Control system for emergency lowering of traveling block of drilling machine

Abstract

The invention relates to the technical field of drilling machine winch equipment, in particular to a control system for emergency lowering of a drilling machine traveling block, which comprises a right-way working clamp, a left-way working clamp, a safety clamp, an oil source, an oil tank and a manual oil supply pump module, the right-way working clamp is connected with the oil source and the oil tank through the right-way working clamp oil way; the left working clamp is connected with an oil source and an oil tank through a left working clamp oil path; the safety tongs are connected with an oil source and an oil tank through a safety tongs oil way and a manual pump oil way, and the safety tongs can be selectively connected with the safety tongs oil way and cut off the manual pump oil way or cut off the safety tongs oil way and connected with the manual pump oil way. The manual oil supply pump module is arranged on the manual pump oil way, so that an oil source supplies oil to the safety tongs through the manual oil supply pump module; under the condition of emergency braking of the traveling block, oil pressure can be provided for the safety tongs through the manual oil supply pump module, and emergency lowering of the traveling block is achieved by controlling the braking force of the safety tongs.

Description

Technical Field

[0001] The invention relates to the technical field of drilling rig winch equipment, and in particular to a control system for emergency lowering of a drilling rig traveling carriage. Background Art

[0002] At present, hydraulic disc brakes have been widely used in drilling rig winch equipment. The hydraulic disc brakes are used to control the winch working brake, parking brake, emergency brake and other working conditions. During the drilling construction process, there are occasional emergencies (such as power outages at the well site, etc.). After the disc brakes are used for emergency braking, the traveling block is still suspended in the air. In the related technology, it is very unsafe to brake only by hydraulic disc brakes, and the traveling block needs to be lowered. In some cases, due to unexpected power outages at the well site, the power source of the hydraulic disc brake system cannot provide high-pressure oil for the hydraulic disc brake. At present, it is urgent to adopt emergency methods to implement emergency lowering of the traveling block. Summary of the invention

[0003] The purpose of the present invention is to provide a control system and a control method for emergency lowering of a traveling carriage of a drilling rig, so as to solve the technical problems existing in the related art.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] Firstly, a control system for emergency lowering of a traveling carriage of a drilling rig is provided, comprising a right working clamp, a left working clamp, a safety clamp, an oil source, an oil tank and a manual oil supply pump module;

[0006] The right working tongs are connected to the oil source and the oil tank through the right working tongs oil circuit;

[0007] The left working tongs are connected to the oil source and the oil tank through the left working tongs oil circuit;

[0008] The safety gear is connected to the oil source and the oil tank through the safety gear oil circuit and the manual pump oil circuit. The safety gear can be selectively connected to the safety gear oil circuit and cut off the manual pump oil circuit, or cut off the safety gear oil circuit and connected to the manual pump oil circuit.

[0009] The manual oil supply pump module is arranged on the manual pump oil circuit so that the oil source supplies oil to the safety clamp through the manual oil supply pump module.

[0010] Further, it also includes a first three-way valve;

[0011] The first interface of the first three-way valve is connected to the safety clamp, the second interface of the first three-way valve is connected to the safety clamp oil circuit, and the third interface of the first three-way valve is connected to the manual pump oil circuit.

[0012] Furthermore, it also includes a left working clamp accumulator, a right working clamp accumulator and a safety clamp accumulator;

[0013] Among them, the left working clamp accumulator is connected to the left working clamp oil circuit to supply oil to the left working clamp oil circuit; the right working clamp accumulator is connected to the right working clamp oil circuit to supply oil to the right working clamp oil circuit; the safety clamp accumulator is connected to the safety clamp oil circuit to supply oil to the safety clamp oil circuit.

[0014] Furthermore, it also includes an oil replenishment circuit, and the oil replenishment circuit can supply oil to the left working clamp accumulator, the right working clamp accumulator and the safety clamp accumulator through the manual oil supply pump module;

[0015] The manual oil supply pump module can be selectively connected to the safety gear oil circuit and cut off from the oil supply oil circuit, or cut off from the safety gear oil circuit and connected to the oil supply oil circuit.

[0016] Furthermore, it also includes a first three-way valve and a second three-way valve;

[0017] The first interface of the first three-way valve is connected to the safety clamp, the second interface of the first three-way valve is connected to the safety clamp oil circuit, and the third interface of the first three-way valve is connected to the manual pump oil circuit;

[0018] The first interface of the second three-way valve is connected to the outlet of the manual oil supply pump module through the manual pump oil circuit, the second interface of the second three-way valve is respectively connected to the left working clamp accumulator, the right working clamp accumulator and the safety clamp accumulator through the oil replenishment oil circuit, and the third interface of the second three-way valve is connected to the third interface of the first three-way valve through the manual pump oil circuit.

[0019] Furthermore, the manual oil supply pump module includes a handle, a pump body, a first oil discharge circuit and a stop valve;

[0020] The oil inlet of the pump body is connected to the oil source, the oil outlet of the pump body is connected to the manual pump oil circuit, the oil circuit between the oil outlet of the pump body and the manual pump oil circuit is connected to the oil tank through the first oil discharge circuit, and the shut-off valve is arranged on the first oil discharge circuit.

[0021] Furthermore, the manual oil supply pump module also includes a second oil discharge circuit and a second overflow valve. The oil circuit between the first oil discharge circuit and the oil outlet of the pump body is connected to the oil tank through the second oil discharge circuit. The second overflow valve is arranged on the second oil discharge circuit.

