Coiled tubing shearer and coiled tubing shearing method
阅读说明：本技术 连续油管剪切器和连续油管剪切方法 (Coiled tubing shearer and coiled tubing shearing method ) 是由 郭新维 焦文夫 郝力博 王建磊 朱召召 林国猛 于 2019-10-12 设计创作，主要内容包括：本发明涉及油管打捞技术领域,是一种连续油管剪切器和连续油管剪切方法,前者包括上接头、转换接头、外筒体、打捞卡瓦、卡瓦座、剪钉、剪切卡瓦、螺旋内筒、弹簧、销钉、螺旋外筒和引鞋,上接头下端外侧与转换接头上端内侧固定安装在一起；后者包括步骤如下：(1)将上接头与打捞管柱下端固定安装在一起。本发明结构合理而紧凑,构思巧妙,通过销钉与旋转槽配合,使螺旋外筒相对螺旋内筒旋转,从而使引鞋可以将落鱼鱼顶旋转引入打捞工具内部；通过第二锥孔使下行的打捞卡瓦下端收缩夹紧鱼顶；通过打捞卡瓦打捞连续油管,通过第一锥孔使下行的剪切卡瓦下端收缩夹紧待打捞连续油管,具有高效、稳定和省时省力的特点。(The invention relates to the technical field of oil pipe salvage, in particular to a coiled oil pipe shearer and a coiled oil pipe shearing method, wherein the coiled oil pipe shearer comprises an upper joint, a conversion joint, an outer cylinder body, a salvage slip, a slip seat, a shear pin, a shear slip, a spiral inner cylinder, a spring, a pin, a spiral outer cylinder and a guide shoe, wherein the outer side of the lower end of the upper joint is fixedly installed with the inner side of the upper end of the conversion joint; the latter comprises the following steps: (1) and fixedly mounting the upper joint and the lower end of the fishing pipe column together. The invention has reasonable and compact structure and ingenious conception, and the pin is matched with the rotary groove to ensure that the spiral outer cylinder rotates relative to the spiral inner cylinder, so that the guide shoe can guide the top of the fallen fish into the fishing tool in a rotating way; the lower end of the descending fishing slip is contracted to clamp the fish top through the second taper hole; through salvaging the slips and salvaging the coiled tubing, the lower end of the descending shearing slips is contracted and clamped tightly through the first taper hole to be used for salvaging the coiled tubing, and the device has the characteristics of high efficiency, stability, time saving and labor saving.)
1. A continuous oil pipe shearer is characterized by comprising an upper joint, a conversion joint, an outer barrel, a salvaging slip, a slip seat, a shear pin, a shearing slip, a spiral inner barrel, a spring, a pin, a spiral outer barrel and a guide shoe, wherein the outer side of the lower end of the upper joint is fixedly installed with the inner side of the upper end of the conversion joint; the middle part of the outer cylinder body is provided with a fishing and cutting channel which is communicated up and down, the fishing and cutting channel comprises a first straight hole, a first taper hole and a second straight hole which are communicated in sequence from top to bottom, and the first taper hole is a taper hole with a large top and a small bottom; a slip seat is fixedly arranged in the first straight hole corresponding to the inner side position of the upper part of the outer barrel through a shear pin, a second through hole which is communicated up and down is arranged in the middle of the slip seat, the second through hole is a taper hole with a big top and a small bottom, a salvaging slip with a lower end seat arranged on the inner side of the upper part of the second through hole is arranged on the inner side of the upper part of the outer barrel, the inner side of the upper part of the salvaging slip can be radially outwards expanded when being subjected to outwards extrusion force, the outer side of the lower part of the salvaging slip can be radially inwards contracted when, a shearing slip with a lower end seat positioned on the inner side of the upper part of the first taper hole is arranged in the first taper hole corresponding to the inner side of the lower part of the outer barrel, the outer side of the lower part of the shearing slip can contract inwards in the radial direction when being subjected to inward extrusion force, shearing teeth are arranged on the inner side of the lower part of the shearing slip, the shearing slip is positioned below the slip seat, and the outer diameter of the upper end of the shearing slip is larger than the inner diameter of the lower end of the slip seat; a limiting ring table is arranged on the outer side of the upper end of the spiral inner barrel, a spring is sleeved on the outer side of the spiral inner barrel corresponding to the position between the limiting ring table and the spiral outer barrel, the upper end of the spring is abutted against the lower end of the limiting ring table, and the lower end of the spring is abutted against the upper end of the spiral outer barrel; at least one pin is fixedly installed on the outer side of the upper portion of the spiral outer barrel, the axis of the pin is perpendicular to the axis of the spiral outer barrel, a rotating groove enabling the rotating pin to move up and down in the rotating groove is formed in the outer side of the spiral inner barrel corresponding to the position below the limiting ring table, the rotating groove is spiral, and the inner end of the pin is located in the rotating groove.
