CN104033118A - Tool and method for preventing fall in well - Google Patents
Tool and method for preventing fall in well Download PDFInfo
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- CN104033118A CN104033118A CN201410274609.8A CN201410274609A CN104033118A CN 104033118 A CN104033118 A CN 104033118A CN 201410274609 A CN201410274609 A CN 201410274609A CN 104033118 A CN104033118 A CN 104033118A
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- spring
- counterweight
- slip
- urceolus
- connecting head
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Abstract
The invention discloses a tool and a method for preventing fall in a well. The tool comprises an upper connecting head having an oil pipe internal thread and a dovetail groove conical surface, one-way blocks accommodated in the dovetail groove conical surface and capable of relatively moving along the dovetail groove conical surface, a block base capable of pushing the one-way blocks to upwards move, an intermediate connecting head positioned below the upper connecting head, a mandrel arranged between the upper connecting head and the intermediate connecting head and used for bridging the upper connecting head and the intermediate connecting head, an outer barrel connected with the intermediate connecting head at the upper end and used for accommodating counterweight steels inside, and a lower connecting head connected with the lower end of the outer barrel. When a pipe column is normally produced, the tool dose not anchor a casing; only when the pipe column suddenly falls in the well, the anchoring is started to prevent the continuous descending of the pipe column, and the casing and the pipe column are effectively protected; the weightlessness and the hydraulic power are dually started; the mechanical structure is simple, and is not invalid for a long time in the well; and when the pipe column is out of control to fall in the well, the starting is rapid, and the support is reliable, so that the anchoring is easily relieved.
Description
Technical field
The present invention relates to a kind of anti-lost tool and method.
Background technology
Along with advancing by leaps and bounds of oilfield exploitation technology, horizontal well and high angle hole are more and more, because horizontal well and high angle hole are in high angle hole section overhaul difficulty, thereby require more and more higher to the anti-fall well of tubing string, the conventional anti-lost tool of anchoring type mostly is tubing anchor class instrument,, in use, there is following defect in just grappling in the time that flow string is worked: 1, just grappling in the time that flow string is worked, has damaged sleeve pipe to a certain extent; 2, the risk that its anchor mechanism exists unfreezing difficulty or is stuck after down-hole works long hours; 3, tubing string is disconnected falls behind, and its anchor mechanism easy damaged is also stuck, causes tubing string to propose.
Summary of the invention
The object of this invention is to provide a kind of for preventing anti-lost tool and the method for pipe column falling well; can in the time that tubing string fracture suddenly in top is descending rapidly, utilize loss-in-weight and hydraulic shock to start rapidly grappling supporting mechanism; supporting sleeve fast; and produce enough large resistances; to prevent that tubing string from continuing to fall to causing engineering accident, be widely used in the tubing string of horizontal well, high angle hole out of control fall well protection.
For achieving the above object, the present invention adopts following technical scheme: a kind of anti-lost tool, it comprise have oil pipe internal thread and the dovetail groove conical surface top connection, the one-way slip that can relatively move along the dovetail groove conical surface, can promote the up slip spider of one-way slip, the axle, the upper end that are positioned at transition joint, bridge joint top connection and the transition joint of top connection below is connected transition joint and urceolus, the lower contact that upper end is connected with urceolus of counterweight steel accommodated in inside and accommodate said elements and with the fixing sleeve pipe of one-way slip selective erase.
On the basis of technique scheme, further comprise following attached technical scheme:
It relies on elastic force help the back-moving spring that slip spider and one-way slip reset and be arranged on the connection of thread up and down of axle and prevent that screw thread from moving back the steady nail of buckleing while further comprising the wearing bush that is arranged between axle and slips, instrument unfreezing, wherein back-moving spring is enclosed within axle and is positioned at slip spider.
Sand control screens and support bar are installed in described transition joint, on counterweight steel, be provided with for reducing with urceolus friction and roller that can axially-movable and being set in its end and the counterweight spring of axial elastic force is provided, and in urceolus, be provided with the spring base of fixed weight spring, for the O shape circle between Packing spring seat and outer tube inner chamber with for by temporary transient fixing active shear pin between spring base and urceolus, wherein spring base is seated in the lower contact of hollow out, and one end of support bar is on back-moving spring and the other end is resisted against on counterweight steel.
It further comprises the protective jacket being arranged between support bar and transition joint, and wherein the number of one-way slip and support bar is more than three, and roller is more than two.