[0022] Furthermore, the manual oil supply pump module further includes a sixth one-way valve, a seventh one-way valve and an eighth one-way valve;

[0023] The sixth one-way valve is arranged on the oil circuit between the oil source and the oil inlet of the pump body, the seventh one-way valve is arranged on the oil circuit between the oil outlet of the pump body and the second oil drain circuit, and the eighth one-way valve is arranged on the oil circuit between the first oil drain circuit and the second oil drain circuit.

[0024] Further, a safety clamp control module is provided on the safety clamp oil circuit, and the safety clamp oil circuit includes oil circuit L8, oil circuit L9 and oil circuit L11, the oil circuit L8 is connected to the P port of the safety clamp control module, the B port of the safety clamp control module is connected to the safety clamp through the oil circuit L9 and the oil circuit L11 in sequence, and the T port of the safety clamp control module is connected to the oil tank;

[0025] The safety clamp control module can selectively control the B port of the safety clamp control module to be connected with the P port of the safety clamp control module and the T port of the safety clamp control module to be cut off, or to be cut off with the P port of the safety clamp control module and connected with the T port of the safety clamp control module;

[0026] The safety clamp accumulator includes a first accumulator and a second accumulator connected in parallel, and the safety clamp accumulator is connected to the oil circuit L8.

[0027] Further, the right working clamp oil circuit includes oil circuit L7, oil circuit L16, oil circuit L17, oil circuit L18 and oil circuit L19, and a right working clamp control module is also provided on the right working clamp oil circuit, the oil circuit L7 and the oil circuit L16 are connected to the SP1 port of the right working clamp control module, and the T port of the right working clamp control module is connected to the oil tank;

[0028] A first hydraulically controlled reversing valve is provided on the right working clamp oil circuit, the oil circuit L17 is connected to the first hydraulically controlled reversing valve and the oil circuit L16 respectively, the BR1 port of the right working clamp control module is connected to the first hydraulically controlled reversing valve through the oil circuit L18, and the first hydraulically controlled reversing valve can connect or cut off the oil circuit L18 and the oil circuit L19;

[0029] The control system for emergency lowering of the drilling rig traveling carriage also includes a working clamp control module and an oil circuit L10, wherein the P port of the working clamp control module is connected to the oil circuit L8 via the oil circuit L13, the A port of the working clamp control module is connected to the G1 port of the right working clamp control module, the working clamp control module can control the BR1 port of the right working clamp control module to be connected to the SP1 port of the right working clamp control module or to the T port of the right working clamp control module, and the oil circuit L9 is connected to the X2 port of the first hydraulically controlled reversing valve via the oil circuit L10;

[0030] The right working clamp accumulator includes a third accumulator, and the safety clamp accumulator is connected to the oil circuit L16.

[0031] Further, the left working clamp oil circuit includes L6, oil circuit L20, oil circuit L21, oil circuit L22 and oil circuit L23, and a left working clamp control module is also provided on the left working clamp oil circuit, the oil circuit L6 and the oil circuit L120 are connected to the SP2 port of the left working clamp control module, and the T port of the left working clamp control module is connected to the oil tank;

[0032] A second hydraulically controlled reversing valve is provided on the left working clamp oil circuit, the oil circuit L21 is connected to the second hydraulically controlled reversing valve and the oil circuit L20 respectively, the BR2 port of the left working clamp control module is connected to the second hydraulically controlled reversing valve through the oil circuit L22, and the second hydraulically controlled reversing valve can connect or cut off the oil circuit L22 and the oil circuit L23;

[0033] The A port of the working clamp control module is connected to the G2 port of the left working clamp control module, and the working clamp control module can control the BR2 port of the left working clamp control module to be connected to the SP2 port of the left working clamp control module or to the T port of the left working clamp control module, and the oil circuit L9 is connected to the X2 port of the second hydraulically controlled reversing valve through the oil circuit L10;

[0034] The left working clamp accumulator includes a fourth accumulator, and the safety clamp accumulator is connected to the oil circuit L20.

[0035] The present invention has the following beneficial effects: when the well site loses power or other faults occur, the power source of the hydraulic disc brake system cannot provide high-pressure oil for the hydraulic disc brake, that is, when the oil source cannot provide oil pressure to the safety clamp, the right working clamp and the left working clamp, the safety clamp is in a braking state, and the right working clamp and the left working clamp are both in a brake-released state. The safety pump is cut off from the safety clamp oil circuit and connected to the manual pump oil circuit, and oil pressure can be provided to the safety clamp through the manual oil supply pump module, so that the safety clamp can be released, and the braking force of the safety clamp can be controlled by controlling the oil pressure provided by the manual pump module, so as to realize the emergency lowering of the traveling carriage, and the emergency lowering time is short, the response is fast, the overall time of the emergency lowering of the traveling carriage is shortened, the time that the traveling carriage stays in the air for a long time is shortened, and the risk is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 This is the second hydraulic principle diagram of the drilling rig traveling block emergency lowering control system of this embodiment, showing that the manual oil supply pump module supplies oil to the safety clamp;

[0038] Figure 2 The first hydraulic principle diagram of the drilling rig traveling block emergency lowering control system of this embodiment shows the manual oil supply pump module supplying oil to the safety clamp and the second three-way valve;

[0039] Figure 3 The third hydraulic principle diagram of the drilling rig traveling carriage emergency lowering control system of this embodiment shows that the first accumulator, the second accumulator, the third accumulator and the fourth accumulator supply oil to the safety clamp, the right working clamp and the left working clamp respectively;

[0040] Figure 4 The fourth hydraulic principle diagram of the drilling rig traveling carriage emergency lowering control system of this embodiment shows that the manual oil supply pump module supplies oil to the first accumulator, the second accumulator, the third accumulator and the fourth accumulator respectively;

[0041] Figure 5 This is the hydraulic principle diagram of the manual oil supply pump module of this embodiment.

