CN212672122U - Back-up tong hydraulic control system - Google Patents
Back-up tong hydraulic control system Download PDFInfo
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- CN212672122U CN212672122U CN202020706515.4U CN202020706515U CN212672122U CN 212672122 U CN212672122 U CN 212672122U CN 202020706515 U CN202020706515 U CN 202020706515U CN 212672122 U CN212672122 U CN 212672122U
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Abstract
The utility model provides a back-up tong hydraulic control system, including the back-up tong and for the supply line of back-up tong fuel feeding, still include: the first end of the first oil way is communicated with the supply pipeline, and the second end of the first oil way is communicated with the rodless cavity of the back-up wrench; a first end of the second oil way is communicated with the rod cavity of the back-up tong; the energy accumulator is communicated with the second end of the second oil way; the first oil path has a first state of flowing into the rodless cavity and a second state of flowing out from the rodless cavity through the first oil path; under the condition that the first oil path is in the first state, hydraulic oil in the rod cavity flows into the energy accumulator through the second oil path so as to close the back-up tong; when the first oil passage is in the second state, the hydraulic oil of the accumulator flows from the second oil passage into the rod chamber to open the backup tong. The rotary oil duct is saved, and the original spare oil duct can meet the use requirement of the on-site hydraulic elevator.
Description
Technical Field
The utility model relates to a hydraulic control technical field particularly, relates to a back-up tong hydraulic control system.
Background
At present, a top drive drilling system is called as top drive for short, replaces the traditional drilling operation mode, greatly improves the drilling operation efficiency and safety, and is necessary equipment for high-standard and high-difficulty well operation at present. 2-3 oil ducts are always reserved between the suspension body and the inner sleeve of the top drive rotary head, so that the possibility that the machine has to be shut down for overhaul due to faults is reduced. However, with the improvement of the field automation operation level of a drilling team, the requirement of configuring the hydraulic elevator is provided by the top drive applied on the field, and the hydraulic elevator needs to be provided with three or more rotary oil passages, so that the spare oil passages cannot meet the use requirement of the field hydraulic elevator.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a back-up tong hydraulic control system to solve the insufficient problem of the spare oil duct in the prior art.
In order to achieve the above object, the utility model provides a back-up tong hydraulic control system, include the back-up tong and for the supply line of back-up tong fuel feeding, still include: the first end of the first oil way is communicated with the supply pipeline, and the second end of the first oil way is communicated with the rodless cavity of the back-up wrench; a first end of the second oil way is communicated with the rod cavity of the back-up tong; the energy accumulator is communicated with the second end of the second oil way; the first oil path has a first state of flowing into the rodless cavity and a second state of flowing out from the rodless cavity through the first oil path; under the condition that the first oil path is in the first state, hydraulic oil in the rod cavity flows into the energy accumulator through the second oil path so as to close the back-up tong; when the first oil passage is in the second state, the hydraulic oil of the accumulator flows from the second oil passage into the rod chamber to open the backup tong.
Further, the back-up tong hydraulic control system further comprises a reversing valve, wherein the reversing valve is arranged between the supply pipeline and the first oil way and used for controlling hydraulic oil to flow into the rodless cavity from the first oil way.
Further, the supply line includes a drain line and a return line, the directional valve has a first position and a second position, the return line communicates with the first oil passage with the directional valve in the first position, and the drain line communicates with the first oil passage with the directional valve in the second position.
Furthermore, the reversing valve is an explosion-proof electromagnetic reversing valve.
Furthermore, the back-up tong hydraulic control system also comprises a three-way rotary valve and a pressure measuring joint line, wherein the three-way rotary valve is arranged on the first oil path and is provided with a first rotary position for disconnecting the first oil path, enabling one end of the first oil path close to the supply pipeline to be communicated with the pressure measuring joint line and a second rotary position for enabling the first oil path to keep a passage.
Furthermore, back-up tong hydraulic control system still includes pressure measurement interface and liquid accuse check valve, and pressure measurement interface and first oil circuit intercommunication, liquid accuse check valve set up on the second oil circuit, and pressure measurement interface is used for controlling liquid accuse check valve.
Further, a pressure reducing valve is provided on the supply line.
Further, the rod chamber and the rodless chamber are filled with hydraulic oil.
