Species 0.000 abstract description 25
- 235000004507 Abies alba Nutrition 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- -1 burr Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
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Abstract
The invention discloses a variable-diameter drift size gauge tool, and belongs to the field of oil and gas well equipment. The drift size gauge tool comprises an upper joint and a cylindrical body, wherein the upper end of the cylindrical body is connected with the lower end of the upper joint, and the outer diameter of the cylindrical body is variable; when the cylindrical body is pressed downwards, the outer diameter of the cylindrical body is reduced; the outer diameter of the cylindrical body is maintained when the cylindrical body is not pressurized. The variable-diameter drift size gauge is not only suitable for an operating well with a wellhead Christmas tree of which the inner diameter is smaller than that of an oil pipe in a shaft, but also suitable for a full-drift-diameter operating well common in the field.
Description
Technical Field
The invention relates to the field of oil and gas well equipment, in particular to a variable-diameter drift size gauge tool.
Background
Along with the long-term exploitation of the oil well, the inner wall of the underground casing pipe can deform, the problem of reducing diameter occurs, subsequent oil extraction and well repair tools and production tools are blocked, and the normal production of the oil well is influenced. Also, various problems with the tools in the wellbore can occur, which can require workover measures. At the moment, the shaft needs to be subjected to drifting operation firstly to clean impurities such as oil, burrs on the inner wall of the casing, wax deposition, scaling and the like, so that subsequent casing deformation repairing operation or well repairing operation can be carried out smoothly. At present, the drift size gauge is mostly used for drifting operation, so that the drift size gauge is necessary to be provided.
The prior art provides such drift size indicator, including the tube-shape body, set up the top connection in this tube-shape body upper end, wherein, the top connection is used for being connected with supporting drift tubular column (for example steel wire operation tool), uses the tube-shape body to clear up impurity such as burr, wax precipitation, scale deposit on oil, the sleeve pipe inner wall.
The inventor finds that the prior art has at least the following problems:
the drift size gauge tool that prior art provided is applicable to drift class operation well, and is less to the internal diameter of well head production tree, and the great operation well of oil pipe internal diameter in the pit shaft (its drift has big-end-up's characteristics), in order to realize the drift function, the size of the tube-shape body of drift size gauge tool is confirmed according to the internal diameter of oil pipe, and this has just caused this drift size gauge tool can't transfer from well head production tree, leads to the drift operation to go on.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide the variable-diameter drift size gauge tool which is not only suitable for the full-drift type operation well, but also suitable for the operation well of which the inner diameter of a wellhead Christmas tree is smaller than that of an oil pipe in a shaft. The specific technical scheme is as follows:
a variable-diameter drift size gauge tool comprises an upper joint and a cylindrical body, wherein the upper end of the cylindrical body is connected with the lower end of the upper joint, and the outer diameter of the cylindrical body is variable;
when the cylindrical body is pressed downwards, the outer diameter of the cylindrical body is reduced;
the outer diameter of the cylindrical body is kept unchanged when the cylindrical body is not pressurized.
In particular, preferably, the drift size gauge further comprises a guide head;
the upper end of the guide head is connected with the lower end of the cylindrical body, and the lower end of the guide head is conical.
Specifically, preferably, the cylindrical body includes: the two ends of the outer sleeve are respectively connected with the upper joint and the guide head, and a plurality of longitudinal through grooves with preset lengths are uniformly formed in the wall of the outer sleeve along the circumferential direction;
the variable-diameter shaft is fixedly sleeved in the outer sleeve and comprises a large-diameter section and a small-diameter section which are sequentially connected from top to bottom;
the spring is sleeved on the small-diameter section of the reducing shaft, and the lower end of the spring is abutted to the upper end of the guide head;
the sliding blocks comprise sliding rail parts and well dredging parts which are sequentially connected, the sliding rail parts are in slidable contact with the reducing shaft in the outer sleeve, and the lower ends of the sliding rail parts are abutted against the upper end of the spring; the through-well part penetrates through the longitudinal through groove and extends out of the outer sleeve;
the sliding block moves up and down along the longitudinal through groove through the sliding rail part.
