CN114183128B - Single-arm eccentric caliper - Google Patents
Single-arm eccentric caliper Download PDFInfo
- Publication number
- CN114183128B CN114183128B CN202210065572.2A CN202210065572A CN114183128B CN 114183128 B CN114183128 B CN 114183128B CN 202210065572 A CN202210065572 A CN 202210065572A CN 114183128 B CN114183128 B CN 114183128B
- Authority
- CN
- China
- Prior art keywords
- caliper
- rod
- support rod
- caliper body
- plate spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 238000009434 installation Methods 0.000 claims description 30
- 238000007790 scraping Methods 0.000 claims description 12
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 4
- 238000005381 potential energy Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/08—Measuring diameters or related dimensions at the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a single-arm eccentric caliper, which comprises a caliper main body, a first bow member, a detection assembly, a sealing assembly and at least two second bow members, wherein the number of the second bow members is not less than two; the first bow member is arranged along the axial extension direction of the caliper body, and one end of the first bow member is hinged with the caliper body; the detection assembly is arranged along the axial sliding of the caliper body and hinged with the other end of the first bow member. This single armed eccentric caliper adopts first bow member to drive detection component to measure the caliper through this eccentric caliper, and rethread seal assembly seals detection component and caliper main part, avoids well mud to get into inside the caliper main part and leads to the poor scheduling condition of measurement accuracy to take place, uses through first bow member of second bow member cooperation at last to improved the eccentric thrust of this eccentric caliper greatly and leaned on the power and make this eccentric caliper be convenient for overturn fast in the horizontal well, realize simple and convenient high accuracy measuring effect.
Description
Technical Field
The invention relates to the technical field of borehole diameter measuring equipment, in particular to a single-arm eccentric borehole diameter instrument.
Background
Caliper (caliper), the instrument that measures the diameter of the borehole, has mainly two kinds of structures: one is Zhang Beishi caliper which makes individual caliper measurements; another is to use the leaning arm (such as a densimeter, a borehole wall neutron logging instrument or a micro-lateral instrument) of some logging instruments to measure the logging of the instruments at the same time, the conventional borehole diameter logging instrument mainly comprises four arms and six arms, the instrument needs to measure centrally, a complex power transmission mechanism is usually arranged in the instrument, hydraulic oil is filled in the instrument and a pressure balancing mechanism is added in the instrument to ensure the internal and external pressure balance of the instrument, so that the instrument structure is generally complex, and the instrument length, weight and research, development and manufacturing costs are correspondingly increased.
When the well diameter is measured, the instrument is put into the predicted depth of the well, the well diameter arm stretches outwards under the action of spring force, the tail end of the well diameter arm is clung to the well wall, the well diameter arm is expanded and contracted due to the change of the well diameter along with the upward lifting of the instrument, the connecting rod is driven to move up and down, the connecting rod is connected with the sliding end of a potentiometer, the change of the well diameter can be converted into the change of resistance, the change of resistance can be converted into the change of voltage after a certain voltage is applied to the two ends of the potentiometer, and finally the change of resistance is processed into a well diameter curve through ground software, so that the size of the well diameter is indirectly reflected.
The traditional caliper is easy to cause the condition that the caliper arm passes over a threshold and deforms when meeting resistance to cause poor measurement accuracy in the use process, so that the single-arm eccentric caliper is provided to solve the problems.
Disclosure of Invention
In view of the above, the invention provides a single-arm eccentric caliper with novel structure and high measurement precision.
The technical scheme of the invention is realized as follows: the invention provides a single-arm eccentric caliper, which comprises a caliper main body, a first bow member, a detection assembly, a sealing assembly and at least two second bow members, wherein the number of the second bow members is not less than two;
The first bow member is arranged along the axial extension direction of the caliper body, and one end of the first bow member is hinged with the caliper body;
The detection assembly is axially arranged in a sliding manner along the caliper main body and is hinged with the other end of the first bow member;
The sealing assembly is arranged in the caliper body and seals a gap between the detection assembly and the caliper body;
The second bow members are arranged along the axial extension direction of the caliper body, and the center surface of the first bow members is used as a symmetrical surface to be symmetrically distributed on the caliper body.
On the basis of the technical scheme, preferably, the first bow member comprises a first supporting rod, a first plate spring and a second supporting rod; the first supporting rod is hinged to the caliper main body; the first plate spring is arranged at one end of the first support rod, which is far away from the caliper body; the second support rod is arranged at one end of the first plate spring far away from the first support rod, and one end of the second support rod far away from the first plate spring is hinged with the detection assembly; the lengths of the first supporting rod and the second supporting rod are equal.
Still further preferably, the first support rod and the second support rod are close to the one end of the first leaf spring and all offer the mounting groove with first leaf spring looks adaptation, and first support rod and second support rod all support each other with the side that the first leaf spring is close to the caliper body and the side that keeps away from the caliper body.
Still further preferably, the detection assembly comprises a slider, a travel limit pin and a detection rod; the sliding block is axially arranged in the caliper body in a sliding manner along the caliper body, the sliding block is hinged with the second supporting rod, and a first clamping groove is formed in the sliding block; the stroke limiting pin is arranged on the sliding block and propped against the caliper main body; the detection rod is axially arranged in the caliper body along the caliper body, a second clamping groove matched with the first clamping groove is formed in the outer wall of the detection rod, the side surface of the sliding block, which is far away from the first support rod, abuts against the radial surface of the detection rod, a gap is formed between the side surface of the sliding block, which is close to the first support rod, and the detection rod, and a gap is formed between the axial surface of the detection rod and the sliding block.