By applying the technical scheme of the utility model, when the back-up tong needs to be clamped, the hydraulic oil is controlled to flow into the rodless cavity from the first oil path, the hydraulic oil in the rod cavity is extruded into the energy accumulator through the second oil path, at the moment, the back-up tong gradually clamps, when the back-up tong needs to be opened, the hydraulic oil is controlled not to flow into the rodless cavity from the first oil path, the oil stored in the energy accumulator flows into the rod cavity from the second oil path, the oil in the rodless cavity is extruded into the first oil path and returns to the supply pipeline, thereby realizing the opening and clamping of the back-up tong, the back-up tong hydraulic control system realizes the clamping and releasing functions of the back-up tong by using the energy accumulator on the premise of ensuring that the structure of the whole machine is not obviously changed, simultaneously meets the use requirements of a field hydraulic elevator, solves the actual problems on the field, expands the use mode and the method of the energy accumulator, utilizes the energy accumulating function of, the use of the double-acting oil cylinder is realized in a single-acting cylinder mode, the use mode and the use method of the energy accumulator are expanded, the rotary oil passage is saved, and the original spare oil passage can meet the use requirement of the on-site hydraulic elevator.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 schematically shows a circuit diagram of an embodiment of the back-up tong hydraulic control system of the present invention in an initial state;
fig. 2 schematically shows a circuit diagram of an embodiment of the back-up tong hydraulic control system of the present invention in a clamped state;
fig. 3 schematically shows a circuit diagram of an embodiment of the back-up tong hydraulic control system of the present invention in an open state.
Wherein the figures include the following reference numerals:
10. a first oil passage; 20. a second oil passage; 30. a supply line; 31. an oil outlet line; 32. an oil return line; 40. back-up tongs; 41. a rodless cavity; 42. a rod cavity; 50. an accumulator; 60. an explosion-proof electromagnetic directional valve; 70. testing and pressing a connector circuit; 80. a three-way rotary valve; 91. a pressure measuring interface; 92. a hydraulic control check valve; 93. a pressure reducing valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As noted in the background art, the top drive drilling system, referred to as "top drive" for short, replaces the traditional drilling operation mode, greatly improves the drilling operation efficiency and safety, and is a necessary device for the current high-standard and high-difficulty well operation. 2-3 oil ducts are always reserved between the suspension body and the inner sleeve of the top drive rotary head, so that the possibility that the machine has to be shut down for overhaul due to faults is reduced. However, with the improvement of the field automation operation level of a drilling team, the requirement of configuring the hydraulic elevator is provided by the top drive applied on the field, and the hydraulic elevator needs to be provided with three or more rotary oil passages, so that the spare oil passages cannot meet the use requirement of the field hydraulic elevator.
In order to solve the above problem, referring to fig. 1 to 3, an embodiment of the present invention provides a back-up tong hydraulic control system, including a back-up tong 40, a supply pipeline 30 for supplying oil to the back-up tong 40, a first oil path 10, a second oil path 20, and an accumulator 50, wherein a first end of the first oil path 10 is communicated with the supply pipeline 30, and a second end of the first oil path 10 is communicated with a rodless cavity 41 of the back-up tong 40; a first end of the second oil passage 20 communicates with the rod chamber 42 of the backup tong 40; the accumulator 50 communicates with the second end of the second oil passage 20; the first oil passage 10 has a first state in which it flows into the rodless chamber 41 and a second state in which it flows out from the interior of the rodless chamber 41 through the first oil passage 10; in the case where the first oil passage 10 is in the first state, the hydraulic oil of the rod chamber 42 flows into the accumulator 50 through the second oil passage 20 to close the backup tong 40; in the case where the first oil passage 10 is in the second state, the hydraulic oil of the accumulator 50 flows from the second oil passage 20 into the rod chamber 42 to open the backup tong 40. When the back-up tong needs to be clamped, the hydraulic oil is controlled to flow into the rodless cavity from the first oil way, the hydraulic oil in the rod cavity is extruded into the energy accumulator through the second oil way, at the moment, the back-up tong is gradually clamped, when the back-up tong needs to be opened, the hydraulic oil is controlled not to flow into the rodless cavity from the first oil way, the oil stored in the energy accumulator flows into the rod cavity from the second oil way, the oil in the rodless cavity is extruded into the first oil way and returns to the supply pipeline, thereby realizing the opening and clamping of the back-up tong, the back-up tong hydraulic control system realizes the clamping and releasing functions of the back-up tong by using the energy accumulator on the premise of ensuring that the structure of the whole machine is not obviously changed, simultaneously meets the use requirements of a field hydraulic elevator, solves the actual problems on the field, expands the use mode and method of the energy accumulator, utilizes the energy accumulation function of the energy accumulator to realize the use of the double-acting oil cylinder in the, the using mode and the using method of the energy accumulator are expanded, the rotary oil duct is saved, and the original spare oil duct can meet the using requirement of the field hydraulic elevator.