Specifically, preferably, the cylindrical body further includes a backing ring;
the backing ring is axially movably sleeved on the small-diameter section of the reducing shaft, the upper end of the backing ring is abutted against the lower end of the sliding rail part of the sliding block, and the lower end of the backing ring is connected with the upper end of the spring.
Specifically, preferably, the sliding block is a convex block body;
the upper convex part of the convex block body is used as the through well part of the sliding block, and the lower bottom of the convex block body is used as the sliding rail part of the sliding block;
and a limiting step is formed between the upper convex part and the lower bottom part and is used for preventing the sliding rail part from sliding out of the longitudinal through groove.
Specifically, preferably, the cylindrical body further comprises a plurality of arc-shaped limiting pieces;
the arc-shaped limiting pieces are fixed on the outer wall of the outer sleeve between every two adjacent longitudinal through grooves, and two sides of each arc-shaped limiting piece are in slidable contact with one side wall of the through-well part of the adjacent sliding block.
Specifically, preferably, the arc-shaped spacing pieces are fixed on the outer wall of the outer sleeve by using fastening screws.
Particularly, as a preferable mode, a circle of grooves are formed in the outer wall of the outer sleeve;
the arc-shaped limiting pieces and the longitudinal through grooves are arranged on the wall of the outer sleeve where the grooves are located.
Specifically, preferably, chamfers are arranged at the upper end and the lower end of the through-well part of the sliding block.
In particular, preferably, the upper portion of the guide head is provided with an axial blind groove for receiving the lower end of the small diameter section of the reducer shaft.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the variable-diameter drift size gauge tool provided by the embodiment of the invention is connected with a drift tubular column through an upper joint to lift and release; through setting the tube-shape body to the external diameter is changeable, when the internal diameter to the well head christmas tree is less than the operation well of the internal diameter of pit shaft internal oil pipe, at first can give the tube-shape body decurrent pressure manually, make its external diameter diminish to lower the well head christmas tree of less internal diameter with it under this state, treat through the great oil pipe of well head christmas tree entering internal diameter after, the tube-shape body will no longer receive decurrent pressure, its external diameter resumes the normal position and maintains unchanged this moment, can normally carry out the drifting operation. After the drifting operation is completed, the drifting pipe column is lifted up until the wellhead Christmas tree, at the moment, the outer diameter of the cylindrical body is larger than the inner diameter of the wellhead Christmas tree, and in the process of continuously lifting up, the wellhead Christmas tree gives downward pressure to the cylindrical body, so that the outer diameter of the wellhead Christmas tree is reduced, and the wellhead Christmas tree smoothly passes through the wellhead Christmas tree. Therefore, the variable-diameter drift size gauge provided by the embodiment of the invention effectively solves the problem that the drift size gauge of the operation well with the inner diameter of the wellhead Christmas tree smaller than the inner diameter of the oil pipe in the shaft is blocked, and is also suitable for the common full-drift-diameter operation well in the field.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a variable diameter drift size provided by an embodiment of the present invention;
figure 2 is a cross-sectional view of an outer sleeve provided by an embodiment of the present invention.
The reference numerals denote:
1, an upper joint is arranged on the upper part,
2 a cylindrical body, wherein the cylindrical body is provided with a cylindrical body,
201 an outer sleeve of a tubular body,
2011 a longitudinal through-groove is formed,
202 a variable-diameter shaft is arranged on the shaft,
203, the spring is arranged in the middle of the shell,
204 of the slide block, and the slide block,
205 a backing ring, 205, is provided,
206 arc-shaped limiting sheets are arranged on the upper surface of the base,
207 to fasten the screw, the screw is tightened,
3 a guide head.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The drift size gauge tool based on the prior art is suitable for drift operation wells, but not suitable for operation wells with smaller inner diameter of wellhead Christmas trees and larger inner diameter of oil pipes in a shaft, such as part of operation wells in Hainan Fushan oil fields, the shaft of the drift size gauge tool adopts an oil pipe with an inner diameter of 3 inches, the drift diameter of the wellhead Christmas tree is 2-7/8 inches, and the inner diameter of the drift size gauge tool has the characteristics of small top and large bottom. The embodiment of the invention provides a variable-diameter drift size gauge tool which is suitable for the operation well with the characteristics of small top and big bottom.