Described top connection, one-way slip, slip spider, axle, wearing bush, back-moving spring, support bar composition grappling supporting mechanism, and described counterweight steel, counterweight spring, roller form weightless feedback mechanism, and the lower contact composition fluid power auxiliary body of sand control screens in described transition joint, urceolus, spring base, O shape circle, active shear pin, hollow out.
The present invention also provides a kind of method of anti-fall well, it comprises a kind of anti-lost tool, it comprises the top connection with oil pipe internal thread and the dovetail groove conical surface, close in the dovetail groove conical surface and the one-way slip that can relatively move along the dovetail groove conical surface, can promote the up slip spider of one-way slip, be positioned at the transition joint of top connection below, the axle of bridge joint top connection and transition joint, upper end connects transition joint and inner urceolus of accommodating counterweight steel, and the lower contact that is connected with urceolus of upper end, wherein under normal circumstances, counterweight spring and one-way slip are in shrinking armed state, and back-moving spring is in expansion state, one-way slip and sleeve pipe are separated from each other, wherein the elastic force of counterweight spring equals whole gravity of counterweight steel, fall rapidly in well situation tubing string is out of control, counterweight steel reduces because of weightlessness gravity, and counterweight spring and one-way slip are in expansion state, and one-way slip is fixed with the mutual friction of sleeve pipe phase, the elastic force of counterweight spring is greater than the gravity of counterweight steel, and promotes the up and compression reseting spring of counterweight steel.
Preferably, it relies on elastic force help the back-moving spring that slip spider and slips reset and be arranged on the connection of thread up and down of axle and prevent that screw thread from moving back the steady nail of buckleing while further comprising the wearing bush that is arranged between axle and slips, instrument unfreezing, wherein back-moving spring is enclosed within axle and is positioned at slip spider.
Preferably, sand control screens and support bar are installed in described transition joint, on counterweight steel, be provided with for reducing with the roller of urceolus friction and being set in the counterweight spring of its end, and in urceolus, be provided with the spring base of fixed weight spring, for the O shape circle between Packing spring seat and outer tube inner chamber with for by active shear pin fixing between spring base and urceolus, wherein spring base is seated in the lower contact of hollow out, and one end of support bar is on back-moving spring and the other end is resisted against on counterweight steel.
Preferably, described top connection, one-way slip, slip spider, axle, wearing bush, back-moving spring, support bar composition grappling supporting mechanism, and described counterweight steel, counterweight spring, roller form weightless feedback mechanism, and the lower contact composition fluid power auxiliary body of sand control screens in described transition joint, urceolus, spring base, O shape circle, active shear pin, hollow out.
Preferably, fall well and anti-lost tool rapidly below liquid level time tubing string is out of control, between urceolus and sleeve pipe there is throttling action in gap, and produce surge in spring base bottom, and it is up to promote spring base, counterweight spring, counterweight steel, support bar, slip spider, until promote the up hole enlargement supporting sleeve of one-way slip, back-moving spring is compressed simultaneously.
Advantage of the present invention is:
1, when tubing string is normally produced, not grappling sleeve pipe only just starts grappling in the time that tubing string falls suddenly well, prevents that tubing string from continuing descending, has effectively protected tubing string and sleeve pipe;
2, weightless, fluid power double starting, frame for movement is simple, can not lose efficacy for a long time in down-hole;
3, fall to starting when well rapidly tubing string is out of control, support reliably, easily remove grappling.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the sectional view of the present invention in the time of normal production;
To be the present invention fall when well and be positioned at sectional view more than liquid level in out of control Fig. 2 rapidly;
To be the present invention fall when well and be positioned at the sectional view below liquid level in out of control Fig. 3 rapidly.