Still more preferably, the detection rod includes a push rod and potentiometer assembly; the push rod is axially arranged in a sliding manner along the caliper body and is propped against the side surface of one side, far away from the first support rod, of the slide block, and a first installation cavity matched with the push rod is formed in the caliper body; the potentiometer assembly is arranged in the caliper body and is propped against one end of the first supporting rod far away from the push rod, and a second installation cavity matched with the potentiometer assembly is formed in the caliper body.
Still more preferably, the potentiometer assembly comprises a guide cylinder, a potentiometer, a pressure spring and a top block; the guide cylinder is arranged in the second installation cavity and is positioned at one side of the push rod far away from the first support rod; the potentiometer is axially arranged in the guide cylinder in a sliding manner along the caliper main body; the top block is arranged on the potentiometer and props against the push rod; the pressure spring is arranged on the guide cylinder and props against the ejector block.
Still further preferably, the sealing assembly comprises two guide sleeves, a first sealing ring, a second sealing ring and a baffle ring; the guide sleeves are coaxially arranged with the push rod, and the two guide sleeves are respectively positioned at ports of the first installation cavity and the second installation cavity and are used for plugging the first installation cavity and the second installation cavity; the first sealing ring is arranged on the periphery of the guide sleeve and fills a gap between the guide sleeve and the caliper body; the second sealing ring is arranged on the inner wall of the guide sleeve and fills a gap between the guide sleeve and the push rod; the baffle ring is arranged in the guide sleeve and is positioned at one side of the second sealing ring away from the second clamping groove, and the second sealing ring is propped against the baffle ring; a communication cavity communicated with the first installation cavity and the second installation cavity is formed in the caliper body.
Still more preferably, the guide sleeve comprises a sealing sleeve and a mud scraping ring; the mud scraping ring is sleeved on the push rod; the sealing sleeve is coaxially arranged with the push rod and is positioned at the periphery of the mud scraping ring, a first groove matched with the second sealing ring and the baffle ring is formed in the sealing sleeve, and a second groove matched with the first sealing ring is formed in the outer wall of the sealing sleeve.
Still further preferably, the second bow member includes a third support bar, a second leaf spring, and a fourth support bar; the third support rod is hinged on the caliper body and is positioned at one side of the caliper body close to the first plate spring, and the third support rod is symmetrically distributed at two sides of the first plate spring by taking the central surface of the first plate spring as a symmetry axis; the second plate spring is arranged at one end of the third support rod, which is far away from the caliper body; the fourth supporting rod is arranged at one end of the second plate spring, which is far away from the third supporting rod, one end of the fourth supporting rod, which is far away from the second plate spring, is in sliding connection with the caliper body, and the fourth supporting rod is positioned at one side of the third supporting rod, which is far away from the first supporting rod; the third support rod and the fourth support rod are equal in length, and the fourth support rod is smaller than the first support rod in length.
Still further preferably, the included angle between the central surfaces of the two third support rods and the central surface of the first support rod is equal and acute.
Compared with the prior art, the invention has the following beneficial effects:
(1) The eccentric caliper adopts the first bow member to drive the detection assembly to measure the caliper, then the detection assembly and the caliper main body are sealed through the sealing assembly, the conditions of poor measurement precision and the like caused by mud in a well entering the caliper main body are avoided, and finally the second bow member is matched with the first bow member for use, so that the eccentric pushing force of the eccentric caliper is greatly improved, the eccentric caliper is convenient to quickly overturn in a horizontal well, and the effects of simplicity, convenience and high-precision measurement are realized;
(2) The first bow member adopts the three-section structure of the first support rod, the first plate spring and the second support rod, so that the first bow member has a large span, and meanwhile, the two ends are supported and propped against through the first support rod and the second support rod, the condition that the measuring precision is influenced due to the fact that the first plate spring is easy to deform and damage in the process of passing a threshold in a well due to overlarge span is avoided, the first plate spring is positioned and supported through the mounting grooves on the first support rod and the second support rod, and the condition that the measuring precision is influenced due to the fact that the joint of the first plate spring and the first support rod is easy to break or damage due to single stress points between the first plate spring and the second support rod is avoided;
(3) The sliding block on the detection component is arranged at intervals with the axial surface of the detection rod, and a gap is reserved between the sliding block and the radial surface of one side of the detection rod and between the sliding block and the radial surface of the other side of the detection rod, so that the radial acting force is greatly reduced when the sliding block axially pushes the detection rod, the detection rod is matched with the potentiometer component for use, and the situation that the potentiometer component is influenced by the radial force and the measurement precision is further avoided due to the fact that the sliding block directly acts with the potentiometer component; finally, the potentiometer is guided and positioned through a guide cylinder on the potentiometer assembly, so that the situations of poor measurement precision and the like caused by deflection of the potentiometer in the measurement process are avoided, and meanwhile, a pressure spring on the potentiometer assembly drives a jacking block to prop against a push rod, so that the radial surface of the push rod is always propped against a slide block, and the situations of poor measurement precision and the like caused by overlarge gap between the push rod and the slide block are avoided;