[0042] 21.1-first one-way valve, 21.2-second one-way valve, 21.3-third one-way valve, 21.4-fourth one-way valve, 21.5-fifth one-way valve, 22-first overflow valve, 23-high pressure filter, 24.1-first ball valve, 24.2-second ball valve, 24.3-third ball valve, 25.1-first pressure gauge, 25.2-second pressure gauge, 25.3-third pressure gauge, 26.1-first accumulator, 26.2-second accumulator, 2 6.3-third accumulator, 26.4-fourth accumulator, 27-safety clamp control module, 28-working clamp control module, 29-right working clamp control module, 210-left working clamp control module, 211-first hydraulic reversing valve, 212-second hydraulic control reversing valve, 213-fourth pressure gauge, 214-first three-way valve, 215-second three-way valve, 3-manual oil supply pump module, 41-safety clamp, 42-right working clamp, 43-left working clamp;

[0043] L1 - oil circuit connecting the first non-return valve 21.1 and the inlet of the high-pressure filter 23;

[0044] L2 - oil circuit connecting the second non-return valve 21.2 and the inlet of the high-pressure filter 23;

[0045] L3-Port 2 of the second three-way valve is connected to the inlet of the high-pressure filter 23;

[0046] L4-The T port of the safety clamp control module 27 is connected to the T port of the system oil return circuit;

[0047] L5 - oil circuit connecting the outlet of the high pressure filter 23 and the third one-way valve 21.3;

[0048] L6-the third one-way valve 21.3 and the fourth one-way valve 21.4 are connected to the oil circuit;

[0049] L7-the third one-way valve 21.3 and the fifth one-way valve 21.5 are connected to the oil circuit;

[0050] L8 - the third non-return valve 21.3 and the P port connection circuit of the safety clamp control module 27;

[0051] L9 - a connection loop between port B of the safety clamp control module 27 and port 2 of the first three-way valve 214;

[0052] L10 - control oil circuit of the first hydraulically controlled reversing valve 211 and the second hydraulically controlled reversing valve 212 (the X2 port of the first hydraulically controlled reversing valve 211 and the X3 port of the second hydraulically controlled reversing valve 212 are connected to the B port of the safety clamp control module 27);

[0053] L11-Port 1 of the first three-way valve 214 is connected to the oil circuit of the safety clamp 41;

[0054] L12-the 3rd port of the first three-way valve 214 and the 3rd port of the second three-way valve 215 are connected to the oil circuit;

[0055] L13-the P port of the safety clamp control module 27 and the P port of the working clamp control module 28 are connected to the oil circuit;

[0056] L14-the G1 port of the right working clamp control module 29 and the G2 port of the left working clamp control module 210 are connected to the A port of the working clamp control module 28 through an oil circuit;

[0057] L15 - the first ball valve 24.1, the second ball valve 24.2, the third ball valve 24.3 and the oil circuit L4 are connected to the oil circuit;

[0058] L16 - oil circuit connecting the fifth non-return valve 21.5 and the SP1 port of the right working clamp control module 29;

[0059] L17-the fifth one-way valve 21.5 is connected to the B port of the first hydraulically controlled reversing valve 211 through an oil circuit;

[0060] L18 - the BR1 port of the right working clamp control module 29 is connected to the A port of the first hydraulically controlled reversing valve 211 through an oil circuit;

[0061] L19-the P port of the first hydraulically controlled reversing valve 211 is connected to the oil circuit of the right working clamp 42;

[0062] L20 - oil circuit connecting the fourth non-return valve 21.4 and the SP2 port of the left working clamp control module 210;

[0063] L21 - the fourth one-way valve 21.4 is connected to the B port of the second hydraulically controlled reversing valve 212 through an oil circuit;

[0064] L22 - the BR2 port of the left working clamp control module 210 is connected to the A port of the second hydraulically controlled reversing valve 212 through an oil circuit;

[0065] L23-The P port of the second hydraulically controlled reversing valve 212 is connected to the left working clamp 43 through an oil circuit. DETAILED DESCRIPTION

[0066] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0067] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0068] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] The present invention provides a control system for emergency lowering of a drilling rig traveling carriage, such as Figure 1As shown, it includes a left working clamp 43, a right working clamp 42 and a safety clamp 41. During the drilling construction process, if there is a power outage at the well site, the main motor of the drawworks loses power, the disc brake control system is in an emergency braking state, and the traveling block is suspended in the air, then it is necessary to slowly lower the traveling block, which requires that the left working clamp 43, the right working clamp 42 and the safety clamp 41 are all in a released brake state.

[0071] In this embodiment, when there is oil pressure in the left working clamp 43 and the right working clamp 42, they are in a braking state, i.e., a braking state; otherwise, they are in a non-braking state, i.e., a released state; when there is oil pressure in the safety clamp 41, it is in a non-braking state, i.e., a released state; otherwise, it is in a braking state, i.e., a braking state.