As shown in fig. 1, the drift size gauge provided by the embodiment of the invention comprises an upper joint 1 and a cylindrical body 2, wherein the upper end of the cylindrical body 2 is connected with the lower end of the upper joint 1, and particularly, the outer diameter of the cylindrical body 2 is variable; when the cylindrical body 2 is pressed downward, the outer diameter becomes smaller; the outer diameter of the cylindrical body 2 is maintained constant when no pressure is applied.
The variable-diameter drift size gauge tool provided by the embodiment of the invention is connected with a drift tubular column through an upper joint 1 to lift and release; through setting up tube-shape body 2 to the external diameter is changeable, when the internal diameter that faces well head production tree is less than the operation well of pit shaft internal diameter, can give tube-shape body 2 decurrent pressure at first manually, make its external diameter diminish to lower the well head production tree that the internal diameter is less with it under this state, treat through the great oil pipe of well head production tree entering internal diameter after, tube-shape body 2 will no longer receive decurrent pressure, its external diameter resumes the normal position and maintains unchanged this moment, can normally carry out the drifting operation. After the drifting operation is completed, the drifting tubular column is lifted up until the wellhead Christmas tree, at the moment, the outer diameter of the cylindrical body 2 is larger than the inner diameter of the wellhead Christmas tree, and in the process of continuously lifting up, the wellhead Christmas tree gives downward pressure to the cylindrical body 2 to reduce the outer diameter of the wellhead Christmas tree, so that the wellhead Christmas tree can smoothly pass through the wellhead Christmas tree. Therefore, the variable-diameter drift size gauge provided by the embodiment of the invention effectively solves the problem that the drift size gauge of the operation well with the inner diameter of the wellhead Christmas tree smaller than the inner diameter of the oil pipe in the shaft is blocked, and is also suitable for the common full-drift-diameter operation well in the field.
It will be appreciated that the above "pressure" refers to a downward external force and does not include the operating pressure to which the tubular body 2 is subjected to contact with the wall of the tubing during the drifting operation.
Further, as shown in fig. 1, the drift size gauge provided by the embodiment of the invention further comprises a guide head 3; the upper end of the guide head 3 is connected with the lower end of the cylindrical body 2, and the lower end is conical. Through setting up like the guide head 3 of structure, its effect is more favorable to this drift size to go into the pit, especially the pit of well head production tree internal diameter less in the pit.
In order to achieve the reduction of the diameter of the tubular body 2 when it is subjected to a downward pressure, and to restore its original outer diameter when it is not subjected to a pressure, a specific embodiment is given below:
as an embodiment, as shown in fig. 1, the cylindrical body 2 includes an outer sleeve 201, a reducing shaft 202, a spring 203, and a plurality of sliders 204, wherein both ends of the outer sleeve 201 are respectively connected to the outer sleeve 201 of the upper joint 1 and the guide head 3, and a plurality of longitudinal through grooves 2011 (see fig. 2) of a predetermined length are uniformly arranged on the wall of the outer sleeve 201 along the circumferential direction. The reducing shaft 202 is fixedly sleeved inside the outer sleeve 201, and the reducing shaft 202 comprises a large-diameter section and a small-diameter section which are sequentially connected from top to bottom. The spring 203 is sleeved on the small diameter section of the reducing shaft 202, and the lower end of the spring 203 is abutted against the upper end of the guide head 3. The sliding block 204 comprises a sliding rail part and a well dredging part which are connected in sequence, the sliding rail part is in slidable contact with the reducer shaft 202 in the outer sleeve 201, and the lower end of the sliding rail part is abutted against the upper end of the spring 203; the through-well part passes through the longitudinal through-groove 2011 and extends out of the outer sleeve 201; the slider 204 moves up and down along the longitudinal through groove 2011 by the slider rail portion.
