CN212477680U - In-hole in-situ test system - Google Patents
In-hole in-situ test system Download PDFInfo
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- CN212477680U CN212477680U CN202020797376.0U CN202020797376U CN212477680U CN 212477680 U CN212477680 U CN 212477680U CN 202020797376 U CN202020797376 U CN 202020797376U CN 212477680 U CN212477680 U CN 212477680U
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Abstract
The utility model discloses an downthehole normal position test system, including pipe cable winch, compound pipe cable, normal position tester and controller, the normal position tester includes afterbody sleeve, casing, sets up at test probe, the positioner of casing lower extreme and by lower supreme hydraulic cylinder device and the flowmeter of setting inside the casing, and compound pipe cable one end winding is on the pipe cable winch, the other end of compound pipe cable passes through the afterbody sleeve and is connected with positioner's upper end, positioner's lower extreme and casing are connected, the upper end of test probe is connected with hydraulic cylinder device's lower extreme, the oil-out of compound pipe cable is connected with the oil inlet of flowmeter, the oil-out of flowmeter is connected with hydraulic cylinder device's oil inlet. The utility model discloses a flowmeter realizes range finding function and adopts compound cable to realize the control to the positioner of normal position tester, simplifies the control of normal position tester, improves the reliability of work efficiency and each item data.
Description
Technical Field
The utility model relates to an ocean engineering reconnaissance field especially relates to an downthehole normal position test system.
Background
The prior investigation of the basic physical and mechanical properties of the seabed soil, the foundation bearing capacity and the like needs to be carried out before the construction of relevant ocean engineering facilities, and static sounding is an effective means for acquiring the properties of the seabed soil. With the continuous development of ocean resource development and utilization and ocean engineering construction, seabed soil static sounding is more and more widely applied in the fields of ocean geological survey and ocean engineering investigation.
Static sounding is to penetrate a probe into a seabed soil body at a quasi-static constant speed through a penetration device to obtain relevant test parameters of the soil body. At present, seabed static sounding technology mainly adopts equipment systems to form seabed static sounding which is simple and convenient to use and operate. The seabed penetration probe is located on the surface of the seabed through the penetration equipment, and then a probe rod with a probe at the front end is adopted to penetrate into the seabed soil body from the surface of the seabed through the penetration equipment.
Chinese patent No. CN110029646A discloses a downhole static sounding system, which comprises a probe, the drill bit, the drilling rod, injection mechanism, the oil line separator, the bearing head, the umbilical cable, axial positioner and speed measuring mechanism, the drilling rod bottom is equipped with the drill bit, inside is equipped with the probe, probe bottom connection probe, injection mechanism is connected on the top, the oil line separator is connected on injection mechanism top, bearing head and umbilical cable fixed connection are passed through on the oil line separator top, be equipped with axial positioner in the injection mechanism, the drilling rod inner wall seted up with axial positioner complex constant head tank. Adopt this static sounding system to drilling platform is the sounding benchmark, puts down deep static sounding probe along the intermediate hole of drilling rod, starts the penetration system, utilizes the drill bit to sweep away the soil layer that has tested after getting the data in a stroke, starts the slush pump simultaneously, the silt sanitization in with the drilling rod, but this patent still has the weak point: firstly, the lack of an effective speed limiting device and a distance measuring device results in low reliability of the tested data; secondly, a reliable communication means is lacked, so that the in-situ tester can be in an offline state in a deep sea environment; thirdly, the control device of the positioning device is too complex, increasing the cost of later maintenance.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an downthehole normal position test system, it can solve the problem that traditional static sounding device can't carry out effectual speed limit, control means is too complicated and appears the signal at the static sounding in-process easily and loses the antithetical couplet.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an in-hole in-situ test system comprises a pipe cable winch, a composite pipe cable, an in-situ tester and a controller, wherein the in-situ tester comprises a tail sleeve, a shell, a test probe arranged at the lower end of the shell, a positioning device, a hydraulic oil cylinder device and a flowmeter, wherein the hydraulic oil cylinder device and the flowmeter are arranged in the shell from bottom to top; the hydraulic oil cylinder device is used for driving the test probe to move downwards; the flow meter is used for measuring the oil mass entering the hydraulic oil cylinder device so as to obtain the penetration depth of the in-situ tester; and the positioning device is used for clamping the interior of the drill rod so as to limit the position of the in-situ tester.