Detailed description of the invention
Embodiment: as Figure 1-3, the invention provides a kind of specific embodiment of anti-lost tool, for preventing pipe column falling well, wherein tubing string refers to the whole oil pipes and all instruments that are positioned on anti-lost tool.Anti-lost tool of the present invention comprises the top connection 1 with oil pipe internal thread and the dovetail groove conical surface, close in the dovetail groove conical surface and the one-way slip 2 that can relatively move along the dovetail groove conical surface, can promote the up slip spider of one-way slip 24, be positioned at the transition joint 9 of top connection 1 below, the axle 5 of bridge joint top connection 1 and transition joint 9, the wearing bush 3 of installing between axle 5 and one-way slip 2, upper end connects transition joint 9 and inner urceolus 13 of accommodating counterweight steel 14, the lower contact 19 that upper end is connected with urceolus 13, and be axially set in top connection 1, transition joint 9, urceolus 13, lower contact 19 outsides and with the fixing sleeve pipe 21 of one-way slip 2 selective erases of top connection 1.Wherein top connection 1, transition joint 9 and lower contact 19 threes are axially connected and are housed in sleeve pipe 21.The top connection 1 built-in oil pipe internal thread in top is also connected with top tubing string, and outside, bottom is processed with the dovetail groove conical surface, and conical surface diameter diminishes gradually from top to bottom, and top connection 1 lower lumen is connected with axle 5 through screw thread; Three above one-way slip 2 upper ends are stuck in the dovetail groove conical surface outside top connection 1, outside is processed with unidirectional external tooth 22, when external tooth 22 and sleeve pipe 21 are rubbed, only allow one-way slip 2 upwards to relatively move, the lower end of one-way slip 2 is stuck in the T-slot of slip spider 4; Wearing bush 3 be positioned at axle 5 and one-way slip 2 gap location and can abrasionproof antiscale, slip spider 4 lower ends through screw thread with and cap 6 be connected, and slip spider 4 and also the inner chamber between cap 6 hold back-moving spring 7; Steady nail 8 is arranged on the connection of thread up and down of axle 5 and prevents that screw thread from moving back button, to guarantee that axle 5 is reliably connected with top connection 1, transition joint 9 respectively.Axle 5 lower ends are connected with transition joint 9 through screw thread; In transition joint 9, have that axial passage, more than 3 circumferencial direction that more than three circumferencial direction arranges are arranged and axially extended support bar 11, be arranged in corresponding axial passage and three above sand control screens 20, be set on support bar 11 and protective sleeve 30 and fixing protective sleeve 30 one end and the pressure cap 10 adjacent with counterweight steel 14 of abrasionproof are provided, one end of support bar 11 is with also cap 6 is against contacting, and transition joint 9 lower ends are threaded connection urceolus 13; Counterweight steel 14 is positioned at urceolus 13 inner chambers and there is activity space at two ends, upper end contacts with the other end of support bar 11, lower end is supported by counterweight spring 15, the roller 12 of installing on counterweight steel 14 makes the frictional force between counterweight steel 14 and urceolus 13 very little, and ensures that it effectively reciprocatingly slides in urceolus 13 inner chambers; Counterweight spring 15 is seated on spring base 16, and supports whole gravity of counterweight steel 14, and normal condition lower compression deposit elastic force; Spring base 16 is positioned in lower contact 19, and fixing by active shear pin 18 before going into the well, spring base 16 outsides and urceolus 13 inner chamber annular gaps are by 17 sealings of O shape circle; Active shear pin 18 is fixing with spring base 16 through the shear pin hole 23 of urceolus 13, and occurs to lose the constraint to spring base 16 after electrochemical corrosion in down-hole; Lower contact 19 is through being threadedly connected to urceolus 13 belows hollow out.Back-moving spring 7 is between counterweight spring 15 and the axial direction of one-way slip 2.
Top connection 1, one-way slip 2, slip spider 4, axle 5, wearing bush 3, back-moving spring 7, support bar 11 form grappling supporting mechanism, wherein grappling supporting mechanism is used for supporting sleeve to bear the weight of whole tubing string, and under normal circumstances in shrinking armed state.Under normal circumstances, one-way slip 2 is in contraction state; Fall rapidly when well tubing string is out of control, under the effect of gravity feedback mechanism, under the supported bar 11 of one-way slip 2 promotes along the up expanded outer diameter of the dovetail groove conical surface, friction sleeve pipe 21 inwalls, incision sleeve pipe 21 inwalls fast of the unidirectional external tooth 22 on one-way slip 2; Top tubing string extruding top connection 1 makes the dovetail groove conical surface clamp-on rapidly one-way slip 2, and instrument grappling is rapidly descending to stop top tubing string to continue.Simultaneously back-moving spring 7 is compressed, promotes slip spider 4,2 times horizontal resets of one-way slip are prepared during for instrument unfreezing.On while putting on portion's tubing string unfreezing, weightless feedback mechanism resets, back-moving spring 7 relies on self compressed elastic force extension, thereby it is descending to promote successively support bar 11 cap 6, slip spider 4 and one-way slip 2, one-way slip 2 is descending along the dovetail groove conical surface in top connection 1, one-way slip 2 reduced diameter, lose support with sleeve pipe 21, and instrument restPoses.