[0072] The control system for emergency lowering of the drilling rig traveling carriage also includes an oil source, an oil tank and a manual oil supply pump module 3. In some embodiments, the oil source can provide oil pressure through an oil pump, or the oil source can provide oil pressure through the manual oil supply pump module 3, and the oil tank can drain oil from the oil supply circuit to achieve a pressure reduction effect.

[0073] like Figure 1 As shown, the safety clamp 41 is connected to the oil tank T interface and the oil source P1 interface through the safety clamp oil circuit, the left working clamp 43 is connected to the oil tank T interface and the oil source P1 through the left working clamp oil circuit, and the right working clamp 42 is connected to the oil tank T interface and the oil source P1 through the right working clamp oil circuit.

[0074] Specifically, in this embodiment, the safety gear oil circuit includes the oil circuit L11 connected to the oil tank T interface, the oil circuit L9, the safety gear control module 27 and the oil circuit L4.

[0075] The safety clamp oil circuit also includes oil circuit L11, oil circuit L9, safety clamp control module 27, oil circuit L8, oil circuit L7, oil circuit L6, oil circuit L5 and oil circuit L1 connected to the oil source P1 interface.

[0076] Furthermore, the manual oil supply pump module 3 is connected to the oil circuit L11 through the oil circuit L12, and a first three-way valve 214 is installed at the connection between the oil circuit L11, the oil circuit L9 and the oil circuit L12. The first interface of the first three-way valve 214 is connected to the oil circuit L11, the second interface is connected to the oil circuit L9, and the third interface is connected to the oil circuit L12. The first accumulator 26.1 and the second accumulator 26.2 are arranged on the oil circuit L8, and the first accumulator 26.1 and the second accumulator 26.2 outlets are connected to the first ball valve 24.1, and the first ball valve 24.1 is connected to the oil circuit L4 through the oil circuit L15.

[0077] Among them, the first three-way valve 214 can connect the first interface of the first three-way valve 214 and the second interface of the first three-way valve 214, and cut off the third interface of the first three-way valve 214, so that the safety clamp 41 is connected to the safety clamp oil circuit and the manual oil supply pump module 3 is cut off; or, the first three-way valve can connect the first interface of the first three-way valve 214 and the third interface of the first three-way valve 214, and cut off the second interface of the first three-way valve 214, so that the safety clamp 41 is connected to the manual oil supply pump module 3 and the safety clamp oil circuit is cut off.

[0078] like Figure 3 As shown, under normal working conditions, the first interface and the second interface of the first three-way valve 214 are connected, that is, the oil circuit L11 is connected to the oil circuit L9, the first ball valve 24.1 is in a closed state, and the P1 interface of the oil source supplies oil, and the safety clamp 41 is supplied with oil through the oil circuit L1, oil circuit L5, oil circuit L6, oil circuit L7, oil circuit L8, the safety clamp control module 27, oil circuit L9 and oil circuit L11, so that the safety clamp 41 is in a non-braking state, that is, a released brake state.

[0079] Since the oil pressure in the oil circuit L8 is relatively high at this time, the first accumulator 26.1 and the second accumulator 26.2 are charged until the oil pressure is consistent with that in the oil circuit L8, and the first ball valve 24.1 is opened. The first accumulator 26.1, the second accumulator 26.2 and the oil circuit L8 are connected to the oil circuit L4 through the oil circuit L15, reaching a pressure relief state.

[0080] The oil circuit L11 and the oil circuit L9 are connected to the oil circuit L4 through the safety clamp control module 27, so the corresponding oil circuit L11 and the oil circuit L9 also reach the pressure relief state at this time, so there is no oil pressure in the safety clamp 41 at this time, and the braking state, that is, the braking state, can be reached.

[0081] When the safety clamp 41 is in the braking state, there is no oil pressure in the oil circuit L11. In order to lower the traveling carriage, the first interface and the third interface of the first three-way valve 214 are connected, that is, the oil circuit L12 is connected to the oil circuit L11, and the manual oil supply pump module 3 is operated to supply oil to the oil circuit L12. The oil pressure supplies oil to the safety clamp 41 through the first three-way valve 214 and the oil circuit L11, so that the safety clamp 41 slowly forms a non-braking state, that is, a brake-released state. By controlling the amount of oil supplied by the manual oil supply pump module 3, the braking force of the safety clamp 41 can be controlled. Under the condition of the traveling carriage's own weight, the traveling carriage can be slowly lowered.

[0082] That is, by operating the manual oil supply pump module 3 to supply pressure to the safety clamp oil circuit, the safety clamp is slowly released and the traveling block is slowly lowered.

[0083] In this embodiment, the left working clamp oil circuit includes oil circuit L23, oil circuit L21, oil circuit L20, oil circuit L15 and oil circuit L4 connected to the T interface of the oil tank; or oil circuit L23, oil circuit L22 and the left working clamp control module 210.

[0084] The left working pliers oil circuit also includes oil circuit L23, oil circuit L21, oil circuit L20, oil circuit L6, oil circuit L5 and oil circuit L1 connected to the P1 interface of the oil source.

[0085] Furthermore, a fourth accumulator 26.4 is provided on the oil circuit L20, an outlet of the fourth accumulator 26.4 is connected to a third ball valve 24.3, the third ball valve 24.3 is connected to the oil circuit L4 through the oil circuit L15, and a second hydraulically controlled reversing valve 212 is installed on the oil circuit L22.