(4) The gap between the guide sleeve and the push rod and the gap between the guide sleeve and the main body of the caliper are respectively sealed through the first sealing ring and the second sealing ring on the sealing assembly, meanwhile, the second sealing ring is pressed and limited through the baffle ring, the condition that the measuring precision is affected because mud enters the main body of the caliper due to axial movement of the push rod in the measuring process is avoided, and the condition that the measuring precision is affected because mud on the push rod is gathered is avoided by timely cleaning the mud on the push rod through the mud scraping ring;
(5) The third supporting rod, the second plate spring and the fourth supporting rod are matched for use through the second bow member, the lengths of the third supporting rod and the fourth supporting rod are equal to each other and smaller than that of the first supporting rod, so that the pushing force of the eccentric caliper is greatly increased, the two sides of the first supporting rod are symmetrically distributed through the two third supporting rods, an included angle between the third supporting rods and the central surface of the first supporting rod is an acute angle, the acting force angles of the two second bow members and the first bow member to the caliper body are equal, the caliper body is convenient to accurately stop and measure in the measuring process, and the measuring accuracy of the eccentric caliper is further improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a structural exploded view of a single arm eccentric caliper of the present invention;
FIG. 2 is a perspective view of the structure of a single arm eccentric caliper of the present invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a right side cross-sectional view of the structure of a single arm eccentric caliper of the present invention and an enlarged view at B;
FIG. 5 is a front cross-sectional view of the structure of a single arm eccentric caliper and a perspective view of the sensing assembly of the present invention;
FIG. 6 is a perspective view of the structure of the potentiometer assembly of the present invention;
FIG. 7 is a structural rear cross-sectional view of a single arm eccentric caliper and a structural perspective view of a seal assembly of the present invention;
FIG. 8 is a structural elevational cross-section of the seal assembly of the present invention;
fig. 9 is a structural elevation view of a single arm eccentric caliper of the present invention.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
As shown in fig. 1, the single-arm eccentric caliper comprises a caliper body 1, a first bow member 2, a detection assembly 3, a sealing assembly 4 and not less than two second bow members 5.
The first bow member 2 is used for being matched with the caliper body 1 to elastically deform according to the size of the caliper, and driving the detection assembly 3 to adaptively act; specifically, the first bow member 2 is arranged along the axial extension direction of the caliper body 1, one end of the first bow member is hinged with the caliper body 1, and the other end is hinged with the detection assembly 3; the first bow member 2 and the caliper body 1 are propped against the well wall, one end of the first bow member 2 is hinged with the caliper body 1, the other end of the first bow member is hinged with the detection assembly 3, the detection assembly 3 can axially slide along the caliper body 1, the detection assembly 3 is driven to adaptively act and measure the caliper in the elastic deformation process of the first bow member 2, two ends of the first bow member 2 are respectively hinged with the caliper body 1 and the detection assembly 3, and the first bow member 2 is arc-shaped in the adjustment process, so that the condition that the measurement accuracy is poor due to deformation or damage caused by the fact that the threshold is encountered when the first bow member 2 is measured downwards or lifted upwards in the well is avoided, and the measurement accuracy of the eccentric caliper is improved.
In order to further improve the measurement accuracy of the eccentric caliper; specifically, the first bow member 2 includes a first support rod 21, a first plate spring 22 and a second support rod 23, the first support rod 21 is hinged on the caliper body 1, the first plate spring 22 is fixedly installed at one end of the first support rod 21 far away from the caliper body 1, the second support rod 23 is fixedly installed at one end of the first plate spring 22 far away from the first support rod 21, one end of the second support rod 23 far away from the first plate spring 22 is hinged with the detection component 3, the lengths of the first support rod 21 and the second support rod 23 are equal and are all hard alloy workpieces, as shown in fig. 2; the two ends of the first plate spring 22 are respectively supported by the first support rod 21 and the second support rod 23, so that the span of the first plate spring 22 is reduced, the integral deformation precision of the first bow member 2 is improved, and the condition that the measurement precision is poor due to inconsistent deformation amplitude caused by the fact that the first plate spring 22 passes a threshold and encounters resistance when the first plate spring 22 is measured underground or lifted up due to excessive softness is avoided.
In order to further improve the measurement accuracy of the eccentric caliper; specifically, as shown in fig. 3, the end of the first support rod 21, which is close to the first plate spring 22, and the end of the second support rod 23, which is close to the first plate spring 22, are both provided with a mounting groove a, the first plate spring 22 is movably mounted in the mounting groove a and fixed by a screw, the screw drives the end surface of the first support rod 21, which is close to the caliper body, and the end surface, which is far away from the caliper body, to clamp the first plate spring 22, and the end surface of the second support rod 23, which is close to the caliper body, and clamp the first plate spring 22, so that the stress area between the first plate spring 22 and the first support rod 21 and the second support rod 23 is increased, and the situation that the stress of the joint between the first plate spring 22 and the first support rod 21 and the second support rod 23 is uneven in the elastic deformation process causes breakage or damage to affect the measurement accuracy is avoided.