Preferably, the hydraulic cylinder device comprises a hydraulic pump and a hydraulic cylinder which are connected with the controller, the hydraulic cylinder comprises a hydraulic rod arranged in a rod cavity, a first cable arranged in an inner cavity of the hydraulic rod and a second cable arranged in a rodless cavity, an oil outlet of the flow meter is connected with an oil inlet of the hydraulic pump, an oil outlet of the hydraulic pump is connected with the rodless cavity of the hydraulic cylinder, a signal output end of the test probe is connected with the composite pipe cable sequentially through the first cable and the second cable, and the upper end of the test probe is connected with the hydraulic cylinder through the hydraulic rod.
Preferably, the second cable is a spring cable.
Preferably, the test device further comprises a one-way valve, wherein the one-way valve is arranged at one end of the rod cavity close to the test probe; the one-way valve is used for discharging liquid stored in the rodless cavity so as to control the penetration speed of the test probe.
Preferably, the composite pipe cable comprises an oil conveying pipe and a third cable, an oil outlet of the oil conveying pipe is connected with an oil inlet of the flowmeter, and a signal output end of the test probe is connected with the controller sequentially through the first cable, the second cable and the third cable.
Preferably, the third cable covers the outer surface of the oil pipeline.
Preferably, the system also comprises a pressure limiting valve, and the flowmeter is connected with the composite pipe cable through the pressure limiting valve.
Preferably, the positioning device comprises a jaw seat arranged at the upper end of the shell, a connecting plate, a first elastic unit, at least one jaw used for being clamped with the interior of the drill rod and a connecting rod movably connected in the jaw seat, the jaw seat is at least provided with a jaw groove arranged along the axial direction, the jaw is arranged in the jaw groove, the lower end of the jaw is movably connected with the jaw groove, one side, far away from the drill rod, of the upper end of the jaw is connected with the lower end of the connecting rod through the connecting plate, the upper end of the connecting rod sequentially penetrates through the first elastic element and the upper end of the jaw seat to be connected with the lower end of the tail sleeve, and one side, close to the drill rod, of the upper end of the jaw extends outwards to form jaw teeth; the composite pipe cable is used for driving the connecting rod to move upwards along the axial direction or move downwards along the axial direction; the connecting rod is used for driving the jaw teeth of the jaws to move back and forth between a first position and a second position; the first position is that the jaw teeth are separated from the interior of the drill rod; and the second position is a position where the jaw teeth are clamped with the interior of the drill rod.
Preferably, the clamping jaw further comprises a second elastic element, and the second elastic element is arranged between the lower end of the clamping jaw and the clamping jaw groove.
Compared with the prior art, the beneficial effects of the utility model reside in that: the flow meter is arranged at the oil inlet end of the hydraulic oil cylinder, the oil inlet amount of the hydraulic oil cylinder is obtained by the flow meter, further obtaining the penetration depth of the test probe, arranging a one-way valve in a rod cavity of the hydraulic oil cylinder for discharging liquid which is injected into the rod cavity in advance, so that when the rodless chamber applies pressure to the rod chamber, the liquid in the rod chamber provides an upward reaction force to the rodless chamber, thereby limiting the penetration speed of the test probe to a certain extent, simultaneously arranging the spring cable in the rodless cavity, ensuring the communication of the test probe during the static sounding test by utilizing the characteristic of elastic deformation of the spring cable, avoiding the problem of communication failure caused by over short cable and cable winding disorder, the oil inlet of the flowmeter is also provided with a pressure limiting valve which can protect the flowmeter from being damaged and limit the penetration speed of the test probe by limiting oil pressure; in addition, the connecting rod is driven to move upwards or downwards by the tension of the composite pipe cable and the elastic force of the first elastic element, so that the movement of the jaw teeth of the positioning device between the first position and the second position is controlled, and the rapid positioning of the in-situ tester is realized.