[0086] In this embodiment, the right working clamp oil circuit includes oil circuit L19, oil circuit L17, oil circuit L16, oil circuit L15 and oil circuit L4 connected to the T interface of the oil tank; or oil circuit L19, oil circuit L18 and the right working clamp control module 29.

[0087] The right working pliers oil circuit also includes oil circuit L19, oil circuit L17, oil circuit L16, oil circuit L7, oil circuit L6, oil circuit L5 and oil circuit L1 connected to the P1 interface of the oil source.

[0088] Furthermore, a third accumulator 26.3 is provided on the oil circuit L16, an outlet of the third accumulator 26.3 is connected to a second ball valve 24.2, the second ball valve 24.2 is connected to the oil circuit L4 through the oil circuit L15, and a first hydraulically controlled reversing valve 211 is installed on the oil circuit L18.

[0089] Under normal working conditions, there is no oil pressure in the oil circuit L23 and the oil circuit L19, the second ball valve 24.2 and the third ball valve 24.3 are in a closed state, at which time the left and right working calipers are in a non-braking state, i.e., a released brake state, and the oil source charges the third accumulator 26.3 and the fourth accumulator 26.4.

[0090] When the power is suddenly cut off, the oil source loses power, and there is oil pressure in the third accumulator 26.3 and the fourth accumulator 26.4. The second ball valve 24.2 and the third ball valve 24.3 are in a closed state. The third accumulator 26.3 and the fourth accumulator 26.4 provide oil pressure to the left and right working calipers, making them in a braking state, i.e., a brake state.

[0091] In order to relieve the pressure of the third accumulator 26.3 and the fourth accumulator 26.4, the ball valve 24.2 and the ball valve 24.3 are opened. At this time, the third accumulator 26.3 and the fourth accumulator 26.4 are connected to the oil circuit L4 through the oil circuit L15 to achieve the pressure relief state.

[0092] In order to better control the left and right working clamps, the right working clamp control module 29 is connected to the first hydraulically controlled reversing valve 211 through the oil circuit L18, the oil circuit L18 is connected to the BR1 interface of the right working clamp control module, and the oil circuit L16 is connected to the SP1 interface of the right working clamp control module 29; the left working clamp control module 210 is connected to the second hydraulically controlled reversing valve 212 through the oil circuit L22, the oil circuit L22 is connected to the BR2 interface of the left working clamp control module 210, and the oil circuit L20 is connected to the SP2 interface of the left working clamp control module 210.

[0093] When the left and right working calipers need to be in a braking state, that is, the second ball valve 24.2 and the third ball valve 24.3 are in a closed state, and the oil pressure of the third accumulator 26.3 enters the first hydraulic reversing valve 211 through the oil circuit L16 and the oil circuit L17, and then enters the oil circuit L19, and the right working caliper 42 is in a braking state; the corresponding oil pressure of the fourth accumulator 26.4 enters the second hydraulic reversing valve 212 through the oil circuit L20 and the oil circuit L21, and then enters the oil circuit L23, and the left working caliper 43 is in a braking state.

[0094] When the left and right working calipers are in the braking state, that is, the braking state, when the traveling block needs to be slowly lowered, the oil pressure of the oil circuit L19 and the oil circuit L23 can be adjusted.

[0095] Specifically, the oil circuit L8 is connected to the working clamp control module 28, the P interface of the working clamp control module 28 is connected to the oil circuit L8 through the oil circuit L13, the A interface of the working clamp control module 28 is connected to the G1 interface of the right working clamp control module 29 and the G2 interface of the left working clamp control module 210 through the oil circuit L14, and the L interface of the working clamp control module 28 is connected to the oil tank.

[0096] The G1 and G2 interfaces are control interfaces, which can control the oil pressure transmitted from the SP1 interface to the BR1 interface and from the SP2 interface to the BR2 interface.

[0097] like Figure 4 As shown, the working clamp control module 28 is used to control the lowering of the traveling carriage of the left and right working clamps. Specifically, in this embodiment, the first interface and the second interface of the first three-way valve 214 are connected, that is, the oil circuit L11 and the oil circuit L9 are connected, and the oil circuit L9 is connected to the oil circuit L10 and is connected to the X2 interface of the first hydraulically controlled reversing valve 211 and the X3 interface of the second hydraulically controlled reversing valve 212.

[0098] When the first ball valve 24.1, the second ball valve 24.2 and the third ball valve 24.3 are closed, the first accumulator 26.1 and the second accumulator 26.2 put the safety clamp 41 in a non-braking state, i.e., a brake-released state, through the oil circuit L8, the safety clamp control module 27, the oil circuit L9 and the oil circuit L11. At this time, there is oil pressure in the oil circuit L9, and the first hydraulically controlled reversing valve 211 and the second hydraulically controlled reversing valve 212 are in the left position through the oil circuit L10, i.e., the oil circuit L18 is connected to the oil circuit L19, and the oil circuit L22 is connected to the oil circuit L23.

[0099] The third accumulator 26.3 supplies oil to the SP1 interface of the right working clamp control module 29 through the oil circuit L16, and flows out through the BR1 interface, so that oil pressure exists in the oil circuit L19, and the right working clamp is in a braking state, i.e., the braking state; the fourth accumulator 26.4 supplies oil to the SP2 interface of the left working clamp control module 210 through the oil circuit L20, and flows out through the BR2 interface, so that oil pressure exists in the oil circuit L23, and the left working clamp is in a braking state, i.e., the braking state.