A detection assembly 3 for converting the acting force of the second support rod 23 into an axial acting force and measuring the well diameter; specifically, the detection assembly 3 includes a slider 31, a travel limit pin 32 and a detection rod 33, the slider 31 is axially slidably disposed inside the caliper body 1 along the caliper body 1 and hinged with the second support rod 23, a through hole matched with the second support rod 23 is formed on the outer wall of the caliper body 1, a first clamping groove b is formed inside the slider 31, the travel limit pin 32 is movably connected with the slider 31 through threads, the number of the travel limit pins 32 is not less than four, the travel limit pins 32 are symmetrically distributed on two sides of the central surface of the slider 31, the travel limit pins 32 are propped against the caliper body 1, a chute matched with the travel limit pin 32 is formed inside the caliper body 1, the detection rod 33 is movably mounted inside the caliper body 1 along the axial direction of the caliper body 1, a second clamping groove c matched with the first clamping groove b is formed on the outer wall of the detection rod 33, the radial surface of the detection rod 33 is propped against the side surface of the slider 31 on the side of the first support rod 21, a gap between the axial surface of the detection rod 33 and the slider 31 is provided with a gap between the side of the detection rod 31 and the side of the support rod 21 as shown in fig. 4; the side surface of the sliding block 31, which is far away from the first supporting rod 21, abuts against the radial surface of the detecting rod 33, meanwhile, the sliding block 31 is not contacted with the axial surface of the detecting rod 33, and the side surface of the sliding block 31, which is close to the first supporting rod 21, is not contacted with the radial surface of the detecting rod 33, so that the situation that the measuring precision is affected due to the fact that the sliding block 31 generates radial force when the detecting rod 33 is driven to axially move is avoided.
In order to further improve the measurement accuracy of the eccentric caliper; specifically, the detecting rod 33 includes a push rod 331 and a potentiometer assembly 332, the push rod 331 is slidably mounted in the caliper body 1 along the axial direction of the caliper body 1, the side surface of the slider 31 away from the first support rod 21 abuts against the radial surface of the push rod 331, a first mounting cavity d adapted to the push rod 331 is formed in the caliper body 1, the potentiometer assembly 332 is fixedly mounted in the caliper body 1, one end of the potentiometer assembly 332 close to the slider 31 abuts against the push rod 331, and a second mounting cavity e adapted to the potentiometer assembly 332 is formed in the caliper body 1, as shown in fig. 5; the detection rod 33 is matched with the potentiometer assembly 332 by adopting the push rod 331, so that the situation that the potentiometer assembly 332 is damaged or the measurement accuracy is poor due to the fact that the sliding block 31 directly acts with the potentiometer assembly 332 is avoided.
In order to further improve the measurement accuracy of the eccentric caliper; specifically, the potentiometer assembly 332 includes a guide cylinder x, a potentiometer y, a pressure spring z and a top block s, the guide cylinder x is fixedly installed in the inside of the caliper body 1 and is located at one side of the push rod 331 away from the first support rod 21, the potentiometer y is movably installed in the guide cylinder x, the potentiometer y can reciprocate along the axial extension direction of the caliper body 1, a chute matched with the potentiometer y is provided in the guide cylinder x, the top block s is fixedly installed at one end of the potentiometer y away from the guide cylinder x and abuts against the push rod 331, and the pressure spring z extending to the outer wall of the top block s is fixedly installed on the guide cylinder x, as shown in fig. 6; the ejector block s is driven to abut against the push rod 331 through the pressure spring z, so that the side surface of the side, far away from the first supporting rod 21, of the sliding block 31 always abuts against the radial surface of the push rod 331, the situation that the measuring accuracy is affected due to overlarge gap between the push rod 331 and the sliding block 31 is avoided, and meanwhile, the ejector block s drives the potentiometer y to adjust the position of the potentiometer y and the guide cylinder x and accurately measures the well diameter.
The sealing assembly 4 is used for sealing the first installation cavity d and the second installation cavity e, so that the condition that the measurement accuracy is affected by the axial acting force caused by the fact that mud in a well enters the inside of the caliper main body 1 is avoided; specifically, the sealing assembly 4 includes two guide sleeves 41, a first sealing ring 42, a second sealing ring 43 and a baffle ring 44, the two guide sleeves 41 are symmetrically sleeved on the outer wall of the push rod 331 and plug the first installation cavity d and the second installation cavity e, the two guide sleeves 41 are respectively located at two sides of the sliding block 31, the first sealing ring 42 is sleeved on the outer wall of the guide sleeve 41 and fills a gap between the guide sleeve 41 and the caliper body 1, the second sealing ring 43 is sleeved on the outer wall of the push rod 331 and located in the guide sleeve 41 and fills a gap between the push rod 331 and the guide sleeve 41, the baffle ring 44 is movably installed in the guide sleeve 41 and located at one side, away from the sliding block 31, of the second sealing ring 43, and a communication cavity f communicated with the first installation cavity d and the second installation cavity e is formed in the caliper body 1, as shown in fig. 7; through guide sleeve 41, first sealing washer 42 and second sealing washer 43 cooperation use and seal first installation cavity d and second installation cavity e, avoid well mud to get into first installation cavity d and second installation cavity e and produce axial effort to push rod 331 and lead to the poor condition of measurement accuracy to take place, the rethread keeps off ring 44 and carries out spacing to second sealing washer 43, avoid push rod 331 to lead to its and the condition of the not tight influence measurement accuracy of second sealing washer 43 seal in axial motion in-process to take place, first installation cavity d and second installation cavity e and communication cavity f form the inner loop cavity in caliper body 1 simultaneously, avoid push rod 331 to receive the inside atmospheric pressure effect to influence the condition of measurement accuracy to take place at axial motion in-process.