A description is given below as to how the cylindrical body 2 in this embodiment can realize the outer diameter variation: when no pressure is applied (i.e. no downward external force is applied), the sliding blocks 204 are located at the large-diameter section of the reducing shaft 202 under the supporting action of the springs 203 at the lower ends of the sliding blocks 204, the sliding blocks 204 are matched to form the large-diameter state of the cylindrical body 2, specifically, the sliding rail parts of the sliding blocks 204 are in contact with the large-diameter section of the reducing shaft 202 in the outer sleeve 201, and the well opening parts of the sliding blocks 204 are arranged outside the outer sleeve 201 for well opening operation of the inner wall of the oil pipe.
When downward pressure is applied to the slider 204, for example, when the drift gauge is lowered, the plurality of sliders 204 are manually pressed down or the plurality of sliders 204 are pressed down by a wellhead christmas tree when the drift gauge is lifted up, the slider 204 will move down along the longitudinal through groove 2011 through the slider part until the slider part of the slider 204 is in contact with the small diameter section of the reducing shaft 202, at this time, as the diameter of the small diameter section is reduced, the drift part of the slider 204 located outside the outer sleeve 201 will retract inwards in the radial direction through the longitudinal through groove 2011, and at this time, the plurality of sliders 204 cooperate to form the small diameter state of the cylindrical body 2, so that the drift gauge can smoothly pass through the wellhead christmas tree.
After waiting to pass through the wellhead production tree, because no longer exert decurrent pressure to it, the spring 203 that compresses this moment will kick-back to the diastole state to promote a plurality of sliders 204 slide rail portion and upwards remove along vertical logical groove 2011 until the slide rail portion of a plurality of sliders 204 offsets with the big footpath section of reducing shaft 202 and contact, barrel-shaped body 2 resumes to original big footpath state this moment, can carry out the drifting operation.
In the embodiment of the present invention, the upper end of the spring 203 in the relaxed state abuts against the lower end of the large diameter section of the reducing shaft 202 (i.e. abuts against the annular step between the large diameter section and the small diameter section), so as to ensure that the plurality of sliders 204 are pushed up to the large diameter section in the large diameter state after the spring 203 rebounds. And, the diameter difference of major diameter section and minor diameter section is confirmed according to the actual internal diameter of well head christmas tree and the actual internal diameter of oil pipe, as long as satisfy when the slide rail portion of slider 204 contacts with the outer wall of major diameter section, the drifting portion of this slider 204 can carry out the drifting operation in the oil pipe, and when the slide rail portion of slider 204 contacts with the outer wall of minor diameter section, the drifting portion of this slider 204 retracts to when contacting with the outer wall of minor diameter section, this tube-shape body 2 can pass through well head christmas tree smoothly.
The number of the vertical through grooves 2011 provided in the outer sleeve 201 corresponds to the number of the sliders 204, and may be, for example, 3, preferably 4. The plurality of longitudinal through grooves 2011 are distributed around the circumference, so that the sliding blocks 204 are distributed in a corresponding circumference, and the well dredging effect is ensured. Moreover, the longitudinal through groove 2011 is designed to have a predetermined length, which corresponds to the axial length of the slider 204 moving up and down, it can be understood that the predetermined length only needs to satisfy the purpose that the slider 204 can move down to contact with the small diameter section to reduce the diameter, and meanwhile, the slider 204 can move up to contact with the large diameter section to restore the original diameter.
It will be appreciated that the slide rail portion of the slider 204 is able to move up and down along the reducer shaft 202, but it does not slide radially outward from the longitudinal through slots 2011 out of the outer sleeve 201; the drift portion of the slider 204 can move along with the up-and-down movement of the slide rail portion, and at the same time, it can extend or retract along the radial direction along with the diameter change of the reducer shaft 202, thereby achieving the purpose of changing the outer diameter of the tubular body 2. Wherein, the surface of the well-opening part of the sliding block 204 is preferably set to be an arc surface matched with the oil pipe so as to improve the well-opening effect. Furthermore, a rough structure, such as multiple turns of thread teeth, multiple point-like protrusions, etc., can be arranged on the surface of the well dredging part of the sliding block 204, so that the impurities on the inner wall of the oil pipe can be separated more easily.