Drawings
Fig. 1 is a schematic structural view of an in-hole in-situ testing system according to the present invention.
Fig. 2 is an enlarged schematic view of a region G in fig. 1.
Fig. 3 is a sectional view taken along the direction F-F of fig. 1.
Fig. 4 is an enlarged schematic view of the area a in fig. 3.
Fig. 5 is an enlarged schematic view of a region B in fig. 3.
Fig. 6 is an enlarged schematic view of the region C in fig. 3.
Fig. 7 is an enlarged schematic view of a region D in fig. 3.
Fig. 8 is an enlarged schematic view of region E in fig. 3.
Fig. 9 is a schematic structural view of a composite umbilical of the present invention.
Fig. 10 is a schematic structural view of the umbilical winch according to the present invention.
In the figure: 1-composite pipe cable; 11-an oil delivery pipe; 12-a third cable; 2-tail sleeve; 3-testing the probe; 4-a hydraulic cylinder device; 41-hydraulic pump; 42-a hydraulic oil cylinder; 421-rod cavity; 4211-hydraulic rod; 422-rodless cavity; 4221-a second cable; 5-a flow meter; 6-one-way valve; 7-a pressure limiting valve; 8-a positioning device; 81-jaw seat; 811-jaw slot; 82-connecting plates; 83-jaw; 831-pawl tooth; 84-a connecting rod; 85-a first elastic element; 86-a second elastic element; 9-an umbilical winch; 91-a capstan; 92-a guide.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention will be further described with reference to the accompanying drawings and specific embodiments:
in the invention, the in-hole in-situ test system is applied to geological exploration, and particularly in marine geophysical exploration engineering, the in-hole in-situ test system is more widely applied. Actually, the drilling ship needs to be navigated to a preset sea level in advance, the drilling ship is stopped at a guided position by anchoring positioning or dynamic positioning, then the seabed base is put downwards until the seabed base is submerged to the seabed, then the in-situ tester is put into a drill pipe between the drilling ship and the seabed base through a pipe cable winch 9 arranged on the ship, and finally the in-situ tester penetrates through the seabed base and starts to penetrate into the seabed for static sounding; preferably, a structure similar to a step shape is arranged inside the drill rod; meanwhile, hydraulic cylinders 42 manufactured according to standardized specifications are generally provided with two chambers: the rod chamber 421 and the rodless chamber 422 are used, in this embodiment, the hydraulic cylinder 42 described in this embodiment still uses this structure, in this embodiment, before the in-situ tester is lowered, an appropriate amount of liquid substance (e.g., water) is injected into the rod chamber 421 of the hydraulic cylinder 42, so that the volume of the rod chamber 421 is increased to a certain extent within a reasonable range; preferably, the composite pipe cable 1 comprises a petroleum pipeline 11 and a third cable 12 (as shown in fig. 9), wherein the third cable 12 covers the outer surface of the petroleum pipeline 11, and the third cable 12 is a cable for signal transmission and/or supplies power; preferably, in this embodiment, the drill pipe is disposed between the drilling vessel and the seabed base or in the seabed drilling hole, a structure similar to a step is disposed inside the drill pipe, and the pawl teeth 831 can be engaged with the inside of the drill pipe; preferably, the umbilical winch 9 includes a winch 91 and a guider 92, as shown in fig. 10, the winch 91 is used for winding the composite umbilical 1, and the guider 92 is used for controlling the lowering direction of the composite umbilical 1. In this embodiment, the test probe is not limited to a static cone penetration probe, but may be a variety of in-situ test devices or sampling equipment, such as a cross-plate shear apparatus and a cannula sampler.