In order to realize the supply control of the oil to the rodless chamber, the back-up tong hydraulic control system in this embodiment further includes a directional control valve provided between the supply line 30 and the first oil passage 10 for controlling the flow of the hydraulic oil from the first oil passage 10 into the rodless chamber 41.
Specifically, the supply line 30 in the present embodiment includes a drain line 31 and a return line 32, the selector valve has a first position and a second position, the return line 32 communicates with the first oil passage 10 in the case where the selector valve is in the first position, and the drain line 31 communicates with the first oil passage 10 in the case where the selector valve is in the second position.
The reversing valve in this embodiment is an explosion-proof electromagnetic reversing valve 60.
The back-up tong hydraulic control system in this embodiment further includes a three-way rotary valve 80 and a pressure measuring joint line 70, the three-way rotary valve 80 being provided on the first oil passage 10, the three-way rotary valve 80 having a first rotational position (see fig. 1) for disconnecting the first oil passage 10, allowing one end of the first oil passage 10 close to the supply line 30 to communicate with the pressure measuring joint line 70, and a second rotational position (see fig. 2) for allowing the first oil passage 10 to remain open.
The back-up tong hydraulic control system in this embodiment further includes a pressure measuring port 91 and a hydraulic control check valve 92, the pressure measuring port 91 is communicated with the first oil path 10, the hydraulic control check valve 92 is disposed on the second oil path 20, the pressure measuring port 91 is used for controlling the hydraulic control check valve 92, and when the pressure of the pressure measuring port 91 reaches a predetermined value, the hydraulic control check valve 92 is opened. When the back-up tong needs to be clamped, hydraulic oil is controlled to flow into the rodless cavity from the first oil way, the pressure measuring connector 91 senses the pressure of a preset value, the hydraulic control one-way valve 92 is opened, the hydraulic oil in the rod cavity is squeezed into the energy accumulator through the second oil way, when the back-up tong needs to be opened, the hydraulic oil is controlled not to flow into the rodless cavity from the first oil way, at the moment, the oil stored in the energy accumulator flows into the rod cavity from the second oil way and the hydraulic control one-way valve 92, and the oil in the rodless cavity is squeezed into the first oil way and returns to the supply pipeline.
The supply line 30 in this embodiment is provided with a pressure reducing valve 93.
The rod chamber 42 and the rodless chamber 41 in this embodiment are filled with hydraulic oil.
Specifically, the working principle is as follows: referring to fig. 1, in an initial state, the back-up tong is in an open state, when the back-up tong needs to be clamped, referring to fig. 2, the anti-explosion electromagnetic directional valve is reversed, high-pressure oil is decompressed by a decompression valve, passes through the anti-explosion electromagnetic directional valve, enters the three-way rotary valve through a first oil path, is pulled to a position where the first oil path is communicated, enters a rodless cavity of the back-up tong through the first oil path, pushes a back-up tong piston to move forwards to clamp a drill string, simultaneously opens the hydraulic control one-way valve through the high-pressure oil coming from the first oil path, enables oil returned from the cavity with the rod of the back-up tong to enter the energy accumulator through the hydraulic control one-way valve and a second oil path, stores hydraulic oil into the energy accumulator, simultaneously, the oil storage pressure of the energy accumulator can be gradually increased, when the back-up tong is clamped in place, the top drive device completes corresponding screwing-down action, referring to fig. 3, the high-pressure oil in the energy accumulator pushes the back-up tong piston to move backwards through the second oil path and the hydraulic control one-way valve, and the hydraulic oil in the rodless cavity of the back-up tong flows back to the oil tank through the three-way rotary valve, the explosion-proof electromagnetic directional valve and the oil return pipeline, so that the clamping and releasing actions of the back-up tong are completed. Due to the high requirements of the system, there is no space for air between the accumulator and the rod chamber of the back-up tong, and the part must be completely filled with hydraulic oil, so that before the back-up tong is activated, this part must first be filled with hydraulic oil, wherein excess high-pressure oil can be drained off via the pressure measuring connection. Meanwhile, in the moving process of the whole machine, the back-up tong oil cylinder cannot automatically slide out due to the existence of the hydraulic control one-way valve, so that a drill rod is damaged. The reset is realized through the reset spring, and the hydraulic control system also belongs to the protection range of the single-action back-up tong hydraulic control system.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
when the back-up tong needs to be clamped, the hydraulic oil is controlled to flow into the rodless cavity from the first oil way, the hydraulic oil in the rod cavity is extruded into the energy accumulator through the second oil way, at the moment, the back-up tong is gradually clamped, when the back-up tong needs to be opened, the hydraulic oil is controlled not to flow into the rodless cavity from the first oil way, the oil stored in the energy accumulator flows into the rod cavity from the second oil way, the oil in the rodless cavity is extruded into the first oil way and returns to the supply pipeline, thereby realizing the opening and clamping of the back-up tong, the back-up tong hydraulic control system realizes the clamping and releasing functions of the back-up tong by using the energy accumulator on the premise of ensuring that the structure of the whole machine is not obviously changed, simultaneously meets the use requirements of a field hydraulic elevator, solves the actual problems on the field, expands the use mode and method of the energy accumulator, utilizes the energy accumulation function of the energy accumulator to realize the use of the double-acting oil cylinder in the, the using mode and the using method of the energy accumulator are expanded, the rotary oil duct is saved, and the original spare oil duct can meet the using requirement of the field hydraulic elevator.