2. The coiled tubing shearer of claim 1, wherein the fishing slips comprise a conical cylinder and a straight cylinder, the conical cylinder is in a hollow circular truncated cone shape with a small top and a large bottom, the straight cylinder is in a hollow cylindrical shape, the lower end of the conical cylinder is fixedly mounted with the upper end of the straight cylinder, at least three upper long notches with lower ends located at the upper part of the straight cylinder are uniformly distributed at the upper end of the fishing slips along the circumference, and lower long notches with upper ends located at the lower part of the conical cylinder are arranged at the lower ends of the fishing slips corresponding to the positions between every two adjacent upper long notches.
3. The coiled tubing shearer of claim 1 or 2, wherein the shearing slips are hollow cylinders, and the lower ends of the shearing slips are uniformly provided with at least three strip openings with upper ends located in the middle of the shearing slips along the circumference.
4. The coiled tubing cutter of claim 1 or 2, wherein two pins are fixedly mounted on the outer side of the upper part of the spiral outer cylinder.
5. The coiled tubing cutter of claim 3, wherein two pins are fixedly mounted on the outer side of the upper portion of the spiral outer cylinder.
6. The coiled tubing cutter according to claim 1, 2 or 5, wherein the outer side of the lower end of the upper joint is fixedly connected with the inner side of the upper end of the adapter through a thread, the outer side of the lower end of the adapter is fixedly connected with the inner side of the upper end of the outer cylinder through a thread, the outer side of the lower end of the outer cylinder is fixedly connected with the inner side of the upper end of the spiral inner cylinder through a thread, and the outer side of the lower end of the spiral outer cylinder is fixedly connected with the inner side of the upper end of the guide shoe through a.
7. The coiled tubing cutter according to claim 3, wherein the outer side of the lower end of the upper joint is fixedly connected with the inner side of the upper end of the adapter through a thread, the outer side of the lower end of the adapter is fixedly connected with the inner side of the upper end of the outer cylinder through a thread, the outer side of the lower end of the outer cylinder is fixedly connected with the inner side of the upper end of the spiral inner cylinder through a thread, and the outer side of the lower end of the spiral outer cylinder is fixedly connected with the inner side of the upper end of the guide shoe through a.
8. The coiled tubing cutter according to claim 4, wherein the outer side of the lower end of the upper joint is fixedly connected with the inner side of the upper end of the adapter through a thread, the outer side of the lower end of the adapter is fixedly connected with the inner side of the upper end of the outer cylinder through a thread, the outer side of the lower end of the outer cylinder is fixedly connected with the inner side of the upper end of the spiral inner cylinder through a thread, and the outer side of the lower end of the spiral outer cylinder is fixedly connected with the inner side of the upper end of the guide shoe through a.