The first embodiment is as follows:
as shown in fig. 1-10, in this embodiment, the in-hole in-situ testing system includes an umbilical winch 9, a composite umbilical 1, an in-situ tester and a controller, the in-situ tester includes a tail sleeve 2, a housing, a testing probe 3 disposed at a lower end of the housing, a positioning device 8, a hydraulic cylinder device 4 and a flow meter 5 disposed inside the housing from bottom to top, one end of the composite umbilical 1 is wound on the umbilical winch 9, the other end of the composite umbilical 1 is connected to an upper end of the positioning device 8 through the tail sleeve 2, preferably, a lower end of the positioning device 8 is connected to the housing, an upper end of the testing probe 3 is connected to a lower end of the hydraulic cylinder device 4, an oil outlet of the composite umbilical 1 is connected to an oil inlet of the flow meter 5, an oil outlet of the flow meter 5 is connected to an oil inlet of the hydraulic cylinder device 4, the umbilical winch 9, The composite umbilical 1, the flow meter 5 and the test probe 3 are connected to a controller.
In this embodiment, the positioning device 8 includes a jaw seat 81 disposed at the upper end of the housing, a connecting plate 82, at least one jaw 83 for engaging with the drill rod, and a connecting rod 84 movably connected in the jaw seat 81, the jaw seat 81 is provided with at least one jaw slot 811 disposed along the axial direction, the jaw 83 is disposed in the jaw slot 811, the lower end of the jaw 83 is movably connected with the jaw slot 811, the side of the upper end of the jaw 83 away from the drill rod is connected with the lower end of the connecting rod 84 through the connecting plate 82, the upper end of the connecting rod 84 sequentially passes through a first elastic element 85, the upper end of the jaw seat 81 is connected with the lower end of the tail sleeve 2, and the side of the upper end of the jaw 83 close to the drill rod extends outwards to form a jaw tooth 831; the composite umbilical 1 is used for driving the connecting rod 84 to move upwards in the axial direction or move downwards in the axial direction; the connecting rod 84 is used for driving the claw teeth 831 of the claw 83 to reciprocate between the first position and the second position; the first position is that the jaw teeth 831 are separated from the interior of the drill rod; the second position is a position where the jaw teeth 831 engage with the interior of the drill rod. Preferably, the jaw seat 81, the connecting rod 84, the first elastic element 85 is a spring; a second elastic element 86 is arranged between the lower end of the claw 83 and the claw groove 811, and the second elastic element 86 is a spring piece. When the in-situ tester reaches the seabed, the cable winch 9 stops rotating, the pulling force of the composite cable 1 on the connecting rod 84 is smaller than the acting force of the spring, the spring in the positioning device 8 starts to reset, the connecting rod 84 is driven to move downwards, so that the connecting rod 84 drives the claw teeth 831 to move towards the second position through the connecting plate 82 and is clamped with the interior of the drill rod, preferably, after the spring piece between the lower end of the claw 83 and the claw groove 811 does not provide upward pulling force for the in-situ tester through the composite cable 1 any more by the cable winch 9, the spring piece restores the free state (the spring piece in the free state is bent), and further drives the claw teeth 831 to move towards the second position. After static sounding is completed, the pipe cable winch 9 rotates reversely, the in-situ tester is lifted upwards through the composite pipe cable 1, at the moment, the pulling force of the composite pipe cable 1 on the connecting rod 84 is recovered, and is greater than the acting force of the spring, the spring in the positioning device 8 is compressed, the composite pipe cable 1 drives the connecting rod 84 to move upwards, a certain gap is formed between the upper end of the positioning device 8 and the tail sleeve 2, so that the connecting rod 84 drives the jaw teeth 831 to move towards the first position through the connecting plate 82, the jaw teeth 831 are separated from the inside of the drill rod, and the spring piece is pulled to be in a straight state from a bending state (a free state).
In this embodiment, the hydraulic cylinder device 4 includes a hydraulic pump 41 and a hydraulic cylinder 42 connected to the controller, the hydraulic cylinder 42 includes a hydraulic rod 4211 disposed in the rod chamber 421, a first cable disposed in an inner chamber of the hydraulic rod 4211, and a second cable 4221 disposed in the rodless chamber 422, an oil outlet of the flow meter 5 is connected to an oil inlet of the hydraulic pump 41, an oil outlet of the hydraulic pump 41 is connected to the rodless chamber 422 of the hydraulic cylinder 42, a signal output end of the test probe 3 is connected to the composite pipe cable 1 sequentially through the first cable and the second cable 4221, and an upper end of the test probe 3 is connected to the hydraulic cylinder 42 through the hydraulic rod 4211.