In order to further improve the measurement accuracy of the eccentric caliper; specifically, the guide sleeve 41 includes a sealing sleeve 411 and a mud scraping ring 412, the mud scraping ring 412 is sleeved on the outer wall of the push rod 331, the number of the mud scraping rings 412 is not less than two, the sealing sleeve 411 is fixedly installed on the outer wall of the mud scraping ring 412, the sealing sleeve 411 is fixedly connected with the caliper body 1 through bolts, a first groove matched with the second sealing ring 43 and the baffle ring 44 is formed in the inner wall of the sealing sleeve 411, and a second groove matched with the first sealing ring 42 is formed in the outer wall of the sealing sleeve 411, as shown in fig. 8; the sludge on the outer wall of the push rod 331 is cleaned through the sludge scraping ring 412, so that the conditions that the axial movement of the push rod 331 is influenced by the sludge on the push rod 331 to cause poor measurement accuracy and the like are avoided.
A second bow member 5 for increasing the eccentric urging force of the caliper body 1 and adjusting the center of gravity of the caliper body 1; specifically, the second bow member 5 is arranged along the axial extension direction of the caliper body 1, and the second bow member 5 is symmetrically distributed on the caliper body 1 by taking the central surface of the first plate spring 22 as the symmetrical surface; the eccentric pushing force of the caliper body 1 is increased through the cooperation of the second bow members 5 and the first plate springs 22, and when the eccentric caliper is applied to a horizontal well, the caliper body 1 is facilitated to stop rapidly and stably through the two second bow members 5, so that the condition that the measurement accuracy is poor due to the fact that a neutron meter or a density meter in the caliper body is difficult to turn over is avoided.
In order to further improve the measurement accuracy of the eccentric caliper; specifically, the second bow member 5 includes a third supporting rod 51, a second plate spring 52 and a fourth supporting rod 53, where the third supporting rod 51 is hinged on the caliper body 1, the third supporting rod 51 is located at two sides of the first plate spring 22 and symmetrically distributed with a central plane of the first plate spring 22 as a symmetrical plane, the second plate spring 52 is fixedly installed at one end of the third supporting rod 51 far away from the caliper body 1, the fourth supporting rod 53 is fixedly installed at one end of the second plate spring 52 far away from the second plate spring 52, one end of the fourth supporting rod 53 far away from the second plate spring 52 is slidably connected with the caliper body 1, a guide slot adapted to the fourth supporting rod 53 is provided on an outer wall of the caliper body 1, and lengths of the third supporting rod 51 and the fourth supporting rod 53 are equal and smaller than those of the first supporting rod 21, as shown in fig. 9; the two groups of third support rods 51, the second plate springs 52 and the fourth support rods 53 are matched with the first plate springs 22, so that eccentric stopping force of the eccentric caliper is increased, and the condition that measuring accuracy is affected due to unstable acting force in the eccentric stopping process of the eccentric caliper is avoided.
In order to further improve the measurement accuracy of the eccentric caliper; specifically, the included angle between the central plane of the two third supporting rods 51 and the central plane of the first supporting rod 21 is equal and the position is acute, when the eccentric caliper is applied to a horizontal well, the center of gravity of the eccentric caliper is located on the central plane of the first plate spring 22, and the third supporting rods 51, the second plate springs 52 and the fourth supporting rods 53 are symmetrically distributed on two sides of the caliper main body 1, so that the caliper main body 1 is convenient to quickly and accurately position.
The working principle of the technical scheme is as follows:
Firstly, placing the eccentric caliper into a caliper part to be measured;
When the eccentric caliper enters a narrower well from a wider well, the first plate spring 22 and the caliper main body 1 are in contact with the well wall, the first plate spring 22 is self-adaptively opened under the action of the well wall and generates elastic potential energy, the sliding block 31 is driven to be far away from the first supporting rod 21, meanwhile, the sliding block 31 drives the push rod 331 to prop against the top block s, the top block s drives the pressure spring z to compress and generate elastic potential energy, the top block s drives the potentiometer y to move opposite to the guide cylinder x, and the potentiometer y accurately measures the well diameter according to the contracted distance;
When the eccentric caliper enters a wider well from a narrower well, the first plate spring 22 releases elastic potential energy and is adaptively bent, the sliding block 31 is driven to be close to the first supporting rod 21, meanwhile, the pressure spring z releases the elastic potential energy and drives the top block s to prop against the push rod 331, the radial surface of the push rod 331 always props against the side surface, far away from the first supporting rod 21, of the sliding block 31, the top block s drives the potentiometer y to move away from the guide cylinder x, and the potentiometer y accurately measures the caliper according to the shrinkage distance.