Counterweight steel 14, counterweight spring 15, roller 12 form weightless feedback mechanism, and wherein weightless feedback mechanism is for responding the motion state of tubing string, and tubing string is out of control while acquiring a certain degree, utilize loss-in-weight to start grappling supporting mechanism.Under normal circumstances, whole gravity of counterweight steel 14 are supported by counterweight spring 15, counterweight spring 15 compressed and savings size be the elastic force of counterweight steel 14 whole gravity; Fall rapidly when well tubing string is out of control, counterweight steel 14 is done the similar movement of falling object and is produced weightlessness, and gravity reduces; The elastic force of counterweight spring 15 inner savings can not reduce because of weightlessness, but the resistance of Compress Spring (being the gravity of counterweight steel 14) reduces, counterweight spring 15 is upheld because discharging the inner elastic force of saving, then promote counterweight steel 14 up, to start grappling supporting mechanism, supporting sleeve 21, stops top tubing string to continue descending.On when putting on portion's tubing string unfreezing or tubing string and braking completely, counterweight steel 14 weightlessnesses disappear, its whole gravity acts on counterweight spring 15 again, weightless feedback mechanism resets completely.
The lower contact 19 of sand control screens 20 in transition joint 9, urceolus 13, spring base 16, O shape circle 17, active shear pin 18, hollow out forms fluid power auxiliary body, wherein fluid power auxiliary body is used for tubing string in the time that liquid is out of control, utilize fluid power impact principle to start grappling supporting mechanism, and effectively supplementing as weightless feedback mechanism.The object of active shear pin 18 is the functions that temporarily shield fluid power auxiliary body, makes instrument can not start supporting sleeve 21 because fluid power impacts in the process of going into the well.While going into the well, spring base 16 is fixing by active shear pin 18, and through after a period of time, active shear pin 18 is better than urceolus 13 and spring base 16 because of chemism, there is electrochemical corrosion and destroyed, spring base 16 is lost to constraint, and fluid power auxiliary body recovers, standby.Under normal circumstances, the sand control screens 20 in axial passage can be passed liquid, can the upper and lower pressure of equilibrium bomb spring abutment 16, and keep activity space clean of counterweight steel 14, spring base 16 remains static; Fall rapidly when well tubing string is out of control, between urceolus 13 and sleeve pipe 21, liquid flow is obstructed, in the fluid of spring base 16 bottoms, voltage rise is high, in the fluid raising, press promotion spring base 16 up to reduce this pressure, then act on grappling supporting mechanism by weightless feedback mechanism, finally make grappling supporting mechanism start, supporting sleeve 21, stops top tubing string to continue descending.Fluid power auxiliary body effectively supplements as weightless feedback mechanism, makes weightless feedback mechanism sensitiveer in liquid.After upper lifting pipe post or tubing string are braked completely, liquid flow is no longer obstructed, and interior pressure is recovered, and fluid power auxiliary body also resets completely.
As shown in Figure 2, fall rapidly when well tubing string is out of control, if instrument is more than liquid level, counterweight steel 14 produces weightless, counterweight spring 15 promotes counterweight steel 14, support bar 11, slip spider 4 because resistance reduces to extend up, the final up hole enlargement supporting sleeve 21 of one-way slip 2 that promotes, back-moving spring 7 is compressed simultaneously, promotes slip spider 4,2 times horizontal resets of one-way slip are prepared during for instrument unfreezing.When the unfreezing of upper lifting pipe post, counterweight steel 14 is weightless to disappear, counterweight steel 14 is descending, counterweight steel 14 gravity act on counterweight spring 15 again, and back-moving spring 7 relies on self compressed elastic force to uphold, thereby promote successively support bar 11 and cap 6, slip spider 4 and one-way slip 12 are descending, one-way slip 2 is descending along the dovetail groove conical surface in top connection 1, reduced diameter, loses support with sleeve pipe 21, and instrument restPoses.