9. A coiled tubing shearing method using the coiled tubing cutter as claimed in any one of claims 1 to 8, characterized by comprising the steps of: (1) fixedly installing the upper joint and the lower end of the fishing pipe column together, and lowering the fishing pipe column to start fishing operation; (2) after the guide shoe contacts the fish top, the pin moves upwards in the rotary groove to enable the spiral outer cylinder to rotate relative to the spiral inner cylinder, so that the guide shoe rotates along with the spiral outer cylinder, and the fish top is guided into the guide shoe; (3) after the fish top is introduced into the guide shoe, the fishing pipe column is lowered, and the fish top sequentially passes through the spiral outer cylinder, the spiral inner cylinder, the outer cylinder, the shearing slip, the slip seat and the fishing slip; (4) the fishing pipe column is continuously lowered, the fish top continuously moves upwards, and when the fish top contacts the inner side of the upper end of the fishing slip and generates outward extrusion force on the fishing slip, the upper end of the fishing slip is radially expanded outwards; (5) the elastic force of the upper end of the fishing slip grips the fish to provide initial pretightening force, under the pretightening force, the fishing pipe column is lifted, and the upper end of the fishing slip grips the outer wall of the fish to move downwards relative to the outer barrel; (6) in the process that the salvaging slips move downwards, the lower ends of the salvaging slips are squeezed by the conical surfaces of the second taper holes and then are contracted inwards, the outer walls of the fallen fishes are tightly bitten by the annular slip teeth at the lower parts of the salvaging slips, and the salvaging pipe column is continuously lifted to finish the salvaging operation of the continuous oil pipe; (7) if the coiled tubing is clamped underground and the fishing pipe column cannot be lifted, continuing to lower the fishing pipe column until the target position needing to be cut by shearing, namely the stuck point position; (8) after reaching the clamping point, lifting the fishing pipe column, enabling the annular slip teeth at the lower part of the fishing slip to bite the outer wall of the fish again, continuing to lift the fishing pipe column at the moment, and further increasing the lifting load; (9) when the downward stress of the slip bowl reaches the shearing force of the shearing nail, the shearing nail is sheared, the slip bowl continues to push the shearing slip downwards at the moment, the lower end of the shearing slip is extruded by the conical surface of the first conical hole and then contracts inwards, and the shearing teeth act on the outer wall of the coiled tubing to be salvaged; (10) and continuously lifting the fishing pipe column to increase the lifting load until the coiled tubing to be fished is cut off, thereby completing the fishing operation of the coiled tubing to be fished.
Technical Field
The invention relates to the technical field of oil pipe fishing, in particular to a coiled oil pipe shearer and a coiled oil pipe shearing method.
Background
Along with popularization and application of the coiled tubing in the field of oil and gas downhole operation, the coiled tubing is applied more on an oil and gas field, and meanwhile, more and more coiled tubing are broken and then clamped in a well and other downhole complex conditions occur. Because tools and operation experiences for complex condition processing such as coiled tubing unfreezing and fishing are few in the current operation field, the tools and the method are limited in the complex processing, the processing is passive, and the success rate is low. In addition, the existing unfreezing device is unstable in the using process.
Disclosure of Invention
The invention provides a coiled tubing shearer and a coiled tubing shearing method, overcomes the defects of the prior art, and can effectively solve the problem that the existing coiled tubing cannot be salvaged after being clamped into a well.
One of the technical schemes of the invention is realized by the following measures: a continuous oil pipe shearer comprises an upper joint, a conversion joint, an outer cylinder, a fishing slip, a slip seat, a shear pin, a shearing slip, a spiral inner cylinder, a spring, a pin, a spiral outer cylinder and a guide shoe, wherein the outer side of the lower end of the upper joint is fixedly installed with the inner side of the upper end of the conversion joint, the outer side of the lower end of the conversion joint is fixedly installed with the inner side of the upper end of the outer cylinder, the outer side of the lower end of the outer cylinder is fixedly installed with the inner side of the upper end of the spiral inner cylinder, the outer side of the lower part of the spiral inner cylinder is sleeved with; the middle part of the outer cylinder body is provided with a fishing and cutting channel which is communicated up and down, the fishing and cutting channel comprises a first straight hole, a first taper hole and a second straight hole which are communicated in sequence from top to bottom, and the first taper hole is a taper hole with a large top and a small bottom; a slip seat is fixedly arranged in the first straight hole corresponding to the inner side position of the upper part of the outer barrel through a shear pin, a second through hole which is communicated up and down is arranged in the middle of the slip seat, the second through hole is a taper hole with a big top and a small bottom, a salvaging slip with a lower end