Further, on the basis that the cylindrical body 2 is configured as the above structure, in order to ensure that the stress of the spring 203 is uniform, the cylindrical body 2 further includes a backing ring 205, the backing ring 205 is axially movably sleeved on the small diameter section of the reducing shaft 202, and the upper end of the backing ring is abutted to the lower end of the sliding rail portion of the sliding block 204, and the lower end of the backing ring is connected to the upper end of the spring 203. Because the backing ring 205 has a larger force bearing area than the spring 203, the backing ring 205 is arranged between the sliding block 204 and the spring 203 to serve as a force transmission component, and meanwhile, the uniform force bearing of the spring 203 and the sliding block 204 is ensured, so that the plurality of pulleys 204 are ensured to synchronously slide up and down. It is understood that the backing ring 205 also moves up and down along the small diameter section of the variable diameter shaft 202 within the outer sleeve 201, and the inner diameter of the backing ring 205 is smaller than the outer diameter of the large diameter section of the variable diameter shaft 202 to abut against the bottom of the large diameter section in the relaxed state of the spring 203, thereby stably contacting the plurality of sliders 204 with the large diameter section. In addition, if the slider 204 is subjected to a certain external force during the drifting operation, the external force is not enough to cause the spring 203 to retract, so the elastic force of the spring 203 should be selected based on the external force.
As for the structure of the slider 204, it can be realized in various ways as long as it is satisfied that it can move up and down along the longitudinal through groove 2011 in contact with the reducing shaft 202 and can also retract into the longitudinal through groove 2011. As a preferred embodiment: the sliding block 204 is a convex block body, the upper convex part of the convex block body is used as the through well part of the sliding block 204, and the lower bottom of the convex block body is used as the sliding rail part of the sliding block 204; a limiting step is formed between the upper convex part and the lower bottom part to prevent the slide rail part from sliding out of the longitudinal through groove 2011. Through the structure of arranging the slider 204, because the width of the lower bottom part is greater than that of the upper convex part, a limit step which is abutted against the inner wall of the outer sleeve 201 is formed between the through-well part and the slide rail part, so that the slide rail part of the slider 204 cannot slide out of the longitudinal groove under the action of the limit step in the up-and-down moving process, and the through-hole part of the slider can extend outwards or contract inwards from the longitudinal through groove 2011.
Because the sliding block 204 needs to move up and down in the longitudinal through groove 2011 and can also retract into the longitudinal through groove 2011, a certain gap is formed between the through hole part of the sliding block 204 and the longitudinal through groove 2011, in order to further ensure that the sliding rail part of the sliding block 204 cannot slide out of the longitudinal through groove 2011 in the up-and-down moving process, the cylindrical body 2 further comprises a plurality of arc-shaped limiting pieces 206, the arc-shaped limiting pieces 206 are fixed on the outer wall of the outer sleeve 201 between two adjacent longitudinal through grooves 2011, and two sides of each arc-shaped limiting piece are in slidable contact with one side wall of the through hole part of the adjacent sliding block 204. Through setting up spacing piece 206 of arc with the clearance between the logical well portion of shutoff slider 204 and the vertical logical groove 2011, guaranteed that the slide rail portion of slider 204 can not follow the roll-off in the vertical logical groove 2011. It is understood that the number of the arc-shaped limiting pieces 206 corresponds to the number of the longitudinal through grooves 2011, for each longitudinal through groove 2011, two arc-shaped limiting pieces 206 are used for limiting two longitudinal side edges of the longitudinal through groove, and the well opening part of the sliding block 204 can extend and retract between the two arc-shaped limiting pieces 206.
The arc-shaped spacing pieces 206 are preferably fixed to the outer wall of the outer sleeve 201 by using fastening screws 207 to ensure a stable spacing action of the arc-shaped spacing pieces 206. Specifically, a through hole is formed in the wall of the arc-shaped limiting piece 206, corresponding blind internal threads are formed in the outer wall of the outer sleeve 201, and after the fastening screw 207 penetrates through the through hole in the arc-shaped limiting piece 206, the blind internal threads in the outer sleeve 201 are fixed in a threaded connection mode.