As shown in Figure 3, fall rapidly when well tubing string is out of control, if instrument is below liquid level, the throttling action in gap between urceolus 13 and sleeve pipe 21, and produce surge in spring base 16 bottoms, it is up to discharge this pressure that this surge promotes spring base 16, then promote counterweight spring 15, counterweight steel 14, support bar 11, slip spider 4 up, the up hole enlargement supporting sleeve 21 of final promotion one-way slip 2, and enough large resistance is provided, prevent that tubing string out of control from continuing descending.Simultaneously back-moving spring 7 is compressed, promotes slip spider 4,2 times horizontal resets of one-way slip are prepared during for instrument unfreezing.Below liquid level, weightless and hydraulic shock effect is simultaneous, and two kinds of Initiated Mechanism of instrument are also coefficient.
The present invention utilizes loss-in-weight to prevent pipe column falling well, and its general principle is: the weight-loss while utilizing object to do the similar movement of falling object, the characteristic properties of Compress Spring are carried out the special supporting mechanism of emergency starting, falls with the continuation that stops object out of control.And weight-loss refers to when the object of certain mass is done the similar movement of falling object downwards with certain acceleration, will reduce the object pressure that supports it, the numerical value reducing is relevant to acceleration.The characteristic properties of Compress Spring refers to given spring, and whether the elastic force of its savings is only relevant with the deflection (stretching or compression) of itself, and weightless irrelevant with itself.Be obstructed once liquid flow in addition, can cause its internal pressure to raise, assist also and can supplement weightlessness by fluid power.
It is also to be noted that; here " on ", just the present invention and the exemplary direction that defines for convenience of description of D score; as Figure 1-3; paper left direction be " on "; paper right direction is D score, and certainly, those skilled in the art are appreciated that on basis of the present invention; also can otherwise define " on ", the direction such as D score, within falling into protection scope of the present invention equally.
Advantage of the present invention is:
1,, when tubing string is normally produced, anti-not grappling of lost tool sleeve pipe only just starts grappling in the time that tubing string falls suddenly well, has effectively protected sleeve pipe;
2, weightless, fluid power double starting, frame for movement is simple, can not lose efficacy for a long time in down-hole;
3, fall to starting when well rapidly tubing string is out of control, support reliably, easily remove grappling.
Certainly above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformation or modification that according to the present invention, the Spirit Essence of main technical schemes does, within all should being encompassed in protection scope of the present invention.
Claims (7)
1. an anti-lost tool, it is characterized in that it comprises: there is the top connection (1) of oil pipe internal thread and the dovetail groove conical surface, the one-way slip (2) that can relatively move along the dovetail groove conical surface, can promote the up slip spider (4) of one-way slip (2), be positioned at the transition joint (9) of top connection (1) below, axle (5) between bridge joint top connection (1) and transition joint (9), the urceolus (13) of counterweight steel (14) is accommodated in upper end connection transition joint (9) and inside, the lower contact (19) that upper end is connected with urceolus (13), and accommodate said elements and with the fixing sleeve pipe (21) of one-way slip (2) selective erase.
2. the anti-lost tool of one according to claim 1, it is characterized in that: it relies on elastic force help the back-moving spring (7) of slip spider (4) and one-way slip (2) reset and be arranged on the connection of thread up and down of axle (5) and prevent that screw thread from moving back the steady nail (8) of buckleing while further comprising the wearing bush (3) that is arranged between axle (5) and one-way slip (2), instrument unfreezing, wherein back-moving spring (7) is enclosed within axle (5) and goes up and be positioned at slip spider (4).
3. the anti-lost tool of one according to claim 2, it is characterized in that: sand control screens (20) and support bar (11) are installed in described transition joint (9), on counterweight steel (14), be provided with for reducing and urceolus (13) friction and can axially movable roller (12), with be set in its end and the counterweight spring (15) of axial elastic force be provided, and in urceolus (13), be provided with the spring base (16) of fixed weight spring (15), for the O shape circle (17) between Packing spring seat (16) and urceolus (13) inner chamber, with for by active shear pin (18) temporary transient fixing between spring base (16) and urceolus (13), wherein spring base (16) is seated in the lower contact (19) of hollow out, against back-moving spring (7) is upper, the other end is resisted against on counterweight steel (14) in one end of support bar (11).
4. the anti-lost tool of one according to claim 3, it is characterized in that: it further comprises the protective jacket (30) being arranged between support bar (11) and transition joint (9), wherein the number of one-way slip (2) and support bar (11) is more than three, and roller (12) is more than two.