seat arranged on the inner side of the upper part of the second through hole is arranged on the inner side of the upper part of the outer barrel, the inner side of the upper part of the salvaging slip can be radially outwards expanded when being subjected to outwards extrusion force, the outer side of the lower part of the salvaging slip can be radially inwards contracted when, a shearing slip with a lower end seat positioned on the inner side of the upper part of the first taper hole is arranged in the first taper hole corresponding to the inner side of the lower part of the outer barrel, the outer side of the lower part of the shearing slip can contract inwards in the radial direction when being subjected to inward extrusion force, shearing teeth are arranged on the inner side of the lower part of the shearing slip, the shearing slip is positioned below the slip seat, and the outer diameter of the upper end of the shearing slip is larger than the inner diameter of the lower end of the slip seat; a limiting ring table is arranged on the outer side of the upper end of the spiral inner barrel, a spring is sleeved on the outer side of the spiral inner barrel corresponding to the position between the limiting ring table and the spiral outer barrel, the upper end of the spring is abutted against the lower end of the limiting ring table, and the lower end of the spring is abutted against the upper end of the spiral outer barrel; at least one pin is fixedly installed on the outer side of the upper portion of the spiral outer barrel, the axis of the pin is perpendicular to the axis of the spiral outer barrel, a rotating groove enabling the rotating pin to move up and down in the rotating groove is formed in the outer side of the spiral inner barrel corresponding to the position below the limiting ring table, the rotating groove is spiral, and the inner end of the pin is located in the rotating groove.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the salvaging slips can comprise a conical cylinder and a straight cylinder, the conical cylinder is in a hollow round platform shape with a small upper part and a large lower part, the straight cylinder is in a hollow cylindrical shape, the lower end of the conical cylinder and the upper end of the straight cylinder are fixedly installed together, the upper end of the salvaging slips is evenly provided with at least three upper long openings with lower ends positioned on the upper part of the straight cylinder along the circumference, and the lower end of the salvaging slips corresponding to the position between every two adjacent upper long openings is provided with a lower long opening with upper ends positioned on the lower part of the conical cylinder.
The shearing slips can be hollow cylindrical, and the lower end of the shearing slips is evenly provided with at least three strip openings with the upper ends positioned in the middle of the shearing slips along the circumference.
Two pins can be fixedly arranged on the outer side of the upper part of the spiral outer barrel.
The outer side of the lower end of the upper joint can be fixedly installed together with the inner side of the upper end of the adapter through threaded connection, the outer side of the lower end of the adapter can be fixedly installed together with the inner side of the upper end of the outer cylinder through threaded connection, the outer side of the lower end of the outer cylinder can be fixedly installed together with the inner side of the upper end of the spiral inner cylinder through threaded connection, and the outer side of the lower end of the spiral outer cylinder can be fixedly installed together with the inner side of the upper.
The second technical scheme of the invention is realized by the following measures: a coiled tubing shearing method using the coiled tubing shearer comprises the following steps:
(1) fixedly installing the upper joint and the lower end of the fishing pipe column together, and lowering the fishing pipe column to start fishing operation;
(2) after the guide shoe contacts the fish top, the pin moves upwards in the rotary groove to enable the spiral outer cylinder to rotate relative to the spiral inner cylinder, so that the guide shoe rotates along with the spiral outer cylinder, and the fish top is guided into the guide shoe;
(3) after the fish top is introduced into the guide shoe, the fishing pipe column is lowered, and the fish top sequentially passes through the spiral outer cylinder, the spiral inner cylinder, the outer cylinder, the shearing slip, the slip seat and the fishing slip;
(4) the fishing pipe column is continuously lowered, the fish top continuously moves upwards, and when the fish top contacts the inner side of the upper end of the fishing slip and generates outward extrusion force on the fishing slip, the upper end of the fishing slip is radially expanded outwards;
(5) the elastic force of the upper end of the fishing slip grips the fish to provide initial pretightening force, under the pretightening force, the fishing pipe column is lifted, and the upper end of the fishing slip grips the outer wall of the fish to move downwards relative to the outer barrel;
(6) in the process that the salvaging slips move downwards, the lower ends of the salvaging slips are squeezed by the conical surfaces of the second taper holes and then are contracted inwards, the outer walls of the fallen fishes are tightly bitten by the annular slip teeth at the lower parts of the salvaging slips, and the salvaging pipe column is continuously lifted to finish the salvaging operation of the continuous oil pipe;