[0100] At this time, operate the working clamp control module 28 to change the oil pressure of the oil circuit L14 entering the G1 interface and the G2 interface, so that the oil pressure of the SP1 interface entering the BR1 interface and the SP2 interface entering the BR2 interface can be changed, so that the braking force of the left and right working clamps is changed, and then the braking force of the left and right working clamps is changed, and the traveling carriage can be slowly lowered under its own weight.

[0101] That is, when there is enough oil pressure in the accumulator, the left and right working clamps are slowly released by operating the working clamp control module, so that the traveling block is slowly lowered.

[0102] like Figure 4 As shown, when there is insufficient oil pressure in the accumulator and the left and right working clamps need to be lowered to move the traveling block, a second three-way valve 215 is provided at the oil outlet of the manual oil supply pump module 3, wherein the first interface of the second three-way valve 215 is connected to the manual oil supply pump module 3, the second interface of the second three-way valve 215 is connected to the oil circuit L1 through the oil circuit L3 and the oil circuit L2, and the third interface of the second three-way valve 215 is connected to the oil circuit L12.

[0103] Among them, the second three-way valve 215 can connect the first interface of the second three-way valve 215 and the third interface of the second three-way valve 215, and cut off the second interface of the second three-way valve 215, so that the manual oil supply pump module 3 is connected to the manual pump oil circuit and the oil circuit L3 is cut off; or, the second three-way valve 215 can connect the first interface of the second three-way valve 215 and the second interface of the second three-way valve 215, and cut off the third interface of the second three-way valve 215, so that the manual oil supply pump module 3 is cut off from the manual pump oil circuit and connected to the oil circuit L3.

[0104] When the safety clamp needs to lower the traveling block, the first interface and the third interface of the second three-way valve 215 are connected, and the manual oil supply pump module 3 provides oil pressure to the safety clamp through the oil circuit L12 and the oil circuit L11, so that the safety clamp 41 lowers the traveling block.

[0105] When the first interface 1 and the second interface 2 of the second three-way valve are connected, the manual oil supply pump module 3 provides oil pressure, and can supply oil to the first accumulator 26.1, the second accumulator 26.2, the third accumulator 26.3 and the fourth accumulator 26.4 through the oil circuit L3, the oil circuit L2, the oil circuit L1, the oil circuit L5, the oil circuit L6, the oil circuit L7 and the oil circuit L8, so that the oil pressure is accumulated inside them, and then the left and right working clamps can be lowered to the traveling block by operating the working clamp control module.

[0106] Therefore, there are three ways to lower the traveling carriage in this system;

[0107] The first one, such as Figure 1 As shown, by operating the manual oil supply pump module 3, the oil circuit L12 and the oil circuit L11 are used to directly supply oil to the safety clamp 41, so that the traveling block is slowly released;

[0108] The second type, such as Figure 3 As shown, when the oil pressure in the accumulator is sufficient, the oil pressure in the oil circuit L19 and the oil circuit L23 is slowly reduced by operating the working clamp control module 28, so that the left and right working clamps are slowly released, achieving the effect of slowly releasing the traveling carriage;

[0109] The third type, such as Figure 4 As shown, when the oil pressure in the accumulator is insufficient, the accumulator is first supplied with oil through the manual oil supply pump module 3 to make its oil pressure qualified, and then the working clamp control module 28 is operated to slowly reduce the oil pressure in the oil circuit L19 and the oil circuit L23, so that the left and right working clamps are slowly released to achieve the effect of slowly releasing the traveling carriage.

[0110] The method of lowering the traveling block can be selected according to the actual situation. In the first method, when there is no electricity in the entire system, the traveling block can be lowered in an emergency by manually operating the manual oil supply pump module 3. The second and third methods are implemented when there is electricity in the electronic control system of the system.

[0111] like Figure 5 As shown, the manual oil supply pump module 3 includes a handle 31 and a pump body 35, wherein the oil inlet S of the pump body 35 is connected to the oil source, wherein the oil outlet line of the pump body 35 is connected with a stop valve 34 and a second overflow valve 33, and the second overflow valve 33 and the stop valve 34 are both connected to the T1 interface of the oil tank.

[0112] The manual oil supply pump module 3 comprises a handle 31 , a sixth one-way valve 32 . 1 , a seventh one-way valve 32 . 2 , an eighth one-way valve 32 . 3 , a second overflow valve 33 , and a stop valve 34 .

[0113] The S interface of the pump body 35 is connected to the inlet of the sixth one-way valve 32.1, and the outlet of the sixth one-way valve 32.1 is connected to the pump body 35. The sixth one-way valve 32.1 opens when the pump body 35 absorbs oil and closes when the pump body 35 is loaded, blocking the pump body 35 from absorbing oil. By operating the handle 31, the pump body 35 is controlled to perform reciprocating actions of absorbing oil and loading.

[0114] The outlet of the pump body 35 is connected to the inlet of the seventh one-way valve 32.2, the outlet of the seventh one-way valve 32.2 is connected to the inlet of the eighth one-way valve 32.3, the outlet of the eighth one-way valve 32.3 is connected to the P3 interface of the manual oil supply pump module 3, the P3 interface is connected to the second three-way valve 215, the seventh one-way valve 32.2 and the eighth one-way valve 32.3 are closed when the pump body 35 absorbs oil, and are opened when the pump body 35 is loaded to output high-pressure oil to the P3 port, the outlet of the seventh one-way valve 32.2 is also connected to the inlet of the second overflow valve 33, the outlet of the second overflow valve 33 is connected to the T1 port of the manual oil supply pump module 3, and the second overflow valve 33 is used to limit the maximum pressure output by the manual oil supply pump module 3.