Specifically, an oil outlet of the oil delivery pipe 11 is connected with an oil inlet of the flowmeter 5, and a signal output end of the test probe 3 is connected with the controller sequentially through a first cable, a second cable 4221 and a third cable 12. When hydraulic cylinder device 4 orders about test probe 3 and pushes down and carry out the static sounding, hydraulic stem 4211 increases the degree of depth that test probe 3 penetrated the soil layer gradually, lead to the upper end of rodless chamber 422 and the distance between the lower extreme can draw greatly gradually (promptly rodless chamber 422's volume grow gradually, there is the volume of pole chamber 421 to diminish), so the length of the cable in rodless chamber 422 also lengthens thereupon, in order to avoid the cable in rodless chamber 422 to be pulled apart or the cable overlength appears and lead to the cable winding together to lead to the phenomenon of unable communication, so second cable 4221 is the spring cable, utilize the characteristic that can take place elastic deformation of spring cable to ensure test probe 3 and carry out the communication when surveying the static sounding, avoid the cable to cross short and the cable in disorder to lead to the problem of communication.
At the same time, the flow meter 5 will record the amount of oil entering the rodless chamber 422 of the hydraulic cylinder 42 via the hydraulic pump 41 and send the recorded data to the controller via the third cable 12, via the formula: vOil＝SCylinderH, (wherein V)OilFor the amount of oil flowing into the hydraulic cylinder 42, SCylinderThe cross-sectional area of the rodless cavity 422 of the hydraulic cylinder 42, and H is the penetration depth) to obtain the penetration depth of the test probe 3 into the soil layer.
Furthermore, a check valve 6 is disposed at one end of the rod chamber 421 near the test probe 3. In the static sounding process of the in-situ tester, the oil quantity entering the rodless cavity 422 of the hydraulic oil cylinder 42 is gradually increased, so that the volume of the rodless cavity 422 of the hydraulic oil cylinder 42 is gradually increased, the volume of the rod cavity 421 of the hydraulic oil cylinder 42 is forced to be gradually reduced, and the water which is injected into the rod cavity 421 in advance is discharged from the one-way valve 6. Specifically, according to the principle of the communicating vessel, after the in-situ tester enters the sea, if the rodless chamber 422 does not apply pressure to the rod chamber 421, water in the rod chamber 421 will not flow out, and the check valve 6 can be opened only when working pressure is reached, thereby preventing oil supply in the hydraulic oil circuit from being lost, and the hydraulic cylinder will generate uncontrolled displacement only under the combined action of oil gravity and leakage, and at the same time, when the in-situ tester performs static touch detection, the rodless chamber 422 applies pressure to the rod chamber 421, because water is injected into the rod chamber 421 in advance, water in the rod chamber 421 will provide an upward reaction force to the rodless chamber 422, until the pressure in the rod chamber 421 reaches the working pressure, water in the rod chamber 421 will not be discharged, and simultaneously, the pressure in the rod chamber 421 will be reduced, and when the pressure in the rod chamber 421 reaches the working pressure again, water in the rod chamber 421 will be discharged again, thereby limiting the speed of penetration of the test probe 3 to some extent.
Preferably, a pressure limiting valve 7 is further arranged at the oil inlet of the flowmeter 5, so as to protect the flowmeter 5 from being damaged and limit the penetration speed of the test probe 3 by limiting the oil pressure.