Further, in order to ensure that the outer wall of the arc-shaped limiting piece 206 and the outer wall of the outer sleeve 201 are on the same arc-shaped surface after the arc-shaped limiting piece is fixed on the outer sleeve, so that the outer diameter of the outer sleeve 201 is consistent, a circle of groove is arranged on the outer wall of the outer sleeve 201, and the arc-shaped limiting piece 206 and the longitudinal through groove 2011 are both arranged on the wall of the outer sleeve 201 where the groove is located.
In addition, in the embodiment of the present invention, chamfers are disposed at both the upper and lower ends of the through-hole portion of the slider 204, so that when the slider 204 is subjected to a downward pressure, it can more stably and controllably descend, and the diameter changing process of the cylindrical body 2 is more stable.
In the embodiment of the present invention, in order to facilitate installation, maintenance and component replacement of the drift diameter gauge, preferably, the upper end of the outer sleeve 201 is sleeved outside the lower end of the upper joint 1 in a threaded manner, the upper end of the large diameter section of the reducing shaft 202 is sleeved in the inner cavity of the upper end of the outer sleeve 201 in a threaded manner, the upper end of the guide head 3 is sleeved in the inner cavity of the lower end of the outer sleeve 201 in a threaded manner, and meanwhile, the upper end of the guide head 3 is favorably abutted against the spring 203 in the outer sleeve 201.
Further, in order to facilitate the spring 203 to be sleeved on the small-diameter section of the reducing shaft 202, in the embodiment of the invention, the upper part of the guide head 3 is provided with the axial blind groove for accommodating the lower end of the small-diameter section of the reducing shaft 202, so that after the spring 203 is sleeved on the small-diameter section, the small-diameter section is limited by the axial blind groove of the guide head 3, and meanwhile, the spring 203 is limited by the upper end of the guide head 3, so that the spring 203 assists the sliding block 204 to perform normal reducing operation.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The variable-diameter drift size gauge tool comprises an upper joint (1) and a cylindrical body (2) of which the upper end is connected with the lower end of the upper joint (1), and is characterized in that the outer diameter of the cylindrical body (2) is variable;
when the cylindrical body (2) is pressed downwards, the outer diameter is reduced;
the outer diameter of the cylindrical body (2) is kept unchanged when the cylindrical body is not subjected to pressure;
the drift size gauge tool also comprises a guide head (3);
the upper end of the guide head (3) is connected with the lower end of the cylindrical body (2);
the cylindrical body (2) comprises: the two ends of the outer sleeve (201) are respectively connected with the upper connector (1) and the guide head (3), and a plurality of longitudinal through grooves (2011) with preset lengths are uniformly formed in the wall of the outer sleeve (201) along the circumferential direction;
the variable-diameter shaft (202) is fixedly sleeved in the outer sleeve (201) and comprises a large-diameter section and a small-diameter section which are sequentially connected from top to bottom;
the spring (203) is sleeved on the small-diameter section of the reducing shaft (202), and the lower end of the spring (203) is abutted against the upper end of the guide head (3);
a plurality of sliding blocks (204) comprising a sliding rail part and a well dredging part which are connected in sequence, wherein the sliding rail part is in slidable contact with the reducing shaft (202) in the outer sleeve (201), and the lower end of the sliding rail part is abutted against the upper end of the spring (203); the well-through part protrudes through the longitudinal through slot (2011) to the outside of the outer sleeve (201);
the sliding block (204) moves up and down along the longitudinal through groove (2011) through the sliding rail part.
2. Drift gauge according to claim 1, characterized in that the lower end of the guide head (3) is provided in the shape of a cone.
3. The drift gauge of claim 1, wherein the cylindrical body (2) further comprises a backing ring (205);
the backing ring (205) is axially movably sleeved on the small-diameter section of the reducing shaft (202), the upper end of the backing ring is abutted against the lower end of the sliding rail part of the sliding block (204), and the lower end of the backing ring is connected with the upper end of the spring (203).