[0115] When the pressure at the P3 port reaches the set pressure of the high-pressure second relief valve 33, the inlet of the second relief valve 33 is connected to the T1 port of the manual oil supply pump module 3 to relieve pressure, the outlet of the eighth one-way valve 32.3 is connected to the inlet of the stop valve 34, and the outlet of the stop valve 34 is connected to the T1 port of the manual oil supply pump module 3. The stop valve 34 is used to adjust the pressure of the manual pump P3. At the same time, the handle 31 controls the pump body 35 to perform oil suction or loading reciprocating actions, and opens or closes through the sixth one-way valve 32.1, the seventh one-way valve 32.2 and the eighth one-way valve 32.3, and outputs high-pressure oil to the system through the manual pump P3 port. The second relief valve 33 is used to limit the maximum output pressure to ensure system safety. The stop valve 41 adjusts the oil pressure at the P3 port to achieve controllable output pressure of the manual oil supply pump module 3, thereby achieving controllable braking force of the safety clamp 41.

[0116] In order to ensure that the oil circuit of the entire system is more stable, a first one-way valve 21.1 is installed on the oil circuit L1, a high-pressure filter 23 and a third one-way valve 21.3 are installed on the oil circuit L5, a fourth one-way valve 21.4 is installed on the oil circuit L6, and a fifth one-way valve 21.5 is installed on the oil circuit L16.

[0117] The oil source is further provided with a P2 interface, which is connected to the oil circuit L2, wherein a second one-way valve 21.2 is installed at the P2 interface.

[0118] The oil circuit L2 is connected to the oil circuit L4 , and a first relief valve 22 is installed on the oil circuit L2 .

[0119] A first pressure gauge 25.1 is installed at the outlet of the first accumulator 26.1 and the second accumulator 26.2, a second pressure gauge 25.2 is installed at the outlet of the third accumulator 26.3, a third pressure gauge 25.3 is installed at the outlet of the fourth accumulator 26.4, and a fourth pressure gauge 213 is installed on the oil circuit L12.

[0120] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A control system for emergency lowering of a drilling rig traveling block, characterized in that: It comprises a right working clamp (42), a left working clamp (43), a safety clamp (41), an oil source, an oil tank and a manual oil supply pump module (3); The right working pliers (42) are connected to an oil source and an oil tank via a right working pliers oil circuit; The left working pliers (43) are connected to an oil source and an oil tank via a left working pliers oil circuit; The safety clamp (41) is connected to an oil source and an oil tank via a safety clamp oil circuit and a manual pump oil circuit. The safety clamp (41) can be selectively connected to the safety clamp oil circuit and disconnected from the manual pump oil circuit, or disconnected from the safety clamp oil circuit and connected to the manual pump oil circuit. The manual oil supply pump module (3) is arranged on the manual pump oil circuit so that the oil source supplies oil to the safety clamp (41) through the manual oil supply pump module (3).

2. A control system for emergency lowering of a drilling rig traveling carriage according to claim 1, characterized in that: Also includes a first three-way valve (214); The first interface of the first three-way valve (214) is connected to the safety clamp, the second interface of the first three-way valve (214) is connected to the safety clamp oil circuit, and the third interface of the first three-way valve (214) is connected to the manual pump oil circuit.

3. A control system for emergency lowering of a drilling rig traveling carriage according to claim 1, characterized in that: It also includes a left-side working clamp accumulator, a right-side working clamp accumulator and a safety clamp accumulator; Among them, the left working clamp accumulator is connected to the left working clamp oil circuit to supply oil to the left working clamp oil circuit; the right working clamp accumulator is connected to the right working clamp oil circuit to supply oil to the right working clamp oil circuit; the safety clamp accumulator is connected to the safety clamp oil circuit to supply oil to the safety clamp oil circuit.

4. A control system for emergency lowering of a drilling rig traveling carriage according to claim 3, characterized in that: It also includes an oil replenishment circuit, wherein the oil replenishment circuit can supply oil to the left working clamp accumulator, the right working clamp accumulator and the safety clamp accumulator through the manual oil supply pump module (3); The manual oil supply pump module (3) can be selectively connected to the safety gear oil circuit and cut off the oil supply oil circuit, or cut off the safety gear oil circuit and connected to the oil supply oil circuit.

5. A control system for emergency lowering of a drilling rig traveling carriage according to claim 4, characterized in that: Also includes a first three-way valve (214) and a second three-way valve (215); The first interface of the first three-way valve (214) is connected to the safety clamp, the second interface of the first three-way valve (214) is connected to the safety clamp oil circuit, and the third interface of the first three-way valve (214) is connected to the manual pump oil circuit; The first interface of the second three-way valve (215) is connected to the outlet of the manual oil supply pump module (3) through the manual pump oil circuit, the second interface of the second three-way valve (215) is respectively connected to the left working clamp accumulator, the right working clamp accumulator and the safety clamp accumulator through the oil replenishment oil circuit, and the third interface of the second three-way valve (215) is connected to the third interface of the first three-way valve (214) through the manual pump oil circuit.