Example two:
as shown in fig. 1 to 9, an in-hole in-situ testing method applied to an in-hole in-situ testing system includes the following steps:
s1: injecting water into the rod chamber 421 of the hydraulic cylinder 42, so that the volume of the rod chamber 421 is increased to a preset degree;
specifically, before the in-situ tester is lowered, water (but not limited to water, and may be other liquid suitable for a deep sea environment) is injected into the rod cavity 421 of the hydraulic cylinder 42 on the drilling ship in advance, so that the volume of the rod cavity 421 of the hydraulic cylinder 42 is increased to a preset degree, and in an ideal state, the volume of the rod cavity 421 after water injection is maximized, and the volume of the rod-free cavity 422 corresponding to the hydraulic cylinder 42 is minimized.
S2: connecting the composite pipe cable 1 to an in-situ tester through a tail sleeve 2;
specifically, on passing through modes such as knob or centre gripping fixed connection normal position tester with compound umbilical 1 through afterbody sleeve 2, in this embodiment, the upper end of the casing of normal position tester is connected with positioner 8's lower extreme, so compound umbilical 1 is connected with positioner 8's upper end through afterbody sleeve 2.
S3: driving the pipe cable winch 9 to rotate in the forward direction, and lowering the in-situ tester into the drill pipe so that the in-situ tester is lowered to the seabed along the interior of the drill pipe;
specifically, in this embodiment, the forward rotation of the umbilical winch 9 is set as lowering the in-situ tester, and the reverse rotation of the umbilical winch 9 is set as lifting the in-situ tester upwards; the in situ tester is placed inside the drill pipe so that the in situ tester is lowered along the inside of the drill pipe to the seabed, and during the lowering, the umbilical winch 9 provides an upward pulling force to the in situ tester through the composite umbilical 1, and at this time, the in situ tester can be simply considered to be influenced only by gravity and the pulling force.
S4: the rotation of the umbilical winch 9 is stopped, and the first elastic element 85 in the positioning device 8 drives the link 84 to move downwards, so that the link 84 drives the jaw 831 to move to the second position through the connecting plate 82 and is clamped with the inside of the drill rod;
specifically, when the umbilical winch 9 stops rotating after the in-situ tester reaches the seabed, that is, the umbilical winch 9 no longer provides an upward pulling force to the in-situ tester through the composite umbilical 1, that is, the pulling force of the composite umbilical 1 to the connecting rod 84 is zero or the pulling force of the composite umbilical 1 to the connecting rod 84 is smaller than the acting force of the spring, the spring in the positioning device 8 starts to reset and drives the connecting rod 84 to move downward, so that the connecting rod 84 drives the pawl tooth 831 to move to the second position through the connecting plate 82 and to be engaged with the inside of the drill pipe, preferably, after the cable winch 9 no longer provides an upward pulling force to the in-situ tester through the composite umbilical 1, the spring between the lower end of the pawl 83 and the pawl groove 811 returns to the free state (the spring in the free state is bent), and further drives the pawl tooth 831 to move to the second position. In this embodiment, the jaw teeth 831 abutting against the drill rod provide a reaction force (the direction of the reaction force is downward along the axial direction), so as to limit the position of the in-situ tester, prevent the in-situ tester from moving upward, and enable the hydraulic cylinder device 4 to effectively press the test probe 3 into the soil layer. .
S5: the composite pipe cable 1 sequentially passes through the pressure limiting valve 7 and the flowmeter 5 to supply oil to the rodless cavity 422 of the hydraulic oil cylinder device 4, and the flowmeter 5 records the oil inlet amount of the rodless cavity 422 of the hydraulic oil cylinder device 4 so as to obtain the penetration depth of the test probe 3;
specifically, in the present embodiment, after the jaw teeth 831 of the positioning device 8 are engaged with the inside of the drill pipe, the oil pipe 11 of the composite umbilical 1 starts to supply oil and liquid to the hydraulic cylinder device 4Pressure oil passes through pressure limiting valve 7 in proper order, flowmeter 5 enters into hydraulic cylinder 42's rodless chamber 422, limit the oil pressure that gets into flowmeter 5 through pressure limiting valve 7, avoid flowmeter 5 to be damaged by high oil pressure, and the speed that the restriction test probe 3 penetrated, simultaneously, flowmeter 5 records hydraulic cylinder device 4's rodless chamber 422's oil feed rate, and send corresponding data to the controller through wireless or compound pipe cable 1's third cable 12, the controller passes through the formula: vOil＝SCylinderH, (wherein V)OilFor the amount of oil flowing into the hydraulic cylinder 42, SCylinderThe cross-sectional area of the rodless cavity 422 of the hydraulic cylinder 42, and H is the penetration depth) to obtain the penetration depth of the test probe 3 into the soil layer.