In the technical scheme, how the potentiometer y measures the well diameter according to the telescopic distance is the prior art.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The utility model provides a single armed eccentric caliper, its includes caliper main part (1), its characterized in that: the device also comprises a first bow member (2), a detection assembly (3), a sealing assembly (4) and at least two second bow members (5);
The first bow member (2) is arranged along the axial extension direction of the caliper body (1), and one end of the first bow member is hinged with the caliper body (1);
The detection assembly (3) is axially arranged in a sliding manner along the caliper main body (1) and is hinged with the other end of the first bow member (2);
The sealing assembly (4) is arranged in the caliper body (1) and seals a gap between the detection assembly (3) and the caliper body (1);
The second bow parts (5) are arranged along the axial extension direction of the caliper body (1) and are symmetrically distributed on the caliper body (1) by taking the central surface of the first bow parts (2) as a symmetrical surface;
the first bow member (2) comprises a first support rod (21), a first leaf spring (22) and a second support rod (23);
The first supporting rod (21) is hinged to the caliper main body (1);
The first plate spring (22) is arranged at one end of the first support rod (21) far away from the caliper body (1);
the second support rod (23) is arranged at one end of the first plate spring (22) far away from the first support rod (21), and one end of the second support rod (23) far away from the first plate spring (22) is hinged with the detection assembly (3);
The lengths of the first supporting rod (21) and the second supporting rod (23) are equal;
The first support rod (21) and the second support rod (23) are provided with mounting grooves (a) which are matched with the first plate spring (22) at one ends close to the first plate spring (22), and the first support rod (21) and the second support rod (23) are mutually propped against the side surfaces of the first plate spring (22) close to and far from the caliper main body (1);
the second bow member (5) comprises a third support rod (51), a second leaf spring (52) and a fourth support rod (53);
The third support rod (51) is hinged to the caliper body (1) and is positioned on one side of the caliper body (1) close to the first plate spring (22), and the third support rod is symmetrically distributed on two sides of the first plate spring (22) by taking the central surface of the first plate spring (22) as a symmetry axis;
the second plate spring (52) is arranged at one end of the third support rod (51) far away from the caliper body (1);
The fourth supporting rod (53) is arranged at one end, far away from the third supporting rod (51), of the second plate spring (52), one end, far away from the second plate spring (52), of the fourth supporting rod (53) is in sliding connection with the caliper body (1), and the fourth supporting rod (53) is positioned at one side, far away from the first supporting rod (21), of the third supporting rod (51);
the lengths of the third supporting rod (51) and the fourth supporting rod (53) are equal, and the length of the fourth supporting rod (53) is smaller than that of the first supporting rod (21);
the included angles between the central surfaces of the two third support rods (51) and the central surface of the first support rod (21) are equal and acute.
2. The single arm eccentric caliper of claim 1, wherein: the detection assembly (3) comprises a sliding block (31), a travel limit pin (32) and a detection rod (33);
the sliding block (31) is axially and slidably arranged in the caliper body (1) along the caliper body (1), the sliding block (31) is hinged with the second supporting rod (23), and a first clamping groove (b) is formed in the sliding block (31);
The travel limiting pin (32) is arranged on the sliding block (31) and is propped against the caliper main body (1);
The detection rod (33) is axially arranged in the caliper body (1) along the caliper body (1), a second clamping groove (c) matched with the first clamping groove (b) is formed in the outer wall of the detection rod (33), the side surface of the slider (31) on the side far away from the first support rod (21) abuts against the radial surface of the detection rod (33), a gap is formed between the side surface of the slider (31) on the side close to the first support rod (21) and the detection rod (33), and a gap is formed between the axial surface of the detection rod (33) and the slider (31).
3. A single arm eccentric caliper as defined in claim 2, wherein: the detection rod (33) comprises a push rod (331) and a potentiometer assembly (332);
The push rod (331) is axially arranged in a sliding manner along the caliper main body (1) and is propped against the side surface of the slide block (31) away from the first support rod (21), and a first installation cavity (d) matched with the push rod (331) is formed in the caliper main body (1);
The potentiometer assembly (332) is arranged in the caliper body (1) and is propped against one end of the first supporting rod (21) far away from the push rod (331), and a second installation cavity (e) matched with the potentiometer assembly (332) is formed in the caliper body (1).
4. A single arm eccentric caliper as defined in claim 3, wherein: the potentiometer assembly (332) comprises a guide cylinder (x), a potentiometer (y), a pressure spring (z) and a top block(s);
the guide cylinder (x) is arranged in the second installation cavity (e) and is positioned at one side of the push rod (331) far away from the first support rod (21);
the potentiometer (y) is axially arranged in the guide cylinder (x) in a sliding manner along the caliper main body (1);
the ejector block(s) is arranged on the potentiometer (y) and is propped against the push rod (331);
the pressure spring (z) is arranged on the guide cylinder (x) and props against the ejector block(s).
5. A single arm eccentric caliper as defined in claim 3, wherein: the sealing assembly (4) comprises two guide sleeves (41), a first sealing ring (42), a second sealing ring (43) and a baffle ring (44);
The guide sleeves (41) and the push rod (331) are coaxially arranged, and the two guide sleeves (41) are respectively positioned at the ports of the first installation cavity (d) and the second installation cavity (e) and are used for blocking the first installation cavity (d) and the second installation cavity (e);
The first sealing ring (42) is arranged on the periphery of the guide sleeve (41) and fills a gap between the guide sleeve (41) and the caliper body (1);
the second sealing ring (43) is arranged on the inner wall of the guide sleeve (41) and fills a gap between the guide sleeve (41) and the push rod (331);
The baffle ring (44) is arranged in the guide sleeve (41) and is positioned at one side of the second sealing ring (43) far away from the second clamping groove (c), and supports the second sealing ring (43);
A communication cavity (f) communicated with the first installation cavity (d) and the second installation cavity (e) is formed in the caliper body (1).