4. The drift gauge of claim 1, wherein the slider (204) is a dogbone block;
the upper convex part of the convex block body is used as the well opening part of the sliding block (204), and the lower bottom part of the convex block body is used as the sliding rail part of the sliding block (204);
and a limiting step is formed between the upper convex part and the lower bottom part and used for preventing the sliding rail part from sliding out of the longitudinal through groove (2011).
5. The drift gauge of claim 4, wherein the cylindrical body (2) further comprises a plurality of arcuate spacers (206);
the arc-shaped limiting sheet (206) is fixed on the outer wall of the outer sleeve (201) between two adjacent longitudinal through grooves (2011), and two sides of the arc-shaped limiting sheet are respectively in slidable contact with one side wall of the through-well part of the adjacent sliding block (204).
6. The drift gauge of claim 5, wherein the arc-shaped stop tab (206) is secured to the outer wall of the outer sleeve (201) by use of a fastening screw (207).
7. A drift gauge according to claim 5, wherein the outer wall of the outer sleeve (201) is provided with a ring of grooves;
the arc-shaped limiting sheet (206) and the longitudinal through groove (2011) are both arranged on the wall of the outer sleeve (201) where the groove is located.
8. The drift gauge of claim 7, wherein the upper and lower ends of the drift portion of the shoe (204) are chamfered.
9. Drift gauge according to claim 1, characterized in that the upper part of the guide head (3) is provided with an axial blind groove for housing the lower end of the small diameter section of the reducer shaft (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217759.0A CN108240192B (en) | 2016-12-26 | 2016-12-26 | Variable-diameter drift size gauge tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217759.0A CN108240192B (en) | 2016-12-26 | 2016-12-26 | Variable-diameter drift size gauge tool |
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| Publication Number | Publication Date |
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| CN108240192A CN108240192A (en) | 2018-07-03 |
| CN108240192B true CN108240192B (en) | 2020-07-10 |
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| CN201611217759.0A Active CN108240192B (en) | 2016-12-26 | 2016-12-26 | Variable-diameter drift size gauge tool |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2286496Y (en) * | 1997-04-10 | 1998-07-22 | 新疆石油管理局钻井公司 | Tool for grappling object falling from well wall |
| US6308780B1 (en) * | 1991-12-28 | 2001-10-30 | Alexei Alexeevich Efimkin | Method for regaining mud circulation in operating well and device for its embodiment |
| CN202970627U (en) * | 2012-06-16 | 2013-06-05 | 中国石油化工股份有限公司 | Diameter-changeable scale-borer |
| CN104358538A (en) * | 2014-11-06 | 2015-02-18 | 长江大学 | Special fishing spear for fishing of fishes of continuous oil pipe |
| CN204457637U (en) * | 2015-02-05 | 2015-07-08 | 中石化石油工程技术服务有限公司 | Hydraulic variable diameter milling pipeline scraper |
| CN105625972A (en) * | 2016-03-31 | 2016-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Variable-diameter drift diameter gauge |
-
2016
- 2016-12-26 CN CN201611217759.0A patent/CN108240192B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6308780B1 (en) * | 1991-12-28 | 2001-10-30 | Alexei Alexeevich Efimkin | Method for regaining mud circulation in operating well and device for its embodiment |
| CN2286496Y (en) * | 1997-04-10 | 1998-07-22 | 新疆石油管理局钻井公司 | Tool for grappling object falling from well wall |
| CN202970627U (en) * | 2012-06-16 | 2013-06-05 | 中国石油化工股份有限公司 | Diameter-changeable scale-borer |
| CN104358538A (en) * | 2014-11-06 | 2015-02-18 | 长江大学 | Special fishing spear for fishing of fishes of continuous oil pipe |
| CN204457637U (en) * | 2015-02-05 | 2015-07-08 | 中石化石油工程技术服务有限公司 | Hydraulic variable diameter milling pipeline scraper |
| CN105625972A (en) * | 2016-03-31 | 2016-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Variable-diameter drift diameter gauge |
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| CN108240192A (en) | 2018-07-03 |
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