S6: the one-way valve 6 discharges the water in the rod chamber 421 to define the degree of reduction in volume of the rod chamber 421;
specifically, as the oil pipe 11 of the composite umbilical 1 is continuously supplied with oil, the volume of the rodless chamber 422 of the hydraulic cylinder 42 gradually increases, and the volume of the rod chamber 421 gradually decreases, so that the water previously injected into the rod chamber 421 is discharged from the check valve 6. Specifically, according to the principle of the communicating vessel, after the in-situ tester enters the sea, if the rodless chamber 422 does not apply pressure to the rod chamber 421, water in the rod chamber 421 will not flow out, and the check valve 6 can be opened only when working pressure is reached, thereby preventing oil supply in the hydraulic oil circuit from being lost, and the hydraulic cylinder will generate uncontrolled displacement only under the combined action of oil gravity and leakage, and at the same time, when the in-situ tester performs static touch detection, the rodless chamber 422 applies pressure to the rod chamber 421, because water is injected into the rod chamber 421 in advance, water in the rod chamber 421 will provide an upward reaction force to the rodless chamber 422, until the pressure in the rod chamber 421 reaches the working pressure, water in the rod chamber 421 will not be discharged, and simultaneously, the pressure in the rod chamber 421 will be reduced, and when the pressure in the rod chamber 421 reaches the working pressure again, water in the rod chamber 421 will be discharged again, thereby limiting the speed of penetration of the test probe 3 to some extent.
In this embodiment, when the volume of the rodless cavity 422 of the hydraulic cylinder 42 gradually increases, the distance between the upper end and the lower end of the rodless cavity 422 of the hydraulic cylinder 42 gradually increases due to the constant cross-sectional area of the rodless cavity 422 of the hydraulic cylinder 42, so that the spring cable in the rodless cavity 422 is gradually in a stretched state, and the problem of communication failure caused by too short cable and cable winding disorder is avoided. After the static sounding is completed, after the in-situ tester is lifted to a ship, water is injected into the rod cavity 421, so that the volume of the rod cavity 421 of the hydraulic oil cylinder 42 is increased to a preset degree, and at the moment, the spring cable gradually restores to the original state.
S7: the umbilical winch 9 is driven to rotate in the opposite direction and the umbilical 1 pulls the link 84 up in the positioning device 8 so that the link 84 via the link plate 82 drives the jaw 831 to the first position and away from the drill pipe interior.
Specifically, after the static sounding is completed, the pipe cable winch 9 rotates reversely, the in-situ tester is lifted upwards through the composite pipe cable 1, at this time, the pulling force of the composite pipe cable 1 on the connecting rod 84 is recovered, and is greater than the acting force of the spring, the spring in the positioning device 8 is compressed, the composite pipe cable 1 drives the connecting rod 84 to move upwards, a certain gap is formed between the upper end of the positioning device 8 and the tail sleeve 2, so that the connecting rod 84 drives the claw teeth 831 to move towards the first position through the connecting plate 82, the claw teeth 831 are separated from the inside of the drill rod, the spring piece is pulled to be in a straight state from a bending state (a free state), and the in-situ tester can be lifted to a ship through the pipe cable winch 9.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.