6. The single arm eccentric caliper of claim 5, wherein: the guide sleeve (41) comprises a sealing sleeve (411) and a mud scraping ring (412);
the mud scraping ring (412) is sleeved on the push rod (331);
The sealing sleeve (411) is coaxially arranged with the push rod (331) and is positioned at the periphery of the mud scraping ring (412), a first groove matched with the second sealing ring (43) and the baffle ring (44) is formed in the sealing sleeve (411), and a second groove matched with the first sealing ring (42) is formed in the outer wall of the sealing sleeve (411).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065572.2A CN114183128B (en) | 2022-01-20 | 2022-01-20 | Single-arm eccentric caliper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065572.2A CN114183128B (en) | 2022-01-20 | 2022-01-20 | Single-arm eccentric caliper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114183128A CN114183128A (en) | 2022-03-15 |
| CN114183128B true CN114183128B (en) | 2024-04-19 |
Family
ID=80545752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210065572.2A Active CN114183128B (en) | 2022-01-20 | 2022-01-20 | Single-arm eccentric caliper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114183128B (en) |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA503671A (en) * | 1954-06-15 | J. Eastman Harlan | Well calipers | |
| CA884967A (en) * | 1971-11-02 | Walter E. Cubberly, Jr. | Well-calipering apparatus | |
| US3978924A (en) * | 1975-10-28 | 1976-09-07 | Dresser Industries, Inc. | Hidden bow spring for calipers and centralizers |
| GB1501683A (en) * | 1974-04-09 | 1978-02-22 | Schlumberger Ltd | Borehole apparatus having cambered leaf springs for positioning the apparatus in the borehole |
| US4407157A (en) * | 1981-08-05 | 1983-10-04 | Dresser Industries, Inc. | Apparatus for measuring the diameter of a borehole |
| US4432143A (en) * | 1982-03-22 | 1984-02-21 | Dresser Industries, Inc. | Well logging apparatus |
| US5092056A (en) * | 1989-09-08 | 1992-03-03 | Halliburton Logging Services, Inc. | Reversed leaf spring energizing system for wellbore caliper arms |
| CN202596700U (en) * | 2012-01-18 | 2012-12-12 | 中国石油天然气集团公司 | Single sidewall contact device for micro-spherically focused tool |
| CN202731895U (en) * | 2012-07-18 | 2013-02-13 | 吉艾科技（北京）股份公司 | Plate spring storage type hole diameter logger |
| CN103256041A (en) * | 2013-05-10 | 2013-08-21 | 中国电子科技集团公司第二十二研究所 | Hole diameter instrument |
| WO2014035761A1 (en) * | 2012-08-29 | 2014-03-06 | Schlumberger Canada Limited | Wellbore caliper with maximum diameter seeking feature |
| CN203614099U (en) * | 2013-07-04 | 2014-05-28 | 北京环鼎科技有限责任公司 | Magnetic sensing borehole diameter tester |
| CN203626819U (en) * | 2013-12-25 | 2014-06-04 | 中国石油集团渤海钻探工程有限公司 | Caliper arm pushing and contracting device for dual caliper |
| CN203961960U (en) * | 2014-06-24 | 2014-11-26 | 东营市三恒石油装备有限责任公司 | Exempt from out arm-type calliper log instrument |
| CN204357426U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Cross drilling tool storage formula caliper logging instrument balanced structure |
| CN205100966U (en) * | 2015-11-04 | 2016-03-23 | 东营仪锦能源科技有限公司 | Cross four arm caliper survey appearance of drilling rod storage formula |
| CN106285510A (en) * | 2016-08-31 | 2017-01-04 | 中国船舶重工集团公司第七八研究所 | A kind of eccentric centralizer for geochemical well logging instrument |
| CN106321077A (en) * | 2015-07-02 | 2017-01-11 | 中石化石油工程技术服务有限公司 | Four-arm microelectrode measuring instrument for borehole diameters |
| CN109236271A (en) * | 2018-08-27 | 2019-01-18 | 中国石油天然气集团有限公司 | A kind of wireline logging underground pushing device |
| CN213743373U (en) * | 2020-08-19 | 2021-07-20 | 中国石油化工集团有限公司 | Novel high-temperature high-pressure compensation neutron logging instrument |
| CN216866670U (en) * | 2022-01-20 | 2022-07-01 | 武汉海阔科技有限公司 | Single-arm eccentric caliper |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7069775B2 (en) * | 2004-09-30 | 2006-07-04 | Schlumberger Technology Corporation | Borehole caliper tool using ultrasonic transducer |
| US7131210B2 (en) * | 2004-09-30 | 2006-11-07 | Schlumberger Technology Corporation | Borehole caliper tool |
| US8464791B2 (en) * | 2010-08-30 | 2013-06-18 | Schlumberger Technology Corporation | Arm system for logging a wellbore and method for using same |
| US9915144B2 (en) * | 2014-11-12 | 2018-03-13 | Baker Hughes, A Ge Company, Llc | Production logging tool with multi-sensor array |
-
2022
- 2022-01-20 CN CN202210065572.2A patent/CN114183128B/en active Active
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA503671A (en) * | 1954-06-15 | J. Eastman Harlan | Well calipers | |