(7) if the coiled tubing is clamped underground and the fishing pipe column cannot be lifted, continuing to lower the fishing pipe column until the target position needing to be cut by shearing, namely the stuck point position;
(8) after reaching the clamping point, lifting the fishing pipe column, enabling the annular slip teeth at the lower part of the fishing slip to bite the outer wall of the fish again, continuing to lift the fishing pipe column at the moment, and further increasing the lifting load;
(9) when the downward stress of the slip bowl reaches the shearing force of the shearing nail, the shearing nail is sheared, the slip bowl continues to push the shearing slip downwards at the moment, the lower end of the shearing slip is extruded by the conical surface of the first conical hole and then contracts inwards, and the shearing teeth act on the outer wall of the coiled tubing to be salvaged;
(10) and continuously lifting the fishing pipe column to increase the lifting load until the coiled tubing to be fished is cut off, thereby completing the fishing operation of the coiled tubing to be fished.
The invention has reasonable and compact structure and ingenious conception, and the pin is matched with the rotary groove to ensure that the spiral outer cylinder rotates relative to the spiral inner cylinder, so that the guide shoe can guide the top of the fallen fish into the fishing tool in a rotating way; detecting whether the fish is salvaged and gripped or not through the change of the ground pump pressure after the plugging steel ball goes upward and is seated in the first taper hole; the lower end of the descending fishing slip is contracted to clamp the fish top through the second taper hole; the coiled tubing is salvaged through the salvage slips, and the coiled tubing fishing device has the advantages of being efficient, stable, time-saving and labor-saving.
Drawings
FIG. 1 is a schematic sectional view of the preferred embodiment of the present invention.
FIG. 2 is a schematic view of the spiral inner barrel of FIG. 1.
The codes in the figures are respectively: 1 is the top connection, 2 is the crossover sub, 3 is outer barrel, 4 is the slips of salvaging, 5 is the slip seat, 6 is the shear pin, 7 is the shear slip, 8 is the spiral inner tube, 9 is the spring, 10 is the pin, 11 is the spiral outer tube, 12 is the guide shoe, 13 is the spacing ring platform, 14 is the swivelling chute, 15 is first taper hole, 16 is the second taper hole.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The invention is further described with reference to the following examples and figures:
as shown in the attached figures 1 and 2, the continuous oil pipe shearer comprises an upper joint 1, a conversion joint 2, an outer cylinder 3, a salvaging slips 4, a slip seat 5, a shear pin 6, a shearing slip 7, a spiral inner cylinder 8, a spring 9, a
According to requirements, the fishing slip 4 is a known technology, the upper part and the lower part of the fishing slip 4 are of split elastic structures, the inner side of the lower part of the fishing slip 4 is provided with an annular slip insert, the inner side of the upper part of the fishing slip 4 can be radially outwards expanded when being subjected to outwards extrusion force, and the outer side of the lower part of the fishing slip 4 can be radially inwards contracted when being subjected to inwards extrusion force; the shearing slip 7 is a well-known technology, the lower part of the shearing slip 7 is of a split elastic structure, the inner side of the lower part of the shearing slip 7 is provided with shearing teeth, and the outer side of the lower part of the shearing slip 7 can contract inwards in the radial direction when being subjected to inward extrusion force. In the using process, the fishing tool is connected to the lower end of the existing well-known fishing pipe column, is fixedly installed with the lower end of the fishing pipe column through the upper connector 1, and then is lowered to start fishing operation; firstly, after the
The coiled tubing cutter can be further optimized or/and improved according to actual needs:
as shown in the attached figures 1 and 2, the salvaging slips 4 comprises a conical cylinder and a straight cylinder, the conical cylinder is in a hollow round platform shape with a small upper part and a big lower part, the straight cylinder is in a hollow cylindrical shape, the lower end of the conical cylinder is fixedly installed with the upper end of the straight cylinder, the upper end of the salvaging slips 4 is evenly provided with at least three upper long openings with the lower ends positioned on the upper part of the straight cylinder along the circumference, and the lower end of the salvaging slips 4 corresponding to the position between every two adjacent upper long openings is provided with a lower long opening with the upper end positioned on the lower part of the. In the using process, the upper part of the salvaging slips 4 forms a plurality of split elastic structures by arranging the upper long opening on the conical cylinder, so that the inner side of the upper part of the salvaging slips 4 can be radially expanded outwards when being subjected to outwards extrusion force; the lower part of the salvaging slips 4 forms a plurality of split elastic structures by arranging the lower long opening on the straight column barrel, so that the outer side of the lower part of the salvaging slips 4 can radially contract inwards when being subjected to inward extrusion force; thereby completing the fishing operation of the coiled tubing through the annular slip teeth on the inner side of the fishing slip 4.