Claims (9)
1. An in-hole in-situ test system, characterized in that: the in-situ tester comprises a pipe cable winch, a composite pipe cable, an in-situ tester and a controller, wherein the in-situ tester comprises a tail sleeve, a shell, a test probe arranged at the lower end of the shell, a positioning device, a hydraulic oil cylinder device and a flowmeter which are arranged in the shell from bottom to top, one end of the composite pipe cable is wound on the pipe cable winch, the other end of the composite pipe cable is connected with the upper end of the positioning device through the tail sleeve, the lower end of the positioning device is connected with the shell, the upper end of the test probe is connected with the lower end of the hydraulic oil cylinder device, the oil outlet of the composite pipe cable is connected with the oil inlet of the flowmeter, the oil outlet of the flowmeter is connected with the oil inlet of the hydraulic oil cylinder device, and the pipe cable winch, the composite; the hydraulic oil cylinder device is used for driving the test probe to move downwards; the flow meter is used for measuring the oil mass entering the hydraulic oil cylinder device so as to obtain the penetration depth of the in-situ tester; and the positioning device is used for clamping the interior of the drill rod so as to limit the position of the in-situ tester.
2. The in-hole in-situ test system of claim 1, wherein: the hydraulic oil cylinder device comprises a hydraulic pump and a hydraulic oil cylinder which are connected with the controller, the hydraulic oil cylinder comprises a hydraulic rod arranged in a rod cavity, a first cable arranged in an inner cavity of the hydraulic rod and a second cable arranged in a rodless cavity, an oil outlet of the flow meter is connected with an oil inlet of the hydraulic pump, an oil outlet of the hydraulic pump is connected with the rodless cavity of the hydraulic oil cylinder, a signal output end of the test probe is connected with the composite pipe cable sequentially through the first cable and the second cable, and the upper end of the test probe is connected with the hydraulic oil cylinder through the hydraulic rod.
3. The in-hole in-situ test system of claim 2, wherein: the second cable is a spring cable.
4. The in-hole in-situ test system of claim 2, wherein: the test probe also comprises a one-way valve, and the one-way valve is arranged at one end of the rod cavity close to the test probe; the one-way valve is used for discharging liquid stored in the rodless cavity so as to control the penetration speed of the test probe.
5. The in-hole in-situ test system of claim 2, wherein: the composite pipe cable comprises an oil conveying pipe and a third cable, an oil outlet of the oil conveying pipe is connected with an oil inlet of the flowmeter, and a signal output end of the test probe is connected with the controller sequentially through the first cable, the second cable and the third cable.
6. The in-hole in-situ test system of claim 5, wherein: the third cable covers the outer surface of the oil pipeline.
7. The in-hole in-situ test system of claim 1, wherein: the flowmeter is connected with the composite pipe cable through the pressure limiting valve.
8. The in-hole in-situ test system of claim 1, wherein: the positioning device comprises a jaw seat arranged at the upper end of the shell, a connecting plate, a first elastic element, at least one jaw used for being clamped with the interior of the drill rod and a connecting rod movably connected in the jaw seat, the jaw seat is at least provided with a jaw groove arranged along the axial direction, the jaw is arranged in the jaw groove, the lower end of the jaw is movably connected with the jaw groove, one side, far away from the drill rod, of the upper end of the jaw is connected with the lower end of the connecting rod through the connecting plate, the upper end of the connecting rod sequentially penetrates through the first elastic element and the upper end of the jaw seat to be connected with the lower end of the tail sleeve, and one side, close to the drill rod, of the upper end of the jaw extends outwards to form jaw teeth; the composite pipe cable is used for driving the connecting rod to move upwards along the axial direction or move downwards along the axial direction; the connecting rod is used for driving the jaw teeth of the jaws to move back and forth between a first position and a second position; the first position is that the jaw teeth are separated from the interior of the drill rod; and the second position is a position where the jaw teeth are clamped with the interior of the drill rod.
9. The in-hole in-situ test system of claim 8, wherein: still include the second elastic element, the second elastic element sets up between the lower extreme of jack catch and the jack catch groove.
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| CN115992697A (en) * | 2023-03-24 | 2023-04-21 | 中海油田服务股份有限公司 | Side pressure testing system and side pressure testing method |
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| CN115992697A (en) * | 2023-03-24 | 2023-04-21 | 中海油田服务股份有限公司 | Side pressure testing system and side pressure testing method |
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