It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation 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.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.
The present disclosure in accordance with certain embodiments described herein is not to be limited in scope by the specific aspects illustrated. As will be apparent to those skilled in the art, many modifications and variations are possible without departing from the spirit and scope of the disclosure. Functionally equivalent methods and apparatuses, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing description, within the scope of the present disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. The disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that this disclosure is not limited to particular methods, reagents, compounds, compositions or biological systems, which can, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A back-up tong hydraulic control system, comprising a back-up tong (40) and a supply line (30) for supplying oil to the back-up tong (40), further comprising:
a first oil passage (10), a first end of the first oil passage (10) is communicated with the supply pipeline (30), and a second end of the first oil passage (10) is communicated with a rodless cavity (41) of the back-up wrench (40);
a second oil path (20), wherein a first end of the second oil path (20) is communicated with a rod cavity (42) of the back-up wrench (40);
an accumulator (50), the accumulator (50) being in communication with a second end of the second oil passage (20);
the first oil path (10) has a first state in which the oil flows into the rodless chamber (41), and a second state in which the oil flows out from the interior of the rodless chamber (41) through the first oil path (10); in the case where the first oil passage (10) is in the first state, the hydraulic oil of the rod chamber (42) flows into the accumulator (50) through the second oil passage (20) to close the back-up tong (40); when the first oil passage (10) is in the second state, hydraulic oil of the accumulator (50) flows from the second oil passage (20) to the rod chamber (42) to open the backup tong (40).
2. Back-up tong hydraulic control system according to claim 1, further comprising a directional control valve arranged between the supply line (30) and the first oil passage (10) for controlling the flow of hydraulic oil from the first oil passage (10) into the rodless chamber (41).
3. Back-up tong hydraulic control system according to claim 2, characterized in that the feed line (30) comprises a flow line (31) and a return line (32), the directional valve having a first position and a second position, the return line (32) communicating with the first oil circuit (10) in the case of the directional valve being in the first position, and the flow line (31) communicating with the first oil circuit (10) in the case of the directional valve being in the second position.
4. Back-up tong hydraulic control system according to claim 2, characterized in that the directional valve is an explosion-proof electromagnetic directional valve (60).
5. The back-up tong hydraulic control system according to claim 1, further comprising a three-way rotary valve (80) and a pressure measuring joint line (70), the three-way rotary valve (80) being provided on the first oil passage (10), the three-way rotary valve (80) having a first rotational position where the first oil passage (10) is shut off, an end of the first oil passage (10) close to the supply line (30) communicates with the pressure measuring joint line (70), and a second rotational position where the first oil passage (10) is kept open.
6. The back-up tong hydraulic control system according to claim 1, further comprising a pressure measuring port (91) and a pilot operated check valve (92), wherein the pressure measuring port (91) is communicated with the first oil passage (10), the pilot operated check valve (92) is provided on the second oil passage (20), and the pressure measuring port (91) is used for controlling the pilot operated check valve (92).
7. Back-up tong hydraulic control system according to claim 1, characterized in that the supply line (30) is provided with a pressure relief valve (93).
8. Back-up tong hydraulic control system according to claim 1, characterized in that the rod chamber (42) and the rodless chamber (41) are filled with hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020706515.4U CN212672122U (en) | 2020-04-30 | 2020-04-30 | Back-up tong hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020706515.4U CN212672122U (en) | 2020-04-30 | 2020-04-30 | Back-up tong hydraulic control system |
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| Publication Number | Publication Date |
|---|---|
| CN212672122U true CN212672122U (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020706515.4U Active CN212672122U (en) | 2020-04-30 | 2020-04-30 | Back-up tong hydraulic control system |
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|---|---|
| CN (1) | CN212672122U (en) |
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- 2020-04-30 CN CN202020706515.4U patent/CN212672122U/en active Active
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