As shown in attached figures 1 and 2, the shearing slip 7 is hollow and cylindrical, and at least three strip openings with upper ends located in the middle of the shearing slip 7 are uniformly distributed at the lower end of the shearing slip 7 along the circumference. In the using process, the lower part of the shearing slip 7 forms a plurality of split elastic structures by arranging the strip openings on the shearing slip 7, so that the outer side of the lower part of the shearing slip 7 can contract inwards in the radial direction when being subjected to inwards extrusion force; thereby completing the shearing operation of the coiled tubing by shearing the shearing teeth inside the slips 7.
As shown in fig. 1 and 2, two
As shown in the attached drawings 1 and 2, the outer side of the lower end of the upper joint 1 is fixedly installed with the inner side of the upper end of the adapter 2 through threaded connection, the outer side of the lower end of the adapter 2 is fixedly installed with the inner side of the upper end of the outer cylinder 3 through threaded connection, the outer side of the lower end of the outer cylinder 3 is fixedly installed with the inner side of the upper end of the spiral inner cylinder 8 through threaded connection, and the outer side of the lower end of the spiral outer cylinder 11 is fixedly installed with the inner side of the upper end of the. The arrangement facilitates the disassembly and assembly of the components of the invention during use.
As shown in fig. 1 and 2, a coiled tubing shearing method using the coiled tubing shearer comprises the following steps:
(1) fixedly installing the upper joint 1 and the lower end of the fishing pipe column together, and lowering the fishing pipe column to start fishing operation;
(2) after the
(3) after the
(4) the fishing pipe column is continuously lowered, the fish top continuously moves upwards, and when the fish top contacts the inner side of the upper end of the fishing slip 4 and generates outward extrusion force on the fishing slip, the upper end of the fishing slip 4 is radially expanded outwards;
(5) the self elastic force of the upper end of the fishing slip 4 grabs the fish to provide initial pretightening force, under the pretightening force, the fishing pipe column is lifted, and the upper end of the fishing slip 4 grabs the outer wall of the fish to move downwards relative to the outer barrel 3;
(6) in the process that the salvaging slips 4 move downwards, the lower end of the salvaging slips 4 is squeezed by the conical surface of the
(7) if the coiled tubing is clamped underground and the fishing pipe column cannot be lifted, continuing to lower the fishing pipe column until the target position needing to be cut by shearing, namely the stuck point position;
(8) after reaching the clamping point, lifting the fishing pipe column, enabling the annular slip teeth at the lower part of the fishing slip 4 to bite the outer wall of the fallen fish again, continuing to lift the fishing pipe column at the moment, and further increasing the lifting load;
(9) when the slip seat 5 is stressed downwards to reach the shearing force sheared by the shear pin 6, the shear pin 6 is sheared, at the moment, the slip seat 5 continuously pushes the shear slip 7 downwards, the lower end of the shear slip 7 is extruded by the conical surface of the first
(10) and continuously lifting the fishing pipe column to increase the lifting load until the coiled tubing to be fished is cut off, thereby completing the fishing operation of the coiled tubing to be fished.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
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