57results about How to "Reduce Downhole Accidents" patented technology

A thermoelectric power generation type high-temperature drilling fluid cooling and circulating system comprises a refrigerating unit, a refrigerating unit pump, a first valve, a second valve, a cooling fluid loading box, a cooling fluid delivering pump, a heat exchanger, a steam-turbine generator, an electricity storage box, electric equipment, a condenser, a well, a drilling fluid pond, a first drilling fluid delivering pump and a second drilling fluid delivering pump; the first drilling fluid delivering pump is positioned between the well and the drilling fluid pond, and pumps the high-temperature drilling fluid upwards returning from the well to the drilling fluid pond; and the second drilling fluid delivering pump is positioned between the drilling fluid pond and the heat exchanger, and delivers the high-temperature drilling fluid to the heat exchanger. By the heat exchanger, the high-temperature drilling fluid and the cooling fluid are subjected to heat exchange, the exchanged cooling fluid becomes high-temperature and high-pressure gas which enters the steam-turbine generator to drive the generator to generate power, and the generated electric energy is stored in the electricity storage box and supplies power for the electric equipment. After the high-temperature drilling fluid becomes low-temperature drilling fluid by exchange through the heat exchanger, the low-temperature drilling fluid enters the well through a sixth pipeline.

The invention relates to a pulse impact producing mechanism and a center differential pressure drill comprising the same. The pulse impact producing mechanism comprises a righting element, a driving element, a rotating element and a throttling element which are placed sequentially, the righting element, the driving element and the rotating element are connected sequentially, the throttling element and the rotating element are in clearance fit, overcurrent channels which are used for flowing of a drilling fluid are arranged on the righting element and the throttling element, the driving element drives the rotating element to rotate, and the overcurrent channels on the rotating element and the throttling element move relatively. The center differential pressure drill comprises a reaming bit, the pulse impact producing mechanism, a pressure regulating element, a transmission mechanism and a pilot bit, and the pressure regulating element, the transmission mechanism and the pilot bit are connected sequentially. Compared with the prior art, the cuttings hold-down effect of the pilot bit and the reaming bit is reduced while rotary impact drilling of the pilot bit can be realized, further the purposes of protecting the bits, prolonging the service lives and improving the drilling speed are realized, and the drilling effect is further improved.

The invention discloses a continuous sand-washing process and a continuous sand-washing device formed by, firstly, mounting control valves one by one on the upper port of a sand-washing pipe column and on the upper port of a single sand-washing pipe column. When the control valve is open, a regular sand-washing pipe column reaches down. When the sand-washing pipe column approaches or reaches the sand sediment or oil send at the bottom of a well, if extension is needed, single sand-washing pipe columns provided with control valves are connected one by one to establish sand-washing circulation channel, start a mud pump and carry out sand-washing operation; the control valve in open state allows double-way passage and offers such options as regular positive circulation operation and reverse circulation operation. Meanwhile, the control valve is started or closed manually to decouple from or couple with the single sand-washing pipe column. The invention is not subject to the restriction of sand medium and is particularly suitable for sand-washing operation by nitrogen foam under low-pressure well. The process saves the pressure-releasing time for connecting single sand-washing pipe column every time, realizes continuous sand washing, improves efficiency, prolongs the time of oil well production, and thus reduces cost and increases benefits.

The invention relates to a quick coring drilling system without a marine riser and method based on circulating drilling fluid. The quick coring drilling system comprises a mud circulation system and acoring drilling system body, wherein the coring drilling system body comprises a drill pipe, a spearhead, a driving device, a hydraulic down-hole hammer, a core pipe and a drill bit which are sequentially connected from top to bottom inside the drill pipe; the mud circulation system comprises a return cone, a recovery pump, a mud tank, a mud pump and a conveying pipeline group; the conveying pipeline group comprises a first conveying pipeline, a second conveying pipeline and a third conveying pipeline; and the mud tank, mud pump, the drill pipe, the return cone and the conveying pipeline group are in communication with each other to form a mud circulation channel. The quick coring drilling system does not use the marine riser, the time for lowering a pipe column is reduced, the emergencyrelease speed is accelerated, the connection can be quickly performed through the return cone, time and cost are saved, and the risk of wellhead instability is reduced.

The invention relates to a self-moving type termination point hydraulic support based on a parallel mechanism and application of the termination point hydraulic support. The self-moving type termination point hydraulic support comprises a front hydraulic support body and a rear hydraulic support body, wherein the front hydraulic support body and the rear hydraulic support body are connected through a pushing jack, the front hydraulic support body comprises two parallel front bases, a base connecting rod, a front top beam and front standing columns, one sides of the two front bases are fixedly connected through the base connecting rod, the plurality of front standing columns are symmetrically disposed on the two front bases, and two ends of the front standing columns are respectively hinged to the front top beam and the front bases. The self-moving type termination point hydraulic support has the advantages that the front hydraulic support body adopts the parallel mechanism, the front top beam is allowed to have six freedom degrees and can reach any spatial positions, the front top beam can be well combined with a top plate, top plate completeness is maintained greatly, the support is large in support force and support face, good in support effect and capable of achieving integral self-moving through hydraulic drive, manual carrying is not needed, working strength is lowered greatly, and work efficiency is increased evidently.

The invention discloses a shock absorber for a drilling tool in oil-gas drilling. The shock absorber comprises a mandrel, wherein a spline and a fixed piston are arranged on the mandrel; a spline outer cylinder is arranged on the spline, and the spline outer cylinder and the spline form an axial sliding pair; a plurality of damping channels are axially formed between the spline and the spline outer cylinder; the lower end of the spline outer cylinder is connected with a lower outer cylinder, and the upper end of the spline outer cylinder is sequentially connected with an upper outer cylinder,an upper seal joint and an upper joint; the spline outer cylinder and the upper outer cylinder, the upper seal joint and the lower outer cylinder, the fixed piston respectively form an upper annular cavity and a lower annular cavity at the periphery of the mandrel, and the two cavities are communicated through the damping channels; an oil injection nozzle and a gas injection nozzle are respectively formed on the spline outer cylinder and the upper seal joint in the radial direction; the oil injection nozzle is communicated with the damping channels; the gas injection nozzle is communicated with the upper annular cavity through a gas injection annular channel; and a movable piston is arranged in the upper annular cavity. The shock absorber for the drilling tool in the oil-gas drilling integrates liquid, damping and gas shock absorption so as to avoid the fatigue failure of the drilling tool, and has the characteristics of high shock absorption performance, long service life, low manufacturing cost, simple structure, a few quick-wear parts, convenience of maintenance and the like.

The invention discloses a VFD control system and method for automatic optimization of drilling parameters. The system includes a programmable controller PLC subsystem, a control display screen, a frequency converter VFD and a motor. The programmable controller PLC subsystem collects drilling data in real time and calculates and analyzes all kinds of data which serves as a basis of the optimized operation; the control display screen can have access to a webpage of the programmable controller PLC subsystem, displays various parameters and can automatically conduct the optimized operation; the frequency converter VFD receives a control command of the programmable controller subsystem and controls the rotating speed of the motor; the method is based on mechanical specific energy calculation, and the automatic optimization and manual optimization are combined. According to the VFD control system and method for the automatic optimization of the drilling parameters, the drilling efficiency is improved, the wearing capacity of the drilling head is reduced, downhole working conditions can be predicted, drilling accidents are prevented, and the drilling cost is reduced.

The invention discloses a drilling machine angle accurate positioning detection and control system. The drilling machine angle accurate positioning detection and control system comprises a driving system, a detection device and an actuator corresponds to the driving system, wherein the driving system comprises a top driving system or a rotary disk driving system. The drilling machine angle accurate positioning detection and control system has the advantages that the adopted angle detection device can automatically calculate the rotating angle of a rotating shaft of a motor, calculation is accurate, the accuracy is high, the anti-seismic property is good, machining is easy, and cost is low; since a dynamic tool face controller is used for achieving dynamic control over a downhole orientation power drilling tool face, when the drilling tool face drifts, the dynamic tool face controller can be operated in real time to adjust the drilling tool face, and the situation that equipment stops drilling and a drilling tool is lifted up is avoided; as a result, loss of the equipment is reduced, manpower and material resources are saved substantially, and downhole accidents are greatly reduced at the same time.

The invention relates to a drill head flexible pressurizing damping device, belonging to the circle drill well device of water power or slurry. It at least comprises one hydraulic pressurizing device connecting to the drill post and one power flexible transformer connecting the drill head. Wherein, the hydraulic pressuring device comprises a hydraulic cylinder, a hollow piston, a hollow central axle, and an axle sleeve, while the upper end of hydraulic cylinder comprises a connection element connecting the drill post; the power flexible transformer comprises a hydraulic cylinder, a hollow piston, a hollow key axle, a key sleeve, and an axle sleeve. The invention can be mounted between drill post and the drill head to transmit the axial power generated by the rotational torque on the rotational disc of drill post and the hydraulic pressurizing device to the drill head without expending water power and adsorb the vibration at most; when in high drill pressure and high mechanical drill speed, it has the functions of inclined resistance and stabilization. It can improve the mechanical drill speed around 40%, and prolong the service life of drill head, drill device and the ground device.

The invention provides a strong-plugging hydrophobic high-performance water-based drilling fluid. The strong-plugging hydrophobic high-performance water-based drilling fluid comprises bentonite slurry, sodium hydroxide, a polymer coating inhibitor, a filtrate reducer, an anti-collapse agent, a lubricant, a plugging agent, an activity regulator and a tackifying and shear strength improving agent. According to the strong-plugging hydrophobic high-performance water-based drilling fluid of the invention, the polymer coating inhibitor, the filtrate reducer, the anti-sloughing agent, the lubricant,the blocking agent and the tackifying and shear strength improving agent are used as core treating agents, so that the well wall stability, the inhibition capability, the lithology carrying capabilityand the lubricating anti-sticking performance of the obtained water-based drilling fluid completely meet the requirements of a tight gas exploratory well and a development well in a Linxing-Shenfu block; the plugging of micro-nano hole seams is realized; the large-amplitude hydration expansion of shale is avoided; a good lubricating effect is achieved; the underground pressure supporting condition is effectively reduced; the purposes of improving the mechanical drilling speed, reducing the underground accident rate and saving the cost are achieved; the environment-friendly requirement can bemet; the product is a non-toxic pollution-free product; the cost of the product is low; and the economic requirement is met.

The invention discLoses a downward bedding Layer driLLing hydrauLic sLitting process method, and beLongs to the fieLd of coaL mine gas drainage. The method incLudes the steps of driLLing down the bedding Layer of a soft coaL Layer, using a system pressure wind and a spiraL driLL pipe for construction, stopping driLLing, cLosing the pressure wind, introducing the medium and high pressure water to perform the sLitting, and repeating after compLetion; for the downward bedding driLLing of a medium hard coaL Layer, using Low pressure water and the spiraL driLL pipe for construction, stopping driLLing, switching to the high pressure water for the sLitting operation, and repeating hydrauLic driLLing and sLitting work; adopting a forward driLLing and sLitting method in the soft and medium hard coaL Layer to form a Large area coaL body around the bedding driLLing for pressure reLief and permeabiLity enhancement. The method is suitabLe for pressure reLief and permeabiLity enhancement of the hydrauLic sLitting of the downward bedding driLLing of the high gas outburst coaL Layer in a coaL mine underground coaL road strip and a backstoping area, increases the exposed area of a coaL body, the effective infLuence range of the driLLing and the gas drainage rate, and reduces the number of hoLes driLLed. The method has the advantages of simpLe method, convenient operation, remarkabLe effect andwide popuLarization and appLication vaLue.

The invention discloses an oil shale composite heating in-situ exploiting system and method, and belongs to the field of oil shale in-situ exploiting. The exploiting system comprises an in-well heating system, a ground gas injection system, a well pattern system and a high-pressure breakdown system; and the exploiting method exploits based on the oil shale composite heating in-situ exploiting system. According to the underground fixed heating-injection-production differentiation design, the problems of sealing failure, obvious corrosion and the like caused by too large pressure of a heating injection-production integrated structure are effectively solved, and heat loss along the way is effectively reduced through underground normal-temperature gas injection; a thermal wall effect is formed in the heating process of a heating well, and heating is stable and controllable; a breakdown electrode discharges in the high-pressure atmosphere at the bottom of the well to generate air gap breakdown, the permeability of an oil shale target layer is further improved, a heater is fixed in the well and subjected to underground gas injection combined construction, heat heats the stratum in a heat conduction and heat convection composite heating mode, the heat transfer effect is further improved, and the energy consumption-output ratio is remarkably reduced; and the in-situ exploiting period and the exploiting cost are further close to those of commercial exploiting.

The invention relates to the technical field of continuous circulation drilling wells and particularly relates to a continuous circulation drilling well system. A pressure gauge is arranged on a pipe line at the upper end of a slush pump, the slush pump is connected with a vertical pipe valve through a pipe line, the vertical pipe valve is connected with a faucet through a pipe line, the faucet, a drill pipe, a continuous circulation short section and a drill pipe are connected sequentially, a side of the continuous circulation short section is connected with a quick coupling, the quick coupling is provided with a pressure gauge, the quick coupling is connected with a hose, the hose is connected with a branch valve through a pipe line, a pressure relief valve and a pressure gauge are arranged on a pipe line between the hose and the branch valve, and the branch valve is connected with slush pump trough a pipe line. According to the system, the pump is not required to be stopped during a trip and during connection of the drilling well, the continuous circulation of the drilling fluid is guaranteed, underground pressure fluctuation caused by starting and stopping of the pump is avoided, and underground complex situations and underground accidents caused by the fact that underground pressure fluctuation is too large are avoided, and the disadvantages that the pump is required to be stopped, and the circulation of drilling fluid is interrupted during a trip process and a connection process of an existing drill are overcome.

The invention relates to a strong-inhibition bipotassium ionic polymeric drilling fluid. The strong-inhibition bipotassium amine-based ionic polymeric drilling fluid comprises the following componentsin percent by mass: 2-5% of bentonite, 0.2-0.5% of caustic soda, 0.2-0.3% of soda ash, 0.2-0.5% of potassium polyacrylamide, 5-10% of potassium chloride, 0.2-1% of a zwitterionic polymeric coating agent, 0.5-2% of a shale inhibitor amide polymer, 0.5-1% of a fluid loss additive, 0.2-0.5% of a tackifier, 0.1-0.3% of a viscosity reducer and the balance of water, wherein the weighting density rangeof a weighting agent is 1.10-2.40g/cm<3>. The strong-inhibition bipotassium amine-based ionic polymeric drilling fluid has a very strong function of inhibiting the water-absorbing swelling and dispersion of a clay mineral, has a very good rheological property and proper fluid loss, and can significantly increase the drilling speed of mud shale and stabilize the borehole wall of the mud shale so asto reduce occurrence of downhole accidents.

The invention discloses a well wall stability simulation method and device based on joint surface roughness, and the method comprises the steps: carrying out the three-dimensional contour scanning of a joint surface, obtaining the parameters of the joint surface, and calculating the roughness of the joint surface; the joint surface is obtained by cutting the rock sample according to a preset fluctuation angle; calculating rock mechanical parameters of the rock sample according to the normal stress and the tangential stress of the rock sample obtained by the shear test; calculating rock physical property parameters of the rock sample according to the axial stress, the axial strain and the radial strain of the rock sample obtained by the rock mechanics triaxial experiment; according to the roughness of the joint surface, the rock mechanical parameters, the rock physical property parameters and fluid parameters obtained through a fluid experiment, a borehole wall stability model is established; cutting the rock sample for multiple times by changing the number of fluctuating angles and/or joint surfaces to obtain a plurality of well wall roughness; and inputting the plurality of well wall roughness into a well wall stability model to obtain a plurality of well wall rock displacements, and judging whether the well wall stability model is stable or not, so that the accuracy of well wall stability judgment can be improved.

The invention relates to a multi-branch borehole ultra-short radius windowing sidetrack drilling orientation tool and a using method, the windowing sidetrack drilling orientation tool comprises an oblique fixator, when an oblique device back-off rod and an oblique device centralizing ring in the oblique fixator are lifted out of a well, a guide slope of a guide slope body can be stacked with a recoverable positioner, and the recoverable positioner can be used for positioning the inclined slope of the guide slope body. The recoverable positioner is mainly composed of an upper positioning body, a centralizing body and a lower positioning body, the upper positioning body and the lower positioning body are respectively provided with a guide inclined face, the angle of the guide inclined face on the lower portion of the lower positioning body is the same as that of the guide inclined face of the guide inclined body in the inclined fixator, and a fishing thread is arranged in the upper positioning body. And the upper positioning body is sequentially connected with the positioner reversing rod and the positioner upper joint. And the guide inclined surface of the lower positioning body in the recoverable positioning device and the guide inclined body of the inclined fixer at the bottom of the windowing sidetrack drilling window can be stacked in a matched manner. According to the method, multi-window windowing can be achieved in the main borehole, the operation cost is reduced, and the remarkable development effect of reducing cost and improving efficiency can be achieved.

The invention discloses a hydraulic support balancing mechanism testing device and method. A hydraulic support comprises a top beam, a caving shield, a base, a stand column, a front connecting rod, a rear connecting rod and a balancing jack. The front connecting rod on one side of the hydraulic support is detached first, and the hinge point of the upper end of the rear connecting rod on the same side and the caving shield is assembled at the hinge point of the upper end of the existing front connecting rod and the caving shield after being detached so that the hinge points can be fixed to each other; then, the stand column is lifted first so that the top beam can be lifted upwards, a rod cavity of the balance jack is pulled out by at least 30 mm till a safety valve is unloaded, then the stand column is lowered so that the head of the top beam can be lowered, and a piston cavity of the balance jack is pressed by at least 30 mm till the safety valve is unloaded; a cycle is completed after the stand column rises and falls one time, and at least 4000 cycles are completed. The telescopic amount of the balance jack is controlled through time, and the experiment shows that the average time for extending by 30 mm is set as the liquid supply time. The strength of a balance mechanism can be well verified, and downhole accidents are reduced.

The invention provides a double-aggregate composite polymer, and relates to the technical field of coal mine safety materials, wherein the double-aggregate composite polymer includes the following rawmaterials by mass: 20-100 parts of polyether polyol, 20-100 parts of polymerized MDI, 5-10 parts of a dispersant, 5-10 parts of a catalyst, 5-10 parts of a chain extender, 3-10 parts of a flame retardant, 7-40 parts of a coarse aggregate, and 7-40 parts of a fine aggregate. The double-aggregate composite polymer is suitable for coal mine coal seam filling and reinforcing and leaked air blocking;the composite polymer has low manufacturing cost, and the probability of accidents in underground coal mine after the composite polymer is grouted for use can be effectively reduced.