5. the anti-lost tool of one according to claim 4, is characterized in that: described top connection (1), one-way slip (2), slip spider (4), axle (5), wearing bush (3), back-moving spring (7), support bar (11) composition grappling supporting mechanism; And described counterweight steel (14), counterweight spring (15), roller (12) form weightless feedback mechanism; The lower contact (19) of enclosing (17), active shear pin (18), hollow out with sand control screens (20), urceolus (13), spring base (16), O shape in described transition joint (9) forms fluid power auxiliary body.
6. one kind has the anti-fall well method of the anti-lost tool as described in claim 3 or 4 or 5, it is characterized in that: under normal circumstances, counterweight spring (15) and one-way slip (2) are in shrinking armed state, and back-moving spring (7) is in expansion state, wherein the elastic force of counterweight spring (15) equals whole gravity of counterweight steel (14), and one-way slip (2) is separated from each other with sleeve pipe (21); Fall rapidly in well situation tubing string is out of control, counterweight steel (14) reduces because of weightlessness gravity, counterweight spring (15) and one-way slip (2) are in expansion state, one-way slip (2) is fixed with sleeve pipe (21) phase mutual friction, counterweight spring (15)) elastic force be greater than the gravity of counterweight steel (14), and promote the up and compression reseting spring (7) of counterweight steel (14).
7. anti-fall well method as claimed in claim 6, it is characterized in that: fall rapidly well and anti-lost tool below liquid level time tubing string is out of control, between urceolus and sleeve pipe there is throttling action in gap, and produce surge in spring base bottom, and it is up to promote spring base, counterweight spring, counterweight steel, support bar, slip spider, until promote the up expanded outer diameter supporting sleeve of one-way slip, back-moving spring is compressed simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410274609.8A CN104033118B (en) | 2014-06-18 | 2014-06-18 | Tool and method for preventing fall in well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410274609.8A CN104033118B (en) | 2014-06-18 | 2014-06-18 | Tool and method for preventing fall in well |
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| Publication Number | Publication Date |
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| CN104033118A true CN104033118A (en) | 2014-09-10 |
| CN104033118B CN104033118B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410274609.8A Active CN104033118B (en) | 2014-06-18 | 2014-06-18 | Tool and method for preventing fall in well |
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| CN (1) | CN104033118B (en) |
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| CN105089531A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Oil field horizontal well oil extraction pipe column breakage, separation and well falling prevention device |
| CN106677731A (en) * | 2016-06-29 | 2017-05-17 | 中石化石油工程技术服务有限公司 | Device and method for preventing wireless while-drilling clinometer from falling into well |
| CN110080697A (en) * | 2019-04-19 | 2019-08-02 | 新疆华油油气工程有限公司 | Tubing string unstability Balance Treatment device |
| US10738542B2 (en) | 2017-10-24 | 2020-08-11 | Baker Hughes, A Ge Company, Llc | Actuating force control for downhole tools |
| CN111946290A (en) * | 2020-10-09 | 2020-11-17 | 宜宾学院 | Coiled tubing prevents falling well device |
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| CN203961862U (en) * | 2014-06-18 | 2014-11-26 | 金湖县支点石油科技有限责任公司 | A kind of anti-lost tool |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089531A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Oil field horizontal well oil extraction pipe column breakage, separation and well falling prevention device |
| CN106677731A (en) * | 2016-06-29 | 2017-05-17 | 中石化石油工程技术服务有限公司 | Device and method for preventing wireless while-drilling clinometer from falling into well |
| CN106677731B (en) * | 2016-06-29 | 2019-12-24 | 中石化石油工程技术服务有限公司 | Anti-well-falling device and method for wireless inclination measuring while drilling instrument |
| US10738542B2 (en) | 2017-10-24 | 2020-08-11 | Baker Hughes, A Ge Company, Llc | Actuating force control for downhole tools |
| GB2581726A (en) * | 2017-10-24 | 2020-08-26 | Baker Hughes Holdings Llc | Actuating force control for downhole tools |
| GB2581726B (en) * | 2017-10-24 | 2022-08-10 | Baker Hughes Holdings Llc | Actuating force control for downhole tools |
| CN110080697A (en) * | 2019-04-19 | 2019-08-02 | 新疆华油油气工程有限公司 | Tubing string unstability Balance Treatment device |
| CN111946290A (en) * | 2020-10-09 | 2020-11-17 | 宜宾学院 | Coiled tubing prevents falling well device |
| CN111946290B (en) * | 2020-10-09 | 2022-07-19 | 宜宾学院 | Coiled tubing prevents falling well device |
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|---|---|
| CN104033118B (en) | 2017-02-15 |
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