6. A control system for emergency lowering of a traveling carriage of a drilling rig according to any one of claims 1 to 5, characterized in that: The manual oil supply pump module (3) comprises a handle (31), a pump body (35), a first oil discharge circuit and a stop valve (34); The oil inlet of the pump body (35) is connected to the oil source, the oil outlet of the pump body (35) is connected to the manual pump oil circuit, the oil circuit between the oil outlet of the pump body (35) and the manual pump oil circuit is connected to the oil tank via the first oil discharge circuit, and the shut-off valve is arranged on the first oil discharge circuit.

7. A control system for emergency lowering of a drilling rig traveling carriage according to claim 6, characterized in that: The manual oil supply pump module (3) further comprises a second oil discharge circuit and a second overflow valve (33); the oil circuit between the first oil discharge circuit and the oil outlet of the pump body (35) is connected to the oil tank via the second oil discharge circuit; the second overflow valve (33) is arranged on the second oil discharge circuit.

8. A control system for emergency lowering of a drilling rig traveling carriage according to claim 7, characterized in that: The manual oil supply pump module (3) further comprises a sixth one-way valve (32.1), a seventh one-way valve (32.2) and an eighth one-way valve (32.3); The sixth one-way valve (32.1) is arranged on the oil circuit between the oil source and the oil inlet of the pump body (35), the seventh one-way valve (32.2) is arranged on the oil circuit between the oil outlet of the pump body (35) and the second oil discharge circuit, and the eighth one-way valve (32.3) is arranged on the oil circuit between the first oil discharge circuit and the second oil discharge circuit.

9. A control system for emergency lowering of a drilling rig traveling carriage according to claim 3, characterized in that: A safety clamp control module (27) is arranged on the safety clamp oil circuit, the safety clamp oil circuit comprises an oil circuit L8, an oil circuit L9 and an oil circuit L11, the oil circuit L8 is connected to the P port of the safety clamp control module (27), the B port of the safety clamp control module (27) is connected to the safety clamp via the oil circuit L9 and the oil circuit L11 in sequence, and the T port of the safety clamp control module (27) is connected to the oil tank; The safety clamp control module (27) can selectively control the B port of the safety clamp control module (27) to be connected with the P port of the safety clamp control module (27) and the T port of the safety clamp control module (27) to be cut off, or to be cut off with the P port of the safety clamp control module (27) and connected with the T port of the safety clamp control module (27); The safety clamp accumulator comprises a first accumulator (26.1) and a second accumulator (26.2) connected in parallel, and the safety clamp accumulator is connected to the oil circuit L8.

10. A control system for emergency lowering of a drilling rig traveling carriage according to claim 9, characterized in that: The right working clamp oil circuit comprises an oil circuit L7, an oil circuit L16, an oil circuit L17, an oil circuit L18 and an oil circuit L19. A right working clamp control module (29) is also provided on the right working clamp oil circuit. The oil circuit L7 and the oil circuit L16 are connected to the SP1 port of the right working clamp control module (29). The T port of the right working clamp control module (29) is connected to the oil tank. A first hydraulically controlled reversing valve (211) is provided on the right working clamp oil circuit, the oil circuit L17 is respectively connected to the first hydraulically controlled reversing valve (211) and the oil circuit L16, the BR1 port of the right working clamp control module (29) is connected to the first hydraulically controlled reversing valve (211) via the oil circuit L18, and the first hydraulically controlled reversing valve (211) can connect or cut off the oil circuit L18 and the oil circuit L19; The control system for emergency lowering of the drilling rig traveling carriage also includes a working clamp control module (28) and an oil circuit L10, wherein the P port of the working clamp control module (28) is connected to the oil circuit L8 via the oil circuit L13, the A port of the working clamp control module (28) is connected to the G1 port of the right working clamp control module (29), the working clamp control module (28) can control the BR1 port of the right working clamp control module (29) to be connected to the SP1 port of the right working clamp control module (29) or to be connected to the T port of the right working clamp control module (29), and the oil circuit L9 is connected to the X2 port of the first hydraulically controlled reversing valve (211) via the oil circuit L10; The right working clamp accumulator comprises a third accumulator (26.3), and the safety clamp accumulator is connected to the oil circuit L16.

11. A control system for emergency lowering of a drilling rig traveling carriage according to claim 10, characterized in that: The left working clamp oil circuit comprises L6, oil circuit L20, oil circuit L21, oil circuit L22 and oil circuit L23; a left working clamp control module (210) is also provided on the left working clamp oil circuit; the oil circuit L6 and the oil circuit L120 are connected to the SP2 port of the left working clamp control module (210); and the T port of the left working clamp control module (210) is connected to the oil tank; A second hydraulically controlled reversing valve (212) is provided on the left working clamp oil circuit, the oil circuit L21 is respectively connected to the second hydraulically controlled reversing valve (212) and the oil circuit L20, the BR2 port of the left working clamp control module (210) is connected to the second hydraulically controlled reversing valve (212) via the oil circuit L22, and the second hydraulically controlled reversing valve (212) can connect or cut off the oil circuit L22 and the oil circuit L23; The A port of the working clamp control module (28) is connected to the G2 port of the left working clamp control module (210); the working clamp control module (28) can control the BR2 port of the left working clamp control module (210) to be connected to the SP2 port of the left working clamp control module (210) or to be connected to the T port of the left working clamp control module (210); the oil circuit L9 is connected to the X2 port of the second hydraulically controlled reversing valve (212) via the oil circuit L10; The left working clamp accumulator comprises a fourth accumulator (26.4), and the safety clamp accumulator is connected to the oil circuit L20.

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