| CA884967A (en) * | 1971-11-02 | Walter E. Cubberly, Jr. | Well-calipering apparatus | |
| GB1501683A (en) * | 1974-04-09 | 1978-02-22 | Schlumberger Ltd | Borehole apparatus having cambered leaf springs for positioning the apparatus in the borehole |
| US3978924A (en) * | 1975-10-28 | 1976-09-07 | Dresser Industries, Inc. | Hidden bow spring for calipers and centralizers |
| US4407157A (en) * | 1981-08-05 | 1983-10-04 | Dresser Industries, Inc. | Apparatus for measuring the diameter of a borehole |
| US4432143A (en) * | 1982-03-22 | 1984-02-21 | Dresser Industries, Inc. | Well logging apparatus |
| US5092056A (en) * | 1989-09-08 | 1992-03-03 | Halliburton Logging Services, Inc. | Reversed leaf spring energizing system for wellbore caliper arms |
| CN202596700U (en) * | 2012-01-18 | 2012-12-12 | 中国石油天然气集团公司 | Single sidewall contact device for micro-spherically focused tool |
| CN202731895U (en) * | 2012-07-18 | 2013-02-13 | 吉艾科技（北京）股份公司 | Plate spring storage type hole diameter logger |
| WO2014035761A1 (en) * | 2012-08-29 | 2014-03-06 | Schlumberger Canada Limited | Wellbore caliper with maximum diameter seeking feature |
| CN103256041A (en) * | 2013-05-10 | 2013-08-21 | 中国电子科技集团公司第二十二研究所 | Hole diameter instrument |
| CN203614099U (en) * | 2013-07-04 | 2014-05-28 | 北京环鼎科技有限责任公司 | Magnetic sensing borehole diameter tester |
| CN203626819U (en) * | 2013-12-25 | 2014-06-04 | 中国石油集团渤海钻探工程有限公司 | Caliper arm pushing and contracting device for dual caliper |
| CN203961960U (en) * | 2014-06-24 | 2014-11-26 | 东营市三恒石油装备有限责任公司 | Exempt from out arm-type calliper log instrument |
| CN204357426U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Cross drilling tool storage formula caliper logging instrument balanced structure |
| CN106321077A (en) * | 2015-07-02 | 2017-01-11 | 中石化石油工程技术服务有限公司 | Four-arm microelectrode measuring instrument for borehole diameters |
| CN205100966U (en) * | 2015-11-04 | 2016-03-23 | 东营仪锦能源科技有限公司 | Cross four arm caliper survey appearance of drilling rod storage formula |
| CN106285510A (en) * | 2016-08-31 | 2017-01-04 | 中国船舶重工集团公司第七八研究所 | A kind of eccentric centralizer for geochemical well logging instrument |
| CN109236271A (en) * | 2018-08-27 | 2019-01-18 | 中国石油天然气集团有限公司 | A kind of wireline logging underground pushing device |
| CN213743373U (en) * | 2020-08-19 | 2021-07-20 | 中国石油化工集团有限公司 | Novel high-temperature high-pressure compensation neutron logging instrument |
| CN216866670U (en) * | 2022-01-20 | 2022-07-01 | 武汉海阔科技有限公司 | Single-arm eccentric caliper |
Non-Patent Citations (3)
| Title |
|---|
| 5700单臂智能偏心器的设计与实现;陈敏;《中国优秀硕士论文全文库工程科技I辑》;20180615(第6期);全文 * |
| MSA6240机械推靠器的设计;石丽云;《石油仪器》;20080715(第4期);全文 * |
| 独立四臂井径仪推靠系统设计与研究;杜永波;《中国优秀硕士论文全文库工程科技I辑》;20210915(第9期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114183128A (en) | 2022-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201121621Y (en) | Hydraulic cylinder with built-in travel range testing apparatus | |
| CN216866670U (en) | Single-arm eccentric caliper | |
| CN114183128B (en) | Single-arm eccentric caliper | |
| CN104712319A (en) | Oil well gradient measuring device | |
| CN104033146B (en) | The oil well verticality measuring tool of convenient dismounting | |
| CN201322730Y (en) | Thermal shrinkage rate testing mechanism | |
| CN201314228Y (en) | Electric centralizer | |
| CN210829979U (en) | Novel structure capable of monitoring state of large-stroke hydraulic valve | |
| CN203867552U (en) | Oil well perpendicularity measurement tool convenient to detach | |
| CN115218081A (en) | Combined geophysical measuring probe | |
| CN109443619A (en) | Stretching force detecting apparatus and detection method between a kind of tension member | |
| CN110095092B (en) | Inclinometer based on fiber bragg grating and magnetostrictive material | |
| CN204851229U (en) | Structure is measured to stable form oil well gradient | |
| CN209163794U (en) | Core drilling floodometer | |
| CN216008479U (en) | Measuring device for well track | |
| CN216241598U (en) | Ultra-long stroke hydraulic cylinder with built-in sensor | |
| CN114165213A (en) | Self-adaptive well wall sticking device | |
| CN104790940A (en) | Auxiliary oil well perpendicularity measuring device | |
| CN219244582U (en) | Measuring device | |
| CN204591257U (en) | Oil well testing apparatus for verticality | |
| CN110701138A (en) | Novel structure capable of monitoring state of large-stroke hydraulic valve | |
| CN112878993A (en) | Plate spring type six-arm transfer caliper | |
| CN219992130U (en) | Road bridge engineering roughness detection device | |
| CN114252053B (en) | Length-variable inclinometer probe | |
| CN213828669U (en) | Adjustable automobile testing fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |